WO2021208367A1 - Procédé et dispositif de traitement d'eaux usées de boue granulaire aérobie de réacteur discontinu à deux étages - Google Patents

Procédé et dispositif de traitement d'eaux usées de boue granulaire aérobie de réacteur discontinu à deux étages Download PDF

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WO2021208367A1
WO2021208367A1 PCT/CN2020/117688 CN2020117688W WO2021208367A1 WO 2021208367 A1 WO2021208367 A1 WO 2021208367A1 CN 2020117688 W CN2020117688 W CN 2020117688W WO 2021208367 A1 WO2021208367 A1 WO 2021208367A1
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reactor
sludge
zone
granular sludge
sewage
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PCT/CN2020/117688
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English (en)
Chinese (zh)
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李军
韦洪堂
邱冲
杨前进
潘劲波
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浙江双林环境股份有限公司
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Publication of WO2021208367A1 publication Critical patent/WO2021208367A1/fr

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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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment

Definitions

  • the invention belongs to the technical field of rural and urban domestic sewage treatment, and particularly relates to a two-stage sequential batch reactor aerobic granular sludge sewage treatment process and equipment.
  • the activated sludge method is a biological wastewater treatment technology with activated sludge microorganisms as the main body.
  • the technology is to continuously mix and cultivate various microbial groups in sewage under artificially enhanced conditions to form activated sludge, and use the microorganisms in the activated sludge to decompose and remove organic pollutants in the sewage under suitable conditions. Then the sludge is separated, and the treated supernatant and excess sludge are discharged out of the system.
  • SBR is the abbreviation of Sequential Batch Activated Sludge Process, which is an activated sludge process that operates in a sequence of intermittent water intake and intermittent aeration. Its main feature is orderliness and intermittent operation.
  • the core of SBR technology is the SBR reaction tank, which integrates the functions of homogenization, primary sedimentation, biodegradation, and secondary sedimentation, and is completed in the pool. Processes such as water inflow, reaction, precipitation, drainage, and idleness. It is suitable for occasions with intermittent discharge and large changes in sewage flow.
  • Aerobic granular sludge technology is a new type of sewage treatment technology. It has the advantages of large biomass of granular sludge, long sludge age, low residual sludge output, fast particle settling speed, efficient sewage treatment, and can withstand higher organic loads. Features such as strong impact load, strong resistance to toxic and harmful effects.
  • the formation mechanism of aerobic granular sludge is complex, including physical, chemical and biological interactions. Generally, the formation process is regarded as a phenomenon of organism aggregation formed by self-aggregation of microorganisms through a variety of mechanisms (extracellular polymer, filamentous bacteria skeleton, induced condensation nucleus, cation binding) under certain conditions such as fluid mechanics and selective pressure.
  • the traditional single-stage SBR granular sludge reactor has to achieve selective pressure, which often causes the problem of high SS in the effluent.
  • the purpose of the present invention is to solve the above-mentioned technical problems in the prior art and provide a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process and equipment, which combines aerobic granular sludge and a sequential batch activated sludge process , It has the advantages and stability of bacteria and efficiency in sewage treatment.
  • the process adopts intermittent water inflow and intermittent aeration to quickly cultivate granular sludge to improve the sewage treatment efficiency and stability of the system.
  • the process adopts a two-stage water-intake method to save carbon source, and at the same time solves the problem of high SS that may be produced by granular sludge due to the fast settling speed.
  • the reactor has the characteristics of strong impact load resistance, high efficiency of pollutant removal, low residual sludge output, and thorough solid-liquid separation.
  • the whole process does not introduce too many processing units, which not only has high processing efficiency, stable effluent up to standard, but also can control the cost at a lower level.
  • the equipment has high water treatment efficiency, high water treatment effect, convenient operation and easy maintenance.
  • the present invention adopts the following technical solutions:
  • a two-stage sequencing batch reactor aerobic granular sludge sewage treatment process which is characterized in that it comprises the following steps:
  • First-level granular sludge sewage treatment the first-level sewage raw water enters the reactor A zone, and the aerobic granular sludge is used to adsorb and degrade the organic matter of the sewage.
  • the aerobic granular sludge can be stabilized and denitrification can be enhanced by adding conditioned sludge fine powder.
  • activated sludge aerobic absorption of phosphorus and on the other hand, the chemical phosphorus removal effect is enhanced by the phosphorus removal composite filler in the reactor A zone, and the phosphorus removal sediment is used to induce coagulation nuclei and promote the sludge granulation process.
  • the iron chelate produced by chemical phosphorus removal provides condensation nuclei, etc. to jointly promote the granulation of aerobic sludge, form and control the selective pressure, and quickly cultivate aerobic granular pollution. mud.
  • aerobic granular sludge is formed with large particle size, compact structure and coexistence of multiple microorganisms.
  • the particles form an aerobic, anoxic and anaerobic microenvironment from the outside to the inside to make heterotrophic bacteria, nitrifying bacteria and denitrifying bacteria, etc. Activities in their respective suitable spaces are conducive to simultaneous nitrification and denitrification and short-range nitrification and denitrification. High-efficiency treatment and fast settlement speed.
  • Secondary activated sludge method sewage treatment the light floc sludge that is not easy to settle in the reactor A zone is introduced into the reactor B zone together with the mixed liquid, and the secondary sewage raw water is introduced into the reactor B zone for use To supplement the carbon source, use the sequencing batch activated sludge process in the reactor B zone to further remove nitrogen and phosphorus, and then stand for precipitation to complete the separation of sludge and supernatant.
  • the granular sludge in the reactor A zone may produce high effluent SS due to the fast settling speed, while the light sludge flocs in the reactor A zone can be completely separated from the light sludge in the reactor B zone, and the sewage can be introduced into the sewage at the same time.
  • the raw water is used to supplement the carbon source and save the carbon source.
  • Sludge collection and drying The surplus sludge produced in zone B of the reactor is discharged to the sludge collection and drying tank through periodic sludge discharge. The surplus sludge produced in zone B of the reactor is discharged to the sludge collection and drying tank through periodic sludge discharge. The sludge collection and drying tank returns the sludge leakage to the reactor B area through the return pipe.
  • the phosphorus-rich dried sludge in the sludge collection and drying tank can be cleaned and reused regularly or treated by the sludge treatment plant ( Such as: sintered ceramsite).
  • step a is:
  • the primary sewage raw water enters the reactor A at the bottom, and the granular sludge is quickly cultivated in the high biomass area at the bottom.
  • the bottom influent promotes the sludge granulation process, which is beneficial to the rapid cultivation of aerobic granular sludge.
  • Intermittent aeration Intermittent aeration to complete biological denitrification and organic matter removal. At the same time, aeration is used to form hydraulic shear to promote sludge granulation, and to speed up the chemical phosphorus removal process of phosphorus removal composite fillers, and use chemical phosphorus removal products. The resulting chelate further promotes the granulation of sludge, and the granular sludge is used to easily form aerobic-anoxic-anaerobic stratified microenvironment to realize simultaneous nitrification and denitrification.
  • Control the selective pressure by controlling the selective pressure in the reactor A zone, the granular sludge with good sedimentation performance is left, and the light floc sludge that is not easy to settle is discharged into the reactor B zone together with the mixed liquid for further processing .
  • the first-stage influent is fed from the bottom of the reactor A through the first inlet pipe, which is conducive to the adsorption and agglomeration of granular sludge at the bottom of the high-biomass zone, and then through the first agitator low-speed anaerobic stirring to enhance the effect of the granular sludge on the organic matter of the sewage
  • the adsorption degradation, and then intermittent aeration to complete the denitrification and organic matter removal process The hydraulic shear formed by aeration is used to promote granulation, and accelerate the chemical phosphorus removal process of the phosphorus removal composite filler, and use the chelate produced by chemical phosphorus removal to further promote the granulation of sludge.
  • the use of granular sludge is easy to form aerobic-anoxia-anaerobic stratified microenvironment to realize the characteristics of simultaneous nitrification and denitrification, and accelerate the degradation of organic matter.
  • the purpose of high-efficiency removal of organic matter, nitrogen and phosphorus removal is achieved.
  • step b is:
  • Supplementary carbon source the raw sewage water is introduced into zone B of the reactor, which is stirred and homogenized by the agitator;
  • the nitrate-nitrogen sewage mixed liquid in zone A of the reactor enters zone B of the reactor, and the secondary influent water is introduced into zone B of the reactor through the second water inlet pipe, and the second agitator is used for stirring and homogenization.
  • the carbon source in the raw sewage water is used for denitrification to achieve the purpose of denitrification and saving carbon sources.
  • the reactor B zone adopts the sequential batch activated sludge method, which integrates the functions of homogenization, primary sedimentation, biodegradation, and secondary sedimentation. In the reactor B zone, processes such as water intake, reaction, precipitation, drainage, and idleness are completed. A small amount of aeration is used to complete the gas stripping. Through the ideal standing and sedimentation process, the sludge and the supernatant are separated to ensure that the effluent SS is stable and meets the standard.
  • a two-stage sequential batch reactor aerobic granular sludge sewage treatment process equipment which is characterized in that it comprises a reactor A zone and a reactor B zone, and the reactor A zone is provided with a first water inlet pipe and a first composite filler ,
  • the reactor B zone is equipped with a water outlet pipe
  • the reactor A zone and the reactor B zone are equipped with a connecting pipe
  • the reactor A zone and the reactor B zone are both equipped with an aeration mechanism, which can conveniently and efficiently carry out sewage treatment.
  • the treatment effect is good, the operation is simple, and the maintenance is easy.
  • a second composite packing is provided in the B zone of the reactor.
  • the second composite packing improves the dephosphorization efficiency in the B zone of the reactor.
  • a second water inlet pipe is provided in the B zone of the reactor.
  • the second water inlet pipe uses the raw sewage water to supplement the carbon source in the B zone of the reactor, which can save the carbon source.
  • the reactor A zone is provided with a first agitator, and the first agitator low-speed anaerobic stirring enhances the adsorption and degradation of the organic matter of the sewage by the granular sludge.
  • a second stirrer is provided in the B zone of the reactor, and the second stirrer stirs and homogenizes.
  • sludge collection and drying tank which is connected to the reactor B zone.
  • the surplus sludge produced in zone B of the reactor is discharged to the sludge collection and drying tank through periodic sludge discharge.
  • the sludge collection and drying tank returns the sludge leakage to the reactor B area through the return pipe.
  • the phosphorus-rich dried sludge in the sludge collection and drying tank can be cleaned and reused regularly or treated by the sludge treatment plant (such as: sintered ceramsite).
  • the aeration mechanism includes an air pump, a one-way valve, an electromagnetic valve and an aeration device.
  • the air pump is connected with the one-way valve
  • the one-way valve is connected with the electromagnetic valve
  • the electromagnetic valve is connected with the aeration device. Intermittent aeration enables efficient and rapid sewage treatment.
  • Aerobic granular sludge is conducive to simultaneous nitrification and denitrification.
  • the two-stage water inflow saves carbon sources and has high treatment efficiency; the sedimentation speed is fast and does not require excessively long hydraulic retention time; the long sludge age is conducive to sludge reduction;
  • the reaction is an ideal push flow, and the biochemical reaction has a large thrust;
  • the precipitation is an ideal static precipitation, and the solid-liquid separation effect is good;
  • Figure 1 is a schematic structural diagram of a two-stage sequencing batch reactor aerobic granular sludge wastewater treatment process according to the present invention.
  • FIG. 1 it is a two-stage sequencing batch reactor aerobic granular sludge wastewater treatment process of the present invention, including the following steps:
  • First-level granular sludge sewage treatment The first-level sewage raw water enters the reactor A zone 1, and the aerobic granular sludge is used to adsorb and degrade the organic matter of the sewage.
  • the aerobic granular sludge can be stabilized and denitrification can be enhanced by adding conditioned sludge fine powder.
  • the activated sludge is used to absorb phosphorus aerobic
  • the phosphorus removal composite filler in the reactor A zone 1 enhances the chemical phosphorus removal effect, and uses the phosphorus removal sediment to induce coagulation nuclei and promote the sludge granulation process.
  • the iron chelate produced by chemical phosphorus removal provides condensation nuclei, etc. to jointly promote the granulation of aerobic sludge, form and control the selective pressure, and quickly cultivate aerobic granular pollution. mud.
  • aerobic granular sludge is formed with large particle size, compact structure and coexistence of multiple microorganisms.
  • the particles form an aerobic, anoxic and anaerobic microenvironment from the outside to the inside to make heterotrophic bacteria, nitrifying bacteria and denitrifying bacteria, etc. Activities in their respective suitable spaces are conducive to simultaneous nitrification and denitrification and short-range nitrification and denitrification. High-efficiency treatment and fast settlement speed.
  • Secondary activated sludge wastewater treatment the light floc sludge that is not easy to settle in reactor A zone 1 is introduced into reactor B zone 2 together with the mixed liquid, and secondary sewage is introduced into reactor B zone 2 at the same time
  • the raw water is used to supplement the carbon source, and is processed by the sequencing batch activated sludge method in the reactor B zone 2, further denitrification and phosphorus removal, and then settles down to complete the separation of sludge and supernatant.
  • the granular sludge in reactor A zone 1 may produce high effluent SS due to its fast settling speed.
  • the light sludge flocs in reactor A zone 1 can be completely solid-liquid separated. Then import the raw sewage water to supplement the carbon source and save the carbon source.
  • Sludge collection and drying The surplus sludge produced in zone 2 of the reactor B is discharged to the sludge collection and drying tank 12 through periodic sludge discharge.
  • the sludge collection and drying tank 12 returns the sludge leakage to the reactor B zone 2 through the return pipe.
  • the phosphorus-rich dried sludge in the sludge collection and drying tank can be cleaned and reused regularly or used by the sludge treatment plant Treatment (such as: sintered ceramsite).
  • the primary sewage raw water enters at the bottom of the reactor A zone 1, where the granular sludge is cultivated in the high biomass area at the bottom, and the bottom influent promotes the process of sludge granulation, which is beneficial to the rapid cultivation of aerobic granular sludge.
  • Intermittent aeration Intermittent aeration to complete biological denitrification and organic matter removal. At the same time, aeration is used to form hydraulic shear to promote sludge granulation, and to speed up the chemical phosphorus removal process of phosphorus removal composite fillers, and use chemical phosphorus removal products. The resulting chelate further promotes the granulation of sludge, and the granular sludge is used to easily form aerobic-anoxic-anaerobic stratified microenvironment to realize simultaneous nitrification and denitrification.
  • Control the selective pressure by controlling the selective pressure in the reactor A zone 1, the granular sludge with good sedimentation performance is left, and the light floc sludge that is not easy to settle is discharged into the reactor B zone 2 together with the mixed liquid. Further processing.
  • the first-stage influent is fed from the bottom of the reactor A zone 1 through the first inlet pipe 3, which is conducive to the adsorption and condensation of granular sludge in the high biomass area at the bottom, and then the first agitator 10 low-speed anaerobic stirring to enhance the granular sludge Adsorption and degradation of organic matter in sewage, and then intermittent aeration to complete the process of denitrification and organic matter removal.
  • the hydraulic shear formed by aeration is used to promote granulation, and accelerate the chemical phosphorus removal process of the phosphorus removal composite filler, and use the chelate produced by chemical phosphorus removal to further promote the granulation of sludge.
  • Inlet water the light floc sludge that is not easy to settle in the reactor A zone 1 is introduced into the reactor B zone 2 together with the mixed liquid;
  • Supplementary carbon source Introduce raw sewage water into reactor B zone 2, and stir and homogenize by agitator;
  • the mixed solution of sewage with nitrate nitrogen in zone 1 of reactor A enters zone 2 of reactor B, and the secondary influent water is introduced into zone 2 of reactor B through the second inlet pipe 9, and the second agitator 11 performs stirring and homogenization.
  • the carbon source in the raw sewage water is used for denitrification to achieve the purpose of denitrification and saving carbon sources.
  • Reactor B zone 2 adopts the sequential batch activated sludge method, which integrates the functions of homogenization, primary sedimentation, biodegradation, and secondary sedimentation.
  • reactor B zone 2 water intake, reaction, precipitation, drainage, and idleness are completed.
  • a small amount of aeration is used to complete the gas stripping. Through the ideal standing and sedimentation process, the sludge and the supernatant are separated to ensure that the effluent SS is stable and meets the standard.
  • a two-stage sequential batch reactor aerobic granular sludge sewage treatment process equipment including reactor A zone 1 and reactor B zone 2, reactor A zone 1 is provided with a first water inlet pipe 3 and a first composite packing 4.
  • Reactor B zone 2 is equipped with a water outlet pipe 5, reactor A zone 1 and reactor B zone 2 are provided with a connecting pipe 6, and reactor A zone 1 and reactor B zone 2 are both equipped with aeration mechanisms. Sewage treatment can be carried out conveniently and efficiently, with good treatment effect, simple operation and easy maintenance.
  • the reactor B zone 2 is provided with a second composite packing 8.
  • the second composite packing 8 improves the dephosphorization efficiency in the B zone 2 of the reactor.
  • the reactor B zone 2 is provided with a second water inlet pipe 9.
  • the second water inlet pipe 9 uses the raw sewage water to supplement the carbon source in the reactor B zone 2, which can save the carbon source.
  • the reactor A zone 1 is provided with a first agitator 10, the first agitator 10 low-speed anaerobic stirring enhances the adsorption and degradation of the organic matter of the sewage by the granular sludge.
  • the reactor B zone 2 is provided with a second stirrer 11, which stirs and homogenizes.
  • the surplus sludge produced in zone 2 of the reactor B is discharged to the sludge collection and drying tank 12 through periodic sludge discharge.
  • the sludge collection and drying tank 12 returns the sludge leakage to the reactor B zone 2 through the return pipe.
  • the phosphorus-rich dried sludge in the sludge collection and drying tank 12 can be cleaned and reused regularly or from the sludge.
  • Treatment plant (such as: sintered ceramsite).
  • the aeration mechanism includes an air pump 13, a one-way valve 14, a solenoid valve 15, and an aeration device 7.
  • the air pump 13 is connected to the one-way valve 14, the one-way valve 14 is connected to the solenoid valve 15, and the solenoid valve 15 is connected to the aeration device 7. Phase connection. Intermittent aeration enables efficient and rapid sewage treatment.
  • Aerobic granular sludge is conducive to simultaneous nitrification and denitrification.
  • the two-stage water inflow saves carbon sources and has high treatment efficiency; the sedimentation speed is fast and does not require excessively long hydraulic retention time; the long sludge age is conducive to sludge reduction;
  • the reaction is an ideal push flow, and the biochemical reaction has a large thrust;
  • the precipitation is an ideal static precipitation, and the solid-liquid separation effect is good;

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  • Biodiversity & Conservation Biology (AREA)
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  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
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  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Water Treatment By Sorption (AREA)
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Abstract

La présente invention concerne un procédé de traitement d'eaux usées de boue granulaire aérobie de réacteur discontinu à deux étages comprenant les étapes suivantes : a. un traitement d'eaux usées de boue granulaire primaire par l'introduction d'eaux usées brutes primaires dans une zone A (1) d'un réacteur, et la réalisation d'une dégradation par adsorption sur des matières organiques d'eaux usées à l'aide d'une boue granulaire aérobie ; b. le traitement des eaux usées à l'aide d'un procédé de boue activée secondaire par l'introduction d'une boue floculent légère peu susceptible de se déposer dans une zone A (1) d'un réacteur avec un liquide mélangé dans une zone B (2) du réacteur, l'introduction d'eaux usées brutes secondaire dans la zone B (2) du réacteur pour compléter une source de carbone en même temps, à l'aide d'un procédé de boues activées par réacteur discontinu de séquençage dans la zone B (2) du réacteur pour le traitement, la mise en œuvre d'une dénitrification et d'une déphosphoration supplémentaires, puis le repos pour la précipitation pour obtenir une séparation des boues et un surnageant ; et c. la collecte et le séchage de boue par la décharge des boues résiduelles produites dans la zone B (2) du réacteur vers un réservoir de collecte et de séchage de boues au moyen d'une décharge périodique de boue. L'invention concerne également un dispositif de traitement d'eaux usées à boue granulaire aérobie de réacteur discontinu à deux étages.
PCT/CN2020/117688 2020-04-13 2020-09-25 Procédé et dispositif de traitement d'eaux usées de boue granulaire aérobie de réacteur discontinu à deux étages WO2021208367A1 (fr)

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CN114477450A (zh) * 2022-02-25 2022-05-13 新疆德安环保科技股份有限公司 加强型生活污水脱氮除磷处理装置及处理方法
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Publication number Priority date Publication date Assignee Title
CN114044619A (zh) * 2021-11-19 2022-02-15 恩格拜(北京)生态科技有限公司 一种水蚯蚓养殖协同粪污水高效处理的方法
CN114477450A (zh) * 2022-02-25 2022-05-13 新疆德安环保科技股份有限公司 加强型生活污水脱氮除磷处理装置及处理方法
CN114956313A (zh) * 2022-05-09 2022-08-30 广东首汇蓝天工程科技有限公司 一种污水处理方法
CN114956313B (zh) * 2022-05-09 2023-09-01 广东首汇蓝天工程科技有限公司 一种污水处理方法
CN116605988A (zh) * 2023-04-07 2023-08-18 广东粤海水务投资有限公司 一种一体化好氧颗粒污泥-膜生物反应器快速启动方法
CN116750923A (zh) * 2023-07-27 2023-09-15 广东万绿环保集团有限公司 一种污水处理工艺及污水处理装置
CN116750923B (zh) * 2023-07-27 2024-01-19 广东万绿环保集团有限公司 一种污水处理工艺及污水处理装置

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