CN111606512A - System for upgrading and modifying sewage treatment plant under condition of limited capacity of biological denitrification tank and operation method - Google Patents
System for upgrading and modifying sewage treatment plant under condition of limited capacity of biological denitrification tank and operation method Download PDFInfo
- Publication number
- CN111606512A CN111606512A CN202010465347.9A CN202010465347A CN111606512A CN 111606512 A CN111606512 A CN 111606512A CN 202010465347 A CN202010465347 A CN 202010465347A CN 111606512 A CN111606512 A CN 111606512A
- Authority
- CN
- China
- Prior art keywords
- tank
- unit
- moving bed
- denitrification
- biological
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- 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
- C02F3/308—Biological phosphorus removal
-
- 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
Landscapes
- 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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
A system for upgrading and transforming a sewage treatment plant under the condition of limited capacity of a biological denitrification tank comprises an anaerobic unit, an anoxic unit, an aerobic unit, a secondary sedimentation tank, a moving bed biomembrane tank and a coagulating sedimentation unit which are sequentially connected; the mixed liquid of the aerobic unit flows back to the anoxic unit, the sludge precipitated in the secondary sedimentation tank flows back to the anaerobic unit, the residual sludge is discharged, and a connecting pipeline of the moving bed biomembrane tank and the coagulating sedimentation unit and a medicament adding pump are connected. The system can improve the sewage treatment efficiency, reasonably set and transform the existing biological functional zone according to the dividing condition, the water quality condition and the denitrification target of the existing biological nitrogen and phosphorus removal functional zone, particularly the required tank capacity of denitrification and nitrogen removal which can be met by the water inlet carbon source, and add the nitrogen removal functional zone with insufficient tank capacity to achieve the corresponding upgrading target.
Description
The technical field is as follows:
the invention belongs to the technical field of sewage treatment, and particularly relates to a system for upgrading and modifying a sewage treatment plant under the condition of limited capacity of a biological denitrification tank and an operation method.
Background art:
with the continuous development of social economy and the continuous improvement of living conditions of people, people have higher requirements on water environment, the improvement of the water environment quality is more and more urgent and more important, and sewage treatment plants implement higher and higher emission standards. In recent years, the upgrading of sewage treatment plants is a hot spot of sewage treatment, city and key drainage basin such as Beijing, Tianjin, nido lake, Taihu lake and Dian Ching are issued and implemented successively and are more strict local discharge standard than the national standard of pollutant discharge standard of urban sewage treatment plant (GB18918-2002), and the national sewage treatment plants start a new upgrading transformation from GB18918-2002 primary B to primary A or from primary B and primary A to more strict local standard.
The sewage treatment plant is upgraded to primary A from GB18918-2002 primary B, or upgraded to a stricter local standard from primary B and primary A, most of the sewage treatment plants face the problems of insufficient capacity of a biological denitrification and dephosphorization tank and insufficient denitrification carbon source of a higher standard, and the capacity of the biological tank needs to be enlarged or the sewage treatment capacity needs to be reduced and an external carbon source needs to be added to meet the higher nitrogen emission requirement. Expansion of the biological pond is generally a preferred option given the unlimited floor space of the wastewater treatment plant. According to the existing biological tank capacity functional area division, the water quality of inlet water, the nitrogen and phosphorus removal requirement target and other conditions, the operation and maintenance are convenient and the like, the optimal capacity expansion scheme is selected, so that the technical and economic performance is better under the condition of meeting the standard-improvement water quality target, and the better efficiency of the standard-improvement transformation of the sewage treatment plant is achieved.
The invention content is as follows:
the invention aims to provide a system for upgrading and transforming a sewage treatment plant under the condition of limited capacity of a biological denitrification tank, which can improve the sewage treatment efficiency, reasonably set and transform the existing biological functional zone according to the division condition, the water quality condition and the denitrification target of the existing biological denitrification and dephosphorization functional zone, particularly the tank capacity required by denitrification and the like which can be met by an inlet carbon source, and add the denitrification functional zone with insufficient tank capacity to achieve the corresponding upgrading target.
It is another object of the present invention to provide a method for operating the above system for upgrading a sewage treatment plant with a limited capacity of a biological denitrification tank.
As conceived above, the technical scheme of the invention is as follows: the utility model provides a system that is used for sewage treatment plant to carry mark transformation under biological denitrification pond capacity limit which characterized in that: comprises an anaerobic unit, an anoxic unit, an aerobic unit, a secondary sedimentation tank, a moving bed biomembrane tank and a coagulating sedimentation unit which are connected in sequence; the mixed liquid of the aerobic unit flows back to the anoxic unit, the sludge precipitated in the secondary sedimentation tank flows back to the anaerobic unit, the residual sludge is discharged, and a connecting pipeline of the moving bed biomembrane tank and the coagulating sedimentation unit and a medicament adding pump are connected.
And the moving bed biomembrane tank is filled with suspended filler, and the adding rate of the suspended filler is 35-55% of the tank volume.
And an interception device for intercepting the filler is arranged at the outflow position of the moving bed biofilm tank.
The moving bed biomembrane pond adopts an anoxic moving bed biomembrane pond, and an external carbon source adding pump is connected on a pipeline connected with the secondary sedimentation tank.
The moving bed biological membrane tank is formed by connecting an aerobic moving bed biological membrane tank and an anoxic moving bed biological membrane tank, an external carbon source feeding pump is connected to a connecting pipeline of the aerobic moving bed biological membrane tank and the anoxic moving bed biological membrane tank, and nitrified liquid in the aerobic moving bed biological membrane tank can flow back to the anoxic unit.
The moving bed biological membrane tank adopts an aerobic moving bed biological membrane tank, the nitrifying liquid in the aerobic moving bed biological membrane tank flows back to the anoxic unit, and an external carbon source feeding pump is connected to a connecting pipeline of the anaerobic unit and the anoxic unit.
The coagulating sedimentation unit can adopt a conventional coagulating sedimentation, a high-density clarification tank and a magnetic coagulating clarification tank.
And the water outlet end of the coagulating sedimentation unit is connected with the filtering unit.
And plug flow, fluidization and mixing facilities are arranged in the anoxic moving bed biomembrane tank.
The aerobic moving bed biomembrane pond is internally provided with an aerator or an aerator and a fluidization facility.
The operation method of the system for upgrading and transforming the sewage treatment plant under the condition of limited capacity of the biological denitrification tank comprises the following steps:
firstly, the treated sewage and the return sludge enter an anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge release phosphorus by utilizing available carbon sources in the raw sewage;
secondly, the effluent of the anaerobic unit enters an anoxic unit, and simultaneously the mixed liquor of the aerobic unit also flows back to the anoxic unit, and denitrification is performed in the anoxic unit to perform biological denitrification;
thirdly, the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit to remove ammonia nitrogen;
fourthly, the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, part of the precipitated sludge flows back to the anaerobic unit, the rest sludge is discharged, and the precipitated effluent enters a moving bed biomembrane tank unit;
fifthly, enabling the effluent of the secondary sedimentation tank to take the denitrification or nitrification function by attached microorganisms in the moving bed biomembrane tank;
A. when the carbon source of the inlet water is not enough to meet the carbon source required by denitrification and the additional carbon source is required for biological denitrification, the existing biological tank firstly meets the tank capacity required by biological phosphorus removal and the nitrogen source of the inlet water, and when the surplus part can meet the requirement of nitrification, the moving bed biological membrane tank adopts an anoxic moving bed biological membrane tank to make up the tank capacity required by the nitrogen removal of the additional carbon source;
B. when the existing biological tank firstly meets the tank capacity required by biological phosphorus removal and water inlet carbon source denitrification, and the redundant part cannot meet the requirement of nitrification, the moving bed biological membrane tank is formed by connecting an aerobic moving bed biological membrane tank and an anoxic moving bed biological membrane tank, so that the tank capacity for insufficient nitrification and the tank capacity required by additional carbon source denitrification are respectively compensated, and the nitrified liquid in the aerobic moving bed biological membrane tank can flow back to the anoxic unit;
C. when the carbon source of inlet water is rich enough to meet the carbon source required by denitrification, the existing biological tank first meets the requirements of biological phosphorus removal and denitrification, the redundant part is the capacity of the nitrification tank, the moving bed biological membrane tank adopts an aerobic moving bed biological membrane tank to make up the tank capacity insufficient in nitrification, and the nitrification liquid in the aerobic moving bed biological membrane tank flows back to the anoxic unit;
sixthly, the effluent of the moving bed biomembrane pond enters a coagulating sedimentation unit, and a coagulant or a coagulant and a coagulant aid are added for coagulation and sedimentation, so that COD, SS and TP are further removed;
and discharging the coagulating sedimentation effluent.
The hydraulic retention time of the anoxic moving bed biomembrane pond is 30-90 min.
The hydraulic retention time of the aerobic moving bed biomembrane pool is 30-90 min.
The invention has the following technical advantages and positive effects:
1. aiming at the part with insufficient capacity of a denitrification tank in the existing activated sludge biological treatment system, the invention adopts a biomembrane full-membrane treatment process, under the aerobic and organic matter-poor environmental condition or the anoxic environment with the addition of a carbon source, the specificity of microorganisms attached to the biomembrane is higher, the proportion of attached active microorganism nitrobacteria or denitrifying bacteria is high, the total amount of active organisms is high, the biological activity is high, the nitrification or denitrification efficiency is high, compared with the activated sludge process or the activated sludge and biomembrane composite process, the required occupied area is the minimum under the condition of reaching the same nitrification or denitrification effect, and the scaling, modification and expansion can save the occupied area.
2. The microorganism attached to the treatment process of the biomembrane full membrane method has higher specificity and bioactivity than suspended microorganism and suspended and attached mixed microorganism, the denitrification rate and the denitrification efficiency of the anoxic biomembrane full membrane method are high, and the utilization efficiency of the added carbon source is high. Under the condition of removing the same nitrate nitrogen, compared with an activated sludge process or an activated sludge and biomembrane composite process, the anoxic denitrification treatment process adopting the biomembrane full membrane method saves carbon sources and can reduce consumption. Therefore, when the biological denitrification tank is insufficient and needs to be added with an external carbon source, the anoxic biological membrane full-membrane method unit is independently added, compared with the existing activated sludge method biological treatment system in which the anoxic tank is expanded or the existing biological anoxic unit is added with suspended filler to form the activated sludge and biological membrane composite process, the denitrification efficiency is higher, and the carbon source can be saved.
3. Aiming at the part with insufficient capacity of the denitrification tank of the biological tank by the active sludge method, the capacity expansion by adopting the moving bed biological membrane full-membrane method treatment process can meet the standard improvement requirement. Because the invention has the anaerobic unit, the anoxic unit, the aerobic unit and the secondary sedimentation tank at the front end of the moving bed biomembrane tank, compared with the existing upgrading and reforming system and method which directly reform the activated sludge method into the moving bed biomembrane full membrane method without expanding the volume, the invention has little influence by the fluctuation of the quality of the water from the sewage treatment plant, especially the height of suspended matters, and has more stable treatment effect and effluent.
4. Compared with fixed bed processes such as a denitrification filter, an aeration biological filter and the like, the invention has more flexibility and elasticity in the aspects of treatment capacity, treatment effect and operation management, and is simpler and more convenient. On one hand, the filler in the moving bed is in a fully fluidized state, the water to be treated is fully contacted with the filler, the mass transfer effect is good, meanwhile, the filler is fully fluidized to accelerate the falling and updating of the biological membrane, and the high activity of the biological membrane is ensured; on the other hand, parameters such as aeration quantity, carbon source adding quantity and the like can be flexibly regulated and controlled according to the ammonia nitrogen and nitrate nitrogen concentration and nitrogen discharge standard of the effluent of the front-end secondary sedimentation tank, the attached biomass of the carrier biomembrane in a fluidized state is dynamically regulated along with the adjustment, the flexibility of removing ammonia nitrogen by nitrification and denitrifying amount is large, and the phenomenon that the biomass is too much due to overhigh water inlet load in a fixed bed process and the blockage needs frequent back washing can not occur; moreover, the moving bed biomembrane pool is slightly influenced by the height and the volatility of the secondary precipitated water suspension at the front end, and the problems that the blockage caused by overhigh suspension needs frequent back washing, further the influence on carrier biofilm formation and biomass is caused, the treatment effect is unstable and the like can not occur; and finally, the moving bed biomembrane pond has simple structure, does not need facilities such as uniform water distribution, gas distribution, back flush and the like, and has simpler operation.
Description of the drawings:
FIG. 1 is a schematic diagram of a process flow of denitrification in a moving bed biomembrane pond by using an anoxic moving bed biomembrane pond unit, wherein the existing biomembrane pond can meet the requirements of biological phosphorus removal and nitrification but cannot completely meet the requirements of denitrification in upgrading and reconstruction of the invention;
FIG. 2 is a schematic view of a process flow of an aerobic moving bed biomembrane pond and an anoxic moving bed biomembrane pond for nitrification and denitrification respectively in a moving bed biomembrane pond, wherein the conventional biomembrane pond cannot completely meet the requirements of denitrification and nitrification in upgrading and reconstruction of the invention;
FIG. 3 is a schematic diagram of a process flow in which the existing biological tank can meet the requirements of biological phosphorus removal and denitrification and cannot completely meet the requirements of nitrification in upgrading and modification of the invention, and an aerobic moving bed biological membrane tank unit is adopted in the moving bed biological membrane tank for nitrification.
The specific implementation mode is as follows:
as shown in fig. 1-3: a system for upgrading and transforming a sewage treatment plant under the condition of limited capacity of a biological denitrification tank comprises an anaerobic unit, an anoxic unit, an aerobic unit, a secondary sedimentation tank, a moving bed biomembrane tank and a coagulating sedimentation unit which are sequentially connected; the mixed liquid of the aerobic unit flows back to the anoxic unit, the sludge precipitated in the secondary sedimentation tank flows back to the anaerobic unit, the residual sludge is discharged, and a connecting pipeline of the moving bed biomembrane tank and the coagulating sedimentation unit is connected with a medicament adding pump. The coagulating sedimentation unit can adopt conventional coagulating sedimentation, high density clarification tank, magnetism coagulating sedimentation tank, and its water outlet end connects the filter unit, and coagulating sedimentation goes out water and can further get rid of guarantee high standard discharge up to standard such as SS through the filter unit. And the moving bed biomembrane pond is filled with suspended fillers, the adding rate of the suspended fillers is 35-55% of the pond capacity, and an interception device for intercepting the fillers is arranged at the outflow part of the moving bed biomembrane pond.
As shown in fig. 1: the moving bed biomembrane pond adopts an anoxic moving bed biomembrane pond, and an external carbon source adding pump is connected on a pipeline connected with the secondary sedimentation tank.
As shown in fig. 2: the moving bed biological membrane tank is formed by connecting an aerobic moving bed biological membrane tank and an anoxic moving bed biological membrane tank, an external carbon source feeding pump is connected to a connecting pipeline of the aerobic moving bed biological membrane tank and the anoxic moving bed biological membrane tank, and nitrified liquid in the aerobic moving bed biological membrane tank can flow back to the anoxic unit.
As shown in fig. 3: the moving bed biological membrane tank adopts an aerobic moving bed biological membrane tank, the nitrifying liquid in the aerobic moving bed biological membrane tank flows back to the anoxic unit, and an external carbon source feeding pump is connected to a connecting pipeline of the anaerobic unit and the anoxic unit.
And plug flow, fluidization and mixing facilities such as a propeller or a stirrer and the like are arranged in the anoxic moving bed biomembrane pond. The aerobic moving bed biomembrane pond is internally provided with an aerator or an aerator and a fluidization facility.
The system for upgrading and transforming the sewage treatment plant under the condition of limited capacity of the biological denitrification tank mainly aims at the condition that the sewage treatment plant executing the first-level B and first-level A discharge standards continues upgrading and the capacity of the biological denitrification and dephosphorization tank is insufficient and needs capacity expansion, and the operation method comprises the following steps:
firstly, the treated sewage and the return sludge enter an anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge release phosphorus by utilizing available carbon sources in the raw sewage;
secondly, the effluent of the anaerobic unit enters an anoxic unit, and simultaneously the mixed liquor of the aerobic unit also flows back to the anoxic unit, and denitrification is performed in the anoxic unit to perform biological denitrification;
thirdly, the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit to remove ammonia nitrogen;
fourthly, the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, part of the precipitated sludge flows back to the anaerobic unit, the rest sludge is discharged, and the precipitated effluent enters a moving bed biomembrane tank unit;
fifthly, enabling the effluent of the secondary sedimentation tank to take the denitrification or nitrification function by attached microorganisms in the moving bed biomembrane tank;
A. when the carbon source of the inlet water is not enough to meet the carbon source required by denitrification and the additional carbon source is required for biological denitrification, the existing biological tank firstly meets the tank capacity required by biological phosphorus removal and the nitrogen source of the inlet water, and when the surplus part can meet the requirement of nitrification, the moving bed biological membrane tank adopts an anoxic moving bed biological membrane tank to make up the tank capacity required by the nitrogen removal of the additional carbon source;
B. when the existing biological tank firstly meets the tank capacity required by biological phosphorus removal and water inlet carbon source denitrification, and the redundant part cannot meet the requirement of nitrification, the moving bed biological membrane tank is formed by connecting an aerobic moving bed biological membrane tank and an anoxic moving bed biological membrane tank, so that the tank capacity for insufficient nitrification and the tank capacity required by additional carbon source denitrification are respectively compensated, and the nitrified liquid in the aerobic moving bed biological membrane tank can flow back to the anoxic unit;
C. when the carbon source of inlet water is rich enough to meet the carbon source required by denitrification, the existing biological tank first meets the requirements of biological phosphorus removal and denitrification, the redundant part is the capacity of the nitrification tank, the moving bed biological membrane tank adopts an aerobic moving bed biological membrane tank to make up the tank capacity insufficient in nitrification, and the nitrification liquid in the aerobic moving bed biological membrane tank flows back to the anoxic unit;
sixthly, the effluent of the moving bed biomembrane pond enters a coagulating sedimentation unit, and a coagulant or a coagulant and a coagulant aid are added for coagulation and sedimentation, so that COD, SS and TP are further removed;
and seventhly, adding a coagulant or a coagulant aid and a coagulant aid into the coagulating sedimentation water to perform coagulation and sedimentation, further removing COD, SS and TP, and discharging the effluent. According to the discharge requirement of the standard, the coagulating sedimentation unit can be connected with a filtering unit, and coagulating sedimentation effluent can be further removed from SS and the like through the filtering unit to ensure high-standard discharge reaching the standard.
The invention is divided into the following situations in the concrete actual construction:
1. embodiment 1 (shown in fig. 1): the carbon source of the inlet water is not enough to meet the requirement of denitrification amount for improving the standard, and an additional carbon source is needed for biological denitrification. The existing biological tank is improved by upgrading, and the denitrification tank and the nitrification tank of the existing biological tank are insufficient in capacity. The existing biological pond can meet the requirements of biological phosphorus removal and water inlet carbon source nitrogen removal and nitrification, the existing biological pond is improved into anaerobic, anoxic and aerobic units, and an anoxic moving bed biological membrane pond unit is additionally arranged to make up the tank capacity required by additional carbon source nitrogen removal.
The specific operation steps are as follows: (1) sewage treated by the fine grid, the grit chamber and other facilities and returned sludge enter the anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge mainly utilize available carbon sources in the original sewage to release phosphorus; (2) the outflow of the anaerobic unit enters an anoxic unit, denitrification biological denitrification is carried out in the anoxic unit by utilizing a carbon source in the inflow water, and simultaneously the mixed liquor of the aerobic unit also flows back to the anoxic unit; (3) the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit; (4) the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, the precipitated sludge partially flows back to the anaerobic unit, and the residual sludge is discharged; (5) the effluent water after the precipitation of the secondary sedimentation tank enters an anoxic moving bed biomembrane tank, denitrifying bacteria are attached to the anoxic moving bed biomembrane tank, and denitrification is carried out by utilizing an external carbon source; (6) and (3) leading the effluent of the anoxic moving bed biomembrane pond to enter a coagulating sedimentation unit, adding a coagulant or a coagulant and a coagulant aid for coagulating and precipitating, further removing COD, SS and TP, and discharging the effluent. According to the discharge requirement of the standard, the coagulating sedimentation unit can be connected with a filtering unit, and coagulating sedimentation effluent can be further removed from SS and the like through the filtering unit to ensure high-standard discharge reaching the standard.
2. Embodiment 2 (shown in fig. 1): the carbon source of the inlet water is not enough to meet the requirement of denitrification amount for improving the standard, and an additional carbon source is needed for biological denitrification. The existing biological tank is improved by upgrading, and the denitrification tank and the nitrification tank of the existing biological tank are insufficient in capacity. The anaerobic tank capacity of the existing biological tank can meet the biological phosphorus removal requirement required by the standard improvement, or the existing biological tank is not provided with an anaerobic functional area/unit, but the tank capacity of the separated denitrification part can meet the requirement. The denitrification tank capacity can not meet the required tank capacity for denitrification of the carbon source of the inlet water, the existing part of the tank capacity separated and transformed from the aerobic functional area/unit is anoxic, the insufficient tank capacity for denitrification of the carbon source of the inlet water is met, and the separated aerobic tank capacity can also meet the required tank capacity for nitrification. The existing biological tank is improved into an anaerobic unit, an anoxic unit and an aerobic unit, and an anoxic moving bed biological membrane tank unit is additionally arranged to make up for the tank capacity required by denitrification with an external carbon source.
The specific operation steps are as follows: (1) sewage treated by the fine grid, the grit chamber and other facilities and returned sludge enter the anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge mainly utilize available carbon sources in the original sewage to release phosphorus; (2) the outflow of the anaerobic unit enters an anoxic unit, denitrification biological denitrification is carried out in the anoxic unit by utilizing a carbon source in the inflow water, and simultaneously the mixed liquor of the aerobic unit also flows back to the anoxic unit; (3) the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit; (4) the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, the precipitated sludge partially flows back to the anaerobic unit, and the residual sludge is discharged; (5) the effluent water after the precipitation of the secondary sedimentation tank enters an anoxic moving bed biomembrane tank, denitrifying bacteria are attached to the anoxic moving bed biomembrane tank, and denitrification is carried out by utilizing an external carbon source; (6) and (3) leading the effluent of the anoxic moving bed biomembrane pond to enter a coagulating sedimentation unit, adding a coagulant or a coagulant and a coagulant aid for coagulating and precipitating, further removing COD, SS and TP, and discharging the effluent. According to the discharge requirement of the standard, the coagulating sedimentation unit can be connected with a filtering unit, and coagulating sedimentation effluent can be further removed from SS and the like through the filtering unit to ensure high-standard discharge reaching the standard.
3. Embodiment 3 (shown in fig. 2): the carbon source of the inlet water is not enough to meet the requirement of denitrification amount for improving the standard, and an additional carbon source is needed for biological denitrification. The problems of insufficient capacity of a denitrification tank and sufficient capacity of a nitrification tank of the existing biological tank are solved by upgrading and reconstructing. The anaerobic tank capacity of the existing biological tank can meet the biological phosphorus removal requirement required by the standard improvement, or the existing biological tank is not provided with an anaerobic functional area/unit, but the tank capacity of the separated denitrification part can meet the requirement. The denitrification tank capacity can not meet the required tank capacity for denitrification of the carbon source of the inlet water, and the existing aerobic functional area/unit is divided and transformed into an anoxic functional unit to meet the insufficient tank capacity for denitrification of the carbon source of the inlet water, but the divided aerobic area/unit can not meet the required tank capacity for nitrification. The existing biological tank is arranged and modified into an anaerobic unit, an anoxic unit and an aerobic unit, and the aerobic moving bed biological membrane tank and the anoxic moving bed biological membrane tank are additionally arranged to respectively make up for the insufficient nitrification tank capacity and the tank capacity required by denitrification with an external carbon source after the aerobic functional area/unit is separated.
The specific operation steps are as follows: (1) sewage treated by the fine grid, the grit chamber and other facilities and returned sludge enter the anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge mainly utilize available carbon sources in the original sewage to release phosphorus; (2) the effluent of the anaerobic unit enters an anoxic unit, denitrification biological denitrification is carried out in the anoxic unit by utilizing a carbon source in the inlet water, simultaneously the mixed liquor of the aerobic unit also flows back to the anoxic unit, and the nitrified liquor of the aerobic moving bed biomembrane pond unit flows back to the anoxic unit or does not flow back according to the condition of the inlet carbon source and the denitrification requirement; (3) the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit; (4) the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, the precipitated sludge partially flows back to the anaerobic unit, and the residual sludge is discharged; (5) the effluent water after the secondary sedimentation tank is precipitated enters an aerobic moving bed biomembrane tank, nitrifying bacteria are attached to the aerobic moving bed biomembrane tank for nitrification, and the requirement of ammonia nitrogen discharge is met; (6) the effluent of the aerobic moving bed biomembrane pool enters an anoxic moving bed biomembrane pool, denitrifying bacteria are attached to the anoxic moving bed biomembrane pool, and denitrification is carried out by utilizing an external carbon source; (7) and (3) leading the effluent of the anoxic moving bed biomembrane pond to enter a coagulating sedimentation unit, adding a coagulant or a coagulant and a coagulant aid for coagulating and precipitating, further removing COD, SS and TP, and discharging the effluent. According to the discharge requirement of the standard, the coagulating sedimentation unit can be connected with a filtering unit, and coagulating sedimentation effluent can be further removed from SS and the like through the filtering unit to ensure high-standard discharge reaching the standard.
4. Embodiment 4 (shown in fig. 3): the influent carbon source can meet the requirement of denitrification amount required by the standard improvement without adding an external carbon source. The problems of insufficient capacity of a denitrification tank and sufficient capacity of a nitrification tank of the existing biological tank are solved by upgrading and reconstructing. The anaerobic tank capacity of the existing biological tank can meet the biological phosphorus removal requirement required by the standard improvement, or the existing biological tank is not provided with an anaerobic functional area/unit, but the tank capacity of the separated denitrification part can meet the requirement. The aerobic functional area/unit of the existing biological tank is separated and transformed into an anoxic functional unit to meet the requirement of insufficient tank capacity of denitrification. The existing biological tank is arranged and modified into anaerobic, anoxic and aerobic units, and an aerobic moving bed biological membrane tank is additionally arranged to make up for the insufficient nitrification tank capacity after the aerobic functional zone/unit is separated.
The specific operation steps are as follows: (1) sewage treated by the fine grid, the grit chamber and other facilities and returned sludge enter the anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge mainly utilize available carbon sources in the original sewage to release phosphorus; (2) the effluent of the anaerobic unit enters an anoxic unit, denitrification biological denitrification is carried out in the anoxic unit by utilizing a carbon source in the inlet water, and simultaneously the mixed liquid of the aerobic unit and the nitrified liquid of the aerobic moving bed biomembrane pond both flow back to the anoxic unit; (3) the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit; (4) the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, the precipitated sludge partially flows back to the anaerobic unit, and the residual sludge is discharged; (5) the effluent water after the secondary sedimentation tank is precipitated enters an aerobic moving bed biological membrane tank unit, nitrifying bacteria are attached to the aerobic moving bed biological membrane tank for nitrification, and the ammonia nitrogen is ensured to meet the discharge requirement; (6) and (3) feeding the effluent of the aerobic moving bed biomembrane tank into a coagulating sedimentation unit, adding a coagulant or a coagulant and a coagulant aid for coagulating and precipitating, further removing COD, SS and TP, and discharging the effluent. According to the discharge requirement of the standard, the coagulating sedimentation unit can be connected with a filtering unit, and coagulating sedimentation effluent can be further removed from SS and the like through the filtering unit to ensure high-standard discharge reaching the standard.
5. Embodiment 5 (shown in fig. 3): the influent carbon source can meet the requirement of denitrification amount required by the standard improvement without adding an external carbon source. The problems of sufficient capacity of a denitrification tank and insufficient capacity of a nitrification tank of the existing biological tank are solved by upgrading and reconstructing. The anaerobic tank capacity of the existing biological tank can meet the biological phosphorus removal requirement required by the standard improvement, or the existing biological tank is not provided with an anaerobic functional area/unit, but the tank capacity of the separated denitrification part can meet the requirement. The existing biological tank is changed into an anaerobic unit, an anoxic unit and an aerobic unit, and an aerobic moving bed biological membrane tank is additionally arranged to make up for the insufficient tank capacity of nitrification.
The specific operation steps are as follows: (1) sewage treated by the fine grid, the grit chamber and other facilities and returned sludge enter the anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge mainly utilize available carbon sources in the original sewage to release phosphorus; (2) the effluent of the anaerobic unit enters an anoxic unit, denitrification biological denitrification is carried out in the anoxic unit by utilizing a carbon source in the inlet water, and simultaneously the mixed liquor of the aerobic unit and the nitrified liquor of the aerobic moving bed biomembrane pond also flow back to the anoxic unit; (3) the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit; (4) the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, the precipitated sludge partially flows back to the anaerobic unit, and the residual sludge is discharged; (5) the effluent water after the secondary sedimentation tank is precipitated enters an aerobic moving bed biomembrane tank, nitrifying bacteria are attached to the aerobic moving bed biomembrane tank for nitrification, and the standard discharge of ammonia nitrogen is guaranteed; (6) and (3) feeding the effluent of the aerobic moving bed biomembrane tank into a coagulating sedimentation unit, adding a coagulant or a coagulant and a coagulant aid for coagulating and precipitating, further removing COD, SS and TP, and discharging the effluent. According to the discharge requirement of the standard, the coagulating sedimentation unit can be connected with a filtering unit, and coagulating sedimentation effluent can be further removed from SS and the like through the filtering unit to ensure high-standard discharge reaching the standard.
6. Embodiment 6 (shown in fig. 1): the carbon source of the inlet water is not enough to meet the requirement of denitrification amount for improving the standard, and an additional carbon source is needed for biological denitrification. The problems of insufficient nitrification and denitrification tanks of the existing biological tanks are solved by upgrading and reconstructing. The anaerobic tank capacity of the existing biological tank can meet the biological phosphorus removal requirement required by the standard improvement, or the existing biological tank is not provided with an anaerobic functional area/unit, but the tank capacity of the separated denitrification part can meet the requirement. Part of the denitrification tank capacity is modified to meet the requirement of nitrification after nitrification, and the modified denitrification tank capacity can meet the requirement of denitrification of a water inlet carbon source. The existing biological tank is arranged and modified into an anaerobic unit, an anoxic unit and an aerobic unit, and an anoxic moving bed biological membrane tank is additionally arranged to make up for the tank capacity required by denitrification with an external carbon source.
The specific operation steps are as follows: (1) sewage treated by the fine grid, the grit chamber and other facilities and returned sludge enter the anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge mainly utilize available carbon sources in the original sewage to release phosphorus; (2) the outflow of the anaerobic unit enters an anoxic unit, denitrification biological denitrification is carried out in the anoxic unit by utilizing a carbon source in the inflow water, and simultaneously the mixed liquor of the aerobic unit also flows back to the anoxic unit; (3) the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit; (4) the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, the precipitated sludge partially flows back to the anaerobic unit, and the residual sludge is discharged; (5) the effluent water after the precipitation of the secondary sedimentation tank enters an anoxic moving bed biomembrane tank, denitrifying bacteria are attached to the anoxic moving bed biomembrane tank, and denitrification is carried out by utilizing an external carbon source; (6) and (3) leading the effluent of the anoxic moving bed biomembrane pond to enter a coagulating sedimentation unit, adding a coagulant or a coagulant and a coagulant aid for coagulating and precipitating, further removing COD, SS and TP, and discharging the effluent. According to the discharge requirement of the standard, the coagulating sedimentation unit can be connected with a filtering unit, and coagulating sedimentation effluent can be further removed from SS and the like through the filtering unit to ensure high-standard discharge reaching the standard.
7. Embodiment 7 (shown in fig. 2): the carbon source of the inlet water is not enough to meet the requirement of denitrification amount for improving the standard, and an additional carbon source is needed for biological denitrification. The problems of insufficient nitrification and denitrification tank capacity of the existing biological tank are improved by upgrading, and the existing denitrification tank capacity can meet the tank capacity required by denitrification of a water carbon source. The anaerobic tank capacity of the existing biological tank can meet the biological phosphorus removal requirement required by the standard improvement, or the existing biological tank is not provided with an anaerobic functional area/unit, but the tank capacity of the separated denitrification part can meet the requirement. The existing biological tank is arranged and modified into an anaerobic unit, an anoxic unit and an aerobic unit, and the aerobic moving bed biological membrane tank and the anoxic moving bed biological membrane tank are additionally arranged to respectively make up for the insufficient nitrification tank capacity and the tank capacity required by denitrification with an external carbon source.
The specific operation steps are as follows: (1) sewage treated by the fine grid, the grit chamber and other facilities and returned sludge enter the anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge mainly utilize available carbon sources in the original sewage to release phosphorus; (2) the effluent of the anaerobic unit enters an anoxic unit, denitrification biological denitrification is carried out in the anoxic unit by mainly utilizing a carbon source in the inlet water, meanwhile, the mixed liquor of the aerobic unit also flows back to the anoxic unit, and the nitrified liquor of the aerobic moving bed biomembrane pond unit flows back to the anoxic unit or does not flow back according to the condition of the inlet carbon source and the denitrification requirement; (3) the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit; (4) the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, the precipitated sludge partially flows back to the anaerobic unit, and the residual sludge is discharged; (5) the effluent water after the secondary sedimentation tank is precipitated enters an aerobic moving bed biomembrane tank, and nitrifying bacteria are attached to the aerobic moving bed biomembrane tank for nitrification to remove ammonia nitrogen; (6) the effluent of the aerobic moving bed biomembrane pool enters an anoxic moving bed biomembrane pool, denitrifying bacteria are attached to the anoxic moving bed biomembrane pool, and denitrification is carried out by utilizing an external carbon source; (7) and (3) leading the effluent of the anoxic moving bed biomembrane pond to enter a coagulating sedimentation unit, adding a coagulant or a coagulant and a coagulant aid for coagulating and precipitating, further removing COD, SS and TP, and discharging the effluent. According to the discharge requirement of the standard, the coagulating sedimentation unit can be connected with a filtering unit, and coagulating sedimentation effluent can be further removed from SS and the like through the filtering unit to ensure high-standard discharge reaching the standard.
8. Embodiment 8 (shown in fig. 2): the carbon source of the inlet water is not enough to meet the requirement of denitrification amount for improving the standard, and an additional carbon source is needed for biological denitrification. The problems of insufficient nitrification and denitrification tank capacity of the existing biological tank in upgrading and reconstruction are solved, and the existing denitrification tank capacity cannot meet the tank capacity required by denitrification of a carbon source of inlet water. The anaerobic tank capacity of the existing biological tank can meet the biological phosphorus removal requirement required by the standard improvement, or the existing biological tank is not provided with an anaerobic functional area/unit, but the tank capacity of the separated denitrification part can meet the requirement. The aerobic functional area/unit of the existing biological tank is separated and transformed into an anoxic functional area to meet the requirement of insufficient denitrification of the carbon source of the inlet water. The existing biological tank is improved into an anaerobic unit, an anoxic unit and an aerobic unit, and the aerobic moving bed biological membrane tank and the anoxic moving bed biological membrane tank are additionally arranged to respectively make up for the insufficient nitrification tank capacity and the tank capacity required by the denitrification of an external carbon source.
The specific operation steps are as follows: (1) sewage treated by the fine grid, the grit chamber and other facilities and returned sludge enter the anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge mainly utilize available carbon sources in the original sewage to release phosphorus; (2) the effluent of the anaerobic unit enters an anoxic unit, denitrification biological denitrification is carried out by utilizing a carbon source in inlet water in the anoxic unit, meanwhile, the mixed liquor of the aerobic unit also flows back to the anoxic unit, and the nitrified liquor of the aerobic moving bed biomembrane pond unit flows back to the anoxic unit or does not flow back according to the condition of the inlet carbon source and the denitrification requirement; (3) the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit; (4) the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, the precipitated sludge partially flows back to the anaerobic unit, and the residual sludge is discharged; (5) the effluent water after the secondary sedimentation tank is precipitated enters an aerobic moving bed biomembrane tank, nitrifying bacteria are attached to the aerobic moving bed biomembrane tank for nitrification, and ammonia nitrogen is removed; (6) the effluent of the aerobic moving bed biomembrane pool enters an anoxic moving bed biomembrane pool, denitrifying bacteria are attached to the anoxic moving bed biomembrane pool, and denitrification is carried out by utilizing an external carbon source; (7) and (3) enabling the effluent of the anoxic moving bed biomembrane pond to enter a coagulating sedimentation unit and the like, adding a coagulant or a coagulant and a coagulant aid for coagulating and precipitating, further removing COD (chemical oxygen demand), SS (suspended solids) and TP (total suspended solids) and discharging effluent. According to the discharge requirement of the standard, the coagulating sedimentation unit can be connected with a filtering unit, and coagulating sedimentation effluent can be further removed from SS and the like through the filtering unit to ensure high-standard discharge reaching the standard.
In each embodiment, the hydraulic retention time of the anoxic moving bed biomembrane pond is 30-90 min, the hydraulic retention time of the aerobic moving bed biomembrane pond is 30-90 min, and no chemical phosphorus removal agent is added to the moving bed biomembrane pond, the front-end biological unit and the secondary sedimentation tank.
The above embodiments are only preferred embodiments of the present invention, and are not intended to be limiting, and modifications and equivalents thereof that may be made by those skilled in the art based on the spirit and scope of the present invention are within the scope of the present invention.
Claims (13)
1. The utility model provides a system that is used for sewage treatment plant to carry mark transformation under biological denitrification pond capacity limit which characterized in that: comprises an anaerobic unit, an anoxic unit, an aerobic unit, a secondary sedimentation tank, a moving bed biomembrane tank and a coagulating sedimentation unit which are connected in sequence; the mixed liquid of the aerobic unit flows back to the anoxic unit, the sludge precipitated in the secondary sedimentation tank flows back to the anaerobic unit, the residual sludge is discharged, and a connecting pipeline of the moving bed biomembrane tank and the coagulating sedimentation unit and a medicament adding pump are connected.
2. The system for upgrading of a sewage treatment plant with limited biological denitrification tank capacity according to claim 1, characterized in that: and the moving bed biomembrane tank is filled with suspended filler, and the adding rate of the suspended filler is 35-55% of the tank volume.
3. The system for upgrading of a sewage treatment plant with limited biological denitrification tank capacity according to claim 1, characterized in that: and an interception device for intercepting the filler is arranged at the outflow position of the moving bed biofilm tank.
4. The system for upgrading of a sewage treatment plant with limited biological denitrification tank capacity according to claim 1, characterized in that: the moving bed biomembrane pond adopts an anoxic moving bed biomembrane pond, and an external carbon source adding pump is connected on a pipeline connected with the secondary sedimentation tank.
5. The system for upgrading of a sewage treatment plant with limited biological denitrification tank capacity according to claim 1, characterized in that: the moving bed biological membrane tank is formed by connecting an aerobic moving bed biological membrane tank and an anoxic moving bed biological membrane tank, an external carbon source feeding pump is connected to a connecting pipeline of the aerobic moving bed biological membrane tank and the anoxic moving bed biological membrane tank, and nitrified liquid in the aerobic moving bed biological membrane tank can flow back to the anoxic unit.
6. The system for upgrading of a sewage treatment plant with limited biological denitrification tank capacity according to claim 1, characterized in that: the moving bed biological membrane tank adopts an aerobic moving bed biological membrane tank, the nitrifying liquid in the aerobic moving bed biological membrane tank flows back to the anoxic unit, and an external carbon source feeding pump is connected to a connecting pipeline of the anaerobic unit and the anoxic unit.
7. The system for upgrading of a sewage treatment plant with limited biological denitrification tank capacity according to claim 1, characterized in that: the coagulating sedimentation unit can adopt a conventional coagulating sedimentation, a high-density clarification tank and a magnetic coagulating clarification tank.
8. The system for upgrading of a sewage treatment plant with limited biological denitrification tank capacity according to claim 1, characterized in that: and the water outlet end of the coagulating sedimentation unit is connected with the filtering unit.
9. The system for upgrading of a sewage treatment plant with limited biological denitrification tank capacity according to claim 4, characterized in that: and plug flow, fluidization and mixing facilities are arranged in the anoxic moving bed biomembrane tank.
10. The system for upgrading a sewage treatment plant with limited biological denitrification tank capacity according to claim 5 or 6, characterized in that: the aerobic moving bed biomembrane pond is internally provided with an aerator or an aerator and a fluidization facility.
11. A method of operating a system for upgrading a sewage treatment plant with limited biological denitrification basin capacity according to claims 1-6, characterized in that: the method comprises the following steps:
firstly, the treated sewage and the return sludge enter an anaerobic unit, a phosphorus release effect is generated in the anaerobic unit, and phosphorus release bacteria in the activated sludge release phosphorus by utilizing available carbon sources in the raw sewage;
secondly, the effluent of the anaerobic unit enters an anoxic unit, and simultaneously the mixed liquor of the aerobic unit also flows back to the anoxic unit, and denitrification is performed in the anoxic unit to perform biological denitrification;
thirdly, the effluent of the anoxic unit enters an aerobic unit, and nitrification is carried out in the aerobic unit to remove ammonia nitrogen;
fourthly, the effluent of the aerobic unit enters a secondary sedimentation tank for mud-water separation, part of the precipitated sludge flows back to the anaerobic unit, the rest sludge is discharged, and the precipitated effluent enters a moving bed biomembrane tank unit;
fifthly, enabling the effluent of the secondary sedimentation tank to take the denitrification or nitrification function by attached microorganisms in the moving bed biomembrane tank;
A. when the carbon source of the inlet water is not enough to meet the carbon source required by denitrification and the additional carbon source is required for biological denitrification, the existing biological tank firstly meets the tank capacity required by biological phosphorus removal and the nitrogen source of the inlet water, and when the surplus part can meet the requirement of nitrification, the moving bed biological membrane tank adopts an anoxic moving bed biological membrane tank to make up the tank capacity required by the nitrogen removal of the additional carbon source;
B. when the existing biological tank firstly meets the tank capacity required by biological phosphorus removal and water inlet carbon source denitrification, and the redundant part cannot meet the requirement of nitrification, the moving bed biological membrane tank is formed by connecting an aerobic moving bed biological membrane tank and an anoxic moving bed biological membrane tank, so that the tank capacity for insufficient nitrification and the tank capacity required by additional carbon source denitrification are respectively compensated, and the nitrified liquid in the aerobic moving bed biological membrane tank can flow back to the anoxic unit;
C. when the carbon source of inlet water is rich enough to meet the carbon source required by denitrification, the existing biological tank first meets the requirements of biological phosphorus removal and denitrification, the redundant part is the capacity of the nitrification tank, the moving bed biological membrane tank adopts an aerobic moving bed biological membrane tank to make up the tank capacity insufficient in nitrification, and the nitrification liquid in the aerobic moving bed biological membrane tank flows back to the anoxic unit;
sixthly, the effluent of the moving bed biomembrane pond enters a coagulating sedimentation unit, and a coagulant or a coagulant and a coagulant aid are added for coagulation and sedimentation, so that COD, SS and TP are further removed;
and discharging the coagulating sedimentation effluent.
12. The method of claim 11 for operating a system for benchmarking a sewage treatment plant with a limited biological denitrification tank capacity, wherein: the hydraulic retention time of the anoxic moving bed biomembrane pond is 30-90 min.
13. The method of claim 11 for operating a system for benchmarking a sewage treatment plant with a limited biological denitrification tank capacity, wherein: the hydraulic retention time of the aerobic moving bed biomembrane pool is 30-90 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010465347.9A CN111606512A (en) | 2020-05-28 | 2020-05-28 | System for upgrading and modifying sewage treatment plant under condition of limited capacity of biological denitrification tank and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010465347.9A CN111606512A (en) | 2020-05-28 | 2020-05-28 | System for upgrading and modifying sewage treatment plant under condition of limited capacity of biological denitrification tank and operation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111606512A true CN111606512A (en) | 2020-09-01 |
Family
ID=72196357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010465347.9A Pending CN111606512A (en) | 2020-05-28 | 2020-05-28 | System for upgrading and modifying sewage treatment plant under condition of limited capacity of biological denitrification tank and operation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111606512A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112142203A (en) * | 2020-09-16 | 2020-12-29 | 北控水务(中国)投资有限公司 | Carbon source screening device and method for enhancing denitrification in sewage treatment |
| CN114212875A (en) * | 2021-12-20 | 2022-03-22 | 北京首创生态环保集团股份有限公司 | System and method suitable for activated sludge process upgrading and reconstruction |
-
2020
- 2020-05-28 CN CN202010465347.9A patent/CN111606512A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112142203A (en) * | 2020-09-16 | 2020-12-29 | 北控水务(中国)投资有限公司 | Carbon source screening device and method for enhancing denitrification in sewage treatment |
| CN114212875A (en) * | 2021-12-20 | 2022-03-22 | 北京首创生态环保集团股份有限公司 | System and method suitable for activated sludge process upgrading and reconstruction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105585122B (en) | A kind of high-ammonia nitrogen low C/N is than waste water treatment system and treatment process | |
| CN106277319B (en) | A kind of Bardenpho denitrification dephosphorization technique based on MBBR | |
| CN101244883B (en) | High-efficiency low-consumption retexture method for urban sewage | |
| CN110436704B (en) | Urban sewage treatment upgrading and reforming process based on anaerobic ammonia oxidation | |
| CN109160670B (en) | Denitrification method of municipal sewage denitrification filter based on short-cut denitrification and anaerobic ammonia oxidation | |
| CN100569669C (en) | Anaerobic-anoxic oxidation pitch technique denitrification dephosphorization device and method thereof | |
| CN103121754B (en) | A kind of denitrification dephosphorization technique | |
| CN103030250B (en) | Reinforced-denitrification MBR (membrane bioreactor) sewage treatment method | |
| CN105948251A (en) | Multistage A/O (anoxic/oxic) biomembrane-sludge activation coupled denitrification and dephosphorization device and application thereof | |
| CN101525207A (en) | Integrated pre-denitrification and denitrogenation biological filter sewerage treatment process | |
| CN108585385B (en) | MBBR sewage treatment system and treatment process | |
| CN107585863A (en) | A kind of complete mixed and gallery combined-type sewage biochemical processing method | |
| CN112607861B (en) | Process for treating municipal sewage by using excess sludge fermentation carbon source to strengthen denitrification dephosphorization, partial short-cut denitrification and anaerobic ammonia oxidation | |
| CN108083437A (en) | A kind of rural domestic sewage treating device and treatment process | |
| CN210915752U (en) | Compact MBBR and super-efficient separation coupled deep nitrogen and phosphorus removal treatment system | |
| CN111453944A (en) | Device for treating urban sewage by coupling carbon separation with mainstream anaerobic ammonium oxidation biological denitrification and operation method thereof | |
| CN112110615A (en) | Upgrading and reforming treatment process and system for urban sewage plant | |
| CN108383239B (en) | Integrated biological treatment process for shortcut nitrification anaerobic ammonia oxidation and phosphorus removal under intermittent aeration mode | |
| CN207877509U (en) | A kind of device of the intensified denitrification and dephosphorization of low-carbon-source sewage | |
| CN111606512A (en) | System for upgrading and modifying sewage treatment plant under condition of limited capacity of biological denitrification tank and operation method | |
| CN202688093U (en) | Improved A/O (anoxic/oxic) four-point section-water supply high-efficiency synchronous nitrogen and phosphorus removal device | |
| CN105198168A (en) | A2/O-MBR-biological contact oxidation pond dual-sludge high-efficiency denitrifying phosphorus removal device and method | |
| CN207845268U (en) | A kind of rural domestic sewage treating device | |
| CN110590077A (en) | Compact MBBR and super-efficient separation coupled deep nitrogen and phosphorus removal treatment system | |
| CN213895523U (en) | Processing system is reformed transform to mark of carrying of town sewage factory |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |