CN213446687U - High-speed service area sewage treatment system - Google Patents
High-speed service area sewage treatment system Download PDFInfo
- Publication number
- CN213446687U CN213446687U CN202021456206.2U CN202021456206U CN213446687U CN 213446687 U CN213446687 U CN 213446687U CN 202021456206 U CN202021456206 U CN 202021456206U CN 213446687 U CN213446687 U CN 213446687U
- Authority
- CN
- China
- Prior art keywords
- tank
- water
- sludge
- inlet
- outlet
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a high-speed service area sewage treatment system, which comprises an oil separation tank, a septic tank, a grid tank, an adjusting tank, a coagulation tank, a sedimentation tank, an anoxic tank, a micro-aerobic circulating fluidized biological reaction tank, an MBR membrane tank, a disinfection tank and a clean water tank which are sequentially communicated, wherein the sedimentation tank is also connected with the anoxic tank through an inorganic sludge tank, the micro-aerobic circulating fluidized biological reaction tank and the MBR membrane tank are also connected with an aeration fan, and the clean water tank is also connected with a pressure stabilizing tank; the utility model has the advantages that: the problems of more oil pollutants in the sewage in the high-speed service area, high nitrogen and phosphorus content, low carbon-nitrogen ratio, large fluctuation of water quality and water quantity, high sludge discharge cost and no reclaimed water reuse are solved, the biological sewage treatment efficiency is improved, the sewage treatment effect is ensured, the reclaimed water reuse is realized, and the operation cost of the high-speed service area is saved.
Description
Technical Field
The utility model relates to a sewage treatment plant, specifically speaking are high-speed service area sewage treatment system belongs to the sewage treatment plant field.
Background
The high-speed service area wastewater mainly comprises toilet flushing wastewater, domestic wastewater, kitchen wastewater, car washing wastewater and gas station cleaning wastewater, and pollutants mainly comprise COD, BOD, SS, nitrogen, phosphorus and oil pollutants. The method mainly has the following characteristics: 1, the biological degradation-resistant oil contains more pollutants such as surfactant, grease, fatty protein and the like which are difficult to biodegrade; 2, the toilet flushing wastewater has large proportion, high ammonia nitrogen and total nitrogen content, so that the carbon-nitrogen ratio in the sewage is too low and the biological treatment is difficult; 3, high total phosphorus content; 4, the water quality and the water quantity fluctuation are large, and the water quality and the water quantity of the wastewater in the high-speed service area are simultaneously influenced by the change of seasons, day and night periods and holidays, so that the impact load on the biological sewage treatment system is large; 5, the sewage quantity is mostly 30-200 m/d, the scale is small, so the sludge discharge frequency is not reduced although the sludge discharge quantity is small, the residual sludge in most service areas is directly transported out without concentration, the sludge discharge cost is high, and the operation cost of water treatment per ton is high; 6 at present, most sewage treatment systems in high-speed service areas are not provided with reclaimed water reuse systems due to the technical reasons that the water quality does not reach the reclaimed water reuse standard and the like, and tap water is adopted for flushing toilets and greening.
At present, the typical treatment process aiming at the high-speed service area is 'septic tank → grating → adjusting tank → anaerobic process → contact oxidation → filtration' system treatment process with the end adopting MBR membrane filtration, which can only reduce pollutants such as COD, partial TN, partial TP and the like in the sewage. A large amount of carbon sources must be added for removing the residual TN, and the residual surfactant and grease can cause oxygen deficiency and odor of the water body after being discharged into the natural water body.
Therefore, in order to solve the existing problems of the specificity and treatment process of the high-speed service area sewage, a high-speed service area sewage treatment system needs to be designed to meet the requirements of high-speed service area sewage treatment and reclaimed water recycling.
Disclosure of Invention
An object of the utility model is to design a high-speed service area sewage treatment system, but have functions such as deoiling, get rid of high nitrogen phosphorus, impact load resistant, reduce the mud discharge number of times, reuse of reclaimed water.
The technical scheme of the utility model is that:
the utility model provides a high-speed service area sewage treatment system, is including the oil interceptor, septic tank, grid pond, equalizing basin, thoughtlessly congeal pond, sedimentation tank, oxygen deficiency pond, little good oxygen circulation fluidization biological reaction pond, MBR membrane cisterna, disinfection pond, clean water basin that are linked together in proper order, the sedimentation tank still through inorganic sludge impoundment with the oxygen deficiency pond links to each other, little good oxygen circulation fluidization biological reaction pond, MBR membrane cisterna still link to each other with aeration fan, the clean water basin still links to each other with the surge tank.
Further, the oil separation tank is provided with a kitchen sewage inlet, an oil stain outlet and an oil-separated sewage outlet, wherein the kitchen sewage inlet is connected with the kitchen sewage raw water main collecting pipeline, the oil stain outlet is connected with the oil pumping pipeline during periodic oil discharge, and the oil-separated sewage outlet is connected with the oil-separated sewage inlet of the septic tank;
the septic tank is provided with a public toilet and domestic sewage inlet, an oil-separated sewage inlet, a residual sludge inlet, an organic sludge outlet and a treated water outlet, wherein the organic sludge outlet is connected with a sludge pumping pipeline during periodic sludge discharge, and the treated water outlet is connected with a water inlet of the grating tank;
the grating tank is provided with a grating tank water inlet and a grating tank water outlet, wherein the grating tank water outlet is connected with the regulating tank water inlet;
the adjusting tank is provided with an adjusting tank water inlet and an adjusting tank water outlet, wherein the adjusting tank water outlet is connected with the coagulating tank water inlet;
the coagulation tank is provided with a coagulation tank water inlet, a coagulation tank water outlet and a dosing inlet, wherein the coagulation tank water outlet is connected with the sedimentation tank water inlet, and the dosing inlet is connected with a flocculating agent and coagulant aid dosing pipeline;
the sedimentation tank is provided with a water inlet, a water outlet and a sludge discharge outlet, wherein the water outlet is connected with the water inlet of the anoxic tank 7, and the sludge discharge outlet is connected with the water inlet of the inorganic sludge tank through a sludge suction pump;
the anoxic tank is provided with an anoxic tank water inlet, an inorganic sludge supernatant inlet, a return sludge inlet and an anoxic tank water outlet, wherein the inorganic sludge supernatant inlet is connected with the inorganic sludge tank supernatant water outlet, and the anoxic tank water outlet is connected with the micro-aerobic circulating fluidized biological reaction tank water inlet;
the micro-aerobic circulating fluidized biological reaction tank is provided with a biological reaction tank water inlet, a biological reaction tank water outlet and an air inlet, wherein the biological reaction tank water outlet is connected with the MBR membrane tank water inlet;
the MBR membrane tank is provided with an MBR membrane tank water inlet, a backwashing water inlet, an MBR membrane tank water outlet, a return sludge outlet and an air inlet, wherein the MBR membrane tank water outlet is connected with the disinfection tank, and the return sludge outlet is connected with a return sludge inlet of the anoxic tank and a residual sludge inlet of the septic tank through a sludge return pump;
the disinfection tank is provided with a disinfection tank water inlet, a disinfection tank water outlet and a disinfection tank dosing inlet, wherein the disinfection tank water outlet is connected with the clean water tank water inlet, and the disinfection tank dosing inlet is connected with the disinfectant dosing pipeline;
the clean water tank is provided with a clean water tank water inlet, a clean water tank water outlet and a backwashing water outlet, wherein the water outlet is respectively connected with the pressure stabilizing tank water inlet, the greening spraying pipeline and the treatment station main discharge pipeline through a lift pump;
the inorganic sludge tank is provided with a sludge tank water inlet, a supernatant liquid water outlet and an inorganic sludge outlet, wherein the supernatant liquid water outlet is connected with the inorganic sludge supernatant liquid inlet of the anoxic tank, and the inorganic sludge outlet is connected with a sludge pumping pipeline during periodic sludge discharge;
the aeration fan is provided with an air outlet which is respectively connected with an air inlet of the micro-aerobic circulating fluidized biological reaction tank and an air inlet of the MBR membrane tank;
the pressure stabilizing tank is provided with a pressure stabilizing tank water inlet, a pressure stabilizing tank water outlet and a pressure gauge, and the pressure stabilizing tank water outlet is connected with a flushing recycling pipeline of reclaimed water in a service area.
The sludge discharge period of the septic tank is 90-150 days.
1-2 grids are arranged in the front and the back of the grid pool, the gaps of the grids are 3-5mm, and if the gaps of the grids are 2 grids, the gaps are decreased progressively; the grating adopts an artificial grating or a mechanical rotary grating; if an artificial grating is adopted, the clearing period is 90-180 days.
The coagulation tank is used for removing phosphorus and suspended matters chemically, a mechanical stirring mode is adopted for mixing and flocculating, a motor is arranged at the top of the coagulation tank, and the lower end output end of the motor is connected with a stirring rod.
The stirrer is arranged in the anoxic tank and is used for completely mixing sewage in the tank, so that the impact load resistance of the biochemical treatment unit is greatly improved, and the problem of unbalanced microorganism nutrition caused by large water quality and water quantity fluctuation is reduced; the dissolved oxygen in the anoxic tank is 0-0.5mg/L, and the hydraulic retention time is 4-8 h.
An aeration device, an inner cylinder and an outer cylinder plug flow device are arranged in the microaerobic circulating fluidized biological reaction tank, wherein the inner cylinder is erected at the center of the microaerobic circulating fluidized biological reaction tank and is used for realizing zoning and fluidization in the reaction tank; the aeration device is fixed at the bottom of the inner barrel and is used for supplying oxygen to microorganisms; the outer cylinder plug flow device is erected on the outer ring of the inner cylinder and is used for assisting in pushing the circulating fluidization of the activated sludge; through the structure, the air provided by the aeration device is used as power, and the activated sludge in the reaction tank is quickly circulated and fluidized between the inner side and the outer side of the inner cylinder, so that the symbiosis of anoxic, facultative and aerobic microorganisms is realized, and the removal efficiency of pollutants is improved; the aeration device is connected with an air inlet of the microaerobic circulating fluidized biological reaction tank; the dissolved oxygen in the aerobic zone is 1.0-3.0mg/L, and the dissolved oxygen in the facultative zone is 0-0.5 mg/L; the hydraulic retention time is 4-8 h.
An MBR membrane module is arranged in the MBR membrane tank and is used for separating sewage from sludge; the membrane component adopts a hollow fiber curtain type microfiltration membrane, the membrane silk material is PVDF, and the membrane aperture is 0.1-0.4 μm; the dissolved oxygen in the MBR membrane tank is 2.0-4.0 mg/L; and a sludge return pump is arranged in the MBR membrane tank, returns sludge to the anoxic tank, and discharges residual sludge to the septic tank at regular intervals.
The disinfection mode adopted by the disinfection tank is dosing disinfection, the dosing agent adopts sodium hypochlorite or chlorine dioxide, and the hydraulic retention time is longer than 30 min.
A backwashing water pump, a reclaimed water supply variable frequency pump set, a greening water pump and an external drainage pump are arranged in the clean water tank and are respectively connected to an MBR membrane backwashing pipeline, a pressure stabilizing tank, a greening spraying pipeline and a treatment station main discharge pipeline through single water outlets; if the outdoor temperature of the construction site of the sewage treatment system is lower than 0 ℃, stopping using the greening water pump and emptying water in the greening spraying pipeline to prevent freezing; the service area can cancel the corresponding water pump according to the requirement of the actual reclaimed water recycling.
The sludge discharge period of the inorganic sludge tank is 40-60 days.
The aeration fan is a rotary fan or a Roots fan.
The processing system also comprises an automatic control system, and the automatic control system consists of a PLC control cabinet, a signal transmission line and a sensor; wherein, the sensor comprises a liquid level meter, a pressure gauge and a flow meter, and is respectively arranged in the regulating tank, the coagulation tank, the sedimentation tank, the anoxic tank, the micro-aerobic circulating fluidized biological reaction tank, the MBR membrane tank, the clean water tank, the aeration fan and the pressure stabilizing tank according to the purpose; the sensors receive signals and transmit the signals to the PLC automatic control cabinet, and then the PLC automatic control cabinet feeds back control signals to the water pumps, the fans, the stirrer and the electromagnetic valve according to the process requirements to control the starting and stopping of each device, so as to realize liquid level regulation, dosing control, water inlet and outlet control, MBR membrane water production frequency control, MBR membrane backwashing control, pressure change and control of a reclaimed water recycling pipeline and fault alarm of each processing unit; through the equalizing basin elevator pump, the start of product water pump is stopped and is made the oxygen deficiency pond, the liquid level in little aerobic cycle fluidization biological reaction pond keeps unchangeable basically, it is more even to make the oxygen deficiency pond inflow through the change of MBR membrane water yield and product water frequency, the water yield fluctuation has been reduced, control the matching of dosing amount and inflow through the start and stop of inflow control dosing pump, the backwash frequency is controlled to the pressure through MBR membrane outlet pipe, adjust the operating frequency of fan so that control dissolved oxygen according to the inflow, guarantee microorganism living environment, it is unchangeable to keep steady voltage tank pressure through the normal water supply frequency conversion pump package of control clear water pond, guarantee normal water retrieval and utilization pipeline pressure, carry out malfunction alerting when each equipment breaks down, the suggestion maintenance.
In order to separate oil-containing pollutants such as surfactants, grease and fatty protein in sewage, an oil separation tank is arranged to ensure the removal of the oil pollutants;
in order to ensure the removal of total phosphorus, a coagulation tank and a sedimentation tank are arranged at the front end of biological treatment, part of total phosphorus and part of SS in sewage are removed through physical flocculation, the generated floc precipitate is subjected to solid-liquid separation in the sedimentation tank, the supernatant enters an anoxic tank, and the precipitate is periodically discharged to an inorganic sludge tank;
in order to treat total nitrogen and ammonia nitrogen in sewage with low carbon-nitrogen ratio, the biological treatment adopts a process of an anoxic tank and a microaerobic circulating fluidized biological reaction tank, wherein the anoxic tank has the main function of removing nitrogen and phosphorus, and the microaerobic circulating fluidized biological reaction tank has the main function of removing COD (chemical oxygen demand), BOD (biochemical oxygen demand) and ammonia nitrogen;
a submersible mechanical stirrer is arranged in the anoxic tank, so that complete mixing is realized in the anoxic tank, and the water inlet flow, MBR (membrane bioreactor) water production flow and frequency, sludge reflux and aeration rate of an aeration fan are regulated by an automatic control system, so that the influence of fluctuation of water quality and water quantity on biological reaction is reduced;
in order to ensure the effluent quality and save the occupied area, an MBR membrane tank is arranged at the rear end of the micro-aerobic circulating fluidized biological reaction tank, solid-liquid separation is carried out on sludge and sewage, the sludge is intercepted in the MBR membrane tank, and the treated sewage is directly drawn out from membrane filaments;
a sludge reflux pump is arranged in the MBR membrane tank and is respectively connected with the anoxic tank and the septic tank, on one hand, sludge in the MBR membrane tank is refluxed to the anoxic tank, on the other hand, residual sludge is periodically conveyed to the septic tank, supernatant liquid enters the grid tank along with raw water after the treatment of the septic tank, and the precipitated sludge with high solid content is transported out when the septic tank is periodically cleaned, so that the frequency and the cost for directly transporting the residual sludge out are greatly reduced;
in order to realize the reuse of reclaimed water, besides the high-efficiency filtration of sewage and sludge by the MBR membrane tank, a disinfection tank is also arranged at the tail end, and a disinfectant adopts sodium hypochlorite or chlorine dioxide; the sewage is disinfected to reach the reclaimed water reuse standard and stored in a clean water tank, reclaimed water in the clean water tank is supplied to a toilet flushing pipeline of a service area through a reclaimed water supply pump and a pressure stabilizing tank on one hand, and on the other hand, redundant clean water is supplied to a greening spraying pipeline through a greening water pump, if the outdoor temperature of the construction ground of the sewage treatment system is lower than 0 ℃, the greening water pump is stopped and water in the greening spraying pipeline is emptied to prevent freezing, and the residual reclaimed water in the clean water tank is directly discharged outside.
The utility model has the advantages that: the problems of more oil pollutants in the sewage in the high-speed service area, high nitrogen and phosphorus content, low carbon-nitrogen ratio, large fluctuation of water quality and water quantity, high sludge discharge cost and no reclaimed water reuse are solved, the biological sewage treatment efficiency is improved, the sewage treatment effect is ensured, the reclaimed water reuse is realized, and the operation cost of the high-speed service area is saved.
The present invention will be further explained with reference to the drawings and examples.
Drawings
FIG. 1 is a schematic structural view of a high-speed service area sewage treatment system according to an embodiment of the present invention;
in the figure: 1. an oil separation tank; 2. a septic tank; 3. a grid tank; 4. a regulating tank; 5. a coagulation tank; 6. a sedimentation tank; 7. an anoxic tank; 8. a microaerobic circulating fluidized biological reaction tank; 9. an MBR membrane tank; 10. a disinfection tank 11 and a clean water tank; 12. an inorganic sludge tank; 13. an aeration fan; 14. and (7) a pressure stabilizing tank.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is not intended to limit the invention.
Example 1
As shown in fig. 1, a high-speed service area sewage treatment system comprises an oil separation tank 1, a septic tank 2, a grating tank 3, an adjusting tank 4, a coagulation tank 5, a sedimentation tank 6, an anoxic tank 7, a microaerobic circulating fluidized biological reaction tank 8, an MBR membrane tank 9, a disinfection tank 10 and a clean water tank 11 which are sequentially communicated, wherein the sedimentation tank 6 is further connected with the anoxic tank 7 through an inorganic sludge tank 12, the microaerobic circulating fluidized biological reaction tank 8 and the MBR membrane tank 9 are further connected with an aeration fan 13, and the clean water tank 11 is further connected with a pressure stabilizing tank 14; the treatment system also comprises an automatic control system which is used for realizing liquid level regulation, dosing control, water inlet and outlet control, MBR membrane water production frequency control, MBR membrane backwashing control, pressure change and control of a reclaimed water recycling pipeline and fault alarm of each treatment unit.
The oil separation tank 1 is provided with a kitchen sewage inlet, an oil stain outlet and an oil-separated sewage outlet, wherein the kitchen sewage inlet is connected with the kitchen sewage raw water main collecting pipeline, the oil stain outlet is connected with an oil pumping pipeline during periodic oil discharge, and the oil-separated sewage outlet is connected with the oil-separated sewage inlet of the septic tank 2;
the septic tank 2 is provided with a public toilet and domestic sewage inlet, an oil-separated sewage inlet, a residual sludge inlet, an organic sludge outlet and a treated water outlet, wherein the organic sludge outlet is connected with a sludge pumping pipeline during periodic sludge discharge, and the treated water outlet is connected with a water inlet of the grating tank;
the grating tank 3 is provided with a grating tank water inlet and a grating tank water outlet, wherein the grating tank water outlet is connected with the regulating tank 4 water inlet;
the adjusting tank 4 is provided with an adjusting tank water inlet and an adjusting tank water outlet, wherein the adjusting tank water outlet is connected with the water inlet of the coagulation tank 5;
the coagulation tank 5 is provided with a coagulation tank water inlet, a coagulation tank water outlet and a dosing inlet, wherein the coagulation tank water outlet is connected with the sedimentation tank 6 water inlet, and the dosing inlet is connected with a flocculating agent and coagulant aid dosing pipeline;
the sedimentation tank 6 is provided with a water inlet, a water outlet and a sludge discharge outlet, wherein the water outlet is connected with the water inlet of the anoxic tank 7, and the sludge discharge outlet is connected with the water inlet of the inorganic sludge tank 12 through a sludge suction pump;
the anoxic tank 7 is provided with an anoxic tank water inlet, an inorganic sludge supernatant inlet, a return sludge inlet and an anoxic tank water outlet, wherein the inorganic sludge supernatant inlet is connected with the inorganic sludge tank 12 supernatant water outlet, and the anoxic tank water outlet is connected with the micro-aerobic circulating fluidized biological reaction tank 8 water inlet;
the microaerobic circulating fluidized biological reaction tank 8 is provided with a biological reaction tank water inlet, a biological reaction tank water outlet and an air inlet, wherein the biological reaction tank water outlet is connected with the MBR membrane tank 9 water inlet;
the MBR membrane tank 9 is provided with an MBR membrane tank water inlet, a backwashing water inlet, an MBR membrane tank water outlet, a return sludge outlet and an air inlet, wherein the MBR membrane tank water outlet is connected with the disinfection tank 10, and the return sludge outlet is connected with the return sludge inlet of the anoxic tank 7 and the residual sludge inlet of the septic tank 2 through a sludge return pump;
the disinfection tank 10 is provided with a disinfection tank water inlet, a disinfection tank water outlet and a disinfection tank dosing inlet, wherein the disinfection tank water outlet is connected with the water inlet of the clean water tank 11, and the disinfection tank dosing inlet is connected with the disinfectant dosing pipeline;
the clean water tank 11 is provided with a clean water tank water inlet, a clean water tank water outlet and a backwashing water outlet, wherein the water outlet is respectively connected with a pressure stabilizing tank 14 water inlet, a greening spraying pipeline and a treatment station main discharge pipeline through a lift pump;
the inorganic sludge tank 12 is provided with a sludge tank water inlet, a supernatant liquid water outlet and an inorganic sludge outlet, wherein the supernatant liquid water outlet is connected with the inorganic sludge supernatant liquid inlet of the anoxic tank 7, and the inorganic sludge outlet is connected with a sludge pumping pipeline during periodic sludge discharge;
the aeration fan 13 is provided with an air outlet, and the air outlet is respectively connected with an air inlet of the microaerobic circulating fluidized biological reaction tank 8 and an air inlet of the MBR membrane tank 9;
the pressure stabilizing tank 14 is provided with a pressure stabilizing tank water inlet, a pressure stabilizing tank water outlet and a pressure gauge, wherein the pressure stabilizing tank water outlet is connected with a service area reclaimed water toilet flushing recycling pipeline.
The sludge discharge period of the septic tank 2 is 90-150 days.
1-2 grids are arranged in the front and the back of the grid pool 3, the gap between the grids is 3-5mm, and if the gaps are 2 grids, the gap is decreased progressively; the grating adopts an artificial grating or a mechanical rotary grating; if an artificial grating is adopted, the clearing period is 90-180 days.
The coagulation tank 5 is used for removing phosphorus and suspended matters chemically, a mechanical stirring mode is adopted for mixing and flocculating, a motor is arranged at the top of the coagulation tank 5, and the lower end output end of the motor is connected with a stirring rod.
The grid tank 3 and the adjusting tank 4 can be jointly built, and the coagulation tank 5 and the sedimentation tank 6 can be jointly built.
The anoxic tank 7 is internally provided with a stirrer which is used for completely mixing sewage in the tank, so that the impact load resistance of the biochemical treatment unit is greatly improved, and the problem of unbalanced microorganism nutrition caused by large water quality and water quantity fluctuation is reduced; the dissolved oxygen in the anoxic pond 7 is 0-0.5mg/L, and the hydraulic retention time is 4-8 h.
An aeration device, an inner cylinder and an outer cylinder plug flow device are arranged in the microaerobic circulating fluidized biological reaction tank 8, wherein the inner cylinder is erected at the center of the microaerobic circulating fluidized biological reaction tank 8 and is used for realizing zoning and fluidization in the reaction tank; the aeration device is fixed at the bottom of the inner cylinder and is used for supplying oxygen to the microorganisms; the outer cylinder plug flow device is erected on the outer ring of the inner cylinder and is used for assisting in pushing the circulating fluidization of the activated sludge; through the structure, the air provided by the aeration device is used as power, and the activated sludge in the reaction tank is quickly circulated and fluidized between the inner side and the outer side of the inner cylinder, so that the symbiosis of anoxic, facultative and aerobic microorganisms is realized, and the removal efficiency of pollutants is improved; the aeration device is connected with an air inlet of the microaerobic circulating fluidized biological reaction tank 8; the dissolved oxygen in the aerobic zone is 1.0-3.0mg/L, and the dissolved oxygen in the facultative zone is 0-0.5 mg/L; the hydraulic retention time is 4-8 h.
An MBR membrane module is arranged in the MBR membrane tank 9 and is used for separating sewage from sludge; the membrane component adopts a hollow fiber curtain type microfiltration membrane, the membrane silk material is PVDF, and the membrane aperture is 0.1-0.4 μm; the dissolved oxygen in the MBR membrane tank 9 is 2.0-4.0 mg/L; a sludge return pump is arranged in the MBR membrane tank 9, sludge is returned to the anoxic tank, and residual sludge is discharged to the septic tank at regular intervals.
The disinfection mode adopted by the disinfection tank 10 is dosing disinfection, the dosing agent adopts sodium hypochlorite or chlorine dioxide, and the hydraulic retention time is longer than 30 min.
A backwashing water pump, a reclaimed water supply variable frequency pump set, a greening water pump and an external drainage pump are arranged in the clean water tank 11 and are respectively connected to an MBR membrane backwashing pipeline, a pressure stabilizing tank, a greening spraying pipeline and a treatment station main discharge pipeline through single water outlets; if the outdoor temperature of the construction site of the sewage treatment system is lower than 0 ℃, stopping using the greening water pump and emptying water in the greening spraying pipeline to prevent freezing; the service area can cancel the corresponding water pump according to the requirement of the actual reclaimed water recycling.
The sludge discharge period of the inorganic sludge tank 12 is 40-60 days.
The aeration fan 13 is a rotary fan or a Roots fan.
The automatic control system consists of a PLC control cabinet, a signal transmission line and a sensor; wherein, the sensor comprises a liquid level meter, a pressure gauge and a flow meter, and is respectively arranged in the regulating tank, the coagulation tank, the sedimentation tank, the anoxic tank, the micro-aerobic circulating fluidized biological reaction tank, the MBR membrane tank, the clean water tank, the aeration fan and the pressure stabilizing tank according to the purpose; the sensors receive signals and transmit the signals to the PLC automatic control cabinet, and then the PLC automatic control cabinet feeds back control signals to the water pumps, the fans, the stirrer and the electromagnetic valve according to the process requirements to control the starting and stopping of each device, so as to realize liquid level regulation, dosing control, water inlet and outlet control, MBR membrane water production frequency control, MBR membrane backwashing control, pressure change and control of a reclaimed water recycling pipeline and fault alarm of each processing unit; through the equalizing basin elevator pump, the start of product water pump is stopped and is made the oxygen deficiency pond, the liquid level in little aerobic cycle fluidization biological reaction pond keeps unchangeable basically, it is more even to make the oxygen deficiency pond inflow through the change of MBR membrane water yield and product water frequency, the water yield fluctuation has been reduced, control the matching of dosing amount and inflow through the start and stop of inflow control dosing pump, the backwash frequency is controlled to the pressure through MBR membrane outlet pipe, adjust the operating frequency of fan so that control dissolved oxygen according to the inflow, guarantee microorganism living environment, it is unchangeable to keep steady voltage tank pressure through the normal water supply frequency conversion pump package of control clear water pond, guarantee normal water retrieval and utilization pipeline pressure, carry out malfunction alerting when each equipment breaks down, the suggestion maintenance.
In order to separate oil-containing pollutants such as surfactants, grease and fatty protein in sewage, an oil separation tank 1 is arranged to ensure the removal of the oil-containing pollutants;
in order to ensure the removal of total phosphorus, a coagulation tank 5 and a sedimentation tank 6 are arranged at the front end of biological treatment, part of total phosphorus and part of SS in sewage are removed through physical flocculation, the generated floc sediment is subjected to solid-liquid separation in the sedimentation tank 6, the supernatant enters an anoxic tank 7, and the sediment is periodically discharged to an inorganic sludge tank 12;
in order to treat the total nitrogen and ammonia nitrogen in the sewage with low carbon-nitrogen ratio, the biological treatment adopts a process of an anoxic tank and a microaerobic circulating fluidized biological reaction tank, wherein the anoxic tank 7 has the main function of removing nitrogen and phosphorus, and the microaerobic circulating fluidized biological reaction tank 8 has the main function of removing COD, BOD and ammonia nitrogen;
a submersible mechanical stirrer is arranged in the anoxic tank 7, so that complete mixing is realized in the anoxic tank, and the water inlet flow, MBR (membrane bioreactor) water production flow and frequency, sludge reflux and aeration rate of an aeration fan are adjusted by an automatic control system, so that the influence of the fluctuation of water quality and water quantity on biological reaction is reduced;
in order to ensure the effluent quality and save the occupied area, an MBR membrane tank 9 is arranged at the rear end of a microaerobic circulating fluidized biological reaction tank 8, solid-liquid separation is carried out on sludge and sewage, the sludge is intercepted in the MBR membrane tank, and the treated sewage is directly drawn out from membrane filaments;
in the treatment system, a sludge reflux pump is arranged in an MBR membrane tank 9, on one hand, sludge in the MBR membrane tank is refluxed to the anoxic tank 7, on the other hand, residual sludge is periodically conveyed to the septic tank 2, supernatant after treatment of the septic tank enters the grid tank 3 along with raw water, and precipitated high-solid-content sludge is transported outwards when the septic tank 2 is periodically cleaned, so that the frequency and cost for directly transporting the residual sludge outwards are greatly reduced;
in order to realize the reuse of reclaimed water, besides the high-efficiency filtration of sewage and sludge by the MBR membrane tank 9, a disinfection tank 10 is also arranged at the tail end, and a disinfectant adopts sodium hypochlorite or chlorine dioxide; the sewage after being disinfected reaches the reclaimed water reuse standard and is stored in a clean water tank, reclaimed water in the clean water tank is supplied to a toilet flushing pipeline of a service area through a reclaimed water supply pump and a pressure stabilizing tank on one hand, and on the other hand, redundant clean water is supplied to a greening spraying pipeline through a greening water pump, if the outdoor temperature of the construction ground of the sewage treatment system is lower than 0 ℃, the greening water pump is stopped and water in the greening spraying pipeline is emptied to prevent freezing, and the residual reclaimed water in the clean water tank 11 is directly discharged.
In the embodiment, raw sewage in the high-speed service area is divided into two main pipes to enter the sewage treatment system, and toilet flushing and domestic sewage are arranged in one pipeline and are directly connected to the septic tank 2; the other pipeline is internally provided with kitchen sewage, car washing and cleaning wastewater, the oil and water of the kitchen sewage, the car washing and the cleaning wastewater are separated by an oil separation tank 1, the wastewater enters a septic tank 2, and oil stains are periodically pumped out and transported.
After the sewage enters the septic tank 2, the cured substances such as excrement, sludge and the like are fermented, digested and decomposed in the anaerobic environment in the tank, and a large amount of excrement, pathogenic bacteria and suspended substances in the sewage are removed; the precipitated sludge at the bottom of the pool is converted into the stable mature sludge with high solid content, and the mature sludge is periodically cleaned, taken out and transported for landfill or used as fertilizer.
After the sewage enters the grating tank 3, larger suspended solid and floating objects are intercepted under the filtering action of the grating; then the sewage flows through a regulating tank 4 to enter a coagulation tank 5 and a sedimentation tank 6, and a part of total phosphorus and a part of SS are removed by utilizing the physical action of flocculation and sedimentation, wherein the sludge at the bottom of the sedimentation tank 6 is discharged into an inorganic sludge tank 12, and the supernatant of the inorganic sludge tank 12 is discharged into an anoxic tank 7; the sewage after coagulating sedimentation sequentially enters an anoxic tank 7 and a micro-aerobic circulating fluidized biological reaction tank 8, and pollutants such as COD, BOD, TN, ammonia nitrogen, TP and the like are biodegraded under the action of a large amount of microorganisms in the tanks; the sewage after biological treatment enters an MBR membrane tank 9, under the filtering action of a microfiltration membrane, mud and water are completely separated, sludge is retained in the MBR membrane tank 9 and flows back to an anoxic tank 7, and residual sludge is periodically discharged to a septic tank 2 for fermentation and decomposition; the effluent of the MBR membrane tank 9 reaches the discharge standard, and in order to realize the reuse of the reclaimed water, the membrane effluent enters a disinfection tank 10 for disinfection treatment to reach the reuse standard of the reclaimed water; the reclaimed water is stored in a clean water tank 11, and the reclaimed water in the clean water tank 11 has 3 directions: supplying MBR membrane for backwashing, supplying flushing for recycling through a pressure stabilizing tank 14, and greening for recycling, wherein the residual reclaimed water is discharged to a natural water body; the aeration fan 13 simultaneously supplies air to the micro-aerobic circulating fluidized biological reaction tank 8 and the MBR membrane tank 9, and is respectively used for ensuring the living environment of aerobic microorganisms and shaking membrane filaments to prevent sludge adhesion.
In the embodiment, because the fluctuation of the water quality and the water quantity of the high-speed service area is large, the sewage is firstly regulated by the regulating tank 4 for the first time and then regulated for the second time after entering the anoxic tank 7, so that the impact load in the anoxic tank 7 and the micro-aerobic circulating fluidized biological reaction tank 8 is reduced, the living environment of the microorganism becomes relatively stable, and the biological treatment effect is improved.
Claims (10)
1. The utility model provides a high-speed service area sewage treatment system which characterized in that: including oil interceptor, septic tank, grid pond, equalizing basin, the pond of coagulating, sedimentation tank, oxygen deficiency pond, little good oxygen circulation fluidization biological reaction pond, MBR membrane cisterna, disinfection pond, clean water basin that are linked together in proper order, the sedimentation tank still through inorganic sludge impoundment with the oxygen deficiency pond links to each other, little good oxygen circulation fluidization biological reaction pond, MBR membrane cisterna still link to each other with aeration fan, the clean water basin still links to each other with the surge tank.
2. The high velocity service area wastewater treatment system of claim 1, wherein: the treatment system also comprises an automatic control system which is used for realizing liquid level regulation, dosing control, water inlet and outlet control, MBR membrane water production frequency control, MBR membrane backwashing control, pressure change and control of a reclaimed water recycling pipeline and fault alarm of each treatment unit.
3. The high velocity service area wastewater treatment system of claim 1, wherein: and a submersible mechanical stirrer is arranged in the anoxic tank.
4. The high velocity service area wastewater treatment system of claim 1, wherein: and a sludge reflux pump is arranged in the MBR membrane tank and is respectively connected with the anoxic tank and the septic tank.
5. The high velocity service area wastewater treatment system of claim 1, wherein: the oil separation tank is provided with a kitchen sewage inlet, an oil stain outlet and an oil-separated sewage outlet, wherein the kitchen sewage inlet is connected with the kitchen sewage raw water main collecting pipeline, the oil stain outlet is connected with the oil pumping pipeline during periodic oil discharge, and the oil-separated sewage outlet is connected with the oil-separated sewage inlet of the septic tank;
the septic tank is provided with a public toilet and domestic sewage inlet, an oil-separated sewage inlet, a residual sludge inlet, an organic sludge outlet and a treated water outlet, wherein the organic sludge outlet is connected with a sludge pumping pipeline during periodic sludge discharge, and the treated water outlet is connected with a water inlet of the grating tank;
the grating tank is provided with a grating tank water inlet and a grating tank water outlet, wherein the grating tank water outlet is connected with the regulating tank water inlet;
the adjusting tank is provided with an adjusting tank water inlet and an adjusting tank water outlet, wherein the adjusting tank water outlet is connected with the coagulating tank water inlet;
the coagulation tank is provided with a coagulation tank water inlet, a coagulation tank water outlet and a dosing inlet, wherein the coagulation tank water outlet is connected with the sedimentation tank water inlet, and the dosing inlet is connected with a flocculating agent and coagulant aid dosing pipeline;
the sedimentation tank is provided with a water inlet, a water outlet and a sludge discharge outlet, wherein the water outlet is connected with the water inlet of the anoxic tank, and the sludge discharge outlet is connected with the water inlet of the inorganic sludge tank through a sludge suction pump;
the anoxic tank is provided with an anoxic tank water inlet, an inorganic sludge supernatant inlet, a return sludge inlet and an anoxic tank water outlet, wherein the inorganic sludge supernatant inlet is connected with the inorganic sludge tank supernatant water outlet, and the anoxic tank water outlet is connected with the micro-aerobic circulating fluidized biological reaction tank water inlet;
the micro-aerobic circulating fluidized biological reaction tank is provided with a biological reaction tank water inlet, a biological reaction tank water outlet and an air inlet, wherein the biological reaction tank water outlet is connected with the MBR membrane tank water inlet;
the MBR membrane tank is provided with an MBR membrane tank water inlet, a backwashing water inlet, an MBR membrane tank water outlet, a return sludge outlet and an air inlet, wherein the MBR membrane tank water outlet is connected with the disinfection tank, and the return sludge outlet is connected with a return sludge inlet of the anoxic tank and a residual sludge inlet of the septic tank through a sludge return pump;
the disinfection tank is provided with a disinfection tank water inlet, a disinfection tank water outlet and a disinfection tank dosing inlet, wherein the disinfection tank water outlet is connected with the clean water tank water inlet, and the disinfection tank dosing inlet is connected with the disinfectant dosing pipeline;
the clean water tank is provided with a clean water tank water inlet, a clean water tank water outlet and a backwashing water outlet, wherein the water outlet is respectively connected with the pressure stabilizing tank water inlet, the greening spraying pipeline and the treatment station main discharge pipeline through a lift pump;
the inorganic sludge tank is provided with a sludge tank water inlet, a supernatant liquid water outlet and an inorganic sludge outlet, wherein the supernatant liquid water outlet is connected with the inorganic sludge supernatant liquid inlet of the anoxic tank, and the inorganic sludge outlet is connected with a sludge pumping pipeline during periodic sludge discharge;
the aeration fan is provided with an air outlet which is respectively connected with an air inlet of the micro-aerobic circulating fluidized biological reaction tank and an air inlet of the MBR membrane tank;
the pressure stabilizing tank is provided with a pressure stabilizing tank water inlet, a pressure stabilizing tank water outlet and a pressure gauge, and the pressure stabilizing tank water outlet is connected with a flushing recycling pipeline of reclaimed water in a service area.
6. The high velocity service area wastewater treatment system of claim 1, wherein: 1-2 grids are arranged in the front and the back of the grid pool, the gaps of the grids are 3-5mm, and if the gaps of the grids are 2 grids, the gaps are decreased progressively; the grating adopts an artificial grating or a mechanical rotary grating.
7. The high velocity service area wastewater treatment system of claim 1, wherein: and a stirrer is arranged in the anoxic tank.
8. The high velocity service area wastewater treatment system of claim 1, wherein: an aeration device, an inner cylinder and an outer cylinder plug flow device are arranged in the microaerobic circulating fluidized biological reaction tank, and the aeration device is connected with an air inlet of the microaerobic circulating fluidized biological reaction tank; the dissolved oxygen in the aerobic zone is 1.0-3.0mg/L, and the dissolved oxygen in the facultative zone is 0-0.5 mg/L; the hydraulic retention time is 4-8 h.
9. The high velocity service area wastewater treatment system of claim 1, wherein: an MBR membrane module is arranged in the MBR membrane tank, the membrane module adopts a hollow fiber curtain type microfiltration membrane, the membrane yarn is made of PVDF, and the membrane aperture is 0.1-0.4 μm; the dissolved oxygen in the MBR membrane tank is 2.0-4.0 mg/L; and a sludge return pump is arranged in the MBR membrane tank, returns sludge to the anoxic tank, and discharges residual sludge to the septic tank at regular intervals.
10. The high velocity service area wastewater treatment system of claim 1, wherein: and a backwashing water pump, a reclaimed water supply variable frequency pump set, a greening water pump and an external drainage pump are arranged in the clean water tank and are respectively connected to an MBR membrane backwashing pipeline, a pressure stabilizing tank, a greening spraying pipeline and a treatment station main discharge pipeline through independent water outlets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021456206.2U CN213446687U (en) | 2020-07-22 | 2020-07-22 | High-speed service area sewage treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021456206.2U CN213446687U (en) | 2020-07-22 | 2020-07-22 | High-speed service area sewage treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213446687U true CN213446687U (en) | 2021-06-15 |
Family
ID=76307716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021456206.2U Expired - Fee Related CN213446687U (en) | 2020-07-22 | 2020-07-22 | High-speed service area sewage treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213446687U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114590959A (en) * | 2022-03-01 | 2022-06-07 | 贵州高投生态产业有限公司 | ECOF four-micro-physical sewage treatment system, treatment process and application |
| CN114873874A (en) * | 2022-06-17 | 2022-08-09 | 浙江凯弘环境技术有限公司 | Expressway service area sewage treatment device and method |
| CN115536219A (en) * | 2022-11-14 | 2022-12-30 | 江苏方天电力技术有限公司 | Treatment method of domestic sewage of temporary camping site |
| CN115571996A (en) * | 2022-07-08 | 2023-01-06 | 深圳能源资源综合开发有限公司 | Method and system for treating pond type bullfrog breeding tail water |
| CN119100548A (en) * | 2024-11-08 | 2024-12-10 | 江苏信宁新型建材有限公司 | Water recycling system in cement plant |
-
2020
- 2020-07-22 CN CN202021456206.2U patent/CN213446687U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114590959A (en) * | 2022-03-01 | 2022-06-07 | 贵州高投生态产业有限公司 | ECOF four-micro-physical sewage treatment system, treatment process and application |
| CN114873874A (en) * | 2022-06-17 | 2022-08-09 | 浙江凯弘环境技术有限公司 | Expressway service area sewage treatment device and method |
| CN115571996A (en) * | 2022-07-08 | 2023-01-06 | 深圳能源资源综合开发有限公司 | Method and system for treating pond type bullfrog breeding tail water |
| CN115536219A (en) * | 2022-11-14 | 2022-12-30 | 江苏方天电力技术有限公司 | Treatment method of domestic sewage of temporary camping site |
| CN119100548A (en) * | 2024-11-08 | 2024-12-10 | 江苏信宁新型建材有限公司 | Water recycling system in cement plant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213446687U (en) | High-speed service area sewage treatment system | |
| CN202898159U (en) | Sewage treatment device | |
| CN109179910A (en) | A kind of domestic sewage treatment process | |
| CN201062224Y (en) | Sewage water treatment system for refining cotton | |
| CN102775025A (en) | Municipal life wastewater treatment system with high efficiency and low energy consumption | |
| CN108383320B (en) | Integrated treatment method for livestock and poultry breeding wastewater | |
| CN107311405A (en) | Urban sewage treatment system and technique | |
| CN111056698A (en) | Wastewater treatment process of multistage biological contact oxidation method | |
| CN113307456A (en) | Improved sewage treatment method and device for MBBR (moving bed biofilm reactor) process | |
| CN113754210A (en) | Small sewage treatment system and method of fully-buried reinforced concrete structure | |
| CN113087314A (en) | Wastewater treatment system and treatment process | |
| CN106242192A (en) | One way of life Sewage zero discharge system | |
| CN209890449U (en) | Wastewater MBR and ozone combined treatment device for municipal sewage plant | |
| CN215975459U (en) | Small-size sewage treatment system of buried reinforced concrete structure entirely | |
| CN202688146U (en) | Domestic sewage purifying recycling device | |
| CN208071525U (en) | Buried intelligent sewage disposal system | |
| CN202543002U (en) | Sewage treatment system | |
| CN211226837U (en) | Modularization sewage treatment plant | |
| CN211570390U (en) | Cleaning wastewater treatment system | |
| CN113024012A (en) | Distributed household sewage treatment equipment and sewage treatment method thereof | |
| CN205133343U (en) | Rubbish transfer station sewage treatment system | |
| CN208308624U (en) | Integrated intelligent sewage-treatment plant | |
| CN208071544U (en) | A kind of railway communication system production wastewater treatment system | |
| CN213037623U (en) | MBR (membrane bioreactor) integrated treatment device for domestic sewage | |
| CN217351071U (en) | Improved sewage treatment device for MBBR (moving bed biofilm reactor) process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210615 |