CN108928920B - Comprehensive pool with pollutant emission reduction, regulation and tempering and denitrification functions - Google Patents

Comprehensive pool with pollutant emission reduction, regulation and tempering and denitrification functions Download PDF

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CN108928920B
CN108928920B CN201810580492.4A CN201810580492A CN108928920B CN 108928920 B CN108928920 B CN 108928920B CN 201810580492 A CN201810580492 A CN 201810580492A CN 108928920 B CN108928920 B CN 108928920B
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regulation
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overflow
integrated
water
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CN108928920A (en
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胡维杰
朱洁
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/301Aerobic and anaerobic treatment in the same reactor
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • C02F3/305Nitrification and denitrification treatment characterised by the denitrification
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F7/00Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
    • E03F7/02Shut-off devices
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001Runoff or storm water
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F2201/00Details, devices or methods not otherwise provided for
    • E03F2201/10Dividing the first rain flush out of the stormwater flow

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention discloses a comprehensive pool with pollutant emission reduction, regulation, tempering and denitrification functions, and belongs to the technical field of municipal drainage or environmental engineering. The integrated pool comprises a muddy water adjusting area, is connected with the output end of the integrated reverse pool and is used for receiving muddy water generated by the integrated reverse pool and adjusting the water quality; the sedimentation area is connected with the muddy water adjusting area and is used for carrying out sedimentation treatment on the muddy water output by the muddy water adjusting area, and the sedimentated effluent converges into an effluent box culvert of the integrated biological reaction tank; and the overflow storage area is used for storing overflow sewage exceeding the treatment scale of the sewage plant or used as a preposed denitrification tank of an integrated denitrification tank of the sewage plant to play a denitrification function. The comprehensive pool can greatly reduce the discharge amount of pollutants in a sewage plant, and greatly improve the water environment quality.

Description

Comprehensive pool with pollutant emission reduction, regulation and tempering and denitrification functions
Technical Field
The invention discloses a comprehensive pool with pollutant emission reduction, storage regulation and tempering and denitrification functions and a method for improving water environment in a sewage treatment plant, and belongs to the technical field of municipal drainage or environmental engineering. The invention is suitable for sewage treatment plants which do not consider the regulation and storage of overflow water or adopt the integrated activated sludge process.
Background
The sewage treatment is an important means for reducing the emission of pollutants in the urban water system, and the urban sewage treatment plant and the matched pipe network system are used as important components for building urban environment infrastructure and play a very key role in controlling urban water pollution and improving water environment.
At present, drainage pipelines in cities are more and more built, the sewage interception rate is higher and higher, but the urban water environment quality is still unsatisfactory, and the main reason is that China gives insufficient attention to pollution control of overflow sewage. The overflow sewage contains various nutrients such as pathogenic bacteria, nitrogen and phosphorus and high-concentration solid particle pollutants, can pollute the receiving water body, and is one of the main factors of surface water pollution in China.
At present, according to different site conditions and different environmental requirements of receiving water bodies, two common treatment methods of overflow sewage are available:
a. the in-situ treatment mainly comprises grid treatment, vortex separation treatment, precipitation treatment, air floatation treatment, high-speed filtration treatment, primary strengthening treatment and the like;
b. the treatment of the sewage plant is realized by arranging a shutoff pipe to overflow and collect the combined sewage and convey the combined sewage to a municipal sewage plant for treatment.
Wherein, the on-site treatment requires newly-built treatment facilities, increases the management and operation requirements, and is still influenced to a certain extent by the limitation of the treatment degree; the overflow sewage directly enters a sewage plant for treatment, and can cause impact load on the aspects of water quantity and water quality to the sewage plant, influence the normal operation of the sewage plant and even cause the overflow of the sewage plant. Studies have shown that the overflow problem of town sewage treatment plants is one of the important reasons for the failure of fundamental control of town water pollutant discharge.
In addition, water plants that employ integrated activated sludge processes have muddy water treatment problems. The integrated activated sludge process is similar to SBR principle, and the anaerobic, anoxic, aerobic and sedimentation processes are completed in the same reaction tank by switching, stirring and aerating water inlet and outlet points, and muddy water is intermittently produced in the normal operation process. Due to the high concentration of muddy water pollutants, the muddy water generally flows back to the water inlet pump room and is treated in the whole process again. Circulating the muddy water between the reaction tank and the pretreatment facilities also reduces the effective utilization rate of the treatment facilities to some extent.
Therefore, a comprehensive pool which gives consideration to pollutant emission reduction, overflow regulation and tempering and muddy water treatment is needed to be arranged in a sewage plant, on one hand, the water quality and water quantity impact resistance load of the sewage plant can be improved, and the normal operation of the sewage plant is ensured, on the other hand, the existing pretreatment and subsequent treatment facilities of the sewage plant can be fully utilized, the overflow sewage and the muddy water are treated to the maximum extent, the pollution of the sewage and the muddy water to a receiving water body is reduced, and the water environment is improved.
Disclosure of Invention
The invention discloses a comprehensive pool with pollutant emission reduction, regulation and tempering and denitrification functions in a sewage treatment plant, which can effectively solve the overflow problem and muddy water treatment problem of the sewage treatment plant.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a compromise pollutant emission reduction, regulation and tempering and denitrification function's comprehensive pond, sewage plant are equipped with the pretreatment unit who connects gradually, metering device and integrated metaplasia pond, its characterized in that, synthesize the pond and include that
The first input end of the overflow regulation and storage area is connected with the output end of the pretreatment unit or the output end of the metering instrument through a first switching valve, the output end of the overflow regulation and storage area is connected with the input end of the metering instrument or the input end of the integrated reaction tank through a second switching valve, and the second input end of the overflow regulation and storage area is connected with the output end of the integrated reaction tank through a third valve;
the muddy water adjusting area is connected with the output end of the integrated reaction tank and is used for receiving muddy water generated by the integrated reaction tank and adjusting the water quality;
and the settling zone is connected with the muddy water regulating zone and is used for settling the muddy water output by the muddy water regulating zone, the settled water is converged into a water outlet box culvert of the integrated biological reaction tank, and the sludge in the settling zone is connected to the integrated reaction tank or the overflow regulation and storage zone through a fourth switching valve.
According to one embodiment of the invention, the first input end of the overflow regulation area is communicated with the output end of the pretreatment unit, the output end of the overflow regulation area is communicated with the input end of the metering instrument, the sludge in the settling area is communicated with the integrated reaction tank, the overflow regulation area receives overflow sewage exceeding the treatment scale of the sewage plant, and the sewage is conditioned and then is sent to the integrated reaction tank to complete the subsequent full-flow treatment.
According to another embodiment of the invention, the first input end of the overflow regulation area is communicated with the output end of the metering instrument, the second input end of the overflow regulation area is communicated with the output end of the integrated reaction tank, the output end of the overflow regulation area is communicated with the input end of the integrated reaction tank, the sludge in the settling area is communicated with the overflow regulation area, and the overflow regulation area is used as a preposed denitrification tank of the integrated reaction tank of the sewage plant to play a denitrification function.
Furthermore, a submersible stirrer is arranged in the muddy water adjusting area, and the muddy water adjusting area mainly receives untreated and complete muddy water which is intermittently discharged in the running process of the biological reaction tank of the integrated activated sludge process.
Further, the sedimentation zone adopts a horizontal flow sedimentation tank.
Furthermore, the sedimentation zone is provided with two water outlets, wherein one water outlet is connected to the integrated anti-pool water outlet box culvert, and the other water outlet is connected to the overflow storage regulating zone; the two water outlets are controlled by the gate, and when the quality of the effluent of the sedimentation tank is superior to a set value, the effluent of the sedimentation zone automatically flows into the integrated anti-tank effluent box culvert to be connected; when the effluent quality of the sedimentation tank is poor, the effluent of the sedimentation tank can be discharged into an overflow regulation and storage area.
Furthermore, overflow regulation district sets up a plurality of dive agitators, and during the sewage dwell, through the stirring of dive agitator, keep water mobility, carry out the quenching and tempering.
The invention discloses an application method of a comprehensive pool with pollutant emission reduction, regulation and tempering and denitrification functions in a sewage plant, which can effectively solve the overflow problem and the muddy water treatment problem of the sewage plant.
In order to achieve the purpose, the technical scheme of the invention is as follows: a method for applying a comprehensive pool with pollutant emission reduction, regulation and conditioning and denitrification functions to a sewage plant is characterized in that muddy water generated by an integrated activated sludge process flows into a muddy water regulation area and a sedimentation area of the comprehensive pool in sequence, outlet water of the sedimentation area is converged into outlet water of the integrated denitrification pool, when the quality of the outlet water of the sedimentation area is poor, the outlet water can also flow into an overflow regulation and storage area, and the overflow regulation and storage area can be used as a regulation and storage pool for overflow sewage and also can be used as a preposed denitrification pool of the integrated denitrification pool; when the inlet water volume of the sewage plant exceeds the design scale of the sewage plant, the regulating and storing area is used for regulating and storing the pretreated overload overflow sewage, and the inlet sewage is regulated and tempered by the stirring of the submersible stirrer during the stay period of the sewage in the overflow regulating and storing area; when the denitrification effect needs to be enhanced by water inflow, the overflow regulation area can also be used as a preposed denitrification tank of the biological denitrification tank, the overflow regulation area receives all sewage pretreated by a sewage plant at the moment, simultaneously receives mixed liquid of the integrated denitrification tank and sludge discharged from the sedimentation tank, carries out denitrification reaction, and finally discharges effluent of the overflow regulation area to the integrated denitrification tank to finish the discharge after the follow-up full-flow treatment reaches the standard.
The comprehensive pool mainly comprises three functions: (1) regulation and regulation are provided for rain and sewage overflow of a rain season combined system, regulation and regulation are provided for overflow generated by overhaul and accident states of a dry season sewage plant, overflow pollutant discharge is reduced, and stable operation of the sewage plant is guaranteed; (2) aiming at the condition that a sewage plant needs to strengthen the denitrification effect, the comprehensive tank can also be used as a front denitrification tank to play a denitrification role; (3) the muddy water generated by the integrated biological reaction tank is subjected to regulation, storage and sedimentation treatment, so that the negative influence of the backflow of the muddy water on sewage treatment can be avoided. The comprehensive pool can greatly reduce the discharge amount of pollutants in a sewage plant, and greatly improve the water environment quality.
Drawings
FIG. 1 is a schematic diagram of the operation of an integrated tank for overflow storage and treatment of muddy water;
FIG. 2 is a schematic diagram of the operation of the integrated tank for pre-denitrification and muddy water treatment.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The utility model provides a compromise pollutant emission reduction, regulation and tempering and denitrification function's comprehensive pond, sewage plant are equipped with the pretreatment unit who connects gradually, metering device and integrated metaplasia pond, its characterized in that, synthesize the pond and include that
The first input end of the overflow regulation and storage area is connected with the output end of the pretreatment unit or the output end of the metering instrument through a first switching valve, the output end of the overflow regulation and storage area is connected with the input end of the metering instrument or the input end of the integrated reaction tank through a second switching valve, and the second input end of the overflow regulation and storage area is connected with the output end of the integrated reaction tank through a third valve;
the muddy water adjusting area A is connected with the output end of the integrated reaction tank and is used for receiving muddy water generated by the integrated reaction tank and adjusting the water quality;
and the settling zone B is connected with the muddy water regulating zone and is used for settling the muddy water output by the muddy water regulating zone, the settled water is converged into a water outlet box culvert of the integrated biological reaction tank, and the sludge in the settling zone is connected to the integrated reaction tank or the overflow regulation and storage zone through a fourth switching valve.
By switching the valves, the comprehensive pool can realize two modes of operation conditions.
As shown in fig. 1, when the water inflow of the sewage plant exceeds the treatment scale of the sewage plant, the whole sewage is firstly pretreated, and the pretreatment comprises a coarse grid, a fine grid and a grit chamber; after pretreatment, the sewage within the treatment scale of the sewage plant continuously enters the integrated reverse pool for full-flow treatment, and part of the sewage exceeding the treatment scale of the sewage plant enters the overflow regulation and storage area C of the comprehensive pool for regulation and storage; a plurality of submersible stirrers are arranged in the storage area, and stirring is carried out during the retention period of the sewage to keep the water body fluidity and play a role in regulating the water quality; and then, the sewage in the regulation and storage area C is sequentially pumped to the integrated reverse tank to complete the subsequent whole-flow treatment. Muddy water generated in the normal operation process of the integrated reverse pool is discharged into a muddy water storage area A, and a plurality of submersible stirrers are arranged in the muddy water storage area to play a role in regulating water quality; and lifting the sewage in the muddy water storage area A to a settling area B by a pump, settling, and then enabling the effluent to flow into a water outlet pipe of the integrated reaction tank for subsequent flow treatment, wherein the sludge in the settling area B flows back to the integrated reaction tank.
As shown in fig. 2, when the water inflow of the sewage plant does not exceed the treatment scale but the denitrification effect needs to be enhanced, the whole sewage is firstly pretreated, and the pretreatment comprises a coarse grid, a fine grid and a grit chamber; after pretreatment, all sewage enters an overflow regulation and storage area C of the comprehensive pool; the muddy water of the integrated reverse pond sequentially enters a muddy water storage area A and a sedimentation area B, the effluent of the sedimentation area B flows into a water outlet pipe of the integrated reverse pond to continue the subsequent flow treatment, and the sludge of the sedimentation area B is discharged into an overflow storage area C; the overflow regulation and storage area C can also receive the mixed liquid of the integrated reaction tank. And (3) stirring the sewage by a submersible stirrer during the retention period of the sewage in the overflow regulation and storage area C, and performing denitrification on the sewage under the action of activated sludge. And the outlet water of the overflow regulation area C is lifted by the pump to enter the water inlet pipe of the integrated reaction tank for continuous subsequent flow treatment.

Claims (5)

1. The utility model provides a compromise pollutant emission reduction, regulation and tempering and denitrification function's comprehensive pond, sewage plant are equipped with the pretreatment unit who connects gradually, metering device and integrated metaplasia pond, its characterized in that, synthesize the pond and include that
The first input end of the overflow regulation and storage area is connected with the output end of the pretreatment unit or the output end of the metering instrument through a first switching valve, the output end of the overflow regulation and storage area is connected with the input end of the metering instrument or the input end of the integrated reaction tank through a second switching valve, and the second input end of the overflow regulation and storage area is connected with the output end of the integrated reaction tank through a third valve;
the muddy water adjusting area is connected with the output end of the integrated reaction tank and is used for receiving muddy water generated by the integrated reaction tank and adjusting the water quality;
the sedimentation area is connected with the muddy water regulating area and is used for carrying out sedimentation treatment on the muddy water output by the muddy water regulating area, the sedimentary effluent converges into an effluent box culvert of the integrated biological reaction tank, and sludge in the sedimentation area is connected to the integrated reaction tank or the overflow regulation and storage area through a fourth switching valve;
the sedimentation zone is provided with two water outlets, one of the water outlets is connected to the integrated anti-tank water outlet box culvert, and the other outlet is connected to the overflow storage regulating zone; the two water outlets are controlled by the gate, and when the quality of the effluent of the sedimentation tank is superior to a set value, the effluent of the sedimentation zone automatically flows into the integrated anti-tank effluent box culvert to be connected; when the quality of the effluent of the sedimentation tank is poor, the effluent of the sedimentation tank is discharged into an overflow regulation and storage area;
when the inlet water amount of the sewage plant exceeds the design scale of the sewage plant, the first input end of the overflow regulation and storage area is communicated with the output end of the pretreatment unit, the output end of the overflow regulation and storage area is communicated with the input end of the metering instrument, the sludge in the sedimentation area is communicated with the integrated reaction tank, the overflow regulation and storage area receives the overflow sewage exceeding the treatment scale of the sewage plant, and the sewage is subjected to conditioning and then is sent to the integrated reaction tank to complete the subsequent full-process treatment;
when the water inflow of the sewage plant does not exceed the treatment scale but the denitrification effect needs to be enhanced, the first input end of the overflow regulation and storage area is communicated with the output end of the metering instrument, the second input end of the overflow regulation and storage area is communicated with the output end of the integrated reaction tank, the output end of the overflow regulation and storage area is communicated with the input end of the integrated reaction tank, the sludge in the settling area is communicated with the overflow regulation and storage area, and the overflow regulation and storage area is used as a preposed denitrification tank of the integrated reaction tank of the sewage plant to play a denitrification function;
the muddy water produced by the integrated activated sludge method flows into a muddy water adjusting area and a settling area of the comprehensive pool in sequence, the outlet water of the settling area is converged into the outlet water of the integrated reaction pool, and when the quality of the outlet water of the settling area is poor, the outlet water can also flow into an overflow regulating and storing area which can be used as a regulating and storing pool for overflow sewage and can also be used as a preposed denitrification pool of the integrated reaction pool; when the inlet water volume of the sewage plant exceeds the design scale of the sewage plant, the regulating and storing area is used for regulating and storing the pretreated overload overflow sewage, and the inlet sewage is regulated and tempered by the stirring of the submersible stirrer during the stay period of the sewage in the overflow regulating and storing area; when the denitrification effect needs to be enhanced by water inflow, the overflow regulation area can also be used as a preposed denitrification tank of the biological denitrification tank, the overflow regulation area receives all sewage pretreated by a sewage plant at the moment, simultaneously receives mixed liquid of the integrated denitrification tank and sludge discharged from the sedimentation tank, carries out denitrification reaction, and finally discharges effluent of the overflow regulation area to the integrated denitrification tank to finish the discharge after the follow-up full-flow treatment reaches the standard.
2. The integrated pond integrating pollutant emission reduction, regulation and conditioning and denitrification functions as claimed in claim 1, wherein the muddy water regulation area mainly receives untreated and complete muddy water intermittently discharged in the operation process of the raw denitrification pond of the integrated activated sludge process, and a submersible stirrer is arranged in the muddy water regulation area.
3. The integrated pond integrating pollutant emission reduction, regulation and conditioning and denitrification functions as claimed in claim 1, wherein the settling zone is used for settling muddy water in the regulation and storage zone, and the settling zone is a horizontal flow settling pond.
4. The comprehensive pool integrating pollutant emission reduction, regulation and conditioning and denitrification functions as claimed in claim 1, wherein the pretreatment unit comprises a coarse grid, a fine grid and a grit chamber.
5. The comprehensive pool integrating pollutant emission reduction, regulation and tempering and denitrification functions as claimed in claim 1, wherein a plurality of submersible stirrers are arranged in the overflow regulation area, and during the retention period of sewage, the submersible stirrers are used for stirring to keep the water body fluidity for regulation and tempering.
CN201810580492.4A 2018-06-07 2018-06-07 Comprehensive pool with pollutant emission reduction, regulation and tempering and denitrification functions Active CN108928920B (en)

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CN112062386B (en) * 2020-07-15 2022-11-04 中国电建集团中南勘测设计研究院有限公司 Sewage treatment system and sewage treatment method
CN118495615A (en) * 2024-04-30 2024-08-16 中赟国际工程有限公司 Rainwater overload emergency pretreatment method for sewage treatment plant of confluent pipe network

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