CN210620502U - Urban micro-polluted river water treatment system - Google Patents
Urban micro-polluted river water treatment system Download PDFInfo
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Abstract
The utility model relates to a city micro-pollution river water treatment system, this system include first oxygen deficiency pond, first good oxygen pond, middle oxygen release pond, second oxygen deficiency pond, the good oxygen pond of second, flocculation reaction tank, two heavy ponds and tail water treatment system. The utility model has simple operation flow, and can ensure that the treated micro-polluted water body reaches the IV-class water discharge standard (except total nitrogen) in the environmental quality standard of surface water (GB 3838-2002).
Description
Technical Field
The utility model belongs to environmental protection and treatment field, concretely relates to little polluted river water processing system in city.
Background
With the rapid development of modern economy, the river pollution problem is increasingly serious under the influence of industrial and urban wastewater, farmland surface runoff and other artificial factors. And with the continuous increase of urban population and the expansion of urban area range, the shortage of urban drainage facilities is highlighted, and the channel rivers in many urban areas of cities gradually become sewage receiving channels of urban sewage. Under the large environment of strengthening water environment treatment and construction in various cities in China, more and more ditch-surging sewage is finally intercepted and is conveyed to a sewage treatment plant for treatment, so that the pollution to a main flow domain is reduced.
The micro-polluted river water treatment has self specificity, belongs to a low-concentration micro-polluted water body compared with domestic sewage, has great difference in treatment process and treatment requirements, and can not apply the existing sewage treatment method and theory. The main characteristics of the generation, water quantity and water quality of the micro-polluted river water body are as follows: (1) the river sewage flow is large, and the flow change is obvious seasonal and periodic. Generally, the flow of the river channel is large in the rainy period in summer, and the flow of the river channel is small in the winter and spring, so that the seasonality is strong; the flow of the polluted river water is generally larger, and the treatment difficulty is increased; (2) the concentration of pollutants is low, the water quality index permanganate index is lower than 20mg/L on average, the ammonia nitrogen index is lower than 5mg/L on average, TN is lower than 10mg/L, TP is lower than 0.5mg/L, and the concentration is far lower than that of domestic sewage and industrial wastewater. (3) The river water system coverage is large, and the concentration change of the incoming water pollutants is large. Generally, the concentration of pollutants in the river in the dry season is highest, the concentration in the horizontal season is intermediate, and the concentration in the full season is lowest. (4) The river water body pollutants are complex in type, and not only contain pollutants such as nitrogen, phosphorus, organic matters and the like, but also comprise non-degradable pollutants and other toxic pollutants.
At present, the technical methods for treating the micro-polluted river water can be mainly divided into two types, namely a physical method and a chemical method. The physical methods mainly include a water-adjusting dilution method, a sediment dredging method and a mechanical aeration method.
1. Dilution with water
The water adjusting and diluting is to adjust the clear water outside the system by a manual method through building a gate and a pump station, increase the river flow speed, accelerate the replacement speed of the river water body, dilute the sewage cluster and recover the ecological function of the river. Compared with other technologies, the water adjusting and diluting technology has quick effect, small side effect and convenient implementation in conditional areas, such as plain river network areas such as Taihu lake watershed and the like; the technology can quickly dilute nitrogen, phosphorus and organic matters with high concentration in river water in a short period.
The disadvantages are as follows: (1) the dilution method by adjusting water has limited effect, although the quality of the regional water environment can be properly improved according to the conditions of the introduced water quantity and the water quality. The water regulation and dilution are performed by leading large water to discharge large water to improve the water environment, which is mainly aimed at treating the symptoms, but cannot treat the root causes. (2) The cost is very high. (3) May result in contamination of the downstream river water. (4) A suitable source of clean water is required.
2. Method for dredging sediment
Bottom mud pollution is an important source for pollution of most river water bodies in China at present. The dredged sediment can remove the nutritive salt and organic matters in the sediment and reduce the release of the nutritive salt of the sediment to the upper water body. The technology of sediment dredging has been widely used as an important measure in the comprehensive treatment of water environments. At present, dredging is applied to a plurality of urban rivers in China as an important method for water environment improvement, lakes such as Taihu lake, Dian lake and nested lake are also subjected to ecological dredging to treat eutrophication of water bodies, and a good effect is achieved.
The disadvantages are as follows: (1) disturbing bottom mud; the disturbance during dredging causes the sediment to suspend, and the nutrient salt in the sediment is released seriously, so that the intended effect of dredging cannot be achieved. (2) Re-migration of contaminating substances; the large quantities of dredged sediment associated with dredging need to be properly disposed of or otherwise are susceptible to secondary pollution. (3) Destruction of the benthic ecosystem; the benthic ecosystem is completely destroyed after the dredging of the sediment, and the ecosystem formed in years or even decades is difficult to repair and rebuild once the ecosystem is destroyed. (4) The cost is expensive; the sediment dredging engineering is hydraulic and civil engineering, and consumes a great deal of manpower, material resources and financial resources.
3. Mechanical aeration method
The river is enriched with oxygen through mechanical aeration to achieve the purpose of removing organic matters in the water body, and the technology can effectively remove the organic matter content, the odor such as stink and the like in the water body.
The disadvantages are as follows: (1) the continuous energy supply is needed, and the price is high; (2) the aeration machine needs to be placed in a river channel, and river navigation is affected.
The chemical method is mainly characterized in that coagulant, enzyme inhibitor and the like are added into polluted river water to flocculate and precipitate river pollutants and kill harmful microorganisms in water. The method is simple, effective and rapid in effect, and is widely applied to treatment of algal bloom and purification of drinking water.
The disadvantages are as follows: (1) easily causes secondary pollution. The added substance is a chemical reagent, which can change the water environment and poison certain aquatic organisms; (2) chemical reagents are expensive and not suitable for long-term use.
Disclosure of Invention
In order to solve the problems existing in the method for treating the urban micro-polluted water body, the utility model provides a system for treating the urban micro-polluted river water, which has reasonable conception and simple operation flow and can ensure that the treated micro-polluted water body reaches the IV-class water discharge standard (except total nitrogen) in the environmental quality standard of surface water (GB 3838-2002).
The utility model discloses a realize through following technical scheme:
the urban micro-polluted river water treatment system comprises a pretreatment system, a first anoxic tank, a first aerobic tank, a middle slow oxygen release tank, a second anoxic tank, a second aerobic tank, a flocculation reaction tank, a secondary sedimentation tank and a tail water treatment system; the water inlet of the first anoxic tank is connected with pretreated incoming water, the water outlet of the first anoxic tank is communicated with the water inlet of the first aerobic tank, the water outlet of the first aerobic tank is communicated with the water inlet of the middle slow oxygen release tank, the water outlet of the middle slow oxygen release tank is communicated with the water inlet of the second anoxic tank, the water outlet of the second anoxic tank is communicated with the water inlet of the second aerobic tank, the water outlet of the second aerobic tank is communicated with the water inlet of the flocculation reaction tank, the water outlet of the flocculation reaction tank is communicated with the water inlet of the secondary sedimentation tank, and the water outlet of the secondary sedimentation tank is connected with the tail water treatment system and is connected with an externally-discharged river channel through the tail water treatment system; biological fillers are filled in the first anoxic tank, the second anoxic tank, the first aerobic tank and the second aerobic tank; the first anoxic tank and the second anoxic tank are both provided with an anoxic tank flow impeller and an anoxic tank dissolved oxygen instrument; the first aerobic tank and the second aerobic tank are both provided with a microporous aerator and an aerobic tank dissolved oxygen instrument; the middle slow oxygen release pond is provided with a middle slow oxygen release pond flow impeller; the secondary sedimentation tank is provided with a sludge reflux pump.
The urban micro-polluted river water treatment system comprises: the processing system further comprises a remote control system; the anoxic tank flow impeller, the anoxic tank dissolved oxygen instrument, the microporous aerator, the aerobic tank dissolved oxygen instrument, the intermediate slow-release oxygen tank flow impeller and the sludge reflux pump are all electrically connected with the remote control system; the microporous aerator is connected with an external Roots blower and provides an air source by the external Roots blower; the external Roots blower is arranged in a device room of the sewage treatment station and is electrically connected with the remote control system.
The urban micro-polluted river water treatment system comprises: the remote control system comprises a programmable logic controller, a field switch, a camera, a control center switch and a local computer; the input end of the programmable logic controller is connected with a water pump, a pH monitor, a temperature monitor, a liquid level monitor and a pressure monitor which are arranged at the inner side of the sewage treatment station, and the output end of the programmable logic controller is electrically connected with the anoxic pond flow impeller, the anoxic pond dissolved oxygen instrument, the microporous aerator, the aerobic pond dissolved oxygen instrument, the Roots blower, the middle slow release oxygen pond flow impeller, the sludge reflux pump and the ultraviolet lamp; the anoxic pond flow impeller, the anoxic pond dissolved oxygen instrument, the microporous aerator, the aerobic pond dissolved oxygen instrument, the Roots blower, the middle slow release oxygen pond flow impeller, the sludge reflux pump and the ultraviolet lamp are all connected and communicated with the on-site exchanger; the camera is arranged in the sewage treatment station and is connected and communicated with the field switch, and the field industrial personal computer and the camera are connected and communicated with the control center switch through the field switch so as to transmit network data; and the field switch is connected and communicated with the local computer through the control center switch.
The urban micro-polluted river water treatment system comprises: the pretreatment system comprises a trash blocking dam, a water collecting dam and a grid adjusting tank.
The urban micro-polluted river water treatment system comprises: the secondary sedimentation tank is an inclined plate sedimentation tank, namely an inclined plate with an included angle of 60 degrees with the horizontal plane is arranged in the secondary sedimentation tank; the bottom of the secondary sedimentation tank is in a conical hopper shape, and the sludge reflux pump is arranged outside the conical hopper; the inlet of the sludge reflux pump is connected with the bottom of the conical hopper of the secondary sedimentation tank, and the outlet of the sludge reflux pump is connected with the first anoxic tank and the second anoxic tank.
The urban micro-polluted river water treatment system comprises: the tail water treatment system comprises a cloth filter and a disinfection tank; the cloth filter is a vertical fiber cloth filter; an ultraviolet lamp is arranged in the disinfection tank and electrically connected with the remote control system.
Advantageous effects
The utility model discloses city micro pollution river water processing system conceives rationally, operation flow is simple, through will nitrify/denitrification principle in step, biological contact oxidation theory combines together with theories such as the denitrification of tradition, through the adjustment control mode in order to reach the biological mud membrane symbiosis, pack the filler of certain quantity in biological contact oxidation pond promptly, utilize the oxygen of perching the biomembrane that attaches on the filler and abundant supply, through the biological oxidation effect, with the organic matter oxidative decomposition in the waste water, when realizing higher play water quality of water standard, good oxygen aeration stage (biological contact oxidation pond) HRT only has the half of traditional activated sludge method, the reducible 30% of prediction total aeration volume, it can reduce 25% to correspond operation power consumption cost. The biological contact oxidation concept is applied to the treatment of urban ditch micro-polluted water body, the effluent quality index COD is less than or equal to 30mg/L, BOD and less than or equal to 6mg/L, the ammonia nitrogen is less than or equal to 1.5mg/L, the total nitrogen is less than or equal to 1.5mg/L, and the total phosphorus is less than or equal to 0.3mg/L, thereby meeting the corresponding standard requirements of class IV water in GB3838-2002 surface water quality environmental quality standard.
Because urban ditches are distributed dispersedly, and the construction of the ditch micro-polluted water treatment equipment facility is limited by double restrictions of occupied positions and areas, the operation management cost and other limitations, in order to effectively operate the ditch micro-polluted water treatment equipment facility, an automatic remote control technology is urgently needed to realize. The method has the advantages that on one hand, technicians can timely monitor the production condition of the site, so that emergency treatment for dealing with the change of quality and water quantity of the ditch water and the real-time condition of field equipment or a production line can be known conveniently, and the site can be tracked and maintained in real time; on the other hand, micro-polluted water treatment information can be issued to society, supervision departments and the like in time. The field information and the management information are combined to establish a set of watershed water environment fully integrated, open and comprehensive automatic information platform, so that a watershed water environment comprehensive management system with wider significance is formed.
The utility model discloses a remote control system to the control of information such as each angle video information of remote processing website, technological instrument parameter, equipment running state, operating pressure, flow, electric quantity, under the necessary condition, can start and shut down through remote control system, can report to the police and maintain operations such as management to the processing station trouble in the operation process to realize unmanned on duty, improve maintenance efficiency.
Drawings
FIG. 1 is a schematic diagram of a city micro-polluted river water treatment system of the utility model;
fig. 2 is a control schematic diagram of the remote control system of the urban micro-polluted river water treatment system.
Detailed Description
As shown in figures 1 and 2, the utility model discloses urban micro-polluted river water treatment system sets up in sewage treatment station and includes pretreatment system, first oxygen deficiency pond 1, first good oxygen pond 2, middle oxygen release pond 3, second oxygen deficiency pond 4, second good oxygen pond 5, flocculation reaction tank 6, two heavy ponds 7, tail water treatment system 8 and remote control system 9.
The pretreatment system comprises a trash blocking dam, a water collecting dam, a grid adjusting tank and the like;
the water inlet of the first anoxic tank 1 is connected with pretreated incoming water, the water outlet of the first anoxic tank 1 is communicated with the water inlet of the first aerobic tank 2, the water outlet of the first aerobic tank 2 is communicated with the water inlet of the middle slow oxygen release tank 3, the water outlet of the middle slow oxygen release tank 3 is communicated with the water inlet of the second anoxic tank 4, the water outlet of the second anoxic tank 4 is communicated with the water inlet of the second aerobic tank 5, the water outlet of the second aerobic tank 5 is communicated with the water inlet of the flocculation reaction tank 6, the water outlet of the flocculation reaction tank 6 is communicated with the water inlet of the secondary sedimentation tank 7, and the water outlet of the secondary sedimentation tank 7 is connected with a tail water treatment system and is connected with an external river channel through the tail water treatment system.
The bottom parts of the first anoxic tank 1 and the second anoxic tank 4 are provided with anoxic tank flow impellers, and the upper parts are provided with anoxic tank dissolved oxygen instruments; wherein, biological fillers are filled in the first anoxic tank 1 and the second anoxic tank 4; the anoxic pond flow impeller and the anoxic pond dissolved oxygen meter are electrically connected with a programmable logic controller 91 of the remote control system 9.
The bottoms of the first aerobic tank 2 and the second aerobic tank 5 are provided with microporous aerators, and the upper parts of the first aerobic tank and the second aerobic tank are provided with aerobic tank dissolved oxygen meters; wherein, biological fillers are filled in the first aerobic tank 2 and the second aerobic tank 5; this micropore aerator is connected outside roots's fan and is provided the air supply by outside roots's fan, and this roots's fan is three leaves roots's fan and establishes in sewage treatment station equipment room, and this micropore aerator, good oxygen pond dissolved oxygen appearance and roots's fan all are connected with remote control system 9's programmable logic controller 91 electricity.
The bottom of the middle slow oxygen release pool 3 is provided with a middle slow oxygen release pool impeller; the middle slow oxygen release tank 3 has a buffer function, so that the transition between anoxic and aerobic states is more stable; the intermediate slow oxygen release pool impeller is electrically connected with a programmable logic controller 91 of a remote control system 9.
The flocculation tank 6 is configured to precipitate large particulate matters after flocculation reaction in a secondary sedimentation tank 7 by adding an appropriate amount of PAC (polyaluminium chloride) and PAM (polyacrylamide).
The secondary sedimentation tank 7 is an inclined plate sedimentation tank, namely an inclined plate forming an included angle of 60 degrees with the horizontal plane is arranged in the secondary sedimentation tank 7; wherein, the bottom of the secondary sedimentation tank 7 is cone-shaped, and a sludge reflux pump is arranged outside the cone-shaped; the inlet of the sludge reflux pump is connected with the bottom of the conical hopper of the secondary sedimentation tank 7, and the outlet of the sludge reflux pump is connected with the first anoxic tank 1 and the second anoxic tank 4; the sludge recirculation pump is also electrically connected to the programmable logic controller 91 of the remote control system 9.
The tail water treatment system 8 comprises a cloth filter and a disinfection tank; wherein the cloth filter is a vertical fiber cloth filter; the disinfection tank adopts ultraviolet light disinfection, namely an ultraviolet lamp is arranged in the disinfection tank; the uv lamp is electrically connected to a programmable logic controller 91 of the remote control system 9.
As shown in fig. 2, the remote control system 9 includes a programmable logic controller 91, a field switch 92, a camera 93, a control center switch 94, and a local computer 95.
The input end of the programmable logic controller 91 is connected with a water pump, a pH monitor, a temperature monitor, a liquid level monitor and a pressure monitor which are arranged at the inner side of the sewage treatment station, and the output end of the programmable logic controller 91 is electrically connected with an on-site industrial personal computer (namely an anoxic tank impeller, an anoxic tank dissolved oxygen instrument, a microporous aerator, an aerobic tank dissolved oxygen instrument, a Roots blower, a middle slow-release oxygen tank impeller, a sludge reflux pump and an ultraviolet lamp); the field industrial personal computer is connected with a field switch 92 for communication; the camera 93 is arranged in the sewage treatment station and is connected and communicated with the field switch 92, and the field industrial personal computer and the camera 93 are connected and communicated with the control center switch 94 through the field switch 92 to perform network data transmission; the site switch 92 is connected to and communicates with a local computer 95 via a control center switch 94; the local computer 95 is loaded with controlled end software, video monitoring software, industrial control software, and main control end software.
The remote control system 9 adopts an automatic operation remote control technology of 'internet + environmental protection (operation)', and carries out operation management control on each urban ditch micro-polluted water treatment site; information collection and auxiliary monitoring video of a plant station field end are realized by a field PLC (programmable logic controller 91) technical means, and monitoring and operation of a control end of an operation control center or mobile control ends such as a mobile phone and a tablet personal computer are realized by matching remote control software (namely controlled end software, video monitoring software, industrial control software and main control end software loaded on a local computer 95) through real-time transmission and conversion of internet technology.
The system of the present invention is further described below with specific embodiments:
example 1
Taking the micro-polluted gushing channel river water in a certain city in the north of the Yangtze river as an example, the initial survey water quality data of the river channel of the city is as follows: the concentration value of COD (chemical oxygen demand) is less than or equal to 150mg/l, the concentration value of SS (suspended substance) is less than or equal to 20mg/l, the concentration value of NH3-N (ammonia nitrogen) is less than or equal to 15mg/l, the concentration value of TP (total phosphorus) is less than or equal to 1.5mg/l, and the PH is 6-7. Combining the geographical position of the river, an underground sewage treatment station is arranged at a position at the upstream of the micro-river, a river inflow trash holding dam is lifted to a first anoxic tank 1 internally provided with biological fillers through a submersible pump after passing through a pretreatment system, and the dissolved oxygen in the first anoxic tank 1 is controlled within 0.5mg/l through an anoxic tank dissolved oxygen meter;
the effluent of the first anoxic tank 1 automatically flows into a first aerobic tank 2 internally provided with biological fillers, and the dissolved oxygen in the first aerobic tank 2 is controlled to be 2mg/l by an aerobic tank dissolved oxygen instrument;
the effluent of the first aerobic tank 2 automatically flows into a middle slow oxygen release tank 3 with a flow impeller arranged at the bottom;
the effluent of the middle slow oxygen release tank 3 automatically flows into a second anoxic tank 4 which is internally provided with biological filler and a flow driver, and the dissolved oxygen in the second anoxic tank 4 is controlled within 0.5mg/l by an anoxic tank dissolved oxygen instrument;
the effluent of the second anoxic tank 4 automatically flows into a second aerobic tank 5 which is internally provided with biological filler and the bottom of which is provided with a microporous aerator; the dissolved oxygen in the second aerobic tank 5 is controlled to be 2mg/l by an aerobic tank dissolved oxygen meter
The effluent of the second aerobic tank 5 automatically flows into a flocculation reaction tank 6, and a proper amount of PAC (polyaluminium chloride) with the concentration of 10 percent and PAM (polyacrylamide) with the concentration of 0.5 percent are added into the flocculation reaction tank 6 according to the change of water quality, and then the dosing flow is adjusted in real time according to the precipitation effect.
The effluent after flocculation in the flocculation reaction tank 6 enters a secondary sedimentation tank 7 for sedimentation;
the effluent of the secondary sedimentation tank 7 automatically flows into a tail water treatment system, and is discharged into a river channel after being treated by the cloth filter and the disinfection water tank.
The treated effluent can realize the effluent quality index COD less than or equal to 30mg/L, BOD less than or equal to 6mg/L, ammonia nitrogen less than or equal to 1.5mg/L and total phosphorus less than or equal to 0.3mg/L, and reaches the standard requirements of IV water (except total nitrogen) in GB3838-2002 surface water quality environmental quality standard. The micro-polluted river water treatment method has good adaptability to the micro-polluted river water, and the treated effluent meets the national discharge standard.
Example 2
Taking micro-polluted gushing river water in a certain city in the north of the Yangtze river, wherein the water quality data of the initial survey of the city river is as follows: the concentration value of COD is less than or equal to 120mg/l, the concentration value of SS is less than or equal to 18mg/l, the concentration value of NH3-N is less than or equal to 10mg/l, the concentration value of TP is less than or equal to 1.5mg/l, and the PH is 7-8.
Lifting the wastewater to a first anoxic tank 1 with biological filler inside by a submersible pump, and controlling the dissolved oxygen in the first anoxic tank 1 within 0.5mg/l by an anoxic tank dissolved oxygen instrument;
the effluent of the first anoxic tank 1 automatically flows into a first aerobic tank 2 internally provided with biological fillers, and the dissolved oxygen in the first aerobic tank 2 is controlled to be 3mg/l by an aerobic tank dissolved oxygen instrument;
the effluent of the first aerobic tank 2 automatically flows into a middle slow oxygen release tank 3 with a flow impeller arranged at the bottom;
the effluent of the middle slow oxygen release tank 3 automatically flows into a second anoxic tank 4 which is internally provided with biological filler and a flow driver, and the dissolved oxygen in the second anoxic tank 4 is controlled within 0.1mg/l by an anoxic tank dissolved oxygen instrument;
the effluent of the second anoxic tank 4 automatically flows into a second aerobic tank 5 which is internally provided with biological filler and the bottom of which is provided with a microporous aerator; the dissolved oxygen in the second aerobic tank 5 is controlled to be 4mg/l by an aerobic tank dissolved oxygen meter
The effluent of the second aerobic tank 5 automatically flows into a flocculation reaction tank 6, and a proper amount of PAC (polyaluminium chloride) with the concentration of 8% and PAM (polyacrylamide) with the concentration of 0.3% are added into the flocculation reaction tank 6 according to the change of water quality, so that the dosing flow is adjusted in real time according to the precipitation effect.
The effluent after flocculation in the flocculation reaction tank 6 enters a secondary sedimentation tank 7 for sedimentation;
the effluent of the secondary sedimentation tank 7 automatically flows into a tail water treatment system, and is discharged into a river channel after being treated by the cloth filter and the disinfection water tank.
The treated effluent can realize the effluent quality index COD less than or equal to 25mg/L, BOD less than or equal to 6mg/L, ammonia nitrogen less than or equal to 1.5mg/L and total phosphorus less than or equal to 0.3mg/L, and reaches the standard requirements of IV water (except total nitrogen) in GB3838-2002 surface water quality environment quality standard. The micro-polluted river water treatment method has good adaptability to the micro-polluted river water, and the treated effluent meets the national discharge standard.
Example 3
Taking micro-polluted gushing river water in a certain city in the north of the Yangtze river, wherein the water quality data of the initial survey of the city river is as follows: the concentration value of COD is less than or equal to 100mg/l, the concentration value of SS is less than or equal to 15mg/l, the concentration value of NH3-N is less than or equal to 8mg/l, the concentration value of TP is less than or equal to 1.0mg/l, and the PH is 6-8.
Lifting the wastewater to a first anoxic tank 1 with biological filler inside by a submersible pump, and controlling the dissolved oxygen in the first anoxic tank 1 within 0.1mg/l by an anoxic tank dissolved oxygen instrument;
the effluent of the first anoxic tank 1 automatically flows into a first aerobic tank 2 internally provided with biological fillers, and the dissolved oxygen in the first aerobic tank 2 is controlled to be 4mg/l by an aerobic tank dissolved oxygen instrument;
the effluent of the first aerobic tank 2 automatically flows into a middle slow oxygen release tank 3 with a flow impeller arranged at the bottom;
the effluent of the middle slow oxygen release tank 3 automatically flows into a second anoxic tank 4 which is internally provided with biological filler and a flow driver, and the dissolved oxygen in the second anoxic tank 4 is controlled within 0.3mg/l by an anoxic tank dissolved oxygen instrument;
the effluent of the second anoxic tank 4 automatically flows into a second aerobic tank 5 which is internally provided with biological filler and the bottom of which is provided with a microporous aerator; the dissolved oxygen in the second aerobic tank 5 is controlled to be 3mg/l by an aerobic tank dissolved oxygen meter
The effluent of the second aerobic tank 5 automatically flows into a flocculation reaction tank 6, and a proper amount of PAC (polyaluminium chloride) with the concentration of 8% and PAM (polyacrylamide) with the concentration of 0.2% are added into the flocculation reaction tank 6 according to the change of water quality, so that the dosing flow is adjusted in real time according to the precipitation effect.
The effluent after flocculation in the flocculation reaction tank 6 enters a secondary sedimentation tank 7 for sedimentation;
the effluent of the secondary sedimentation tank 7 automatically flows into a tail water treatment system, and is discharged into a river channel after being treated by the cloth filter and the disinfection water tank.
The treated effluent can realize the effluent quality index COD less than or equal to 25mg/L, BOD less than or equal to 5mg/L, NH3-N less than or equal to 1.0mg/L, TP less than or equal to 0.3mg/L, and can meet the standard requirements of IV water (except total nitrogen) in GB3838-2002 surface water quality environment quality standard. The micro-polluted river water treatment method has good adaptability to the micro-polluted river water, and the treated effluent meets the national discharge standard.
The utility model is explained by combining the practical engineering cases, the concept is reasonable, the operation flow is simple, and the treated micro-polluted water body can reach the IV-class water discharge standard (except total nitrogen) in the environmental quality standard of surface water (GB 3838-2002).
Claims (6)
1. A city micro-polluted river water treatment system is characterized in that: the system comprises a pretreatment system, a first anoxic tank, a first aerobic tank, a middle slow oxygen release tank, a second anoxic tank, a second aerobic tank, a flocculation reaction tank, a secondary sedimentation tank and a tail water treatment system;
the water inlet of the first anoxic tank is connected with pretreated incoming water, the water outlet of the first anoxic tank is communicated with the water inlet of the first aerobic tank, the water outlet of the first aerobic tank is communicated with the water inlet of the middle slow oxygen release tank, the water outlet of the middle slow oxygen release tank is communicated with the water inlet of the second anoxic tank, the water outlet of the second anoxic tank is communicated with the water inlet of the second aerobic tank, the water outlet of the second aerobic tank is communicated with the water inlet of the flocculation reaction tank, the water outlet of the flocculation reaction tank is communicated with the water inlet of the secondary sedimentation tank, and the water outlet of the secondary sedimentation tank is connected with the tail water treatment system and is connected with an externally-discharged river channel through the tail water treatment system;
biological fillers are filled in the first anoxic tank, the second anoxic tank, the first aerobic tank and the second aerobic tank; the first anoxic tank and the second anoxic tank are both provided with an anoxic tank flow impeller and an anoxic tank dissolved oxygen instrument; the first aerobic tank and the second aerobic tank are both provided with a microporous aerator and an aerobic tank dissolved oxygen instrument; the middle slow oxygen release pond is provided with a middle slow oxygen release pond flow impeller; the secondary sedimentation tank is provided with a sludge reflux pump.
2. The municipal micro-polluted river water treatment system of claim 1, wherein: the processing system further comprises a remote control system; the anoxic tank flow impeller, the anoxic tank dissolved oxygen instrument, the microporous aerator, the aerobic tank dissolved oxygen instrument, the intermediate slow-release oxygen tank flow impeller and the sludge reflux pump are all electrically connected with the remote control system;
the microporous aerator is connected with an external Roots blower and provides an air source by the external Roots blower; the external Roots blower is arranged in a device room of the sewage treatment station and is electrically connected with the remote control system.
3. The municipal micro-polluted river water treatment system of claim 2, wherein: the remote control system comprises a programmable logic controller, a field switch, a camera, a control center switch and a local computer;
the input end of the programmable logic controller is connected with a water pump, a pH monitor, a temperature monitor, a liquid level monitor and a pressure monitor which are arranged at the inner side of the sewage treatment station, and the output end of the programmable logic controller is electrically connected with the anoxic pond flow impeller, the anoxic pond dissolved oxygen instrument, the microporous aerator, the aerobic pond dissolved oxygen instrument, the Roots blower, the middle slow release oxygen pond flow impeller and the sludge reflux pump;
the anoxic pond flow impeller, the anoxic pond dissolved oxygen instrument, the microporous aerator, the aerobic pond dissolved oxygen instrument, the Roots blower, the middle slow release oxygen pond flow impeller, the sludge reflux pump and the ultraviolet lamp are all connected and communicated with the on-site exchanger; the camera is arranged in the sewage treatment station and is connected and communicated with the on-site switch, and the anoxic pond flow impeller, the anoxic pond dissolved oxygen instrument, the microporous aerator, the aerobic pond dissolved oxygen instrument, the Roots blower, the intermediate slow release oxygen pond flow impeller, the sludge reflux pump and the camera are all connected and communicated with the control center switch through the on-site switch so as to carry out network data transmission; and the field switch is connected and communicated with the local computer through the control center switch.
4. The municipal micro-polluted river water treatment system of claim 1, wherein: the pretreatment system comprises a trash blocking dam, a water collecting dam and a grid adjusting tank.
5. The municipal micro-polluted river water treatment system of claim 1, wherein: the secondary sedimentation tank is an inclined plate sedimentation tank, namely an inclined plate with an included angle of 60 degrees with the horizontal plane is arranged in the secondary sedimentation tank; the bottom of the secondary sedimentation tank is in a conical hopper shape, and the sludge reflux pump is arranged outside the conical hopper; the inlet of the sludge reflux pump is connected with the bottom of the conical hopper of the secondary sedimentation tank, and the outlet of the sludge reflux pump is connected with the first anoxic tank and the second anoxic tank.
6. The municipal micro-polluted river water treatment system of claim 2, wherein: the tail water treatment system comprises a cloth filter and a disinfection tank; the cloth filter is a vertical fiber cloth filter; an ultraviolet lamp is arranged in the disinfection tank and electrically connected with the remote control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920636413.7U CN210620502U (en) | 2019-05-06 | 2019-05-06 | Urban micro-polluted river water treatment system |
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