CN114702209A - MFBR sewage treatment device and sewage treatment method - Google Patents

MFBR sewage treatment device and sewage treatment method Download PDF

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Publication number
CN114702209A
CN114702209A CN202210534688.6A CN202210534688A CN114702209A CN 114702209 A CN114702209 A CN 114702209A CN 202210534688 A CN202210534688 A CN 202210534688A CN 114702209 A CN114702209 A CN 114702209A
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China
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mfbr
sewage treatment
zone
biological
water
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韦兵
朱健
施志德
王锐
喻国良
赵洪启
刘惠杰
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention provides an MFBR sewage treatment device and a sewage treatment method, wherein the device comprises an MFBR reaction tank, biological fillers are filled in the MFBR reaction tank, one end of the MFBR reaction tank is provided with a water inlet, the other end of the MFBR reaction tank is provided with a water outlet, the MFBR reaction tank is sequentially divided into a first-order degradation area, a relay grading area and a second-order degradation area along the direction from the water inlet to the water outlet, and the relay grading area is respectively communicated with the first-order degradation area and the second-order degradation area; the first-order degradation area is used for degrading COD, and the relay grading area is used for screening and grading microorganisms to culture microorganisms suitable for each stage; the second-order degradation area is used for degrading ammonia nitrogen; the method uses the MFBR sewage treatment plant for sewage treatment. The invention can be used for the treatment of industrial wastewater and the upgrading and reconstruction of sewage treatment plants, and has the advantages of economy, energy conservation, low capital investment and operating cost, good sewage treatment effect, high sewage treatment efficiency, simple and easy treatment process and the like.

Description

MFBR sewage treatment device and sewage treatment method
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an MFBR sewage treatment device and a sewage treatment method.
Background
With the improvement of the economic development level of China and the quality of life of people, the requirements on the ecological environment are increasingly increased. Municipal sewage treatment plants are also becoming increasingly stringent in emission standards as the primary treatment site for domestic sewage and some industrial wastewater. The core indexes of the pollutant discharge standard of the earliest national-level municipal sewage treatment plant in China (1988) are COD and BOD5And SS; in 2006, the national environmental protection agency enforces a first-level A standard in the Taihu lake basin; after the development of over ten years, the first-class A standard cannot meet the actual requirements of some places, and more strict standards are developed in succession in Beijing, Tianjin and the like. In the whole view, the emission standard is increasingly strict, not only the core index is increased, but also the emission standard value is increasingly strict. Therefore, a novel sewage treatment device and a novel sewage treatment process are needed to be adopted to improve the sewage treatment capacity, meet increasingly strict sewage treatment indexes and achieve the purpose of upgrading and reconstructing a sewage treatment plant.
The biological water treatment process is a common process for treating municipal sewage and comprises an activated sludge process and a biofilm reactor process. In the common activated sludge process, because the secondary sedimentation tank and the effluent water quality index are limited, the sludge concentration can not be continuously improved any more, so that a large water tank needs to be built in the design, the civil engineering investment is directly increased, the occupied area is increased, and in some existing built sewage treatment plants, because the land is limited, the expansion can not be realized, and in the face of increasingly improved discharge standards, the existing land can only be used for upgrading and reconstructing, and the only choice is to increase the concentration of microorganisms in unit volume to improve the treatment efficiency; although the biofilm reactor process has been applied to a certain degree of engineering in the treatment of municipal sewage and industrial wastewater, the research and application in China are still in the beginning stage, the development of a bioreactor compatible with multiple functions is to be further enhanced, and the combination with other treatment processes needs to be deeply researched. Therefore, it is necessary to develop a novel Multi-Functional Biological Reactor (MFBR) capable of combining the advantages of the activated sludge process and the biofilm Reactor process.
Through retrieval, the Chinese patent with the application publication number of CN110436703A discloses an MFBR sewage treatment device, which comprises a treatment cylinder, wherein the treatment cylinder is internally divided into a regulation area, an intermediate reaction area, an MFBR reaction area and a precipitation separation area; the MFBR reaction zone is divided into a fluidized bed aerobic zone and a fixed bed aerobic zone, the fluidized bed aerobic zone and the fixed bed aerobic zone are communicated through water passing holes formed in the bottom, fluidized fillers and fixed fillers are respectively arranged in the fluidized bed aerobic zone and the fixed bed aerobic zone through grid baskets, and an aeration pipe is arranged at the bottom of the MFBR reaction zone; the precipitation separation area is internally provided with a gas stripping device, the liquid outlet end of the gas stripping device is communicated with the middle reaction area through a return pipe, and the gas stripping device and the aeration pipe provide a gas source through a gas pump. The main disadvantages of the invention are: (1) the microorganism is not considered to be classified and screened, and the microorganism suitable for each stage is cultured; (2) the phenomenon of insufficient fluidization can exist by arranging the fluidized filler and the fixed filler through the grid basket; (3) the problems of interception and blockage of the packing when sewage flows between different zones are not considered.
In addition, the Chinese utility model with the publication number of CN211056798U discloses a concentric sleeve type MFBR rural sewage treatment device, which comprises a treatment barrel, wherein the treatment barrel is internally divided into a concentric regulation area, a middle reaction area and an outer ring area; the intermediate reaction zone is divided into an anaerobic zone and an anoxic zone, the adjusting zone is communicated with the anoxic zone through a first water through hole, the adjusting zone is communicated with the anaerobic zone through a second water through hole, and the anaerobic zone is communicated with the anoxic zone through a third water through hole; the outer ring area is divided into an MFBR reaction area, a sedimentation area and a clear water area, the anaerobic area is communicated with the MFBR reaction area through a fourth water through hole, and an aeration pipe is arranged at the bottom of the MFBR reaction area; and a gas stripping device is arranged in the settling zone, and the liquid outlet end of the gas stripping device is communicated with the anoxic zone through a return pipe. However, the invention also has the main defects in the Chinese invention patent with the application publication number of CN 110436703A.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an MFBR sewage treatment device and a sewage treatment method.
According to one aspect of the invention, an MFBR sewage treatment device used in the technical field of wastewater and sewage treatment is provided, which comprises an MFBR reaction tank, wherein biological fillers are filled in the MFBR reaction tank, one end of the MFBR reaction tank is provided with a water inlet, the other end of the MFBR reaction tank is provided with a water outlet, the MFBR reaction tank is sequentially divided into a first-order degradation zone, a relay grading zone and a second-order degradation zone along the direction from the water inlet to the water outlet, and the relay grading zone is respectively communicated with the first-order degradation zone and the second-order degradation zone;
the first-order degradation area is used for degrading COD, and the relay grading area is used for screening and grading microorganisms to culture microorganisms suitable for each stage; the second-order degradation zone is used for degrading ammonia nitrogen.
Furthermore, a first partition wall is arranged between the first-order degradation area and the relay grading area, a second partition wall is arranged between the second-order degradation area and the relay grading area, and water through holes are formed in the first partition wall and the second partition wall; the first-order degradation zone comprises a first biological intercepting device, a first air distribution fluidizing device and a first anti-blocking device, the first biological intercepting device is close to the first partition wall and located at an upper position, the first air distribution fluidizing device is fixed on the side wall of the first-order degradation zone, and the first anti-blocking device is close to the water passing holes in the first partition wall.
Further, the MFBR reaction tank is formed by a steel structure, the first partition wall and the second partition wall are both made of perforated steel plates, and the volume of the MFBR reaction tank is determined according to the daily treatment capacity of the MFBR sewage treatment device.
Further, the relay classification zone comprises a second biological intercepting device, a second air distribution and fluidization device and a second anti-blocking device, the second biological intercepting device is close to the second partition wall and is located at the lower position, the second air distribution and fluidization device is fixed on the side wall of the relay classification zone, and the second anti-blocking device is close to the water through holes in the second partition wall.
Further, the second-order degradation zone comprises a third biological intercepting device, a third air distribution fluidizing device and a third blocking prevention device, the third biological intercepting device is located on the side wall of the tail end of the second-order degradation zone and located at an upper position, the second air distribution fluidizing device is fixed on the side wall of the second-order degradation zone, and the second blocking prevention device is close to the water outlet.
Further, the first biological intercepting device, the second biological intercepting device and the third biological intercepting device are all intercepting nets formed by punching plates, and the pore diameter and the pore space of each intercepting net are determined according to the size of the biological filler.
Furthermore, the first air distribution fluidizing device, the second air distribution fluidizing device and the third air distribution fluidizing device respectively comprise a plurality of aeration pipelines, the plurality of aeration pipelines are fixed on the side wall of the MFBR reaction tank through steel rods, the diameters of aeration holes on the plurality of aeration pipelines are different, and valves for adjusting the air output are arranged on the aeration pipelines.
Further, the first anti-blocking device, the second anti-blocking device and the third anti-blocking device adopt a purging aeration device.
According to another aspect of the present invention, there is provided a wastewater treatment method comprising: the water body to be treated enters the MFBR sewage treatment device to be treated with ammonia nitrogen, COD and partial phosphorus indexes; then the sewage enters a water body purification device, a water treatment agent is added for dephosphorization reaction, phosphorus is separated by the water body purification device, and finally the treated water body is discharged into a river channel.
Further, the water treatment agent is polyaluminium chloride and polyacrylamide.
Compared with the prior art, the invention has the following beneficial effects:
according to the MFBR sewage treatment device and the sewage treatment method, the reasonable grid design of the MFBR sewage treatment device is adopted, the filler is limited to move in a specific area, microorganisms can be screened, the microorganisms suitable for each stage are cultured, the treatment on pollutants in water is more targeted, and the rapid and stable degradation of indexes such as COD (chemical oxygen demand), ammonia nitrogen and the like can be realized within a short retention time in the treatment on certain low-COD, toxic and high-salinity water; and because of the stability of the filler, the problem of loss of microorganisms can not occur, the method is suitable for treating the low COD type water body, the toxic water body and the high salinity water body which can not be treated by the common activated sludge method, and has the advantage that other sewage treatment processes can not be compared.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of an MFBR sewage treatment plant in an embodiment of the present invention;
FIG. 2 is a schematic side view of an MFBR sewage treatment plant in an embodiment of the present invention;
FIG. 3 is a process flow diagram of the water treatment of the inland river channel in the embodiment of the invention;
FIG. 4 is a process flow diagram of industrial wastewater treatment in an example of the present invention;
in the figure: 1 is the MFBR reaction tank, 2 is first order degradation district, 3 is the relay classification district, 4 is the second order degradation district, 5 is the water inlet, 6 is first biological intercepting device, 7 is first gas distribution fluidizer, 8 is first anti-clogging device, 9 is the biological intercepting device of second, 10 is second gas distribution fluidizer, 11 is the second anti-clogging device, 12 is the delivery port, 13 is the third biological intercepting device, 14 is the third gas distribution fluidizer, 15 is the third anti-clogging device.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the concept of the invention. All falling within the scope of the present invention.
The embodiment of the invention provides an MFBR sewage treatment device, as shown in figures 1-2, the MFBR sewage treatment device comprises an MFBR reaction tank 1, the MFBR reaction tank 1 is designed in a partition mode, the MFBR reaction tank is sequentially divided into a first-order degradation area 2, a relay grading area 3 and a second-order degradation area 4 from left to right, namely from a water inlet 5 to a water outlet 12, according to the direction of water flow, the relay grading area 3 is respectively communicated with the first-order degradation area 2 and the second-order degradation area 4, the design can limit movement of a filler in a specific area, microorganisms are screened in a grading mode, the microorganisms suitable for each stage are cultured, the pertinence of water pollutant treatment is improved, and the problem of microorganism loss cannot occur due to the stability of the filler.
The first-order degradation zone 2 is used for degrading COD, and the left end is provided with a water inlet 5 which comprises a first biological interception device 6, a first gas distribution fluidization device 7 and a first anti-blocking device 8. During operation, the grids are filled with the biological filler, sewage enters from the water inlet 5, and COD is degraded by bacterial strains which are attached to the surface of the biological filler and degrade COD.
The relay classification zone 3 is used for dividing the first-order degradation zone 2 and the second-order degradation zone 4, is communicated with the first-order degradation zone 2 and the second-order degradation zone 4 through water holes arranged on the partition wall, simultaneously screens and classifies microorganisms, and cultivates the microorganisms suitable for each stage, and comprises a second biological intercepting device 9, a second air distribution fluidizing device 10 and a second anti-blocking device 11. The relay classification zone 3 is mainly designed aiming at different degradation microorganisms (such as COD, ammonia nitrogen, total phosphorus and the like) required by different pollutants, different concentrations of the same pollutant and load impact on a system due to fluctuation of inlet water quality (inevitable condition), so that stable operation of various pollutant systems after treatment and degradation can be ensured, and outlet water reaches design standards. Specifically, different types of microorganisms (such as bacterial strains for degrading COD, nitrifying bacteria for denitrification and the like) are required for degrading different types of pollutants (such as COD, ammonia nitrogen, total phosphorus and the like), the microorganism populations of all levels can be optimized by setting in a grading way, different types of dominant microorganism populations can be formed at all levels, and the competitive interference of the different types of microorganism populations is avoided at the same time, so that the high-efficiency removal efficiency is formed; the condition of high-concentration sewage is the same, the superior microorganism populations of all levels can be formed by the graded arrangement, the loads of all levels are different, the quantity and the capability of microorganisms are different, the powerful pollutant degradation removal guarantee is formed step by step, and meanwhile, the impact of water quality fluctuation can be resisted.
The second-order degradation zone 4 is used for degrading ammonia nitrogen, and the right end of the second-order degradation zone is provided with a water outlet 12 which comprises a third biological interception device 13, a third gas distribution fluidization device 14 and a third blockage prevention device 15. When the biological filler is in work, the nitrifying bacteria for denitrification are attached to the surface of the biological filler to degrade ammonia nitrogen.
Preferably, the MFBR reaction tank 1 is made of a steel structure, and the partitions are connected by a steel plate with holes, that is, the first partition between the first-order degradation zone 2 and the relay classification zone 3 and the second partition between the second-order degradation zone 4 and the relay classification zone 3 are steel plates with holes, the first partition and the second partition are provided with water through holes, the floor area of the MFBR reaction tank needs to be adjusted according to daily throughput, and the MFBR reaction tank has a volume of 11.6m long, 3m wide and 3.15 m high for a daily throughput of 2000 square.
Preferably, the first biological intercepting device 6, the second biological intercepting device 9 and the third intercepting device 13 are grid-structured intercepting nets made of punching plates, different numbers of round holes with the same aperture are designed according to different flow rates, and the aperture of the round holes is smaller than the diameter of biological fillers like a sieve, so that the intercepting function is realized, and in order to reduce the occupied area of the biological intercepting devices, the biological intercepting devices can be curled into a barrel shape after being processed into equipment; the first biological intercepting device 6 is arranged at the upper position of the right end of the first-order degradation zone 2, namely the first biological intercepting device 6 is close to the first partition wall and is positioned at the upper position, the second biological intercepting device 9 is arranged at the lower position of the right end of the relay grading zone 3, namely the second biological intercepting device 9 is positioned at the tail end side wall of the second-order degradation zone 4 and is positioned at the upper position, the third intercepting device 13 is arranged at the upper position of the right end of the second-order degradation zone 4, namely the third biological intercepting device 13 is positioned at the tail end side wall of the second-order degradation zone 4 and is positioned at the upper position, so that the arrangement is mainly considered from the flow state of a water body, the possibility of 'short flow' in each stage is avoided, the microorganisms and the sewage are fully mixed, contacted and transferred, and the efficient degradation efficiency is achieved; the position and the aperture of each biological interception device are adjusted according to the size of the biological filler and the daily sewage treatment capacity.
The first air distribution fluidizing device 7, the second air distribution fluidizing device 10 and the third air distribution fluidizing device 14 comprise a plurality of aeration pipelines; preferably, the first air distribution fluidizing device 7, the second air distribution fluidizing device 10 and the third air distribution fluidizing device 14 are respectively composed of 4 aeration ends with different pore diameters, are respectively fixed on the side wall of the first-order degradation zone 2, the relay classification zone 3 and the second-order degradation zone 4 through two steel rods and are provided with valve control, the air output can be adjusted through different heights and pore diameters, so that biological fillers in the zone can move fully, and the sizes and the number of the aeration ends can be increased according to daily treatment capacity. The air distribution fluidization device adopts the process design of automatically adjusting oxygenation aeration fluidization with multiple apertures and different pressures, and is provided with an anti-blocking structural design, so that the possibility of blockage of the device is avoided, the oxygen dissolving efficiency can reach more than 30 percent, and the energy is saved and the consumption is reduced.
Preferably, the first anti-blocking device 8, the second anti-blocking device 11 and the third anti-blocking device 15 all adopt purging aeration devices, microporous structures are arranged on the purging devices, compressed air is uniformly ejected through micropores on the purging devices to form a jet flow effect, biological fillers gathered on the periphery of the intercepting devices are blown away, the biological fillers are prevented from being accumulated on the surface of the intercepting devices and being blocked, and a rotational flow state is formed through a flow state design, so that the biological fillers flow back to the front end; each anti-blocking device is distributed on the partition walls of the first-order degradation zone 2, the relay classification zone 3 and the second-order degradation zone 4 and the side wall at the tail end of the second-order degradation zone 4, the first anti-blocking device 8 is close to the water through hole on the first partition wall, the second anti-blocking device 11 is close to the water through hole on the second partition wall, and the second anti-blocking device 11 is close to the water outlet 12.
In the MFBR reaction tank 1, the first-order degradation zone 2, the relay classification zone 3 and the second-order degradation zone 4 can degrade ammonia nitrogen and COD, classify biological fillers and degrade partial phosphorus. Part of phosphorus indexes are treated in the MFBR reaction tank 1 and are biologically synthesized and degraded mainly through the life activities of microorganisms, phosphorus is taken as a nutrient element and is absorbed by the microorganisms as nutrients along with the growth and the propagation of the microorganisms to form the tissues of the microorganisms; in the aeration process, the filler cuts air, so that the dissolved oxygen in the water body is higher than that in the common water body, and phosphorus-accumulating bacteria can excessively adsorb phosphorus elements.
The MFBR sewage treatment device in the embodiment of the invention adopts multi-stage MBBR&SBBR combined process, by cultivating and attaching on the surface area of more than 800m2/m3The mixed facultative strain on the nano-microbial filler realizes the high-efficiency biological denitrification of COD degradation, nitrification-denitrification and shortcut nitrification-denitrification, wherein the specific surface area of the biological filler reaches 800m2/m3In the method, the process of the biological fluidized bed is adopted, so the design load of ammonia nitrogen and COD is more than 2.0 times of that of the traditional process, and the volume of the tank can be reduced by more than 2.0 times under the condition of the same water quantity and the same water quality.
The embodiment of the invention also provides a sewage treatment method, which is realized based on the MFBR sewage treatment device in the embodiment and comprises the following steps: the water body to be treated enters the MFBR sewage treatment device in the embodiment to be treated to treat ammonia nitrogen, COD and partial phosphorus indexes; then the sewage enters a water body purification device, a water treatment agent is added for dephosphorization reaction, phosphorus is separated by the water body purification device, and finally the treated water body is discharged into a river channel.
In order to improve the effect of sewage treatment, in some preferred embodiments, the water treatment agent is polyaluminium chloride and polyacrylamide.
Application example 1
In the embodiment, the MFBR sewage treatment device is applied to the treatment of water quality of inland rivers, the whole design scheme is shown in fig. 1-2, and the MFBR sewage treatment device comprises an MFBR reaction tank 1, wherein the MFBR reaction tank 1 is designed in a partition mode and is sequentially divided into a first-order degradation area 2, a relay classification area 3 and a second-order degradation area 4 according to the water flow direction; the first-order degradation zone 2 comprises a water inlet 5, a first air distribution fluidization device 7, a first biological interception device 6 and a first anti-leakage device 8; the relay grading zone 3 is communicated with the first-order degradation zone 2 through water holes formed in a partition wall and comprises a second air distribution and fluidization device 10, a second biological interception device 9 and a second anti-leakage device 11; the second decomposition area 4 is communicated with the relay classification area 3 through water holes formed in the partition wall, and comprises a third air distribution fluidization device 14, a third biological interception device 13, a third prevention and leakage stoppage device 15 and a water outlet 12.
The MFBR reaction tank 1 is made of steel structure, and is connected with each other by perforated steel plate before each grid, the designed water amount is 1000m2The volume is 11.6m in length, 3m in width and 3.15 m in height.
The first biological intercepting device 6, the second biological intercepting device 9 and the third intercepting device 13 are grid-structured intercepting nets made of punching plates, the aperture and the gap of each intercepting net are 1.5cm, so that the intercepting function is realized, and in order to reduce the occupied area of the biological intercepting devices, the biological intercepting devices can be curled into a barrel shape after being instrumented; the first biological intercepting device 6 is arranged at the upper position of the right end of the first-order degradation area 2, the second biological intercepting device 9 is arranged at the lower position of the right end of the relay classification area 3, and the third intercepting device 13 is arranged at the upper position of the right end of the second-order degradation area 4.
The first air distribution fluidizing device 7, the second air distribution fluidizing device 10 and the third air distribution fluidizing device 14 are respectively composed of 4 aeration ends with different aperture diameters, are respectively fixed on the side wall of the first-order degradation zone 2, the relay grading zone 3 and the second-order degradation zone 4 through two steel rods and are provided with valve control, the air output can be adjusted through different heights and aperture diameters, so that the biological filler in the zone can move fully, and the size and the number of the aeration ends can be increased according to the daily treatment capacity.
The first anti-blocking device 8, the second anti-blocking device 11 and the third anti-blocking device 15 are all composed of a purging aeration device, a micropore structure is arranged on the purging device, compressed air is uniformly ejected through micropores on the purging device to form a jet flow effect, biological fillers gathered on the periphery of the intercepting device are blown away, the biological fillers are prevented from being accumulated on the surface of the intercepting device and blocked, and a rotational flow state is formed through a flow state design, so that the biological fillers flow back to the front end; the anti-blocking devices are distributed on the partition walls of the first-order degradation zone 2, the relay grading zone 3 and the second-order degradation zone 4 and the side wall at the tail end of the second-order degradation zone 4.
The process flow diagram is shown in fig. 3, the treated water body is lifted by a lift pump and enters a biological multi-effect reactor (MFBR) for treating ammonia nitrogen, COD and a part of phosphorus indexes. After the biochemical treatment is finished, PAC and PAM agents are added to carry out dephosphorization reaction, phosphorus is separated out of the system by the water body purification device, and finally the effluent of the system meets the discharge requirement and is discharged into a river channel.
The experimental effect is as follows:
the water treatment amount of the project is 1000m3Effective pool volume of biochemical system of 100m3The retention time is 2.4 h; the adding quantity of the filler is 50m3After 28-day data recording, the water quality of inlet water is COD 40-60mg/L, NH 3-N4-8 mg/L, TP0.1-0.3mg/L, the water quality of treated outlet water is kept at COD 15-20mg/L, NH 3-N0.53-0.89 mg/L, TP 0.08.08-0.15 mg/L, the first class water standard is basically achieved, and the treatment effect is obvious.
Application example 2
In this embodiment, the MFBR sewage treatment apparatus is applied to the treatment of industrial wastewater, and the schematic structural diagram of the MFBR sewage treatment apparatus is the same as that of application example 1.
The process flow diagram is shown in fig. 4, the treated water body is lifted by a lift pump and enters a biological multi-effect reactor for treating ammonia nitrogen, COD and a part of phosphorus indexes. After the biochemical treatment is finished, PAC and PAM agents are added to carry out dephosphorization reaction, phosphorus is separated out of the system by the water body purification device, and finally the effluent of the system meets the discharge requirement and is discharged into a river channel.
The experimental effect is as follows:
the water treatment amount of the project is 1000m3Effective pool volume of biochemical system of 100m3The retention time is 2.4 h; the adding quantity of the filler is 50m3After 31-day data recording, the quality of inlet water COD is 30-114mg/L, NH 3-N6-15 mg/L, TP0.1-0.3mg/L, the quality of treated outlet water is kept at COD 15-23mg/L, NH 3-N0.32-0.89 mg/L, TP 0.13.13-0.22 mg/L, and basically reaches the first-class water standard, and the treatment effect is obvious.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The above-described preferred features may be used in any combination without conflict with each other.

Claims (10)

1. An MFBR sewage treatment device is characterized by comprising an MFBR reaction tank, biological fillers are filled in the MFBR reaction tank, one end of the MFBR reaction tank is provided with a water inlet, the other end of the MFBR reaction tank is provided with a water outlet, the MFBR reaction tank is sequentially divided into a first-order degradation zone, a relay grading zone and a second-order degradation zone along the direction from the water inlet to the water outlet, and the relay grading zone is respectively communicated with the first-order degradation zone and the second-order degradation zone;
the first-order degradation area is used for degrading COD, and the relay grading area is used for screening and grading microorganisms to culture microorganisms suitable for each stage; the second-order degradation zone is used for degrading ammonia nitrogen.
2. The MFBR sewage treatment plant of claim 1, wherein a first partition wall is disposed between said first-stage degradation zone and said staging relay zone, a second partition wall is disposed between said second-stage degradation zone and said staging relay zone, and water through holes are disposed on both said first partition wall and said second partition wall;
the first-order degradation zone comprises a first biological intercepting device, a first air distribution and fluidization device and a first anti-blocking device, the first biological intercepting device is close to the first partition wall and located at an upper position, the first air distribution and fluidization device is fixed on the side wall of the first-order degradation zone, and the first anti-blocking device is close to the water through holes in the first partition wall.
3. The MFBR sewage treatment apparatus of claim 2, wherein the MFBR reaction tank is formed of a steel structure, the first partition wall and the second partition wall are each a perforated steel plate, and a volume of the MFBR reaction tank is determined according to a daily capacity of the MFBR sewage treatment apparatus.
4. The MFBR sewage treatment plant of claim 2, wherein the staging area comprises a second biological interception device adjacent to the second partition and at a lower position, a second air distribution fluidization device fixed to the sidewall of the staging area, and a second anti-clogging device adjacent to the water through holes in the second partition.
5. The MFBR sewage treatment plant of claim 4, wherein said second degradation zone comprises a third biological intercepting means located at the trailing sidewall of said second degradation zone and in an upper position, a third air distribution fluidizing means fixed to the sidewall of said second degradation zone, and a third anti-clogging means located near said water outlet.
6. The MFBR sewage treatment apparatus of claim 5, wherein each of the first biological intercepting device, the second biological intercepting device and the third biological intercepting device is an intercepting net formed of perforated plates, and the pore size and pore size of the intercepting net are determined according to the size of biological packing.
7. An MFBR sewage treatment plant according to claim 5, wherein said first air distribution fluidizing device, said second air distribution fluidizing device and said third air distribution fluidizing device each comprise a plurality of aeration pipes fixed to a side wall of said MFBR reaction tank by steel rods, wherein aeration holes of said plurality of aeration pipes have different hole diameters, and wherein said aeration pipes are provided with valves for regulating the amount of air to be discharged.
8. The MFBR sewage treatment apparatus of claim 5, wherein the first, second and third anti-clogging devices each employ a purge aeration device.
9. A method of treating wastewater, comprising: the water body to be treated enters the MFBR sewage treatment plant of any one of claims 1-8 for ammonia nitrogen, COD and partial phosphorus index treatment; then the sewage enters a water body purification device, a water treatment agent is added for dephosphorization reaction, phosphorus is separated by the water body purification device, and finally the treated water body is discharged into a river channel.
10. The wastewater treatment method according to claim 9, wherein the water treatment agent is polyaluminium chloride or polyacrylamide.
CN202210534688.6A 2022-05-17 2022-05-17 MFBR sewage treatment device and sewage treatment method Pending CN114702209A (en)

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CN105502815A (en) * 2015-12-10 2016-04-20 南京国能环保工程有限公司 Treatment method of sludge drying condensate water
CN106746378A (en) * 2017-03-15 2017-05-31 青岛思普润水处理股份有限公司 One kind solidification high-effective microorganism film sewage water treatment method and equipment
CN215905936U (en) * 2021-09-10 2022-02-25 南京盛世生态环境科技研究院有限公司 Multistage MBBR synchronous decarbonization nitrogen and phosphorus removal preliminary treatment sewage treatment system

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Publication number Priority date Publication date Assignee Title
CN105502815A (en) * 2015-12-10 2016-04-20 南京国能环保工程有限公司 Treatment method of sludge drying condensate water
CN106746378A (en) * 2017-03-15 2017-05-31 青岛思普润水处理股份有限公司 One kind solidification high-effective microorganism film sewage water treatment method and equipment
CN215905936U (en) * 2021-09-10 2022-02-25 南京盛世生态环境科技研究院有限公司 Multistage MBBR synchronous decarbonization nitrogen and phosphorus removal preliminary treatment sewage treatment system

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