DESC:TECHNICAL FIELD
The present disclosure relates generally to a sewage treatment plant. More particularly, the present disclosure relates to technology integration of modular tank design and hybrid process optimization of sewage treatment plant.
BACKGROUND
In order to protect environment and promote public health, communities typically require sewage water treatment. Discharge of untreated sewage water is not suitable, since it may give rise to numerous environmental concerns, such as pollution of surface and groundwater resources.
The traditional sewage treatment plant may include septic tanks connected to drain fields, on-site sewage systems (OSS), Verm filter systems, etc. Existing water treatment systems produce very high sludge rates and involves mechanical moving parts with more space utilization & requires more space and time for installation.
The design and functioning of a sewage treatment plant may contain following constraints such as lack of commitment to environment, lack of appreciation of enormous benefits of recycle and reuse, economical constrains, lack of necessary knowledge and skills on technology, lack of commitment for proper operation and maintenance, and external pressures etc.
In addition to the above, there is poor service and maintenance after installation of the system specially in residential and commercial apartments with no systematic recorded data availability of water treated and reuse details which leads to inconsistent in water quality output.
Therefore, there exists a need for an efficient sewage treatment plant that is capable of solving aforementioned problems of the conventional sewage treatment plants.
SUMMARY
In view of the foregoing, a wastewater treatment system is disclosed. The wastewater treatment system includes an inlet unit adapted to receive wastewater; a bio-media tank adapted to hold bio-media such that the bio-media tank is disposed downstream to the inlet unit. The bio-media facilitates in one of, nitrification and partial denitrification of the wastewater. The bio-media tank includes an air diffuser to transfer oxygen in the bio-media tank for biological degradation of pollutants in the wastewater to convert the wastewater into biologically degraded water. The wastewater treatment system further includes an aeration tank that is coupled to the bio-media tank. The aeration tank includes a plurality of jet aerators that are adapted to provide air to the aeration tank to produce aerated water. The wastewater treatment system further includes a membrane-bioreactor tank disposed downstream to the bio-media tank and the aeration tank and adapted to hold a plurality of membranes that are adapted to remove organic and suspended wastes from the aerated water to convert the aerated water into treated water.
In some embodiments, the wastewater treatment system includes an anoxic tank that is disposed downstream to the bio-media tank and upstream to the aeration tank, wherein the anoxic tank is adapted to denitrify the biologically degraded water to convert the biologically degraded water into denitrified water.
In some embodiments, the aeration tank further includes a monitoring unit disposed within the aeration tank and configured to determine one of a biochemical oxygen demand (BOD) value of the aerated water and a chemical oxygen demand (COD) value of the aerated water.
In some embodiments, the wastewater treatment system further includes a treated water tank that is disposed downstream to the membrane-bioreactor tank and adapted to store the treated water; and an outlet unit that is disposed downstream to the treated water tank and adapted to discharge the treated water.
In some embodiments, the wastewater treatment system further includes an oil skimmer that is disposed downstream to the inlet unit and upstream to the bio-media tank and adapted to remove oil from the wastewater.
In some embodiments, the inlet unit further includes a screen device with a plurality of screens that facilitates loading of the wastewater into the inlet unit while maintaining uniform velocity of the wastewater.
In some embodiments, the bio-media tank further includes a retainer plate that is adapted to prevent over-flow of the bio-media while the bio-media tank converts the wastewater into the biologically degraded water.
In some embodiments, each membrane of the plurality of membranes is a flat sheet membrane adapted to remove of organic and suspended wastes from the aerated water.
In some aspects, a method for treating wastewater is disclosed. The method includes receiving, by way of an inlet unit, the wastewater. Further, the method includes providing, by way of an air diffuser, oxygen in a bio-media tank disposed downstream to the inlet unit, for biological degradation of pollutants in the wastewater to convert the wastewater into biologically degraded water. The method further includes providing, by way of a plurality of jet aerators, air to an aeration tank coupled to the bio-media tank, to produce aerated water. The method further includes removing, by way of a plurality of membranes of a membrane-bioreactor tank disposed downstream to the bio-media tank and the aeration tank, organic and suspended wastes from the aerated water to convert the aerated water into treated water.
In some embodiments, the method further includes denitrifying, by way of an anoxic tank disposed downstream to the bio-media tank and upstream to the aeration tank, the biologically degraded water to convert the biologically degraded water into denitrified water.
BRIEF DESCRIPTION OF DRAWINGS
The above and still further features and advantages of aspects of the present disclosure becomes apparent upon consideration of the following detailed description of aspects thereof, especially when taken in conjunction with the accompanying drawings, and wherein:
FIG. 1 illustrates a block diagram of a wastewater treatment system, in accordance with an embodiment herein;
FIG. 2 illustrates a perspective view of a screen device of an input unit of the wastewater treatment system of FIG. 1, in accordance with an embodiment herein; and
FIG. 3 illustrates a flowchart depicting a method for treating wastewater, in accordance with an embodiment herein.
To facilitate understanding, like reference numerals have been used, where possible, to designate like elements common to the figures.
DETAILED DESCRIPTION
Various aspects of the present disclosure provide a sewage treatment plant and method thereof. The following description provides specific details of certain aspects of the disclosure illustrated in the drawings to provide a thorough understanding of those aspects. It should be recognized, however, that the present disclosure can be reflected in additional aspects and the disclosure may be practiced without some of the details in the following description.
The various aspects including the example aspects are now described more fully with reference to the accompanying drawings, in which the various aspects of the disclosure are shown. The disclosure may, however, be embodied in different forms and should not be construed as limited to the aspects set forth herein. Rather, these aspects are provided so that this disclosure is thorough and complete, and fully conveys the scope of the disclosure to those skilled in the art. In the drawings, the sizes of components may be exaggerated for clarity.
It is understood that when an element or layer is referred to as being “on,” “connected to,” or “coupled to” another element or layer, it can be directly on, connected to, or coupled to the other element or layer or intervening elements or layers that may be present. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
The subject matter of example aspects, as disclosed herein, is described with specificity to meet statutory requirements. However, the description itself is not intended to limit the scope of this disclosure. Rather, the inventor/inventors have contemplated that the claimed subject matter might also be embodied in other ways, to include different features or combinations of features similar to the ones described in this document, in conjunction with other technologies. Generally, the various aspects including the example aspects relate to a sewage treatment plant and method thereof.
FIG. 1 illustrates a block diagram of a sewage treatment plant 100 (hereinafter interchangeably referred to and designated as “wastewater treatment system 100” or “system 100) to treat sewage (hereinafter interchangeably designated as “wastewater”). The system 100 may be installed in vicinity of a wastewater collection unit. In some examples, the system 100 may be installed at an outlet of a facility that produces wastewater during one or more operations being carried out in the facility. Embodiments of the present disclosure are intended to include and/or otherwise cover any type of the facility, without deviating from the scope of the present disclosure. The system 100 may facilitate integration of functionalities of bio-media with a plurality of membranes to treat wastewater. The system 100 may be adapted to treat the wastewater by way of a combination of interconnected tanks. Specifically, the wastewater may be flown across various interconnected tanks of the system 100.
In some embodiments, overall capacity of the system 100 may be 50 Kilolitres per day i.e., 50 KLD. The term “overall capacity” as used herein refers to the overall volume of the wastewater that the system 100 may treat in one day.
The system 100 may include an inlet unit 102, an oil-skimmer 104, a bio-media tank 106, an anoxic tank 108, an aeration tank 110, a membrane bio-reactor tank 112, a treated water tank 114, and an outlet unit 116.
The inlet unit 102 may be disposed at an entry point of the system 100. The term “entry point” as mentioned herein refers to the starting point for the wastewater in the system 100. The inlet unit 102 may be adapted to receive the wastewater. The inlet unit 102 may include a screen device 103 such that the wastewater is screened through the screen device 103 when the wastewater is loaded into the system 100.
In some embodiments, an operator of the system 100 may manually feed the wastewater into the system 100 by way of the inlet unit 102. In some embodiments, a feeder (not shown) may be adapted to automatically feed the wastewater into the system 100 by way of the inlet unit 102.
In some embodiments, the inlet unit 102 may be made up of material such as, but not limited to, plastic, stainless steel, galvanized steel, concrete, and the like. Embodiments of the present disclosure may intend to include and/or otherwise cover any type of known or later developed materials.
The oil skimmer 104 may be coupled to the inlet unit 102. Specifically, the oil skimmer 104 may be disposed downstream to the inlet unit 102. The oil skimmer 104 may receive the wastewater from the inlet unit 102 to remove oil from the wastewater. Specifically, the oil skimmer 104 may be adapted to remove oil that floats over surface of the wastewater. The oil skimmer 104 may include a skimming media (not shown) such that the skimming media facilitates in removal of oil from the surface of the wastewater. In some embodiments, the skimming media may be adapted to pass through the wastewater such that the oil adheres to the skimming media that separates the oil from the wastewater.
In some embodiments, the oil skimmer 104 may be, but is not limited, an oleophilic skimmer, a non-oleophilic skimmer, and the like. Embodiments of the present disclosure are intended to include and/or otherwise cover any type of oil skimmer, without deviating from the scope of the present disclosure.
In some embodiments, the skimming media may be, but not limited to, a belt, a tube, a rope, a mop, a disk, and the like. Embodiments of the present disclosure may intend to include or otherwise cover any type of skimming media that is capable of removing the floating oil that floats on the surface of the wastewater.
In some embodiments, the oil-skimmer 104 may be disposed below (i.e., downstream) the inlet unit 102 such that the wastewater flows from the inlet unit 102 to the oil-skimmer 104 by way of a gravitational force.
In some embodiments, the oil skimmer 104 may be made up of a material such as, but not limited to, plastic, stainless steel, galvanized steel, concrete, and the like. Embodiments of the present disclosure may intend to include and/or otherwise cover any type of known or later developed materials.
The bio-media tank 106 may be coupled to the oil skimmer 104. The bio-media tank 106 may be disposed downstream to the oil skimmer 104. Specifically, the oil skimmer 104 may be disposed downstream to the inlet unit 102 and upstream to the bio-media tank 106 such that the bio-media tank 106 receives wastewater from the oil skimmer 104.
The bio-media tank 106 may be adapted to hold bio-media 122. The bio-media 122 may be adapted to facilitate one of nitrification and partial denitrification of the wastewater.
The bio-media tank 106 may include an air diffuser 124 and a retainer plate 126. The air diffuser 124 may be adapted to provide oxygen in the bio-media tank 106 to facilitate biological degradation of pollutants present in the wastewater to convert the wastewater into biologically degraded water. Specifically, the air diffuser 124 may be adapted to transfer oxygen to micro-organisms that are present in the wastewater. The oxygen may facilitate the micro-organisms to break down pollutants present in the wastewater to convert the wastewater into the biologically degraded water. The retainer plate 126 may be adapted to prevent over-flow of the bio-media 122. Specifically, the retainer plate 126 may be adapted to prevent over-flow of the bio-media 122 while the bio-media tank 106 converts the wastewater into the biologically degraded water.
In some embodiments, the bio-media tank 106 may be disposed below (i.e., downstream) the oil-skimmer 104 such that the wastewater flows from the oil-skimmer 104 to the bio-media tank 106 by way of the gravitational force.
In some embodiments, the bio-media tank 106 may be made up of material such as, but not limited to, plastic, stainless steel, galvanized steel, concrete, and the like. Embodiments of the present disclosure may intend to include and/or otherwise cover any type of known or later developed materials.
In some embodiments, phase of the bio-media 122 may be solid.
In some embodiments, the bio-media 122 may exhibit micro-porous structure having a plurality of micro-pores. Diameter of each micro-pore of the plurality of micro-pores may lie in a range between 3 mm and 6 mm. Preferably, the diameter of each micro-pore of the plurality of micro-pores may be 4 mm.
In some embodiments, quantity of the bio-media 122 used in the bio-media tank 106 may lie in a range between 450 Kilograms and 550 Kilograms. Preferably, the quantity of the bio-media 122 used in the bio-media tank 106 may be 500 Kilograms.
In some embodiments, the bio-media 122 may be polyvinyl alcohol (PVA) gel.
In some embodiments, the retainer plate 126 may include a plurality of holes (not shown). The plurality of holes may exhibit fixed diameter values. In some examples, the plurality of holes may exhibit variable diameter values.
In some embodiments, volume of the wastewater held in the bio-media tank 106 may be 5 Kilo-litres. The anoxic tank 108 may be coupled to the bio-media tank 106. The anoxic tank 108 may be disposed downstream to the bio-media tank 106. Specifically, the bio-media tank 106 may be disposed downstream to the oil skimmer 104 and upstream to the anoxic tank 108 such that the anoxic tank 108 receives the biologically degraded water from the bio-media tank 106. The anoxic tank 108 may be adapted to denitrify the biologically degraded water to convert the biologically degraded water into denitrified water. The term “denitrification” as used herein the context of the present disclosure refers to conversion of ammonia present in the biologically degraded water into nitrogen.
In some embodiments, the anoxic tank 108 may include an agitator (not shown). The agitator may be adapted to stir the biologically degraded water to enhance denitrification of the biologically degraded water to convert the biologically degraded water into the denitrified water.
In some embodiments, the anoxic tank 108 may be disposed below (i.e., downstream) the bio-media tank 106 such that the biologically degraded water flows from the bio-media tank 106 to the anoxic tank 108 by way of the gravitational force.
In some embodiments, the anoxic tank 108 may be made up of material such as, but not limited to, plastic, stainless steel, galvanized steel, concrete, and the like. Embodiments of the present disclosure may intend to include and/or otherwise cover any type of known or later developed materials.
In some embodiments, volume of the biologically degraded water held in the anoxic tank 108 may be 5 Kilolitres.
The aeration tank 110 may be coupled to the anoxic tank 108. The aeration tank 110 may be disposed downstream to the anoxic tank 108. Specifically, the anoxic tank 108 may be disposed downstream to the bio-media tank 106 and upstream to the aeration tank 110 such that the aeration tank 110 receives the denitrified water from the anoxic tank 108. The aeration tank 110 may include a plurality of jet aerators 128 of which first and second jet aerators 128A and 128B are shown. The first and second jet aerators 128A and 128B may be adapted to provide air to the aeration tank 110. The air provided in the aeration tank 110 may be adapted to convert the denitrified water into aerated water. By virtue of the first and second jet aerators 128A and 128B, the denitrified water rapidly mixes with the incoming air that is provided by the first and second jet aerators 128A and 128B. The first and second jet aerators 128A and 128B may be adapted to rapidly lower one of a biochemical oxygen demand (BOD) value and a chemical oxygen demand value (COD) of the aerated water. Embodiments of the present disclosure may intend to include or otherwise cover any number of jet aerators without deviating from the scope of the present disclosure such that the number of jet aerators may serve one or more functionalities similar to the one or more functionalities being served by the first and second jet aerators 128A and 128B. The aeration tank 110 may further include a monitoring unit 130. The monitoring unit 130 may be disposed within the aeration tank 110. The monitoring unit 130 may include one or more circuitries that may perform one or more operations. For example, the monitoring unit 130 may be configured to determine one of, a biochemical oxygen demand (BOD) value of the aerated water and a chemical oxygen demand (COD) value of the aerated water. Specifically, the monitoring unit 130 may be configured to determine one of, the biochemical oxygen demand (BOD) value and the chemical oxygen demand (COD) value based on the quantity of pollutants that are left in the aerated water.
In some embodiments, the aeration tank 110 may be disposed below (i.e., downstream) the anoxic tank 108 such that the denitrified water flows from the anoxic tank to the aeration tank 110 by way of the gravitational force.
In some embodiments, the aeration tank 110 may be made up of material such as, but not limited to, plastic, stainless steel, galvanized steel, concrete, and the like. Embodiments of the present disclosure may intend to include and/or otherwise cover any type of known or later developed materials.
In some embodiments, volume of the denitrified water held in the aeration tank 110 may be 5 Kilolitres.
The membrane bio-reactor tank 112 may be coupled to the aeration tank 110. The membrane bio-reactor tank 112 may be disposed downstream to the aeration tank 110. Specifically, the aeration tank 110 may be disposed downstream to the anoxic tank 108 and upstream to the bio-reactor tank 112 such that the bio-reactor tank 112 receives the aerated water from the aeration tank 110. The membrane bio-reactor tank 112 may be adapted to hold a plurality of membranes 132 of which first and second membranes 132A and 132B are shown. The membrane-bioreactor tank 112 may be adapted to receive the aerated water from the aeration tank 110. The first and second membranes 132A and 132B of the membrane-bioreactor tank 112 may be adapted to remove organic and suspended wastes from the aerated water to convert the aerated water into treated water. Embodiments of the present disclosure may intend to include or otherwise cover any number of membranes without deviating from the scope of the present disclosure such that the number of membranes may serve one or more functionalities like the one or more functionalities being served by the first and second membranes 132A and 132B.
In some embodiments, size of pores of the first and second membranes 132A and 132B may be in a range of 0.3 microns and 0.5 microns. Preferably, the size of pores of the first and second membranes 132A and 132B may be 0.4 microns to provide high filtration efficiency.
In some embodiments, each membrane of the plurality of membranes 132 may be a flat-sheet or hollow fibre membranes. Specifically, the first and second membranes 132A and 132B may be a flat-sheet membrane. In some embodiments, the plurality of membranes 132 may be integrated with the aeration tank 110 to eliminate requirement of the membrane bio-reactor tank 112 which reduces the size of the system 100.
In some embodiments, the membrane-bioreactor tank 112 may be disposed below (i.e., downstream) the aeration tank 110 such that the aerated water flows from the aeration tank 110 to the membrane-bioreactor tank 112 by way of the gravitational force.
In some embodiments, the membrane-bioreactor tank 112 may be made up of material such as, but not limited to, plastic, stainless steel, galvanized steel, concrete, and the like. Embodiments of the present disclosure may intend to include and/or otherwise cover any type of known or later developed materials.
In some embodiments, volume of the aerated water held in the membrane bio-reactor tank 112 may be 2.5 Kilolitres.
The treated water tank 114 may be coupled to the bio-reactor tank 112. The treated water tank 114 may be disposed downstream to the membrane bio-reactor tank 112. Specifically, the bio-reactor tank 112 may be disposed downstream to the aeration tank 110 and upstream to the treated water tank 114 such that the treated water tank 114 receives the treated water from the membrane-bioreactor tank 112. The treated water tank 114 may be adapted to store the treated water for desired duration of time.
In some embodiments, the treated water tank 114 may be disposed below (i.e., downstream) the membrane-bioreactor tank 112 such that the treated water flows from the membrane-bioreactor tank 112 to the treated water tank 114 by way of the gravitational force.
In some embodiments, the treated water tank 114 may be made up of material such as, but not limited to, plastic, stainless steel, galvanized steel, concrete, and the like. Embodiments of the present disclosure may intend to include and/or otherwise cover any type of known or later developed materials.
The outlet unit 116 may be coupled to the treated water tank 114. The outlet unit 116 may be disposed downstream to the treated water tank 114. Specifically, the outlet unit 116 may be disposed at an exit point of the system 100. The term “exit point” as mentioned herein refers to the end point for the treated water from the system 100. The outlet unit 116 may include a plurality of valves 134 of which first and second valves 134A and 134B are shown. The outlet unit 116 may be adapted to receive the treated water from the treated water tank 114. The outlet unit 116 may be further adapted to discharge the treated water from the system 100. The first and second valves 134A and 134B may be adapted to regulate discharging of the treated water from the outlet unit 116. Specifically, the first and second valves 134A and 134B may facilitate discharging of the treated water from the outlet unit 116 as and when required. Embodiments of the present disclosure may intend to include or otherwise cover any number of valves without deviating from the scope of the present disclosure such that the number of valves may serve one or more functionalities similar to the one or more functionalities being served by the first and second valves 134A and 134B.
In some embodiments, the outlet unit 116 may be disposed below (i.e., downstream) the treated water tank 114 such that the treated water flows from the treated water tank 114 to the outlet unit 116 by way of the gravitational force.
In some embodiments, the outlet unit 116 may be made up of material such as, but not limited to, plastic, stainless steel, galvanized steel, concrete, and the like. Embodiments of the present disclosure may intend to include and/or otherwise cover any type of known or later developed materials.
In some embodiments, the system 100 may be remotely controlled by way of a remote-control device (not shown). The remote-control device may be adapted to manipulate one or more functionalities associated with the system 100 that customize or modifies the treatment of the wastewater.
In some embodiments, the system 100 may include a reverse-osmosis tank (not shown) that includes a plurality of reverse-osmosis (RO) membranes (not shown).
In some embodiments, the system 100 may be powered by a solar power generator (not shown). In some embodiments, the system 100 may further include an external means (not shown) such that the external means enables flow of the wastewater across various tanks and units of the system 100.
In some embodiments, the system 100 may be coupled to an internet of things (IoT) unit (not shown) to enable monitoring of the system 100.
In some embodiments, the system 100 may be an automatic system. The term “automatic system” as used herein refers to the system 100 that may be adapted to automatically perform one or more operations. For example, the wastewater may automatically flow across various tanks of the system 100.
In operation, the system 100 treats the wastewater by way of various tanks. The inlet unit 102 may be adapted to receive the wastewater. The oil skimmer 104 may be adapted to perform scrubbing of the wastewater. The bio-media tank 106 may be adapted to perform the one off, nitrification and the partial denitrification of the wastewater to convert the wastewater into the biologically degraded water. The anoxic tank 108 may be adapted to denitrify the biological degraded water to convert the biologically degraded water into the denitrified water. The first and second jet aerators 128A and 128B may be adapted to provide air in the aeration tank 110 to convert the denitrified water into the aerated water. The first and second membranes 132A and 132B of the membrane-bioreactor tank 112 may be adapted to remove the organic and suspended wastes from the aerated water to convert the aerated water into the treated water. The treated water tank 114 may be adapted to store the treated water for desired duration of time. The outlet unit 116 may be adapted to discharge the treated water from the system 100.
FIG. 2 illustrates a perspective view of a screen device 103 of the inlet unit 102 of the system 100 of FIG. 1, in accordance with an embodiment herein. The screen device 103 may include a plurality of screens 202 of which first and second screens 202A and 202B are shown in FIG. 2. The first and second screens 202A and 202B may be adapted to screen the wastewater. Specifically, the first and second screens 202A and 202B may facilitate loading of the wastewater into the inlet unit 102 while maintaining uniform velocity of the wastewater. The screen device 103 may further include a lid 204 and a plurality of guideways of which first and second guideways 206A and 206B are shown in FIG. 2.
In some embodiments, the first and second screens 202A and 202B may exhibit a curved bar design.
The first and second screens 202A and 202B may be stacked on one above the other, preferably, the first screen 202A may be stacked above the second screen 202B. Specifically, the first screen 202A may be slidably arranged on the first guideway 206A and the second screen 202B may be slidably arranged on the second guideway 206B.
In some embodiments, the first and second screens 202A and 202B may be removably arranged on the first and second guideways 206A and 206B, respectively. The removable arrangement of the first and second screens 202A and 202B allows efficient cleaning of the screen device 103. Specifically, the removable arrangement of the first and second screens 202A and 202B facilitates intermittent cleaning of the screen device 103, while the inlet unit 102 receives the wastewater.
The first screen 202A may include a first set of holes 208A-208N. The second screen 202B may include a second set of holes 210A-210N. The first set of holes 208A-208N may be adapted to screen coarser sized solid particles that are present in the wastewater. The second set of holes 210A-210N may be adapted to screen finer sized solid particles that are present in the wastewater.
In some embodiments, diameter of the first set of holes 208A-208N may be in a range of 5 milli-meter and 10 milli-meter. Preferably, the diameter of the first set of holes 208A-208N may be 8 milli-meter.
In some embodiments, diameter of the second set of holes 210A-210N may be in a range of 3 milli-meter and 7 milli-meter. Preferably, the diameter of the second set of holes 210A-210N may be 5 milli-meter.
The lid 204 may be adapted to exhibit a first position and a second position. The first position of the lid 204 may close the screen device 103 such that the first and second screens 202A and 202B are not accessible. The second position of the lid 204 may open the screen device 103. While loading the inlet unit 102 with the wastewater, the lid 204 may be moved to the second position such that the first and second screens 202A and 202B are accessible. Upon loading the wastewater into the inlet unit 102, the lid 204 may be moved to the first position to avoid entrainment of foreign matter into the inlet unit 102.
FIG. 3 illustrates a flowchart depicting a method 300 for treating the wastewater. The method 200 may include following steps for treatment of the wastewater: -
At step 302, the system 100 may be adapted to receive, by way of the inlet unit 102, the wastewater. The inlet unit 102 may be adapted to receive the wastewater. The first and second screens 202A and 202B of the screen device 103 may be adapted to screen the wastewater. Specifically, the first and second screens 202A and 202B may facilitate loading of the wastewater into the inlet unit 102 while maintaining uniform velocity of the wastewater. The first and second screens 202A and 202B may be stacked on one above the other, preferably, the first screen 202A may be stacked above the second screen 202B. Specifically, the first screen 202A may be slidably arranged on the first guideway 206A and the second screen 202B may be slidably arranged on the second guideway 206B. The first set of holes 208A-208N may be adapted to screen coarser sized solid particles that are present in the wastewater. The second set of holes 210A-210N may be adapted to screen finer sized solid particles that are present in the wastewater.
In some embodiments, the first and second screens 202A and 202B may exhibit a curved bar design.
In some embodiments, the first and second screens 202A and 202B may be removably arranged on the first and second guideways 206A and 206B, respectively. The removable arrangement of the first and second screens 202A and 202B allows efficient cleaning of the screen device 103. Specifically, the removable arrangement of the first and second screens 202A and 202B facilitates intermittent cleaning of the screen device 103, while the inlet unit 102 receives the wastewater.
In some embodiments, diameter of the first set of holes 208A-208N may be in a range of 5 milli-meter and 10 milli-meter. Preferably, the diameter of the first set of holes 208A-208N may be 8 milli-meter.
In some embodiments, diameter of the second set of holes 210A-210N may be in a range of 3 milli-meter and 7 milli-meter. Preferably, the diameter of the second set of holes 210A-210N may be 5 milli-meter.
At step 304, the system 100 may be adapted to remove, by way of the oil-skimmer 104, the oil from the wastewater. The oil skimmer 104 may be disposed downstream to the inlet unit 102 and upstream to the bio-media tank 106. The oil skimmer 104 may receive the wastewater from the inlet unit 102. The oil skimmer 104 may be adapted to remove oil from the wastewater. Specifically, the oil skimmer 104 may be adapted to remove oil that floats over surface of the wastewater. The oil skimmer 104 may include a skimming media (not shown) such that the skimming media removes oil from the surface of the wastewater. The skimming media may be adapted to pass through the wastewater such that the oil adheres to the skimming media, which separates the oil from the wastewater.
In some embodiments, the oil skimmer 104 may include, but is not limited to, an oleophilic skimmer, a non-oleophilic skimmer, and the like. Embodiments of the present disclosure are intended to include and/or otherwise cover any type of oil skimmer, without deviating from the scope of the present disclosure.
In some embodiments, the skimming media may include but is not limited to a belt, a tube, a rope, a mop, a disk, and the like. Embodiments of the present disclosure may intend to include or otherwise cover any type of skimming media that is capable of removing the floating oil that floats on the surface of the wastewater.
At step 306, the system 100 may be adapted to provide, by way of the air diffuser 124, oxygen in the bio-media tank 106 to convert the wastewater into the biologically degraded water. The bio-media tank 106 may be coupled to the oil skimmer 104. The bio-media tank 106 may be disposed downstream to the oil skimmer 104. Specifically, the oil skimmer 104 may be disposed downstream to the inlet unit 102 and upstream to the bio-media tank 106 such that the bio-media tank 106 receives wastewater from the oil skimmer 104. The bio-media 122 may be adapted to facilitate one of nitrification and partial denitrification of the wastewater. The air diffuser 124 may be adapted to transfer oxygen in the bio-media tank 106 to facilitate biological degradation of pollutants present in the wastewater to produce biologically degraded water. Specifically, the air diffuser 124 may be adapted to provide oxygen to micro-organisms that are present in the wastewater. The oxygen may facilitate the micro-organisms to break down pollutants present in the wastewater to produce the biologically degraded water. The retainer plate 126 may be adapted to prevent over-flow of the bio-media 122. Specifically, the retainer plate 126 may be adapted to prevent over-flow of the bio-media 122 while the bio-media tank 106 converts the wastewater into the biologically degraded water.
In some embodiments, the retainer plate 126 may include a plurality of holes (not shown). The plurality of holes may exhibit variable diameter values.
At step 308, the system 100 may be adapted to denitrify, by way of the anoxic tank 108, the biologically degraded water to convert the biologically degraded water into the denitrified water. The anoxic tank 108 may be coupled to the bio-media tank 106. The anoxic tank 108 may be disposed downstream to the bio-media tank 106. Specifically, the bio-media tank 106 may be disposed downstream to the oil skimmer 104 and upstream to the anoxic tank 108 such that the anoxic tank 108 receives the biologically degraded water from the bio-media tank 106. The anoxic tank 108 may be adapted to facilitate denitrification of the biologically degraded water to produce denitrified water.
At step 310, the system 100 may be adapted to provide, by way of the plurality of jet aerators 128, air to the aeration tank 110, to produce the aerated water. The aeration tank 110 may be coupled to the anoxic tank 108. The aeration tank 110 may be disposed downstream to the anoxic tank 108. Specifically, the anoxic tank 108 may be disposed downstream to the bio-media tank 106 and upstream to the aeration tank 110 such that the aeration tank 110 receives the denitrified water from the anoxic tank 108. The first and second jet aerators 128A and 128B may be adapted to provide air to the aeration tank 110. The air provided in the aeration tank 110 may be adapted to convert the denitrified water into aerated water. By virtue of the first and second jet aerators 128A and 128B, the denitrified water rapidly mixes with the incoming air that is provided by the first and second aerators 128A and 128B. The first and second jet aerators 128A and 128B may be adapted to rapidly lower one of a biochemical oxygen demand (BOD) value of the aerated water and a chemical oxygen demand value (COD) of the aerated water. The monitoring unit 130 may be adapted to determine one of a biochemical oxygen demand (BOD) value and a chemical oxygen demand value (COD) of the aerated water.
At step 312, the system 100 may be adapted to remove, by way of the plurality of membranes 132 of the membrane bio-reactor tank 112, the organic and suspended wastes from the aerated water to convert the aerated water into the treated water. The membrane bio-reactor tank 112 may be coupled to the aeration tank 110. The membrane bio-reactor tank 112 may be disposed downstream to the aeration tank 110. Specifically, the aeration tank 110 may be disposed downstream to the anoxic tank 108 and upstream to the bio-reactor tank 112 such that the bio-reactor tank 112 receives the aerated water from the aeration tank 110. The first and second membranes 132A and 132B of the membrane-bioreactor tank 112 may be adapted to remove organic and suspended wastes from the aerated water to produce treated water.
In some embodiments, size of pores of the first and second membranes 132A and 132B may be in a range of 0.3 microns and 0.5 microns. Preferably, the size of pores of the first and second membranes 132A and 132B may be 0.4 microns to provide high filtration efficiency.
At step 314, the system 100 may be adapted to store, by way of the treated water tank 114, the treated water. The treated water tank 114 may be coupled to the bio-reactor tank 112. The treated water tank 114 may be disposed downstream to the membrane bio-reactor tank 112. Specifically, the bio-reactor tank 112 may be disposed downstream to the aeration tank 110 and upstream to the treated water tank 114 such that the treated water tank 114 receives the treated water from the membrane-bioreactor tank 112. The treated water tank 114 may be further adapted to store the treated water for desired duration of time.
At step 316, the system 100 may be adapted to discharge, by way of the outlet unit 116, the treated water. The outlet unit 116 may be coupled to the treated water tank 114. The outlet unit 116 may be disposed downstream to the treated water tank 114 such that the outlet unit 116 receives the treated water from the treated water tank 114. The outlet unit 116 may be further adapted to discharge the treated water from the system 100. The first and second valves 134A and 134B may be adapted to regulate discharging of the treated water from the outlet unit 116. Specifically, the first and second valves 134A and 134B may facilitate discharging of the treated water from the outlet unit 116 as and when required.
Thus, the system 100 may provide following advantages that may be derived from the structural and functional aspects of the system 100: -
- The system 100 requires lesser time for treating wastewater. Specifically, the bio-media tank 106 requires 2 hours for producing the biologically degraded water. The anoxic tank 108 requires 2 hours for producing the denitrified water. The aeration tank 110 requires 2 hours for producing the aerated water. The membrane-bioreactor tank 112 requires 1 hour for producing treated water. The time duration in which the system 100 treats the wastewater is far less than the conventional wastewater treatment systems, which require 18-24 hours for treating the wastewater.
- The system 100 exhibits a compact and modular design that allows the wastewater treatment system 100 to be moved from one place to another. Further, the modular design of the wastewater treatment system 100 facilitates easy assembly and disassembly of the system 100.
- The system 100 has low sludge yield rates.
- Various tanks of the system 100 are designed such that the system 100 exhibits compact size and utilizes less space. For example, dimensions of the bio-media tank 106, the anoxic tank 108, the aeration tank 110, and the membrane-bioreactor tank 112 are such that the bio-media tank 106 requires 2 hours, the anoxic tank 108 requires 2 hours, the aeration tank 110 requires 2 hours, and the membrane-bioreactor tank 112 requires 1 hour for treating the wastewater.
- The system 100 facilitates partial nitrification and denitrification of the wastewater by the bio-media tank 106. The bio-media tank 106 therefore executes two difference processes in a single step.
- Various tanks of the system 100 are easily coupled to each other by way of plug-in and plug-out connections.
- The system 100 allows to add or remove any of the tank based on the requirements and thereby providing flexibility to the system 100.
- The system 100 increases the loading capacity of wastewater into the system 100. Approximately, double quantity of wastewater is loaded into the system 100 compared to the loading capacity of the conventional wastewater treatment system.
- Integration of bio-media tank 106 with membrane-bioreactor tanks 112 increases the treatment efficiency of the system 100. The bio-media 122 and the first and second membranes 132A and 132B proves an efficient combination in treating wastewater.
- The system 100 is adapted to work under different working temperature ranges. Preferably, the system 100 is capable of working under temperature between 0 and 40 degrees Celsius.
- The system 100 has less sludge handling requirements.
- The internet of things (IoT) unit enables monitoring of the system 100.
- The system 100 is an automatic system that facilitates easier treatment of the wastewater.
- The system 100 is designed such that the system 100 is capable of working under variable organic loads i.e., within 350 milli-grams per liter mg/l and 1000 milli-grams per liter mg/l of BOD value and within 700 milli-grams per liter and 1500 milli-grams per liter of COD value.
- The cost associated in maintenance of the system 100 is very minimal.
The foregoing discussion of the present disclosure has been presented for purposes of illustration and description. It is not intended to limit the present disclosure to the form or forms disclosed herein. In the foregoing Detailed Description, for example, various features of the present disclosure are grouped together in one or more aspects, configurations, or aspects for the purpose of streamlining the disclosure. The features of the aspects, configurations, or aspects may be combined in alternate aspects, configurations, or aspects other than those discussed above. This method of disclosure is not to be interpreted as reflecting an intention the present disclosure requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed aspect, configuration, or aspect. Thus, the following claims are hereby incorporated into this Detailed Description, with each claim standing on its own as a separate aspect of the present disclosure.
Moreover, though the description of the present disclosure has included description of one or more aspects, configurations, or aspects and certain variations and modifications, other variations, combinations, and modifications are within the scope of the present disclosure, e.g., as may be within the skill and knowledge of those in the art, after understanding the present disclosure. It is intended to obtain rights which include alternative aspects, configurations, or aspects to the extent permitted, including alternate, interchangeable and/or equivalent structures, functions, ranges or steps to those claimed, whether or not such alternate, interchangeable and/or equivalent structures, functions, ranges or steps are disclosed herein, and without intending to publicly dedicate any patentable subject matter. ,CLAIMS:We Claim(s):
1. A wastewater treatment system (100) comprising:
an inlet unit (102) adapted to receive wastewater;
a bio-media tank (106) adapted to hold bio-media (122) such that the bio-media tank (106) is disposed downstream to the inlet unit (102), the bio-media (122) facilitates in one of, nitrification and partial denitrification of the wastewater, wherein the bio-media tank (106) comprising an air diffuser (124) to transfer oxygen in the bio-media tank (106) for biological degradation of pollutants in the wastewater to convert the wastewater into biologically degraded water; and
an aeration tank (110) that is coupled to the bio-media tank (106), wherein the aeration tank (110) comprising a plurality of jet aerators (128A and 128B) that are adapted to provide air to the aeration tank (110) to produce aerated water; and
a membrane-bioreactor tank (112) disposed downstream to the bio-media tank (106) and the aeration tank (110) and adapted to hold a plurality of membranes (132) that are adapted to remove organic and suspended wastes from the aerated water to convert the aerated water into treated water.

2. The wastewater treatment system (100) as claimed in claim 1, further comprising an anoxic tank (108) that is disposed downstream to the bio-media tank (106) and upstream to the aeration tank (110), wherein the anoxic tank (108) is adapted to denitrify the biologically degraded water to convert the biologically degraded water into denitrified water.

3. The wastewater treatment system (100) as claimed in claim 1, wherein the aeration tank (110) further comprising:
a monitoring unit (130) disposed within the aeration tank (110) and configured to determine one of, a biochemical oxygen demand (BOD) value of the aerated water and a chemical oxygen demand (COD) value of the aerated water.

4. The wastewater treatment system (100) as claimed in claim 1, further comprising:
a treated water tank (114) that is disposed downstream to the membrane-bioreactor tank (112) and adapted to store the treated water; and
an outlet unit (116) that is disposed downstream to the treated water tank (114) and adapted to discharge the treated water.

5. The wastewater treatment system (100) as claimed in claim 1, further comprising an oil skimmer (104) that is disposed downstream to the inlet unit (102) and upstream to the bio-media tank (106) and adapted to remove oil from the wastewater.

6. The wastewater treatment system (100) as claimed in claim 1, wherein the inlet unit (102) further comprising a screen device (103) with a plurality of screens (202) that facilitates loading of the wastewater into the inlet unit (102) while maintaining uniform velocity of the wastewater.

7. The wastewater treatment system (100) as claimed in claim 1, wherein the bio-media tank (106) further comprising a retainer plate (126) that is adapted to prevent over-flow of the bio-media (122) while the bio-media tank (106) converts the wastewater into the biologically degraded water.

8. The wastewater treatment system (100) as claimed in claim 1, wherein each membrane of the plurality of membranes (132) is a flat sheet membrane adapted to remove organic and suspended wastes from the aerated water.

9. A method (300) for treating wastewater, the method (300) comprising:
receiving (302), by way of an inlet unit (102), the wastewater;
providing (306), by way of an air diffuser (124), oxygen in a bio-media tank (106) disposed downstream to the inlet unit (102), for biological degradation of pollutants in the wastewater to convert the wastewater into biologically degraded water;
providing (310), by way of a plurality of jet aerators (128), air to an aeration tank (110) coupled to the bio-media tank (106), to produce aerated water;
removing (312), by way of a plurality of membranes (132) of a membrane-bioreactor tank (112) disposed downstream to the bio-media tank (106) and the aeration tank (110), organic and suspended wastes from the aerated water to convert the aerated water into treated water.

10. The method (300) as claimed in claim 9, further comprising:
denitrifying (308), by way of an anoxic tank (108) disposed downstream to the bio-media tank (106) and upstream to the aeration tank (110), denitrification of the biologically degraded water to convert the biologically degraded water into denitrified water.