FORM 2
THE PATENTS ACT, 1970
(39 Of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. TITLE OF THE INVENTION: PORTABLE AND COMPACT AUTONOMOUS GREYWATER RECYCLING DEVICE

FIELD OF THE INVENTION
The present invention generally relates to the water waste recycling system and more specifically to a portable and compact system and method for autonomous greywater recycling.
BACKGROUND OF THE INVENTION
As we all know that deficiency of useable water in the world is a serious issue. Therefore, different methods and systems are used for recycling the water waste. In a typical household, daily water usage may be substantial, which include washing dishes sink, laundry washing machine, shower, toilet, sink, and cleaning etc. mostly we use fresh water for all these needs and then discard it.
In household systems, a fresh water ends with either greywater or black water. Greywater is a discharged water with lightly contaminated, as by soaps, detergents and so forth. Whereas black water normally contains high counts of bacteria and directed to a septic or sewage system. Greywater can be safely reused for toilet flushing, garden, and landscaping.
A majority of urban Indian households use washing machines for daily needs. Conventional top-loading washing machines consume about 150 litres of water per load while front-loading machines consume approximately 75 litres. The wastewater generated by the washing machine goes into drains. If this wastewater from the washing machine is recycled, it can be reused in multiple ways ranging from

gardening to toilet flushing. Negligible number of consumers reuse their washing machine wastewater by filling it in buckets and throwing it manually in the toilets. The wastewater from the washing machine is contaminated with laundry detergents which is not very environment-friendly and release this water untreated into water bodies resulting into damages to all types of aquatic life.
Priorly, various greywater recycling devices are disclosed. All the existing devices contain a reservoir to store greywater and then stored water is pumped through a filter and to a holding tank where disinfection is done by adding chlorine. Most of the greywater recycling devises are very cumbersome and are not convenient to carry. They can only be used fixedly. They lack portability and versatility.
Therefore, there is a need in art for a portable and compact system and method for autonomous greywater recycling.
OBJECT OF THE INVENTION
An object of the invention is to provide a system and method for recycling domestic greywater.
Another object of the invention is to provide a compact and portable device for recycling domestic greywater.
Yet another object of the invention is to provide an automated greywater recycling system.
One more object of the invention is to filter and disinfect the greywater.

SUMMARY OF THE INVENTION
It is therefore an object of this invention to provide a portable and compact system and method for autonomous greywater recycling.
According to one aspect of the present invention, there is provided A portable and compact system for autonomous greywater recycling, the system comprises, a filtration chamber arranged to filter the greywater, a pumping unit arranged to pump the filtered greywater at a desired pressure to a disinfection chamber via a discharge pipe, wherein the disinfection chamber arranged to disinfect or sanitize the filtered greywater coming out of the filtration chamber, a bypass valve arranged to bypass the greywater from the filtration chamber to a drainage pipe, an electronic controlled unit arranged to automatically control the operation of the system, and a control panel and a display to show the data to the user. Wherein the filtration chamber comprises one or more filter membrane configured to collects insoluble suspended particles from the greywater, and an overflow sensor configured to sense the excess water in the filtration chamber, and an overflow pipe to discharge the excess water to the drainage pipe, wherein the disinfection chamber comprises one or more ultraviolet light torch or bulb configured to disinfect or sanitize the filtered greywater via ultraviolet light, wherein the filtered and disinfected water is pumped to the storage tank via the pumping unit, and wherein one or more filter membrane is a custom-made filter.

In accordance with an embodiment of the present invention the filtration chamber includes a backwash mechanism that cleans the choked filter membrane.
In accordance with an embodiment of the present invention, the filtration chamber includes a differential pressure sensor that measures the change in pressure across the inlet and outlet ports of the filtration chamber.
In accordance with an embodiment of the present invention, one or more ultraviolet light torch or bulb emits ultraviolet radiation.
In accordance with an embodiment of the present invention, one or more sensor is selected from, but not limited to, an ultrasonic level sensor, a capacitance level sensor, an optical sensor, an infrared sensor and a magnetic float level sensor.
In accordance with an embodiment of the present invention, the filtration chamber and disinfection chamber are coupled together in a single compact unit that is greywater recycling unit.
In accordance with an embodiment of the present invention, the custom-made filter is a multi-layer fabric filter media for micro-filtration.
According to second aspect of the present invention, there is provided a method for autonomous greywater recycling, the method comprises a step of receiving the greywater in a filtration chamber via an inlet port and pass through one or more filter membranes, pump the filtered greywater at a desired pressure to a disinfection chamber via a

pumping unit, receive the filtered greywater in the disinfection chamber and pass through an ultraviolet light or chlorine solution, sense the excess water in the system by one or more sensor and drain the excess water to the drainage via a drainage pipe, and bypass the greywater by a bypass valve arranged at inlet pipe when one or more filter membrane is chocked. wherein an electronic controlled unit configured to receive one or more sensory inputs using one or more sensor and send one or more output signal to take respective action.
In accordance with an embodiment of the present invention, the greywater is selected from, but not limited to wastewater of bathroom sinks, kitchen sinks, showers, tubs, and washing machines.
In accordance with an embodiment of the present invention, the electronic control unit consist of a microcontroller, memory, input, output, and communication links.
BRIEF DESCRIPTION OF THE DRAWINGS
The numerous advantages of the present invention may be better understood by those skilled in the art by reference to the accompanying figures in which:
FIG 1. is an exemplary environment of the greywater recycling solution for household application to which the various embodiments described herein may be implemented, in accordance with an embodiment of the present invention;

FIG 2. is a flow chart illustrating a method for autonomous greywater recycling of the present invention;
FIG 3. illustrates a simplified layout of the greywater recycling unit of the present invention;
FIG 4. illustrates an inner or functional part of a filtration chamber of the present invention;
FIG 5. illustrates an inner or functional part of a disinfection chamber of the present invention;
DETAILED DESCRIPTION OF THE DRAWINGS
The detailed description set forth below is intended as a description of various configurations of the subject technology and is not intended to represent the only configurations in which the subject technology may be practiced. The appended drawings are incorporated herein and constitute a part of the detailed description. The detailed description includes specific details for the purpose of providing a thorough understanding of the subject technology. However, it will be apparent to those skilled in the art that the subject technology may be practiced without these specific details. Like or similar components are labelled with the identical element numbers for ease of understanding. As used throughout this description, the word "may" is used in a permissive sense (i.e. meaning having the potential to), rather than the mandatory sense, (i.e. meaning must). Further, the words "a" or "an" mean "at least one” and the word “plurality” means “one or more”

unless otherwise mentioned. Furthermore, the terminology and phraseology used herein is solely used for descriptive purposes and should not be construed as limiting in scope. Language such as "including," "comprising," "having," "containing," or "involving," and variations thereof, is intended to be broad and encompass the subject matter listed thereafter, equivalents, and additional subject matter not recited, and is not intended to exclude other additives, components, integers or steps. Likewise, the term "comprising" is considered synonymous with the terms "including" or "containing" for applicable legal purposes.
It is appreciated that present invention can be implemented in variety of systems, devices, architectures and configurations that the invention can be used in a number of applications. The method and system in this invention offers a superior alternative to existing methods of recycling the domestic greywater.
With the evolving water recycling technology and its applications, the present invention proposes a system and methodology for recycling the domestic greywater and reuse it. The system provides a solution to collect, filter, disinfect and store the domestic greywater and deliver to cleaning and flushing in toilets or to gardening/landscaping activities.
FIG 1. is an exemplary environment 100 of the greywater recycling solution for household application to which the various embodiments described herein may be implemented. FIG 1. illustrates a household washing machine 102 associated with a user to wash the

dirty cloths. The washing machine 102 uses fresh water to wash the dirty cloths of the user. After washing cloths the water get lightly contaminated, as by soaps, detergents and so forth and become greywater. The greywater is further discharged from the drain port of the washing machine.
Further, the drainage port of the washing machine is connected to the inlet port an inventive greywater recycling unit 106 via flexible drainpipe 104. The greywater recycling unit 106 treat the greywater coming from the washing machine multilevel treatment processes and delivered the recycled water at the outlet port of the greywater recycling unit 106. The Outlet port of the greywater recycling unit 106 is further connected to the storage tank 110 through a flexible delivery pipe 108. The stored recycled water is the used for flushing of toilet 114 or gardening. Various embodiments of the present invention may now be understood with the exemplary environment 100 as a reference.
FIG 2. is a flow chart illustrating a method 200 for autonomous greywater recycling, in accordance with an embodiment of the present invention.
The method starts at step 202, where the greywater coming out of various domestic appliances like washing dishes sink, laundry washing machine, shower, toilet, sink, and cleaning, etc. is received at the inlet port 310 of the filtration chamber 308 of the greywater recycling unit 106. Further, the greywater passes through one or more filter membranes that are configured to filter out insoluble suspended particles such as hair, dead skin, dirt, lint, cotton fiber, paper, plastic, or

any other solid wastes. Whereas one or more filter membranes are used in the filtration chamber 308 is a custom-made multi-layer fabric filter media for micro-filtration.
At step 204, the filtered greywater coming out of the filtration chamber 308 is temporarily stored in a holding tank 314 and then it is pumped to a disinfection chamber 318 by using an electric pump unit 316.
At step 206, the pressurised greywater from the electric pump unit 316 is received at the disinfection chamber of greywater recycling unit 106. Further, the filtered greywater inside the disinfection chamber 318 gets exposed to UV radiation emitted by the 254 nm UV-C light lamp.
At step 208, Sometimes the greywater recycling unit 106 may collect excess greywater than its capacity due to continuous discharge of greywater from domestic appliances. One or more sensors 312 are arranged and configured within the holding tank 314 to remove the excess greywater from the greywater recycling unit 106. Where the excess water inside the greywater recycling unit 106 is sensed by one or more sensors 312, and a signal is sent to an electronic control unit 324. The electronic control unit 324 reads the signal and commands to opens the drainage valve 328 of the greywater recycling unit 106 to drain the excess water.
At step 210, the water flow rate decreases when the insoluble suspended particles are stuck in the front of one or more filter membranes, and bypassing is required. This decrease in greywater flow

rate is sensed by one or more sensors 410 and a signal is sent to an electronic control unit 324. Further, the electronic control unit reads the signal and command to opens the bypass valve 304 is arranged prior to the filtration chamber 308, which bypass the flow of domestic greywater directly to the drain.
FIG 3. illustrates a simplified layout of the greywater recycling unit 300. The switch 302 is configured to start/ stop the device. When the switch 302 is in OFF position, bypass valve 304 shall be in open position and greywater coming out of domestic appliances shall be sent to drain using bypass pipeline 306. When the switch is in ON position, bypass valve 304 shall be in closed position and greywater shall enter in a filter chamber 308. The inlet pipe 310 allows the water to flow into the filtration chamber 308.
At first, the greywater passes through one or more filter membranes which collect insoluble suspended particles such as hair, dead skin, dirt, lint, cotton fiber, paper, plastic, or any other solid wastes. The greywater is filtered using filter membrane which is made of material selected from fabric, polypropylene, nylon or similar media and have built-in clogging alarm mechanism using infrared sensors. Whenever the filter accumulates excessive quantity of suspended particles such as hair, dead skin, dirt, lint, cotton fibre, paper, plastic or any other solid waste, the electronic control unit 324 gives an audio and/or visual alarm informing the user of the clogged filter.
Once greywater passes through one or more filter membranes and all insoluble suspended particles are filtered out, it is temporarily

stored in a holding tank 314 and then delivered for further treatment to the disinfection chamber 318. In case the excess of water in holding tank is sensed by the overflow sensor 312, it is passed to the overflow valve 328 where the water can be discharged to the drain via the drainage pipe 330. After filtration process, the filtered water is pumped to the disinfection chamber 318 by using electric pump unit 316. The filtered water enters the pump through suction pipe. The electric pump may operate on 12/24 V DC or 230 V AC supply and have enough power to circulate water with desired pressure head and flow rate. The pump discharge pipe will supply pressurized filtered greywater to the disinfection chamber 318. The greywater has dissolved detergent and may contain very small number of pathogens/bacteria. The disinfection chamber comprises of a cylindrical shell inside which a UV bulb is housed. The bulb may or may not be protected with a quartz glass sleeve. The UV bulb operates on 230 V AC supply. The primary function of the disinfection chamber is to destroy/deactivate all pathogens, bacteria and other microbes present in the greywater. In another variation of this device, the disinfection chamber comprises of chlorine treatment instead of UV light, wherein chlorine tablets are placed in the chamber. Appropriate quantities of chlorine will get dissolved with the greywater which shall act as disinfectant.
Further, the treated greywater is then passed through a flow sensor 320 which measures the flow rate of the treated water. The flow sensor 320 may be of turbine type (direct contact) or electrostatic/ultrasonic type (non-contact). The flow sensor sends a signal to the electronic control unit 324 which will indicate

instantaneous as well as aggregate flow rate of treated water passing through the system. The recycled greywater then reaches the wall-mounted external storage tank via delivery pipe 322, and further which can be utilized by the user for toilet flushing or gardening. Additionally, there is a control panel and a display 326 to show the data to the user.
FIG 4. illustrates an inner or functional part of the filtration chamber 308. The filtration chamber comprises of a filter basket 402, an inlet port 404, an outlet port 406, a backwash mechanism, removable top cover 408 and differential pressure sensor 410. The greywater coming out of domestic appliances is received at the inlet port 404 of the filtration chamber 400 and sent to the filter basket 402. In the filter basket, one or more filter membranes 412 are arranged to filter out the insoluble suspended particles. The greywater passes through the filter basket 402, where all its insoluble suspended particles present in the greywater are separated. The filtered greywater is further discharged through the outlet port 406 to the temporary holding tank 314. In addition, there is a differential pressure sensor 410 which, by measuring the pressure difference between the inlet 404 and outlet 406 of the filter basket 402, detects filter clogging. The filter basket also has an integrated clogging alarm mechanism which alerts the user. When the filter basket is clogged, the backwash mechanism activates and reverses the water flow that cleans the filter basket and drains into a drainage all the clogged particles and solids. There is a removable top cap 408 that provides easy access to the filtration chamber inside.
FIG 5. illustrates an inner or functional part of the disinfection chamber 318. The disinfection chamber 318 has a cylindrical enclosure

502 made of stainless steel and a UV bulb 504 is housed inside it. The bulb 504 may or may not be protected with a quartz glass sleeve. The UV bulb 504 emits ultraviolet radiation which shall destroy or deactivate all pathogens, bacteria and other microbes that might be present in the greywater. It operates on 230 V AC power supply. The filtered greywater is pumped from the holding tank 314 to the disinfection chamber inlet 508, where the filtered greywater is exposed to 254 nm of UV-C light that deactivates or kills germs, pathogens and bacteria in the filtered greywater. Furthermore, the filtered and disinfected water is discharged through the outlet 506 of the disinfection chamber into the storage tank 110.
The system described above is compact in design and easy to port from one place to another. The system also has a display (LED/LCD panel or equivalent) for displaying critical information about the functioning of the system. The display may provide information on water flow rate, status of filters, UV bulb, etc. The electronic control unit (ECU) is responsible for controlling the entire system including turning ON/OFF pump, UV lamp, opening/closing of control valves, providing alarms, etc. The ECU may also have capabilities for wireless data transfer using technologies such as Bluetooth, WiFi and GSM/GPRS. The whole system runs on 230 V AC input power and the ECU is also responsible for supplying electric power to all components such as pump 205, UV chamber 207, valves 213 and 220 and display panel 215.
Those with skill in the art would appreciate that various components and blocks may be arranged differently (e.g., arranged in a

different order, or partitioned in a different way) all without departing from the scope of the subject technology.
The above description is provided to enable any person skilled in the art to practice the various aspects described herein. The previous description provides various examples of the subject technology, and the subject technology is not limited to these examples. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. For example, while the foregoing was described in the context of a rewards or redemption program and associated liabilities, it will be understood that other applications may use aspects of the subject technology to track information and assess changing value as provided by the system and processes disclosed. Thus, the claims are not intended to be limited to the aspects shown herein but is to be accorded the full scope consistent with the language claims.

We Claim: -
1. A portable and compact system (300) for autonomous greywater recycling, the system comprising:
a filtration chamber (308) arranged to filter the greywater;
a pumping unit (316) arranged to pump the filtered greywater at a desired pressure to a disinfection chamber (318) via a discharge pipe;
wherein the disinfection chamber (318) arranged to disinfect or sanitize the filtered greywater coming out of the filtration chamber (308);
a bypass valve (304) arranged to bypass the greywater from the filtration chamber (308) to a drainage pipe (330);
an electronic controlled unit (324) arranged to automatically control the operation of the system; and
a control panel and a display (326) to show the data to the user;
wherein the filtration chamber (308) comprises one or more filter membrane configured to collects insoluble suspended particles from the greywater, and an overflow sensor (312) configured to sense the excess water in the filtration chamber, and an overflow valve (328) to discharge the excess water to the drainage pipe (330);
wherein the disinfection chamber (318) comprises one or more ultraviolet light torch or bulb (504) configured to disinfect or sanitize the filtered greywater via ultraviolet light;

wherein the filtered and disinfected water is pass through a flow sensor (320) which will measure the flow rate of the treated water; and
Wherein one or more filter membrane is a custom-made filter.
2. The system as claimed in claim 1, wherein the filtration chamber (308) includes a backwash mechanism that cleans the choked filter membrane.
3. The system as claimed in claim 1, wherein the filtration chamber 308 includes a differential pressure sensor (410) that measures the change in pressure across the inlet (404) and outlet (406) ports on the filtration chamber (308).
4. The system as claimed in claim 1, wherein one or more ultraviolet light torch or bulb emits ultraviolet radiation.
5. The system as claimed in claim 1, wherein one or more sensor is selected from an ultrasonic level sensor, a capacitance level sensor, an optical sensor, an infrared sensor and a magnetic float level sensor.
6. The system as claimed in claim 1, wherein the filtration chamber 308 and disinfection chamber (318) are coupled together in a single compact unit that is greywater recycling unit (106).
7. The system as claimed in claim 1, wherein the custom-made filter is a multi-layer fabric filter media for micro-filtration.
8. A method (200) for autonomous greywater recycling, the method comprising a step of:

receiving the greywater in a filtration chamber (308) via an inlet port (404) and pass through one or more filter membranes;
pumping the filtered greywater at a desired pressure to a disinfection chamber (308) via a pump unit (316).
receiving the filtered greywater in the disinfection chamber and pass through an ultraviolet light or chlorine solution;
sensing the excess water in the system by one or more sensor and draining the excess water to the drainage via a drainage pipe (330);
bypassing the greywater by a bypass valve (304) arranged at inlet pipe 310 when one or more filter membrane is chocked; and
wherein an electronic controlled unit (324) configured to:
receiving one or more sensory inputs using one or more sensor; and
sending one or more output signal to take respective action.
9. The method as claimed in claim 8, wherein the greywater can be
wastewater of bathroom sinks, kitchen sinks, showers, tubs, and
washing machines.
10. The method as claimed in claim 8, wherein the electronic control
unit (324) consist of a microcontroller, memory, input, output, and
communication links.