Biodrum based moving bed bioreactor sewage treatment system

Abstract

The present invention describes a biodrum advanced moving drum bioreactor (MBBR) sewerage treatment system for treating sewerage by fixed film process. The system includes a first tank, a first pump, a biodrum unit, a feed blower and a second tank. The biodrum unit includes an outer box having funnel, round, square, circular, triangular or polygonal shape cross-section passages having a carrier medium to treat the sewerage. The biodrum unit distributes sewerage evenly to increase the treatment efficiency of the unit. The space in the passages of the box is used to place the carrier medium and treat the sewerage. The sewerage treatment system and method reduce the high cost of erection, operation and maintenance required for treatment of sewerage.

Description

[0001] “BIODRUM ADVANCED MOVING BED BIOREACTOR SEWERAGE

[0002] TREATMENT SYSTEM”

[0003] The present patent application has a reference to an Indian Patent Application numbered 202121032883 filed on 21stJuly 2021. The present invention is an improvement or modification of the invention claimed in specification for Patent Application No.202121032883.

[0004] FIELD OF THE INVENTION:

[0005] The present invention relates to sewerage treatment system, and more particularly to a biodrum advanced moving bed bioreactor sewerage treatment system.

[0006] BACKGROUND OF THE INVENTION:

[0007] The sewerage generated from various sources poses a significant threat to the environment by polluting the raw water sources if not treated effectively at the point of discharge. The principal objective of sewerage treatment is to allow human and industrial effluents to be disposed of safely, without endangering human health or causing irreparable damage to the natural environment.

[0008] Irrigation of the cultivated land using the treated sewerage serves a dual purpose of disposal and utilization, making it an effective form of sewage disposal, particularly through slow-rate land treatment. However, before the raw municipal sewage can be utilized for agricultural irrigation, landscape irrigation or for aquaculture, it typically requires a certain degree of treatment.

[0009] The quality of treated effluent used in agriculture significantly influences the operation and performance of the sewage-soil-plant or aquaculture systems. For irrigation purposes, the required quality of effluent depends on various factors including the type of crops to be irrigated, soil conditions, and the effluent distribution system adopted. By implementing crop restrictions and selecting irrigation systems that minimize health risks, the extent of pre-application sewage treatment can be reduced.

[0010] There are various methods to treat sewerage using a combination of physical, chemical and biological treatment processes. The conventional treatment includes subjecting the sewerage to physical pre-treatment and then to biological one. The conventional aerobic and anaerobic processes are very common for municipal sewerage treatment, and they are considered effective technical solutions for environmental protection in terms of construction and operational costs for large units. However, when it is not possible to design a central treatment unit but many smaller ones, conventional systems are not the most appropriate choice.

[0011] The domestic sewerage treatment systems where smaller volumes of sewerage are treated, use various types of tanks for treatment operations. In these systems, the carrier materials are placed in the tank. Since the surface area of the media affects the efficiency of the treatment process, large tanks are required that leads to great space and volume requirement. Further it is difficult to transport, install or to perform the maintenance of the tanks. Besides, the tank cannot be replaced whenever the volume of sewerage to be treated changes.

[0012] The PCT application WO2012133739A1 to Nishikawa Nobuhiko teaches a sewerage clarification facility having biological treatment section, a carrier, a filter tank and a control device to control the carrier cleaning operation. The Japanese patent application JPH02229594A to Takeishi Kazuo and others teaches a method for water treatment by minimizing the waste of oxygen or air and using required amount of oxygen for bioreaction. The prior art provides alternative mechanisms for treatment of sewerage, however, none addresses the problem of high production cost and large area requirement with consistent efficiency.

[0013] Therefore, there is still a need of a sewerage treatment system that is space efficient, having low production and operation cost and providing high performance treatment.

[0014] SUMMARY OF THE INVENTION:

[0015] The present invention discloses a biodrum advanced moving bed bioreactor (MBBR) sewerage treatment system 100. The said sewerage treatment system 100 includes a first tank 104, a first pump 108, a biodrum unit 112, a feed blower 116, a second tank 120, a second pump 124, a first filter 128, a second filter 132, a disinfection unit 136 and a third tank 140.

[0016] The first tank 104 is a raw sewage or waste water tank and the second tank 120 is a filter feed tank. The first pump 108 is a feed pump and the second pump 124 is a filter feed pump. The first filter 128 is a pressure sand filter and the second filter 132 is an activated carbon filter. The disinfection unit 136 is selected from an ultraviolet unit, a high temperature treatment unit and the like. The third tank 140 is a treated water tank.

[0017] The raw sewage or wastewater in accordance with the present invention is collected and stored in the raw sewage / wastewater tank 104. The feed pump 108 pumps the raw sewerage from the wastewater tank 104 to the biodrum unit 112. The biodrum unit feed blowers or venturi 116 provides aeration for supplying oxygen to bacteria. The biodrum unit 112 cleans the sewerage by a fixed film process. The treated discharge from the biodrum unit 112 is collected in the filter feed tank 120.

[0018] The treated discharge from the filter feed tank is pumped by the filter feed pump 124 to the pressure sand filter 128. The pressure sand filter 128 further filters the discharge under pressure to remove any remnant impurities. The activated carbon filter 132 adsorbs further impurities from the said discharge. The disinfection unit 136 eliminates the microbial contaminants from the discharge. The treated water tank 140 stores the discharge before release into the water body.

[0019] The biodrum unit 112 in accordance with the present invention includes an inlet 204, a distribution system 208, a carrier medium 212, an outer box 216, an outlet 220 and a plurality of entry passages. The cross-sectional passages and the distribution system 208 together forms a biodrum module 224. The sewerage received from the raw sewage / wastewater tank 104 enters the biodrum unit 112 through an inlet 204. The sewerage flows through the outer box 216, and the plurality of entry passages are configured for admitting the sewerage to the outer box 216.

[0020] The distribution system 208 distributes the sewerage evenly within the carrier medium 212 placed in the cross-section passages formed in the outer box 216 for treating the sewerage. The sewerage passes through the carrier medium 212; and after treatment, the clean sewerage comes out of the biodrum module 224 through the outlet passage 220.

[0021] The outer box 216 of the biodrum unit 112 is selected from rectangular, triangular, round, or polygonal shape. The inlet 204 having a cross-sectional shape is selected from rectangular, triangular, round, funnel, triangle or polygons. The sewerage path between the inlet 204 and outlet 220 is selected from straight, rolled, twisted, coiled, up and down, or zigzag shaped path.

[0022] The biodrum module in accordance with the present invention is selected from a funnel shaped biodrum module, a round or square shape biodrum module, half triangle shape biodrum module, straight channel shape biodrum module, and a hexagonal shape biodrum module.

[0023] BRIEF DESCRIPTION OF DRAWINGS:

[0024] The objectives and advantages of the present invention will become apparent from the following description read in accordance with the accompanying drawings wherein,

[0025] FIG. 1 shows a biodrum advanced moving bed bioreactor sewerage treatment system 100 in accordance with the present invention; FIG 2A shows a schematic isometric arrangement of the funnel shaped biodrum unit 112 in accordance with the present invention;

[0026] FIG 2B shows a schematic top view arrangement of the biodrum unit 112 in accordance with the present invention;

[0027] FIG 3A shows a schematic isometric view of the arrangement of the round or square shape small biodrum module 224 arranged in parallel manner with straight sewerage path in accordance with the present invention;

[0028] FIG 3B shows a schematic top view of the arrangement of the round or square shape small biodrum module 224 arranged in parallel manner with straight sewerage path in accordance with the present invention;

[0029] FIG 4A shows a schematic isometric view of the arrangement of the round or square shape biodrum module 224 with zigzag or up and down sewerage path in accordance with the present invention;

[0030] FIG 4B shows a schematic top view top view of the arrangement of the round or square shape biodrum module 224 with zigzag or up and down sewerage path in accordance with the present invention;

[0031] FIG 5A shows a schematic isometric arrangement of the square shape biodrum modules 224 square shape biodrum module with proper distribution system with straight sewerage path in accordance with the present invention;

[0032] FIG 5B shows a schematic section side view of the square shape biodrum modules 224 square shape biodrum module with proper distribution system with straight sewerage path in accordance with the present invention; FIG 6 A shows a schematic isometric arrangement of the square shape biodrum module 224 with proper distribution system with coiled or rolled sewerage path in accordance with the present invention;

[0033] FIG 6B shows a schematic top view arrangement of the square shape biodrum module 224 with proper distribution system with coiled or rolled sewerage path in accordance with the present invention;

[0034] FIG 7A shows a schematic isometric arrangement of the round shape biodrum module 224 with proper distribution system with twisted or zigzag sewerage path in accordance with the present invention;

[0035] FIG 7B shows a schematic sectional top view arrangement of the round shape biodrum module 224 with proper distribution system with twisted or zigzag sewerage path in accordance with the present invention;

[0036] FIG 8A shows a schematic isometric arrangement of the round shape biodrum module 224 with rolled sewerage path in accordance with the present invention;

[0037] FIG 8B shows a schematic side view of the round shape biodrum module 224 with coiled sewerage path in accordance with the present invention;

[0038] FIG 9A shows a schematic isometric arrangement of the hexagonal shape biodrum module 224 with straight sewerage path in accordance with the present invention;

[0039] FIG 9B shows a schematic top view of the hexagonal shape biodrum module 224 with straight sewerage path in accordance with the present invention; FIG 10A shows a schematic isometric arrangement of the tray or half bowl shape biodrum module 224 with half round sewerage path in accordance with the present invention;

[0040] FIG 10B shows a schematic side view of the tray or half bowl shape biodrum module 224 with half round sewerage path in accordance with the present invention;

[0041] FIG 11 shows a schematic isometric arrangement of the half triangle shape biodrum module 224 with a straight sewerage path in accordance with the present invention; and

[0042] FIG 12 shows a schematic isometric arrangement of the straight channel shape biodrum module 224 with straight sewerage path in accordance with the present invention.

[0043] DESCRIPTION OF THE INVENTION:

[0044] References in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, characteristic, or function described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment.

[0045] References in the specification to “preferred embodiment” means that a particular feature, structure, characteristic, or function described in detail thereby omitting known constructions and functions for clear description of the present invention.

[0046] The foregoing description of specific embodiments of the present invention has been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed and obviously many modifications and variations are possible in light of the above teaching.

[0047] In general aspect, the present invention teaches a system for treating sewerage by a moving bed bioreactor (MBBR). The sewerage treatment system reduces environmental pollution with high efficiency compared with current wastewater treatment technologies. The advanced moving bed bioreactor sewerage treatment system includes a biodrum unit through which the sewerage water is being passed for its treatment.

[0048] The sewerage treatment system has a biodrum unit that includes an outer box having funnel or round or square or circular or triangular or polygonal shape cross-section passages having a carrier medium to treat sewerage. The unit distribute sewerage evenly to increase the treatment efficiency of the unit. The space in the passages of the box is used to place the carrier medium and treat the sewerage. The natural air or external air supply is utilized for the aeration purpose in case of this unit.

[0049] Referring to FIG. 1, a biodrum advanced moving bed bioreactor (MBBR) sewerage treatment system 100 in accordance with the preset invention is described. Accordingly, the system 100 includes a first tank 104, a first pump 108, a biodrum unit 112, a feed blower 116 and a second tank 120. The first tank 104 is a raw sewage or wastewater tank. The first pump 108 is a feed pump selected from centrifugal pump, diaphragm pump and the like. The feed blower 116 is a biodrum unit feed blower or venturi. The second tank 120 is a filter feed tank.

[0050] The system 100 further includes a second pump 124, a first filter 128, a second filter 132, a disinfection unit 136 and a third tank 140. The second pump 124 is a filter feed pump. The first filter 128 is a pressure sand filter. The second filter 132 is an activated carbon filter. The disinfection unit 136 is selected from an ultraviolet unit, a high temperature treatment unit and the like. The third tank 140 is a treated water tank.

[0051] Now the working of the system 100 in accordance with the present invention is described. The raw sewage or wastewater is collected and stored in the first tank 104 that is a raw sewage / wastewater tank. The feed pump 108 pumps the raw sewerage from the first tank 104 to the biodrum unit 112. The biodrum unit feed blowers or the venturi 116 performs the function of aeration or supplying oxygen to aerobic organisms growing on the carrier medium in the biodrum unit. The biodrum unit 112 cleans the sewerage by a fixed film process. The treated discharge from the biodrum unit 112 is collected in the second tank 120 that is the filter feed tank.

[0052] The treated discharge from the filter feed tank is pumped by the second pump 124 that is the filter feed pump to the first filter 128. The first filter 128 is a pressure sand filter that further filters the discharge under a pressure of 2.5 - 3 bar to remove any remnant impurities. The discharge is then conveyed from the first filter 128 to the second filter 132. The second filter 132 is an activated carbon filter that adsorbs further impurities from the said discharge.

[0053] The discharge is further conveyed to a disinfection unit 136 for eliminating any microbial contaminants from the discharge. The disinfection unit 136 in accordance with the preferred embodiment is an ultraviolet unit that employs nonionizing radiation such as ultraviolet (UV) light for disinfection. The discharge from the disinfection unit 136 is further conveyed to the third tank 140 that is the treated water tank where it is stored before release into the water body.

[0054] Now referring to FIGS. 2A-2B, the biodrum unit 112 in accordance with the present invention is described. The biodrum unit 112 further includes an inlet 204, a distribution system 208, a carrier medium 212, an outer box 216 and an outlet 220.

[0055] The inlet (204) has a cross-sectional shape selected from rectangular, triangular, round, or polygons. The biodrum unit 112 includes at least one outer box 216. The outer box 216 is selected from but not limited to rectangular, triangular, round, or polygonal shape. The outer box 216 forms a cross-sectional passage of various shapes including, but not limited to a rectangular, triangular, polygonal, funnel or round shape. The carrier medium 212 is placed in the crosssection passage in the outer box 216. The cross-sectional passage and the distribution system together forms a biodrum module 224. A plurality of entry passages is configured in the unit. Further the biodrum unit 112 includes a natural air or external air supply inlet. The sewerage path between the inlet 204 and outlet 220 is selected from a straight, rolled, twisted, coiled, up and down, or zigzag shape.

[0056] The cross-sectional passage in accordance with FIG 2A and 2B is a funnel shaped passage. Accordingly, FIG. 2A and 2B illustrates an embodiment having a funnel shaped biodrum module 224 with proper distribution system for the sewerage for even distribution of the sewerage and with a straight sewerage path in accordance with the present invention.

[0057] In an alternate embodiment, referring to FIGS. 3 A - 3B, the biodrum unit 112 includes a round or square shape small biodrum module 224 arranged in a parallel manner with a straight sewerage path.

[0058] In another embodiment, referring to FIGS. 4 A - 4B, the biodrum unit 112 includes a round or square shape biodrum module 224 arranged in a zigzag or up and down sewerage path.

[0059] In yet other embodiment, referring to FIGS. 5A - 5B, the biodrum unit 112 includes square shape biodrum module 224 with a straight sewerage path.

[0060] In an alternate embodiment, referring to FIGS. 6 A - 6B, the biodrum unit 112 includes square shape biodrum module 224 with a coiled or rolled sewerage path.

[0061] In another embodiment, referring to FIGS. 7 A - 7B, the biodrum unit 112 includes round shape biodrum module 224 with a twisted or zigzag sewerage path.

[0062] In yet another embodiment, referring to FIGS. 8A - 8B, the biodrum unit 112 includes round shape biodrum module 224 with coiled sewerage path. In another embodiment, referring to FIGS. 9 A - 9B, the biodrum unit 112 includes hexagonal shape biodrum module 224 with straight sewerage path.

[0063] In another embodiment, referring to FIGS. 10A - 10B, the biodrum unit 112 includes half bowl or pot shape biodrum module 224 with a half round sewerage path.

[0064] In another embodiment, referring to FIG. 11, the biodrum unit 112 includes half triangle shape biodrum module 224 with a straight sewerage path.

[0065] In another embodiment, referring to FIG. 12, the biodrum unit 112 includes straight channel shape biodrum module 224 with a straight sewerage path.

[0066] Now the working of the biodrum unit 112 in accordance with the present invention is described. The sewerage received from the first tank 104 that is a raw sewage / wastewater tank enters the biodrum unit 112 through an inlet 204. The sewerage flows through the outer box 216. A plurality of entry passages is configured for admitting the sewerage to the outer box 216.

[0067] Further the distribution system 208 distributes the sewerage evenly within the carrier medium 212 placed in the cross-section passages formed in the outer box 216 for treating the sewerage. The distribution system 208 increases the treatment efficiency of the biodrum module 224. The sewerage passes through the carrier medium 212 that houses aerobic organisms for the treatment; and after treatment the clean sewerage comes out of the biodrum module 224 through the outlet passage 220. Further, the natural air or external air supply inlet provides aeration to the biodrum unit 112.

[0068] A comparison of the theoretical parameters between the various conventional sewerage treatment systems and the sewerage treatment system in accordance with the present invention is described in Table 1 below:

[0069] Table 1: Comparison of the theoretical parameters between the various conventional sewerage treatment systems and the sewerage treatment system of the present invention

[0070] Advantageously, the biodrum advanced moving bed bioreactor sewerage treatment system and method of the present invention reduces the high cost of erection, operation and maintenance required for treatment of sewerage. The system reduces significant space consumption; the compact sewerage treatment unit reduces the area losses. The system consumes much less electricity compared with current treatment technologies. It is user friendly at varying conditions and increases the efficiency of the biodrum unit by providing a distribution system to distribute sewerage evenly in the system. Further, the system and the method reduce environmental pollution with high efficiency compared with current sewerage treatment technologies. The embodiments were chosen and described in order to best explain the principles of the present invention and its practical application, to thereby enable others, skilled in the art to best utilize the present invention and various embodiments with various modifications as are suited to the particular use contemplated.

[0071] It is understood that various omission and substitutions of equivalents are contemplated as circumstance may suggest or render expedient, but such are intended to cover the application or implementation without departing from the scope of the present invention.

Claims

CLAIMS:

1. A biodrum advanced moving bed bioreactor (MBBR) sewerage treatment system 100 comprising a first tank 104, a first pump 108, a biodrum unit 112, a feed blower 116, a second tank 120, a second pump 124, a first filter 128, a second filter 132, a disinfection unit 136 and a third tank 140, such that the first tank 104 being a raw sewage or wastewater tank, the first pump 108 being a feed pump, the second tank 120 being a filter feed tank, the second pump 124 being a filter feed pump, the first filter 128 being a pressure sand filter, the second filter 132 being an activated carbon filter, the disinfection unit 136 being selected from an ultraviolet unit, a high temperature treatment unit and the like, the third tank 140 being a treated water tank; and wherein the raw sewage or wastewater being collected and stored in the raw sewage / wastewater tank 104; the feed pump 108 pumping the raw sewerage from the wastewater tank 104 to the biodrum unit 112; the biodrum unit feed blowers or venturi 116 aerating or supplying oxygen to bacteria; the biodrum unit 112 cleaning the sewerage by a fixed film process; the treated discharge from the biodrum unit 112 being collected in the filter feed tank 120; the treated discharge from the filter feed tank being pumped by the filter feed pump 124 to the pressure sand filter 128;the pressure sand filter 128 further filtering the discharge under pressure to remove any remnant impurities; the activated carbon filter 132 adsorbing further impurities from the said discharge; the disinfection unit 136 eliminating the microbial contaminants from the discharge; the treated water tank 140 storing the discharge before release into the water body.

2. The sewerage treatment system 100 as claimed in Claim 1 wherein the biodrum unit 112 including an inlet 204, a distribution system 208, a carrier medium 212, an outer box 216, an outlet 220 and a plurality of entry passages; such that cross-sectional passages and the distribution system 208 together forming a biodrum module 224.

3. The sewerage treatment system 100 as claimed in Claim 1 wherein the sewerage received from the raw sewage / wastewater tank 104 entering the biodrum unit 112 through an inlet 204; the sewerage flowing through the outer box 216; the plurality of entry passages being configured for admitting the sewerage to the outer box 216; the distribution system 208 distributing the sewerage evenly within the carrier medium 212 placed in the cross-section passages formed in the outer box 216 for treating the sewerage; the sewerage passing through the carrier medium 212; and after treatment, the clean sewerage coming out of the biodrum module 224 through the outlet passage 220.

4. The sewerage treatment system 100 as claimed in Claim 1, wherein the outer box 216 being selected from rectangular, triangular, round, or polygonal shape.

5. The sewerage treatment system 100 as claimed in Claim 1, wherein the inlet having a cross-sectional shape being selected from rectangular, triangular, round, funnel, triangle or polygons.

6. The sewerage treatment system 100 as claimed in Claim 1, wherein the sewerage path between the inlet 204 and outlet 220 being selected from straight, rolled, twisted, coiled, up and down, or zigzag shaped path.

7. The sewerage treatment system 100 as claimed in Claim 1, wherein the biodrum module being selected from a funnel shaped biodrum module, a round or square shape biodrum module, half triangle shape biodrum module, straight channel shape biodrum module, and a hexagonal shape biodrum module.

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