FORM 2
THE PATENT ACT 1970
(39 OF 1970)
&
The Patents Rules, 2003
COMPLETE SPECIFICTION
(See section 10 and rule 13)
1. TITLE OF THE INVENTION
A self-sustainable zero influent and zero discharge waste to energy system and method for treating sugar industry effluent and distillery spent wash
2. APPLICANT
(a) NAME: Transcarb Energy Private Limited.
(b) NATIONALITY: A company incorporated in India
(c) ADDRESS :. (504, 360 Degree Business Park, LBS Marg, Mulund West, Mumbai - 400080. India.
3. PREAMBLE TO THE DESCRIPTION
COMPLETE
The following specification particularly describes the invention and the manner in which it is to be performed.

Field of the Invention:
This invention relates to the field of systems for recycling and systems for energy production.
Particularly, this invention relates to the field of systems for recycling and systems for energy production, especially pertaining to the Sugar Industry Complex consisting of Sugar Factory, Cogeneration Power Plant and Distillery.
More particularly, this invention relates to a self-sustainable zero influent and zero discharge waste to energy system and method for treating sugar factory effluent and distillery spent wash.
Background of the Invention:
More than 145 million tonnes of sugar (sucrose) is produced per year in about 120 countries. Annual consumption is expanding each year by about 2 million tonnes. Around 60-70 percent is produced from sugar cane with the remainder from sugar beet.
The cultivation and processing of sugar produce environmental impacts through the loss of natural habitats, intensive use of water, heavy use of agro-chemicals, discharge and runoff of polluted effluent and air pollution. This leads to the degradation of wildlife, soil, air and water where sugar is produced and of downstream ecosystems.
Although many of the environmental impacts of cane and beet cultivation are generic to agriculture, some impacts are distinct, particularly in their severity.

Impacts relating to irrigation of sugar cane and pollution runoff are of particular concern.
Most Sugar Industries Complex have associated distillery and cogeneration power plant. The Sugar factory operates during crushing season which lasts for approximately 150 days in a year. The sugar factory generates five organic waste streams, mainly:
1) Bagasse:
This is the fibre residue left after cane crushing, to extract their juice, and is utilised as a feed for cogeneration power plant. This is available during the crushing season.
Bagasse production is about 28% to 30% by weight of original cane. Bagasse is very commonly used as fuel in boilers in sugar mills for production of steam as well as electrical power i.e. cogeneration. The steam is used in the processing of sugarcane to sugar. It is also used in prime movers and in steam turbines for production of electrical power for running electrical motors and other power requirements of the sugar mills.
2) Press Mud:
This is fibrous waste produced in the sugar factory and as such is utilised in the boiler or as compost material along with spent wash. This is available during the crushing season.

Press mud is obtained in sugar factories to a tune of 3 to 5% of the weight of sugarcane crushed. Press mud contains sizable quantity of macro and micro nutrients, besides 20-25% of organic carbon.
3) Sugar Plant Effluent:
This liquid effluent is produced in the sugar plant during the crushing season of 150 days. Factory effluents contain mainly organic waste, small amounts of salts and used water.
4) Molasses:
This viscous liquid organic waste is produced in the sugar factory during the 150 days crushing season. Molasses is utilised as raw material to produce alcohol in a distillery. Molasses is a dark brown viscous liquid obtained by centrifuging the massecuite (a suspension of sugar crystals in syrup produced in a sugar factory) as by-product of sugar while processing sugarcane sugar. It contains nearly 45% uncrystallized, fermentable sugar and some sucrose.
The final molasses accounts for around 3 to 5% on quantity of sugarcane crushed.
5) Spent Wash:
Spent wash is a toxic effluent produced by the distillery during the process of alcohol production. Spent wash produced would range between 8 to 12 litres for every litre of alcohol produced.

According to the existing state of the art, the cogeneration power plant (in accordance with the sugar Factory) operates between about 180 to 200 days per year, mainly due to unavailability of raw material during cane crushing off-season.
The distillery operates between 180 to 200 days per year, due to zero discharge laws of Central Pollution Control Board.
Presently, the spent wash is hazardous and the biggest environmental problem faced by the Sugar and Distillery Factory.
On the otheT hand, energy requirement is an ever-increasing and ongoing process. Rapid urbanization and concurrent industrialization has led to tremendous dependence upon energy. Renewable energy or energy from renewable sources is a topic of great research and development. Recycling is the art of using the waste and processing it so as to clear / clean the environment and to extract more from the waste, efficiently, in order to provide a sustainable environmental solution. An offshoot of this recycling of waste can be energy production.
Also, waste recycling has many significant advantages. It leads to less utilization of raw materials. It reduces environmental impacts arising from waste treatment and disposal. It makes the surroundings cleaner and healthier. It saves on landfill space. It reduces the amount of energy required to manufacture new products. It also reduces the carbon footprint.
There is no cohesive, collaborative, self-sustainable system which incorporates the various waste products generated by the sugar Factory in order for conversion to utilities of importance for the sugar Factory itself as well as for the civilization, in

general. Individual modules and tools may be known for treating various waste components independently. However, there is no one-stop-shop or a single-unit facility which cumulatively provides a solution for or which incorporates a mutual interdependence system for alleviating the hazards of the waste components by processing and treating them for efficient utility based purposes.
The system described herein provides a distributed grid of outputs and their usage to develop a sustainable eco-system with multi-input, multi-process, and multi-output nodes.
Prior Art:
IP 1038193 discloses a method for removing excess ionic components in the waste liquid from sugar Factory. The steps of adsorption, separation, and electrodialysis are used in this patent document.
CN101455326 discloses a method for using molasses (of sugar industry) to extract oil.
CN1450005 discloses a method for treating alcoholic molasses word of cane sugar mill, solid discarded material of cane sugar mill. It discloses utilizing the action of biological bacteria to change the above-mentioned discarded material into the biological bacteria fertilizer.
CN101712805 discloses a method for preparing degradable agricultural mulches by reusing organic waste residues of biomass from the sugar industry.

CN2199979 discloses a waste water treating device for a sugar refinery. It provides a method for discharging waste water from the sugar refinery.
CN1324770 discloses a method for treating waste water of cane sugar refinery such that it makes the waste water meet discharge standards, does not pollute environment, and the obtained solid material can be used as chemical fertilizer
CN1289531 discloses a process for treating and reclaiiriing waste liquid of molasses alcohol. It includes the steps of mixing the sugarcane pitch with said waste liquid in ratio inoculating edible metatrophic fungus, and culturing to obtain bacterial feed and edible fungus.
JP2004298677 discloses an anaerobic treatment method for sugar-based waste water. It is applicable for sugar-based liquid like the waste water discharged in a beer producing process.
CN101266102 discloses a method of waste water zero draining for a cane sugar factory. The system of this patent makes use of self-water of the cane to implement a closed-circulating production, so as to save a plurality of process water and realize the waste water zero draining to make economic and social benefits.
CN201283266 discloses a three-waste disposal device of sugar-refinery boiler high smoke processing efficiency and obvious economic benefits, which saves energy and water, and dedusting wastewater and solid ash.
CN 1978657 discloses a method to produce alcohol using discarded sugar materials from sugar refinery's mud.

CN101653257 discloses a method for preparing edible bacterial gel using mainly waste molasses from sugarcane sugar refinery as raw material.
JP57014117 discloses a method wherein waste liquid resulting from the fermentation of the waste molasses in an energy saving manner. The waste liquid is burned after it is concentrated by a multistage concentration step in the industry of fermentation in which the waste molasses as a by-product is used as a raw material for the production of sucroses from sugar cane.
GB2100749 discloses a method for treating molasses.
CN1978657 discloses a method for producing alcohol raw material utilizing sugar plant mud waste sugar. This patent provides a method to produce alcohol using discarded sugar materials from sugar refinery's mud.
RU2301266 discloses a method for purifying molasses from the sugar industry.
FR2813301 discloses a method for treating effluents containing alcohol and sugar to produce water, dry matter and alcohol. This method includes the steps of evaporative concentration and distillation.
EP0756011 discloses a process for treatment of molasses obtained as by-products in the sugar manufacture.
ES2041220 discloses an application for eliminating waste effluents from the sugar industry and the production of olive oil.

ES2009267 discloses an effluent water treatment system and method. It details the process, for purification of effluents from wineries, paper-making plants, distilleries for producing alcohol form sugar cane.
GB826164 discloses improvements in or relating to molasses treatment.
GB249759 discloses a process for the treatment of molasses and sugary juices.
GB190106931 discloses improvements relating to the treatment of liquid waste products obtained in the manufacture of sugar.
US4009046 discloses a process for treating sugar-factory molasses.
US2002069987 discloses an integrated process for the combined fermentation and the conversion of liquid and solid residues generated by the cane sugar industry into a variety of useful products. The process combines elements of alcohol-based organosolv pulping with fermentation.
US2011117620 discloses a process for producing methane from process water and biogenic material such as that occurring in the production of sugar and ethanol.
CN101979477 discloses a process for preparing the biomass fuel rod from stevia rebaudiana sugar waste residues. It includes the steps of fermenting, heating, drying, cooling, compressing, and molding. The biomass fuel rod produced by the process has the advantages of large capacity, small volume, high calorific value, high combustibility, convenience in use, cleanness, sanitation, environmental-

friendliness, low sulfur dioxide (S02) emission and low NOx generation in the process of combustion, environmentally-friendly energy source and no environmental pollution.
CN101250066 discloses a method for producing biological leaf fertilizer by using waste molasses of sugar plant.
US2011124894 discloses a method for obtaining long chain aliphatic alcohols and fatty acids from sugar cane mud and related wax esters. The solid waste resulting from the process can be disposed of or utilized as a soil substitute following an optional water wash.
EP0949204 discloses a water treatment process for waste water containing sugar or alcohol.
US2010047889 discloses a method and apparatus for continuous flow bio-fuel production. In this, feedstocks include, but are not limited to, material normally discarded from food production facilities including drink syrups, juices or waste water from corn or sugar processing plants.
There is no system or method which discloses a complete or an end-to-end self-sustainable integrated zero influent and zero discharge waste to energy process for treating sugar Factory effluent and distillery spent wash.
Objects of the Invention:
An object of the invention is to provide a self-sustainable sugar Factory based waste management system and process.

Another object of the invention is to provide a self-sustainable sugar Factory based waste management system and process incorporating waste components / items including 1) Press Mud; 2) Sugar Factory Effluent; and 3) Distillery Spent Wash.
Yet another object of the invention is to provide an integrated sugar Factory based waste management system and process, involving various waste items from the sugar based Factory.
Still another object of the invention is to provide a system which converts sugar factory press mud, sugar Factory effluent, distillery spent wash into electrical power, solid fuel and useable water.
An additional object of the invention is to provide a self-sustainable integrated sugar Factory waste management system and process.
Yet an additional object of the invention is to provide a self-sustainable sugar factory waste produce based energy generation system and process.
Still an additional object of the invention is to provide a self-sustainable sugar factory waste recycling system and process.
Another additional object of the invention is to provide a self-sustainable sugar factory waste based system which produces and provides additional solid fuel to existing sugar Factory co-generation plant so that they operate for more number of days.

Yet another additional object of the invention is to provide a self-sustainable sugar factory waste water recycling plant.
Still another object of the invention is to increase the working productivity of the sugar factory and affiliated industries.
An additional object of the invention is to protect environment.
Yet an additional object of the invention is to provide a sustainable waste disposal, waste management, and subsequent energy production and useful byproduct generation activity.
Still an additional object of the invention is to provide a revenue generating mechanism for a defined portion of the community.
Another additional object of the invention is to provide a system which converts waste items or waste components into energy and useful items which include electrical power, solid fuel, and RO water.
Summary of the Invention:
According to this invention, there is provided a self-sustainable zero influent and zero discharge waste to energy system and method for treating sugar factory effluent and distillery spent wash, said system comprises:
first Biomethanation and Anaerobic Digestion Module adapted to receive sugar factory effluent, press mud, and reverse osmosis reject water for obtaining biogas and organic digestate;

second Biomethanation and Anaerobic Digestion Module adapted to receive distillery spent wash and liquid filtrate from micro strainer for obtaining biogas and dilute organic liquid effluent digestate;
Biogas Cleanup Module adapted to receive said biogas from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module for converting hazardous hydrogen sulphide in the biogas into elemental sulphur and moisture-free Dry biogas;
Biogas Engine Generator Module adapted to receive said moisture-free Dry biogas from said Biogas Cleanup Module, luke warm water from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module for producing electrical power, hot exhaust gas and hot water;
Biogas Engine Exhaust Gas Waste Heat Recovery Module adapted to receive said hot exhaust gas from said Biogas Engine Generator Module and hot condensate water from Solid Fuel Module for producing steam, and cooled exhaust gas for expulsion into atmosphere;
Solid Fuel Module adapted to receive said organic digestate from said first Biomethanation and Anaerobic Digestion Module, hot water from said Biogas Engine Generator Module, steam from said Biogas Engine Exhaust Gas Waste Heat Recovery Module for producing solid fuel for a co-generation plant, Liquid Filtrate from Micro strainer for said second Biomethanation and Anaerobic Digestion Module; and warm water to maintain temperature for the said first and Second Biomethanation and Anaerobic Digestion Module; and
Reverse Osmosis Waste Water Treatment Module adapted to receive said diluted organic liquid effluent digestate from said second Biomethanation

and Anaerobic Digestion Module for obtaining filtered effluent for reverse osmosis unit which outputs a first pre-defined portion of reverse osmosis usable water and a second remainder pre-defined portion of reverse osmosis reject effluent as feed to first Biomethanation and Anaerobic Digestion Module.
Typically, said first Biomethanation and Anaerobic Digestion Module is a Long Retention Time Biomethanation and Anaerobic Digestion Module.
Typically, said first Biomethanation and Anaerobic Digestion Module comprises Sugar factory Effluent tank adapted to store sugar factory effluent.
Typically, said first Biomethanation and Anaerobic Digestion Module comprises Storage Silo adapted to store press mud.
Typically, said first Biomethanation and Anaerobic Digestion Module comprises RO reject effluent tank adapted to store RO reject effluent.
Typically, said first Biomethanation and Anaerobic Digestion Module comprises a first Anaerobic Digester/Reactor adapted to receive sugar factory effluent, Press Mud, and RO Reject in pre-defined portions so that digestion of complex organic feed takes place for a pre-defined period (retention time) for being broken down into simple organic compounds resulting in the production of biogas.
Typically, said first Biomethanation and Anaerobic Digestion Module comprises a first Anaerobic Post Digester/Reactor, adapted to receive feed from a first Anaerobic Digester/Reactor, where the simple organic compounds are digested by

microorganisms for a pre-defined period (retention time) resulting in the production of Biogas and Organic Digestate.
Typically, said second Biomethanation and Anaerobic Digestion Module is a Short Retention Time Biomethanation and Anaerobic Digestion Module.
Typically, said second Biomethanation and Anaerobic Digestion Module comprises storage tank for storing Distillery Spent Wash and for storing liquid filtrate from micro strainer.
Typically, said second Biomethanation and Anaerobic Digestion Module comprises a second Anaerobic Digester/Reactor for receiving distillery spent wash and Liquid filtrate from Micro Strainer having high COD (Chemical Oxygen Demand) value and high BOD (Biochemical Oxygen Demand) Value so that digestion of complex organic feed takes place for a pre-defined period (retention time) and they are broken down into simple organic compounds resulting in the production of biogas.
Typically, said second Biomethanation and Anaerobic Digestion Module comprises a second Anaerobic Post Digester/Reactor, adapted to receive feed from the second Anaerobic Digester/Reactor, where the simple organic compounds are digested by microorganisms for a pre-defined period (retention time) resulting in the production of Biogas and Dilute Organic Liquid Effluent Digestate.
Typically, said Biogas Cleanup Module comprises means to receive biogas along with inherent moisture and hydrogen sulfide from said first Biomethanation and

Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module.
Typically, said Biogas Cleanup Module comprises Biogas Filter Unit adapted to receive biogas along with inherent moisture and hydrogen sulfide and further adapted to receive air from an air compressor for precipitating out sulphur.
Typically, said Biogas Cleanup Module comprises moisture condensing unit adapted to receive biogas, said moisture condensing unit being cooled by cold water from a refrigerant unit so that moisture condenses and thereafter the moisture-free, dry Biogas is utilized as a fuel in said a Biogas Engine Generator Module.
Typically, said Biogas Cleanup Module comprises a feedback means adapted to form a feedback loop for receiving warm water from moisture condensing unit and supplying said warm water to a refrigerant unit for providing cold water after cooling the warm water in a closed loop.
Typically, said Biogas Engine Generator Module comprises means to receive luke warm water from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module, which luke warm water is formed due to warm water which was used to heat and maintain temperature of said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module.

Typically, said Biogas Engine Generator Module comprises means to transfer luke warm water to heat exchanger where heat exchange takes place and Luke Warm Water is heated up prior to being fed as Hot Water into said Solid Fuel Module.
Typically, said Biogas Engine Generator Module comprises Biogas Engine Generator adapted to receive and utilise Dry biogas, as fuel, from said Biogas Cleanup Module, said Biogas Engine Generator further adapted to convert said Dry Biogas into Electrical Power and Hot Exhaust Gas.
Typically, said Biogas Engine Generator Module comprises a heat exchanger so that hot water flows to said Heat Exchanger, from Biogas Engine Generator, for getting cooled and cooled water flows from said Heat Exchanger, to the Biogas Engine Generator, for cooling said generator.
Typically, said Biogas Engine Generator Module comprises a first closed loop feedback means adapted to form a closed loop water cooling circuit along with Heat Exchanger and Biogas Engine Generator in order to cool the engine, maintain a constant engine temperature, and recover the heat produced in the engine.
Typically, said Biogas Engine Generator Module comprises a second closed loop feedback means adapted to form a closed loop water circuit along with said Solid Fuel Module and each of said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module in order to circulate warm water.

Typically, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprises means to receive hot exhaust gas from said Biogas Engine Generator Module.
Typically, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprises Waste Heat Recovery Boiler adapted to use heat from said hot exhaust gas to convert the hot condensate water returning from the Solid Fuel Module into steam.
Typically, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprises closed loop feedback means adapted to provide a circulating closed loop path for hot condensate water from said Solid Fuel Module to said Waste Heat Recovery Boiler.
Typically, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprises Waste Heat Recovery Boiler adapted to output cooled exhaust gas obtained on account of transfer of heat of said Hot Exhaust Gas in said Waste Heat Recovery Boiler.
Typically, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprises a chimney adapted to safely expel cooled exhaust gas, into the atmosphere, from said Waste Heat Recovery Boiler.
Typically, said Solid Fuel Module comprises De-watering Screw Press adapted to receive said organic digestate, from said first Biomethanation and Anaerobic Digestion Module, for solid liquid separation in order to obtain Solids and Liquid Digestate.

Typically, said Solid Fuel Module comprises a micro strainer for receiving liquid digestate from De-watering Screw Press for recovering smaller Solids particle from said Liquid Digestate.
Typically, said Solid Fuel Module comprises a Pre-heater adapted to receive Solids with high moisture content, said pre-heater utilising the heat from Hot Water from said Biogas Engine Generator Module to preheat said Solids prior to transferring to said Solid Fuel Dryer.
Typically, said Solid Fuel Module comprises a Solid Fuel Dryer adapted to produce Solid Fuel by evaporating the moisture from the Solids, thereby reducing the moisture content and increasing its calorific value.
Typically, said Solid Fuel Module comprises a Briquetting Unit adapted to receive solid fuel from Solid Fuel dryer, said Briquetting Unit further adapted to compact said Solid fuel into Solid Fuel Briquette for use in Sugar Industry Complex Cogeneration Plant to produce electrical power.
Typically, said Solid Fuel Module comprises means to receive heat for Solid Fuel dryer from steam produced in said Biogas Engine Exhaust Gas Waste Heat Recovery Module.
Typically, said Solid Fuel Module comprises closed loop feedback means adapted to form a closed loop for circulating Hot Condensate Water from Solid Fuel dryer to said Biogas Engine Exhaust Gas Waste Heat Recovery Module.

Typically, said Solid Fuel Module comprises means to pump Liquid Filtrate from Micro Strainer, as a feed, to said second Biomethanation and Anaerobic Digestion Module.
Typically, said Reverse Osmosis Waste Water Treatment Module comprises a pre-filter unit adapted to receive Diluted Organic Liquid Effluent Digestate with low BOD and COD from said second Biomethanation and Anaerobic Digestion Module.
Typically, said Reverse Osmosis Waste Water Treatment Module comprises a Reverse Osmosis (RO) Unit adapted to receive filtered effluent from pre-fllter unit for providing a first pre-defined portion of reverse osmosis usable water and a second remainder pre-defined portion of reverse osmosis reject effluent, said first pre-defined portion adapted to be transferred to a Reverse Osmosis Water Storage Tank to be recycled and said second pre-defined portion adapted to be used as feed for first Biomethanation and Anaerobic Digestion Module.
Typically, said Reverse Osmosis Waste Water Treatment Module comprises means to transfer organic filter residue from the pre-fllter unit as a feed for the first Biomethanation and Anaerobic Digestion Module.
Typically, said Reverse Osmosis Waste Water Treatment Module comprises means to transfer Concentrated Liquid RO Reject effluent as a feed for the first Biomethanation and Anaerobic Digestion Module.

According to this invention, there is provided a self-sustainable zero influent and zero discharge waste to energy method for treating sugar factory effluent and distillery spent wash, said method comprises the steps of:
- first Biomethanation and Anaerobic Digestion Module adapted to receive sugar factory effluent, press mud, and reverse osmosis reject water for obtaining biogas and organic digestate;
- second Biomethanation and Anaerobic Digestion Module adapted to receive distillery spent wash and Liquid Filtrate from Micro-Strainer for obtaining biogas and dilute organic liquid effluent digestate;
- receiving said Biogas from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module, using Biogas Cleanup Module, for converting hazardous hydrogen sulphide into elemental sulphur, and moisture-free Dry biogas;
- receiving said moisture-free Dry biogas from said Biogas Cleanup Module, luke warm water from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module, using Biogas Engine Generator Module, for producing electrical power, hot exhaust gas and hot water;
- receiving said hot exhaust gas from said Biogas Engine Generator Module, receiving hot condensate water from said Solid Fuel Module thereafter, using Biogas Engine Exhaust Gas Waste Heat Recovery Module, for producing steam, and cooled exhaust gas for expulsion into atmosphere;
- receiving said organic digestate from said first Biomethanation and Anaerobic Digestion Module, Hot Water from said Biogas Engine Generator Module, Steam from said Biogas Engine Exhaust Gas Waste Heat Recovery Module, using Solid Fuel Module, for producing solid fuel for a co-

generation plant, Liquid Filtrate from micro Strainer for said second Biomethanation and Anaerobic Digestion Module; and Receiving said diluted organic liquid effluent digestate from said second Biomethanation and Anaerobic Digestion Module, using Reverse Osmosis Waste Water Treatment Module, for obtaining filtered effluent for reverse osmosis unit which outputs a first pre-defined portion of reverse osmosis usable water and a second remainder pre-defined portion of reverse osmosis reject effluent.
Brief Description of the Accompanying Drawings:
The invention will now be described in relation to the accompanying drawings, in which:
Figure 1 illustrates a schematic of the self-sustainable zero influent and zero discharge waste to energy system and method for treating sugar factory effluent and distillery spent wash;
Figure 2 illustrates a schematic of the first (Long Retention Time) Biomethanation and Anaerobic Digestion Module of the system of Figure 1;
Figure 3 illustrates a schematic of the second (Short Retention Time Biomethanation) and Anaerobic Digestion Module of the system of Figure 1;
Figure 4 illustrates a schematic of the Biogas Cleanup Module of the system of Figure 1;

Figure 5 illustrates a schematic of the Biogas Engine Generator Module of the system of Figure 1;
Figure 6 illustrates a schematic of the Biogas Engine Exhaust Gas Waste Heat Recovery Module of the system of Figure 1;
Figure 7 illustrates a schematic of the Solid Fuel Module of the system of Figure 1; and
Figure 8 illustrates a schematic of the RO Waste Water Treatment Module of the system of Figure 1.
Detailed Description of the Accompanying Drawings:
According to this invention, there is provided a self-sustainable zero influent and zero discharge waste to energy system and method for treating sugar factory effluent and distillery spent wash.
Figure 1 illustrates a schematic of this system (100).
In accordance with an embodiment of this invention, there is provided a first (Long Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-L).
Figure 2 illustrates a schematic of the first (Long Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-L) of the system of Figure 1.

Sugar factory Effluent from a Storage Tank (1), Press Mud from a Storage Silo (2) and RO Reject (3) are fed into a first Anaerobic Digester/Reactor (6). The feeding quantity of press mud is determined based on number of days of plant operation that is desired. Here, digestion of complex organic feed takes place for a period (retention time) which would be between about 20 to 30 days and they are broken down into simple organic compounds.
After completion of desired retention time, the feed from the first Anaerobic Digester/Reactor (6) is pumped into a first Anaerobic Post Digester/Reactor (7), where the simple organic compounds are digested by microorganisms for a period (retention time) which would be between about 20 to 30 days and result in the production of Biogas (10) and Organic Digestate (33).
Generated biogas (10) is supplied as feed to a Biogas Cleanup Module (BCM) (as seen in Figure 4 of the accompanying drawings).
Organic digestate (33) is supplied as feed to a Solid fuel Module (SFM) (as seen in Figure 7 of the accompanying drawings).
In accordance with another embodiment of this invention, there is provided a second (Short Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-S).
Figure 3 illustrates a schematic of the second (Short Retention Time Biomethanation) and Anaerobic Digestion Module (BADM-S) of the system of Figure 1.

Distillery Spent Wash from Storage Tank (4) and Liquid Filtrate from Micro Strainer (5) having high COD (Chemical Oxygen Demand) value and high BOD (Biochemical Oxygen Demand) Value are fed into a second Anaerobic UASB (Upflow Anaerobic Sludge Blanket) or similar suitable Digester/Reactor (8), where digestion of complex organic feed takes place for a period (retention time) which would be between about 1 to 4 days and they are broken down into simple organic compounds.
Thereafter, the feed is pumped into second Anaerobic UASB (Upflow Anaerobic Sludge Blanket) or similar suitable Post Digester/Reactor (9), where the simple organic compounds are digested by microorganisms for a period (retention time) which would be between about 1 to 4 days and result in the production of Biogas (10) which would be an input for the said Biogas Cleanup Module and Dilute Organic Liquid Effluent Digestate (34) which would be an input for the said Solid Fuel Module.
In accordance with yet another embodiment of this invention, there is provided a Biogas Cleanup Module (BCM).
Figure 4 illustrates a schematic of the Biogas Cleanup Module (BCM) of the system of Figure 1.
The Biogas (10) produced in the first (Long Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-L) and in the second (Short Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-S) contains biogas with moisture and H2S. The Biogas (10) is first transferred into a Biogas Filter Unit (14). An air compressor (37) supplies air (38) to the biogas filter unit (14). This

unit (14) contains multiple iron mesh through which biogas (10) and air (38) is passed. Here, Sulphur deposits onto the mesh. Biogas along with Moisture is transferred for further processing to a moisture condensing unit (36). Moisture along with Biogas, as output from Biogas filter unit (14), is referenced by numeral 50.
The moisture condensing unit (36) uses cold water (44) produced in the Refrigerant unit (43). In the moisture condensing unit (36), moisture condenses and thereafter the moisture-free, Dry Biogas (40) is utilized as a fuel in a Biogas Engine Generator Module (BEGM) (as seen in Figure 5 of the accompanying dxawiogs). Warm w&tes (42} v^bick vs> a& output ftotf- tte maistaxe coiad^s.ia.% unit is fed back as a feed in a closed loop back to the Refrigerant Unit (43).
The Sulphur (39) from Biogas filter is collected (in a module referenced by numeral 49 in the accompanying drawings), bagged and sold to sugar factory.
In accordance with still another embodiment of this invention, there is provided a Biogas Engine Generator Module (BEGM).
Figure 5 illustrates a schematic of the Biogas Engine Generator Module (BEGM) of the system of Figure 1.
Dry Biogas (40) from Biogas Cleanup Module (BCM) (as seen in Figure 4 of the accompanying drawings) is utilised as fuel for Biogas Engine Generator (17).
The Biogas Engine Generator (17) converts the Dry Biogas (40) into Electrical Power (23) and Hot Exhaust Gas (26). The hot exhaust gas (26) is fed to a Biogas

Engine Exhaust Gas Waste Recovery Module (BGWM) (as seen in Figure 6 of the accompanying drawings).
A closed Loop water cooling circuit along with Heat Exchanger (41) is included as a part of Biogas Engine Generator (17) in order to cool the engine, maintain a constant engine temperature and recover the heat produced in the engine. Hot water (48) flows to the Heat Exchanger (41), from the biogas engine generator (17), for getting cooled and Cooled water flows from the Heat Exchanger (41), to the biogas engine generator (17), for cooling the biogas engine generator (17).
Warm Water (42) which was used to heat and maintain temperature of first (Long Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-L) (as seen in Figure 2 of the accompanying drawings) and second (Short Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-S) (as seen in Figure 3 of the accompanying drawings) comes out as luke warm water (45). This luke warm water (45) is fed into heat exchanger (41) where heat exchange takes place and Luke Warm Water (45) is heated up prior to being fed as Hot Water (54) into a Solid Fuel Module (SFM) (as seen in Figure 7 of the accompanying drawings).
Warm water (42) from the Solid Fuel Module (SFM) (as seen in Figure 7 of the accompanying drawings) is fed in a feedback loop to the first (Long Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-L) (as seen in Figure 2 of the accompanying drawings) and second (Short Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-S) (as seen in Figure 3 of the accompanying drawings), simultaneously.

In accordance with an additional embodiment of this invention, there is provided a Biogas Engine Exhaust Gas Waste Heat Recovery Module (BGWM).
Figure 6 illustrates a schematic of the Biogas Engine Exhaust Gas Waste Heat Recovery Module (BGWM) of the system of Figure 1.
Heat from the Hot Exhaust Gas (26) produced by Biogas Engine Generator Module (BEGM) (as seen in Figure 5 of the accompanying drawings) is used and recovered by a Waster Heat Recovery Boiler (18), which uses this heat to convert the hot condensate water (27) returning from the Solid Fuel Module (SFM) (as seen in Figure 7 of the accompanying drawings) into steam (28).
This steam (28) is used as process heat by the Solid Fuel Module (SFM) (as seen in Figure 7 of the accompanying drawings). After transferring heat, the steam (28), will condense into hot condensate water (27).
The hot condensate water (27) is used as feed again in a closed loop by the Waste Heat Recovery Boiler (18).
The Hot Exhaust Gas (26) on account of transfer of heat in the Waste Heat recovery Boiler (18) would now have a much reduced temperature and may be now called cooled exhaust gas (25). This gas can now be safely expelled into atmosphere through a Chimney (24).
In accordance with yet an additional embodiment of this invention, there is provided a Solid Fuel Module (SFM).

Figure 7 illustrates a schematic of the Solid Fuel Module (SFM) of the system of Figure 1.
After appropriate retention time the Organic Digestate (33) (consisting of solid and liquid), from the first (Long Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-L) (as seen in Figure 2 of the accompanying drawings), is pumped into a De-watering Screw Press (15) for solid liquid separation. Here, the Digestate (33) is separated into Solids (29) and Liquid Digestate (30).
The Liquid Digestate (30) from De-watering Screw Press (15) is then transferred into a Micro strainer (16) for recovering smaller particle Solids (29) from the Liquid Digestate (30).
The solids (29) with high moisture content is then transferred into a Pre-heater (47) which utilizes the heat from Hot Water (54) from Biogas Engine Generator Module (BEGM) (as seen in Figure 5 of the accompanying drawings) to preheat the solids (29) prior to transferring to a Solid Fuel Dryer (19). The heated solids is referenced by numeral 51. The warm water (42) from the pre-heater (47) is given as feed to the first (Long Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-L) (as seen in Figure 3 of the accompanying drawings) and the second (Short Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-S) (as seen in Figure 3 of the accompanying drawings).
In the Solid Fuel Dryer (19) the Solid Fuel (20) is produced by evaporating the moisture from the Solids (29) thereby reducing the moisture content and increasing the calorific value.

The Solid Fuel (20), which is fibrous in nature, is transferred to a Briquetting Unit (21), where the solid fuel is compacted into Solid Fuel Briquette (13), which is then stored and used as fuel in existing Sugar Industry Complex Cogeneration Plant (22) to produce additional electrical power.
The heat for this dryer is provided by Steam (28) produced in the Biogas Engine Exhaust Gas Waste Heat Recovery Module (BGWM) (as seen in Figure 6 of the accompanying drawings.)
The steam (28) after transferring heat in the Solid Fuel Dryer (19) condenses into Hot Condensate Water (27). This Hot condensate water is used in a closed loop as feed again for the Biogas Engine Exhaust Gas Waste Heat Recovery Module (BGWM) (as seen in Figure 6 of the accompanying drawings.)
The Liquid Filtrate (5) from Micro Strainer (16) is then pumped as a feed to the second (Short Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-S) (as seen in Figure 3 of the accompanying drawings).
In accordance with still an additional embodiment of this invention, there is provided a RO Waste Water Treatment Module (WTM).
Figure 8 illustrates a schematic of the RO Waste Water Treatment Module (WTM) of the system of Figure 1.
Diluted Organic Liquid Effluent Digestate (34) with low BOD and COD from second (Short Retention Time) Biomethanation and Anaerobic Digestion Module

(BADM-S) (as seen in Figure 3 of the accompanying drawings) is pumped into a pre-filter unit (35).
The filtered effluent (52) is then pumped into a Reverse Osmosis (RO) Unit (11). In this RO unit (11), close to 70% of the liquid effluent is converted to RO Usable water (31) and 30% of the effluent is expelled as Concentrated Liquid RO Reject Effluent (3).
A portion of the pure water is utilised as process water within the plant and balance water is transferred to RO Water Storage Tank (12) to be recycled (53).
The organic filter residue (46) from the pre-filter unit (35) and the Concentrated Liquid RO Reject effluent (3) is used as a feed for the first (Long Retention Time) Biomethanation and Anaerobic Digestion Module (BADM-L) (as seen in Figure 2 of the accompanying drawings).
The advantages of the proposed invention lie in provisioning a self-sustainable collaborative platform for treating the waste items from the sugar Factory for the following advantages:
a) zero influent;
Water required for the sugar Factory would be available from the system and method of this invention and hence sugar factory need not depend on ground water or municipal water. Hence fresh water resources need not be tapped by the factory.
b) zero discharge;

There is no solid or liquid waste that is generated from the system and method of this invention.
c) electrical power;
Useful renewable energy in the form of electrical power is produced in the system and method of this invention.
d) solid fuel;
The organic waste streams are converted into solid fuel, using the system and method of this invention, which would provide feed in the form of solid fuel for the existing Sugar Industry Cogeneration Power Plant.
e) water;
RO water is produced by the system and method of this invention, which is a much needed and useful product.
f) cogeneration plant;
The sugar Factory cogeneration power plant which prior to utilizing this invention operates between about 180 to 200 days, now due to the availability of additional solid fuel will be able to operate for more number of days, bringing in additional revenue and commercial value, due to the system and method of this invention.
g) distillery;
On account of Zero Discharge by the system and method of this invention, the distillery can now operate without pollution control board restrictions for more number of days (including off-season) bringing in additional revenue and commercial value.

h) eliminating polluting components.
The system and method of this invention provides a self sustainable waste to
energy solution, which not only eliminates waste and environmental issues
associated with waste, but also, provides useful energy products there by
generating revenue and making utilization of this process commercially viable and
lucrative.
While this detailed description has disclosed certain specific embodiments of the present invention for illustrative purposes, various modifications will be apparent to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

We claim;
1. A self-sustainable zero influent and zero discharge waste to energy system and method for treating sugar factory effluent and distillery spent wash, said system comprising:
- first Biomethanation and Anaerobic Digestion Module adapted to receive sugar factory effluent, press mud, and reverse osmosis reject water for obtaining biogas and organic digestate;
- second Biomethanation and Anaerobic Digestion Module adapted to receive distillery spent wash and liquid filtrate from Micro Strainer for obtaining biogas and dilute organic liquid effluent digestate;
- Biogas Cleanup Module adapted to receive said biogas from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module for converting hazardous hydrogen sulphide in the biogas into elemental sulphur, and moisture-free Dry biogas;
- Biogas Engine Generator Module adapted to receive said moisture-free dry biogas from said Biogas Cleanup Module, luke warm water from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module for producing electrical power, hot exhaust gas and hot water;
- Biogas Engine Exhaust Gas Waste Heat Recovery Module adapted to receive said Hot Exhaust Gas from said Biogas Engine Generator Module and hot condensate water from said Solid Fuel Module for producing Steam, and cooled exhaust gas for expulsion into atmosphere;
- Solid Fuel Module adapted to receive said organic digestate from first Biomethanation and Anaerobic Digestion Module, hot water from said

Biogas Engine Generator Module, steam from said Biogas Engine Exhaust Gas Waste Heat Recovery Module for producing solid fuel for a co-generation plant, liquid filtrate from Micro strainer for said second Biomethanation and Anaerobic Digestion Module; Hot condensate water from Solid Fuel Dryer returned in close loop to said Biogas Engine Exhaust Gas Waste Heat Recovery Module for producing steam; and - Reverse Osmosis Waste Water Treatment Module adapted to receive said diluted organic liquid effluent digestate from said second Biomethanation and Anaerobic Digestion Module for obtaining filtered effluent for reverse osmosis unit which outputs a first pre-defined portion of reverse osmosis usable water and a second remainder pre-defined portion of reverse osmosis reject effluent as feed to first Biomethanation and Anaerobic Digestion Module.
2. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module is a Long Retention Time Biomethanation and Anaerobic Digestion Module.
3. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module comprising Sugar factory Effluent tank adapted to store sugar factory effluent.
4. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module comprising Storage Silo adapted to store press mud.

5. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module comprising RO reject effluent tank adapted to store RO reject effluent.
6. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module comprising a first Anaerobic Digester/Reactor adapted to receive sugar factory effluent, Press Mud, and RO Reject in predefined portions so that digestion of complex organic feed takes place for a pre-defined period (retention time) for being broken down into simple organic compounds resulting in the production of biogas.
7. A system as claimed in claim 1 wherein, said first Biomethanation and Anaerobic Digestion Module comprising a first Anaerobic Post Digester/Reactor, adapted to receive feed from a first Anaerobic Digester/Reactor, where the simple organic compounds are digested by microorganisms for a pre-defined period (retention time) resulting in the production of Biogas and Organic Digestate.
8. A system as claimed in claim 1 wherein, said second Biomethanation and Anaerobic Digestion Module is a Short Retention Time Biomethanation and Anaerobic Digestion Module.
9. A system as claimed in claim 1 wherein, said second Biomethanation and Anaerobic Digestion Module comprising storage tank for storing Distillery Spent Wash and for storing liquid filtrate from micro strainer.

10.A system as claimed in claim 1 wherein, said second Biomethanation and Anaerobic Digestion Module comprising a second Anaerobic Post Digester/Reactor for receiving distillery spent wash and Liquid filtrate from Micro Strainer having high COD (Chemical Oxygen Demand) value and high BOD (Biochemical Oxygen Demand) Value so that digestion of complex organic feed takes place for a pre-defined period (retention time) and they are broken down into simple organic compounds resulting in the production of biogas.
11.A system as claimed in claim 1 wherein, said second Biomethanation and Anaerobic Digestion Module comprising a second Anaerobic Post Digester/Reactor, adapted to receive feed from a second Anaerobic Digester/Reactor, where the simple organic compounds are digested by microorganisms for a pre-defined period (retention time) resulting in the production of Biogas and Dilute Organic Liquid Effluent Digestate.
12. A system as claimed in claim 1 wherein, said Biogas Cleanup Module comprising means to receive biogas along with inherent moisture and hydrogen sulfide from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module.
13.A system as claimed in claim 1 wherein, said Biogas Cleanup Module comprising Biogas Filter Unit adapted to receive biogas along with inherent moisture and hydrogen sulfide and further adapted to receive air from an air compressor for precipitating out sulphur.

14.A system as claimed in claim 1 wherein, said Biogas Cleanup Module comprising moisture condensing unit adapted to receive biogas, said moisture condensing unit being cooled by cold water from a refrigerant unit so that moisture condenses and thereafter the moisture-free, dry Biogas is utilised as a fuel in said Biogas Engine Generator Module.
15.A system as claimed in claim 1 wherein, said Biogas Cleanup Module comprising a feedback means adapted to form a feedback loop for receiving warm water from moisture condensing unit and supplying said warm water to a refrigerant unit for providing cold water after cooling the warm water in a closed loop.
16.A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising means to receive luke warm water from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module, which luke warm water is formed due to warm water which was used to heat and maintain temperature of said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module.
17.A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising means to transfer luke warm water to heat exchanger where heat exchange takes place and Luke Warm Water is heated up prior to being fed as Hot Water into said Solid Fuel Module.
18.A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising Biogas Engine Generator adapted to receive and utilise

Dry biogas, as fuel, from said Biogas Cleanup Module, said Biogas Engine Generator further adapted to convert said Dry Biogas into Electrical Power and Hot Exhaust Gas.
19.A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising a heat exchanger so that hot water flows to said Heat Exchanger, from Biogas Engine Generator, for getting cooled and cooled water flows from said Heat Exchanger, to the Biogas Engine Generator, for cooling said biogas engine generator.
2G.A system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising a first closed loop feedback means adapted to form a closed loop water cooling circuit along with Heat Exchanger and Biogas Engine Generator in order to cool the engine, maintain a constant engine temperature, and recover the heat produced in the engine.
2 LA system as claimed in claim 1 wherein, said Biogas Engine Generator Module comprising a second closed loop feedback means adapted to form a closed loop water circuit along with said Solid Fuel Module and each of said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module in order to circulate warm water.
22.A system as claimed in claim 1 wherein, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprising means to receive hot exhaust gas from said Biogas Engine Generator Module.

23.A system as claimed in claim 1 wherein, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprising Waste Heat Recovery Boiler adapted to use heat from said hot exhaust gas to convert the hot condensate water returning from the Solid Fuel Module into steam.
24.A system as claimed in claim 1 wherein, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprising closed loop feedback means adapted to provide a circulating closed loop path for hot condensate water from said Solid Fuel Module to said Waste Heat Recovery boiler.
25.A system as claimed in claim 1 wherein, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprising Waste Heat Recovery Boiler adapted to output cooled exhaust gas obtained on account of transfer of heat of said Hot Exhaust Gas in said Waste Heat Recovery Boiler.
26.A system as claimed in claim 1 wherein, said Biogas Engine Exhaust Gas Waste Heat Recovery Module comprising a chimney adapted to safely expel cooled exhaust gas, into the atmosphere, from said Waste Heat Recovery Boiler.
27. A system as claimed in claim 1 wherein, said Solid Fuel Module comprising De-watering Screw Press adapted to receive said Organic Digestate, from said first Biomethanation and Anaerobic Digestion Module, for solid liquid separation in order to obtain Solids and Liquid Digestate.

28.A system as claimed in claim 1 wherein, said Solid Fuel Module comprising a micro strainer for receiving liquid digestate from De-watering Screw Press for recovering smaller Solid particle from said Liquid Digestate.
29.A system as claimed in claim 1 wherein, said Solid Fuel Module comprising a Pre-heater adapted to receive Solids with high moisture content, said pre-heater utilising the heat from Hot Water from said Biogas Engine Generator Module to preheat said solids prior to transferring to said Solid Fuel Dryer.
30.A system as claimed in claim 1 wherein, said Solid Fuel Module comprising a Sotid ¥ud Y>iyer adapted to piodwe So&i Eral by waporaSiag ftfc moisture from the Solids, thereby reducing the moisture content and increasing its calorific value.
31. A system as claimed in claim 1 wherein, said Solid Fuel Module comprising a Briquetting Unit adapted to receive Solid Fuel from Solid Fuel dryer, said Briquetting Unit further adapted to compact said solid fuel into Solid Fuel Briquette for use in Sugar Industry Complex Cogeneration Plant to produce Electrical power.
32.A system as claimed in claim 1 wherein, said Solid Fuel Module comprising means to receive heat for Solid Fuel Dryer from steam produced in said Biogas Engine Exhaust Gas Waste Heat Recovery Module.
33.A system as claimed in claim 1 wherein, said Solid Fuel Module comprising closed loop feedback means adapted to form a closed loop for circulating

Hot Condensate Water from Solid Fuel dryer to said Biogas Engine Exhaust Gas Waste Heat Recovery Module.
34.A system as claimed in claim 1 wherein, said Solid Fuel Module comprising means to pump Liquid filtrate from Micro Strainer, as a feed, to said second Biomethanation and Anaerobic Digestion Module.
35.A system as claimed in claim 1 wherein, said Reverse Osmosis Waste Water Treatment Module comprising a pre-filter unit adapted to receive Diluted Organic Liquid Effluent Digestate with low BOD and COD from said second Biomethanation and Anaerobic Digestion Module.
36.A system as claimed in claim 1 wherein, said Reverse Osmosis Waste Water Treatment Module comprising a Reverse Osmosis (RO) Unit adapted to receive filtered effluent from pre-filter unit for providing a first pre-defined portion of reverse osmosis usable water and a second remainder pre-defined portion of reverse osmosis reject effluent, said first pre-defined portion adapted to be transferred to a Reverse Osmosis Water Storage Tank to be recycled and said second pre-defined portion adapted to be used as feed for first Biomethanation and Anaerobic Digestion Module.
37.A system as claimed in claim 1 wherein, said Reverse Osmosis Waste Water Treatment Module comprising means to transfer organic filter residue from the pre-filter unit as a feed for the first Biomethanation and Anaerobic Digestion Module.

38.A system as claimed in claim 1 wherein, said Reverse Osmosis Waste Water Treatment Module comprising means to transfer Concentrated Liquid RO Reject effluent as a feed for the first Biomethanation and Anaerobic Digestion Module.
39.A self-sustainable zero influent and zero discharge waste to energy method for treating sugar factory effluent and distillery spent wash, said method comprising the steps of:
- first Biomethanation and Anaerobic Digestion Module adapted to receive sugar factory effluent, press mud, and reverse osmosis reject water for obtaining biogas and organic digestate;
- second Biomethanation and Anaerobic Digestion Module adapted to receive distillery spent wash and liquid filtrate from micro strainer for obtaining biogas and dilute organic liquid effluent digestate;
- receiving said biogas from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module, using Biogas Cleanup Module, for converting hazardous hydrogen sulphide in the biogas into elemental sulphur, and moisture-free dry biogas;
- receiving said moisture-free dry biogas from said Biogas Cleanup Module, luke warm water from said first Biomethanation and Anaerobic Digestion Module and said second Biomethanation and Anaerobic Digestion Module, using Biogas Engine Generator Module, for producing electrical power, hot exhaust gas and hot water,
- receiving said hot exhaust gas from said Biogas Engine Generator Module, hot condensate water from the said Solid Fuel Module, using Biogas Engine

Exhaust Gas Waste Heat Recovery Module, thereafter, for producing steam, and cooled exhaust gas for expulsion into atmosphere;
- receiving said organic digestate from said first Biomethanation and Anaerobic Digestion Module, hot water from said Biogas Engine Generator Module, Steam from said Biogas Engine Exhaust Gas Waste Heat Recovery Module, using Solid Fuel Module, for producing solid fuel for a co-generation plant, liquid Filtrate from micro strainer for said second Biomethanation and Anaerobic Digestion Module; and
- receiving said diluted organic liquid effluent digestate from said second Biomethanation and Anaerobic Digestion Module, using Reverse Osmosis Waste Water Treatment Module, for obtaining filtered effluent for reverse osmosis unit which outputs a first pre-defined portion of reverse osmosis usable water and a second remainder pre-defined portion of reverse osmosis reject effluent.