CN114014492A - Low carbon nitrogen ratio sewage treatment system - Google Patents

Low carbon nitrogen ratio sewage treatment system Download PDF

Info

Publication number
CN114014492A
CN114014492A CN202111230570.6A CN202111230570A CN114014492A CN 114014492 A CN114014492 A CN 114014492A CN 202111230570 A CN202111230570 A CN 202111230570A CN 114014492 A CN114014492 A CN 114014492A
Authority
CN
China
Prior art keywords
tank
pipe
sewage treatment
anoxic
low carbon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111230570.6A
Other languages
Chinese (zh)
Inventor
邱敬贤
曾木平
孙慧智
何曦
周益辉
王胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changsha Industrial Research Institute Environmental Protection Co Ltd
Original Assignee
Changsha Industrial Research Institute Environmental Protection Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Changsha Industrial Research Institute Environmental Protection Co Ltd filed Critical Changsha Industrial Research Institute Environmental Protection Co Ltd
Priority to CN202111230570.6A priority Critical patent/CN114014492A/en
Publication of CN114014492A publication Critical patent/CN114014492A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • C02F1/32Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/58Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/105Phosphorus compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/04Disinfection
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/16Regeneration of sorbents, filters
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • C02F3/12Activated sludge processes
    • C02F3/1236Particular type of activated sludge installations
    • C02F3/1268Membrane bioreactor systems
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/301Aerobic and anaerobic treatment in the same reactor
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00Aeration of stretches of water
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Landscapes

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

Abstract

The invention discloses a sewage treatment system with a low carbon-nitrogen ratio, which comprises an adjusting tank, a lift pump, an integrated reactor, a sludge tank, an air bag and a fan, wherein the adjusting tank is connected with the integrated reactor through the lift pump and a main water inlet pipe; the integrated reactor comprises an anoxic tank, an anaerobic tank, an aerobic tank, a sedimentation tank and a denitrification filter tank which are sequentially connected in series, wherein the aerobic tank returns to the anoxic tank through a nitrification liquid return pipe, and the sedimentation tank returns to the anoxic tank through a sludge return pipe; the bottom of the sedimentation tank is connected to a sludge tank, and the sludge tank returns to the anoxic tank through a supernatant return pipe. The sewage treatment system with the low carbon-nitrogen ratio has the advantages of good nitrogen and phosphorus removal effect, suitability for sewage treatment with the low carbon-nitrogen ratio and no need of an external carbon source.

Description

Low carbon nitrogen ratio sewage treatment system
Technical Field
The invention relates to a sewage treatment system with a low carbon-nitrogen ratio, and belongs to the technical field of sewage treatment.
Background
In recent years, with the development of economy and the improvement of environmental protection requirements in China, the environmental pollution is increasingly serious, especially water resource pollution, so that water resources in China are more tense, and the prospect of sewage treatment is huge. However, with the change of life style of people, the COD concentration in the pipe network and the sewage plant is continuously reduced, the nitrogen concentration is continuously increased, and the trend of low carbon-nitrogen ratio of sewage treatment is increasingly serious.
The low carbon-nitrogen ratio of sewage causes that organic matters in water cannot meet the carbon source requirements of nitrification and denitrification, the total nitrogen removal effect is influenced, the problem of insufficient carbon source is often solved by adding carbon source, but the treatment cost is correspondingly increased, the adding amount of the added carbon source is not easy to control, secondary pollution is easily caused, the effluent quality is influenced, and even the effluent COD exceeds the standard. Therefore, it is desirable to provide a sewage treatment system and method under the condition of low carbon-nitrogen ratio water inlet.
Disclosure of Invention
The invention aims to solve the problem of poor nitrogen and phosphorus treatment effect under the condition of insufficient carbon source of influent water quality, and provides a sewage treatment system with a low carbon-nitrogen ratio, which has the advantages of good nitrogen and phosphorus removal effect, suitability for sewage treatment with a low carbon-nitrogen ratio and no need of an additional carbon source.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a sewage treatment system with a low carbon-nitrogen ratio comprises an adjusting tank, a lift pump, an integrated reactor, a sludge tank, a gas bag and a fan, wherein the adjusting tank is connected with the integrated reactor through the lift pump and a main water inlet pipe; the integrated reactor comprises an anoxic tank, an anaerobic tank, an aerobic tank, a sedimentation tank and a denitrification filter tank which are sequentially connected in series, wherein the aerobic tank returns to the anoxic tank through a nitrification liquid return pipe, and the sedimentation tank returns to the anoxic tank through a sludge return pipe; the bottom of the sedimentation tank is connected to a sludge tank, and the sludge tank returns to the anoxic tank through a supernatant return pipe.
Furthermore, the lift pump is used for spare one, is located the equalizing basin bottom, takes coupling device certainly, and the equalizing basin entrance sets up the grid for get rid of material such as debris, suspended solid, floater, regularly clear up.
Furthermore, the main water inlet pipe is connected with a first water inlet pipe and a second water inlet pipe, and the first water inlet pipe is connected with the anoxic pond; the second water inlet pipe is connected with the anaerobic tank. In the invention, the integrated reactor adopts two points of water inflow, the water inflow from the anoxic tank and the anaerobic tank respectively is carried out, and the water inflow volume ratio is 50-70%: 50 to 30 percent.
Furthermore, the anoxic tank and the anaerobic tank are separated by a first guide plate, the bottoms of the anoxic tank and the anaerobic tank are communicated, wastewater enters the anaerobic tank from the anoxic tank, a perforated aeration pipe is arranged at the bottom of the anoxic tank and is connected with an air bag through a third aeration branch pipe for stirring and aeration, the dissolved oxygen concentration of the anoxic tank is 0.2-0.5 mg/L, and the dissolved oxygen concentration of the anaerobic tank is less than 0.2 mg/L.
Furthermore, the effluent of the anaerobic tank enters an aerobic tank through overflow, a second guide plate is arranged in the middle of the aerobic tank, MBBR filler is added, the filling rate of the MBBR filler is 20% -50%, the size of the MBBR filler is 10-30 mm, the MBBR filler is made of polyurethane, PE and the like and used for increasing the biomass of the aerobic tank and improving the removal effect, an aeration device is further arranged at the bottom of the aerobic tank, and the aeration device is connected with an air bag through a second aeration branch pipe.
Furthermore, intercepting nets are arranged at the water outlet of the aerobic tank and the water inlet end of the nitrifying liquid return pipe and used for intercepting MBBR (moving bed biofilm reactor) fillers of the aerobic tank and preventing the fillers from escaping into the sedimentation tank and flowing back to the anoxic tank, the intercepting nets are of rectangular, circular and other structures, small holes are formed in the intercepting nets, and the size of each small hole is 5-20mm smaller than that of the MBBR fillers.
Furthermore, the effluent of the aerobic tank enters the sedimentation tank through an overflow pipe, and the overflow pipe is of a T-shaped structure, is positioned in the middle of the sedimentation tank and is used for feeding water in the middle and discharging water around.
Further, the sedimentation tank bottom is equipped with the bagger, and the bagger is the toper structure, and the bagger inclined plane is 45 ~ 60 with horizontal plane contained angle, and the bagger bottom is equipped with the mud discharge opening for regularly arrange mud, the mud discharge opening is connected to the sludge impoundment, adopts gravity or air stripping mud discharge.
Furthermore, a triangular overflow trough is arranged at the upper end of the sedimentation tank, the effluent of the sedimentation tank enters the bottom of the denitrification filter tank through the overflow trough and a flow pipe, a filter material and a filter brick are sequentially arranged in the denitrification filter tank from top to bottom, and the filter material is one or more of ceramsite, activated carbon, anthracite, zeolite and volcanic rock; the denitrification filter tank adopts an up-flow type, and water is distributed from a bottom water distribution pipe, and then is discharged from the upper part after being sequentially filtered by filter bricks and filter materials.
Furthermore, the denitrification filter tank is backwashed by adopting gravity, backwash inlet water enters the upper part of the denitrification filter tank from the clean water tank, the liquid level of the clean water tank is higher than that of the denitrification filter tank, backwash is carried out by utilizing the liquid level difference, and extra backwash equipment and pipeline arrangement are not needed.
Furthermore, the effluent water after the denitrification filter tank is subjected to denitrification is directly discharged from the bottom of the denitrification filter tank and returns to the regulating tank through a backwashing water return pipe.
Further, the nitrifying liquid return pipe is connected with the air bag through a second air stripping pipe and a fourth aeration branch pipe; the sludge return pipe is connected with the air bag through the first air stripping pipe and the fourth aeration branch pipe; the supernatant liquid reflux pipe is connected with the air bag through a first aeration branch pipe, and the nitrification liquid reflux, the sludge reflux and the supernatant liquid reflux all adopt an air stripping reflux mode.
Furthermore, a waste water outlet of the denitrification filter tank is connected with an ultraviolet sterilizer, and the outlet water enters the ultraviolet sterilizer for sterilization and then is discharged after reaching standards, wherein the ultraviolet sterilizer is preferably an overflow ultraviolet sterilizer.
Furthermore, any one of the water outlet end of the aerobic tank, the water inlet end of the sedimentation tank and the return sludge pipe is connected with a chemical phosphorus removal dosing tank through a dosing pump.
The beneficial results of the invention are as follows:
the invention integrates the inverted A2O, the MBBR filler, the sedimentation filter and the denitrification filter into a whole, strictly controls the inlet and outlet sequence of the treated wastewater, and simultaneously adopts the supernatant of the sludge tank to supplement a carbon source to realize the recycling of the wastewater. According to the invention, the inverted A2O process is adopted for two-point water inlet, the anoxic section is arranged in front, a carbon source is preferentially obtained, the denitrification effect is improved, and the MBBR filler is added through the aerobic section and the aeration dissolved oxygen concentration is adjusted, so that a biomembrane growing on the surface of the MBBR filler generates an oxygen concentration gradient, the generation of synchronous nitrification and denitrification is promoted, and the ammonia nitrogen and total nitrogen removal effect is improved; the rear end utilizes the rear denitrification filter to further remove the total nitrogen, and the system is provided with an internal reflux and an external reflux, thereby providing the nitrogen and phosphorus removal efficiency. The inverted A2O process utilizes the hunger effect and the colony effect to strengthen the dephosphorization effect, ensures the standard reaching by configuring chemical dephosphorization, and ensures the standard reaching discharge of suspended matters by the double filtration of a sedimentation filter tank and a denitrification filter tank. The method has the advantages of good denitrification and dephosphorization effects, suitability for sewage treatment with low carbon-nitrogen ratio, no need of external carbon source and the like.
Drawings
FIG. 1 is a schematic structural view of a low carbon-nitrogen ratio sewage treatment system according to the present invention;
wherein, 1, adjusting a pool; 2. an anoxic tank; 3. an anaerobic tank; 4. an aerobic tank; 5. a sedimentation tank; 6. a denitrification filter; 7. a sludge tank; 8. air bags; 9. a fan; 10. a chemical phosphorus removal dosing tank; 11. a dosing pump; 12. an ultraviolet sterilizer; 13. a clear water tank;
101. a grid; 102. a lift pump; 103. a main water inlet pipe; 104. a first water inlet branch pipe; 105. a second water inlet branch pipe;
201. a first baffle; 202. a perforating aeration device; 203. a nitrifying liquid return pipe; 204. a sludge return pipe; 205. a supernatant liquid return pipe;
401. a second baffle; 402. MBBR filler; 403. an aeration device; 404. an intercepting net;
501. an overflow pipe; 502. a mud bucket; 503. a sludge discharge port; 504. a triangular overflow trough;
601. filtering the material; 602. filtering bricks; 603. a water distribution pipe; 604. a backwash water return pipe;
801. a first aeration branch pipe; 802. a second aeration branch pipe; 803. a third aeration branch pipe; 804. a fourth aeration branch pipe; 805. a first stripping tube; 806. a second stripper tube.
Detailed Description
The present invention is further illustrated by the following examples, it being understood that the examples described are only a few examples of the present invention and are not intended to limit the invention to the embodiments described. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the sewage treatment system with low carbon-nitrogen ratio of the present invention comprises an adjusting tank 1, a lift pump 102, an integrated reactor, a sludge tank 7, a gas bag 8 and a fan 9, wherein the adjusting tank 1 is connected with the integrated reactor through the lift pump 102 and a main water inlet pipe 103; the integrated reactor comprises an anoxic tank 2, an anaerobic tank 3, an aerobic tank 4, a sedimentation tank 5 and a denitrification filter 6 which are sequentially connected in series; the aerobic tank 4 returns to the anoxic tank 2 through a nitrifying liquid return pipe 203, and the sedimentation tank 5 returns to the anoxic tank 2 through a sludge return pipe 204; the bottom of the sedimentation tank 5 is connected to a sludge tank 7, and the sludge tank 7 returns to the anoxic tank 2 through a supernatant return pipe 205.
Waste water firstly enters the adjusting tank 1 after intercepting floating objects through the grating 101, then enters the integrated reactor along the main water inlet pipe 103 through the lift pump 102 (one is used for the next, and the other is provided with a coupling device), enters the anoxic tank 2 through the first water inlet branch pipe 104, and simultaneously enters the anaerobic tank 3 through the second water inlet branch pipe 105, wherein the water inlet volume ratio anoxic tank 2: the anaerobic tank 3 is 5: 7-3: 5; the anoxic pond 2 preferentially obtains a carbon source, the anoxic pond 2 and the anaerobic pond 3 are separated by the first guide plate 201 and are communicated at the bottoms, a perforated aeration device 202 is arranged at the bottom of the anoxic pond 2, a perforated aeration pipe 202 is connected with an air bag 8 through a first aeration branch pipe 801 and is used for stirring and aeration, the dissolved oxygen concentration of the anoxic pond 2 is 0.2-0.5 mg/L, and the dissolved oxygen concentration of the anaerobic pond 3 is less than 0.2 mg/L. The water inlet of the anoxic tank 2 is mixed with nitrifying liquid which is refluxed by the air stripping of a nitrifying liquid reflux pipe 203 of the aerobic tank 4 and sludge which is refluxed by the air stripping of a sludge reflux pipe 204 of the sedimentation tank 5, so that the denitrification of the anoxic tank 2 preferentially obtains a carbon source and the denitrification effect is improved, wherein the reflux ratio of the nitrifying liquid is 100-400%, the reflux ratio of the sludge is 0-100%, and the nitrifying liquid reflux pipe 203 is connected with the air bag 8 through a first air stripping pipe 805 and a third aeration branch pipe 803; the sludge return pipe 204 is connected with the air bag 8 through a second stripping pipe 806 and a third aeration branch pipe 803; the nitrification liquid reflux and the sludge reflux both adopt air stripping reflux, so that the energy consumption is saved.
The effluent of the anaerobic tank 3 enters the aerobic tank 4 through overflow, and the middle of the aerobic tank is provided with a second guide plate 401, so that the retention time of the wastewater is improved, the short flow is avoided, the turbulence is increased, the mixing is uniform, and the contact time of the air and the wastewater is improved. The filling rate of the MBBR filler 402 in the aerobic tank 4 is 20-50%, the size is 10-30 mm, the size of the filler is larger than the size of the small holes of the interception net, the blockage is prevented, and the MBBR filler is made of polyurethane, PE and the like. The bottom of the aerobic tank 4 is also provided with an aeration device 403, and the aeration device 403 is connected with the air bag 8 through a second aeration branch pipe 802. The wastewater is biochemically treated under the combined action of the bottom aeration device 403 and the MBBR filler 402 to remove pollutants, and meanwhile, the aeration amount of the aerobic tank 4 can be adjusted to cause the biofilm on the surface of the MBBR filler 402 to cause solution concentration difference, so that the synchronous nitrification and denitrification are promoted. The water inlet of the nitrifying liquid return pipe 203 and the water outlet of the aerobic tank 4 are both positioned in the protection of the interception net 404, so that the MBBR filler 402 is prevented from escaping. The surface of the intercepting net 404 is uniformly provided with small holes, the aperture of each small hole is smaller than the size of the MBBR filler 402, so that the MBBR filler 402 is prevented from blocking the intercepting net 404, and meanwhile, when the intercepting net 404 is inadvertently blocked by the MBBR filler 402, the intercepting net 404 can be cleaned by using gas in the second gas stripping pipe 806, so that the blocked MBBR filler 402 falls off. The interception net 404 is in a rectangular or round structure, small holes are uniformly distributed in the interception net 404, the size of each small hole is smaller than that of the MBBR packing 402 and is 5-20 mm. In addition, a chemical phosphorus removal dosing tank 10 is configured according to requirements, and a dosing pump 11 is used for dosing and removing phosphorus at the water outlet end of the aerobic tank 4, so that the phosphorus is ensured to reach the standard and be discharged according to the discharge.
The effluent of the aerobic tank 4 enters the sedimentation tank 5 through an overflow pipe 501 with a T-shaped structure, solid-liquid separation is carried out by adopting a mode of feeding water in the middle and discharging water at the periphery, and sediments are deposited in a bottom mud bucket 502. The overflow pipe 501 is arranged at a position above the mud bucket 502 at one end of the vertical pipe, extends out of the water surface at the other end of the vertical pipe, and is connected with the aerobic tank 4. The bagger 502 is the toper structure, and the bagger swash plate is 45 ~ 60 with the horizontal plane contained angle. The bottom of the mud bucket 502 is provided with a mud discharging port 503 for discharging mud at regular time. The sludge enters a sludge tank 7 through a sludge discharge opening 503 for sludge concentration. The sludge tank 7 returns to the anoxic tank 2 through a supernatant return pipe 205, the supernatant return pipe 205 is connected with the air bag 8 through a fourth aeration branch pipe 804, the concentrated supernatant of the sludge is returned to the anoxic tank 2 through the supernatant return pipe 205 in an air stripping mode, carbon source supplement is carried out on the wastewater, and the return flow is 1/50-1/5 of the treated water amount.
The effluent of the sedimentation tank 5 enters the bottom of the denitrification filter 6 through an upper end triangular overflow groove 504, and a filter material 601 and a filter brick 602 are sequentially arranged in the denitrification filter 6 from top to bottom, wherein the filter material is one or more of ceramsite, activated carbon, anthracite, zeolite and volcanic rock; the denitrification filter tank adopts an up-flow type, after water is distributed by a wastewater water distribution pipe 603, the wastewater is filtered by a filter brick 602 and a filter material 601 in sequence, enters the ultraviolet sterilizer 12 from the upper part of the denitrification filter tank 6, and is discharged after reaching the standard after being sterilized. The backwashing of the denitrification filter 6 utilizes the effluent of the clear water tank 13 with the liquid level higher than that of the denitrification filter 6 to carry out gravity cleaning without additional backwashing equipment and pipeline devices, and the effluent after the backwashing is directly discharged from the bottom of the denitrification filter 6 and returns to the regulating tank 1 through a backwashing water return pipe 604.

Claims (10)

1. The utility model provides a low carbon nitrogen ratio sewage treatment system which characterized in that: the device comprises a regulating tank, a lift pump, an integrated reactor, a sludge tank, an air bag and a fan, wherein the regulating tank is connected with the integrated reactor through the lift pump and a main water inlet pipe; the integrated reactor comprises an anoxic tank, an anaerobic tank, an aerobic tank, a sedimentation tank and a denitrification filter tank which are sequentially connected in series, wherein the aerobic tank returns to the anoxic tank through a nitrification liquid return pipe, and the sedimentation tank returns to the anoxic tank through a sludge return pipe; the bottom of the sedimentation tank is connected to a sludge tank, and the sludge tank returns to the anoxic tank through a supernatant return pipe.
2. The low carbon to nitrogen ratio sewage treatment system of claim 1, wherein: the lifting pump is used as a spare pump, is positioned at the bottom of the adjusting tank and is provided with a coupling device, and a grid is arranged at the inlet of the adjusting tank; the main water inlet pipe is connected with a first water inlet pipe and a second water inlet pipe, and the first water inlet pipe is connected with the anoxic pond; the second water inlet pipe is connected with the anaerobic tank, and the volume ratio of the water inlet of the anoxic tank to the water inlet of the anaerobic tank is 50-70%: 50 to 30 percent.
3. The low carbon to nitrogen ratio sewage treatment system of claim 1, wherein: the anaerobic tank is characterized in that the anoxic tank and the anaerobic tank are separated by a first guide plate, the bottoms of the anoxic tank and the anaerobic tank are communicated, wastewater enters the anaerobic tank from the anoxic tank, a perforated aeration pipe is arranged at the bottom of the anoxic tank and is connected with an air bag through a third aeration branch pipe, the dissolved oxygen concentration of the anoxic tank is 0.2-0.5 mg/L, and the dissolved oxygen concentration of the anaerobic tank is less than 0.2 mg/L.
4. The low carbon to nitrogen ratio sewage treatment system of claim 1, wherein: the effluent of the anaerobic tank enters the aerobic tank through overflow, a second guide plate is arranged in the middle of the aerobic tank, MBBR filler is added, the filling rate of the MBBR filler is 20% -50%, the size of the MBBR filler is 10-30 mm, the MBBR filler is made of polyurethane or PE, an aeration device is further arranged at the bottom of the aerobic tank, and the aeration device is connected with an air bag through a second aeration branch pipe.
5. The low carbon to nitrogen ratio sewage treatment system of claim 4, wherein: and intercepting nets are arranged at the water outlet of the aerobic tank and the water inlet end of the nitrifying liquid return pipe and used for intercepting MBBR (moving bed biofilm reactor) fillers in the aerobic tank, and small holes are formed in the intercepting nets, and the size of each small hole is 5-20mm smaller than that of the MBBR fillers.
6. The low carbon to nitrogen ratio sewage treatment system of claim 1, wherein: the effluent of the aerobic tank enters the sedimentation tank through an overflow pipe, and the overflow pipe is of a T-shaped structure, is positioned in the middle of the sedimentation tank and adopts a mode of feeding water in the middle and discharging water around; the sedimentation tank bottom is equipped with the bagger, and the bagger is the toper structure, and the bagger inclined plane is 45 ~ 60 with horizontal plane contained angle, and the bagger bottom is equipped with the mud discharging opening, and the mud discharging opening is connected to the sludge impoundment.
7. The low carbon to nitrogen ratio sewage treatment system of claim 1, wherein: the upper end of the sedimentation tank is provided with a triangular overflow trough, the effluent of the sedimentation tank enters the bottom of the denitrification filter tank through the overflow trough and a flow pipe, and the denitrification filter tank is internally provided with a filter material and a filter brick from top to bottom in sequence, wherein the filter material is one or more of ceramsite, activated carbon, anthracite, zeolite and volcanic rock; the denitrification filter tank adopts an up-flow type, and water is distributed from a bottom water distribution pipe, and then is discharged from the upper part after being sequentially filtered by filter bricks and filter materials.
8. The low carbon to nitrogen ratio sewage treatment system of claim 1, wherein: backwashing the denitrification filter by adopting gravity, wherein backwashing inlet water enters the upper part of the denitrification filter from a clean water tank, and the liquid level of the clean water tank is higher than that of the denitrification filter; and the effluent after the denitrification filter tank is subjected to backwashing is directly discharged from the bottom of the denitrification filter tank and returns to the regulating tank through a backwashing water return pipe.
9. The low carbon to nitrogen ratio sewage treatment system of claim 1, wherein: the nitrifying liquid return pipe is connected with the air bag through a second air stripping pipe and a fourth aeration branch pipe; the sludge return pipe is connected with the air bag through the first air stripping pipe and the fourth aeration branch pipe; the supernatant liquid reflux pipe is connected with the air bag through a first aeration branch pipe, and the nitrification liquid reflux, the sludge reflux and the supernatant liquid reflux all adopt an air stripping reflux mode.
10. The low carbon to nitrogen ratio sewage treatment system of claim 1, wherein: the waste water outlet of the denitrification filter tank is connected with an ultraviolet sterilizer; the water outlet end of the aerobic tank is connected with a chemical dephosphorization dosing tank through a dosing pump.
CN202111230570.6A 2021-10-22 2021-10-22 Low carbon nitrogen ratio sewage treatment system Pending CN114014492A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111230570.6A CN114014492A (en) 2021-10-22 2021-10-22 Low carbon nitrogen ratio sewage treatment system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111230570.6A CN114014492A (en) 2021-10-22 2021-10-22 Low carbon nitrogen ratio sewage treatment system

Publications (1)

Publication Number Publication Date
CN114014492A true CN114014492A (en) 2022-02-08

Family

ID=80056981

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111230570.6A Pending CN114014492A (en) 2021-10-22 2021-10-22 Low carbon nitrogen ratio sewage treatment system

Country Status (1)

Country Link
CN (1) CN114014492A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116239257A (en) * 2023-03-02 2023-06-09 北控水务(中国)投资有限公司 Full-modularized sewage treatment device
CN116693054A (en) * 2023-06-19 2023-09-05 安徽中源锦天环境科技股份有限公司 High-efficient deep bed jar and sewage treatment system thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205313182U (en) * 2015-12-09 2016-06-15 浦华环保股份有限公司 Sewage treatment plant sludge treatment system
CN110386740A (en) * 2019-08-16 2019-10-29 青岛思普润水处理股份有限公司 A kind of sewage second-level processing system and processing method
CN113429065A (en) * 2021-06-04 2021-09-24 长沙工研院环保有限公司 Two-point water inlet biological rotary drum sewage treatment system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205313182U (en) * 2015-12-09 2016-06-15 浦华环保股份有限公司 Sewage treatment plant sludge treatment system
CN110386740A (en) * 2019-08-16 2019-10-29 青岛思普润水处理股份有限公司 A kind of sewage second-level processing system and processing method
CN113429065A (en) * 2021-06-04 2021-09-24 长沙工研院环保有限公司 Two-point water inlet biological rotary drum sewage treatment system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
江苏省住房和城乡建设厅编: "《江苏省太湖流域城镇污水处理厂 提标建设技术导则》", 中国环境出版集团, pages: 42 - 43 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116239257A (en) * 2023-03-02 2023-06-09 北控水务(中国)投资有限公司 Full-modularized sewage treatment device
CN116693054A (en) * 2023-06-19 2023-09-05 安徽中源锦天环境科技股份有限公司 High-efficient deep bed jar and sewage treatment system thereof

Similar Documents

Publication Publication Date Title
CN109879425B (en) Equipment for advanced phosphorus and nitrogen removal of sewage treatment
CN114014492A (en) Low carbon nitrogen ratio sewage treatment system
CN117164167B (en) Fishery photovoltaic complementary ecological filtration dam system for aquaculture tail water
CN210001729U (en) purifying tanks suitable for decentralized sewage treatment
CN111333271A (en) Sewage treatment system, application thereof and sewage treatment method
CN110627196A (en) Inclined tube precipitation device and high ammonia nitrogen organic sewage treatment system
CN212655653U (en) Anti-blocking and enhanced anaerobic ammonia oxidation and denitrification constructed wetland system
CN113200605A (en) Undercurrent wetland system suitable for low carbon nitrogen ratio sewage purification
CN209872675U (en) Rural small-size domestic sewage is collected, is handled, retrieval and utilization integration system
CN114906986B (en) Integrated sewage treatment device and method with adjustable process
CN216005539U (en) Two-point water inlet enhanced nitrogen and phosphorus removal sewage treatment system
CN201154935Y (en) Chemical fabrics waste water treatment plant
CN217437855U (en) Rural sewage treatment plant
CN113716815B (en) A integration sled dress device for handling high nitrogen phosphorus content domestic sewage
CN112537887B (en) MBBR (moving bed biofilm reactor) system for strengthening ammonia nitrogen treatment of high-efficiency flocculation sedimentation tank and operation method
CN201648121U (en) Horizontal undercurrent artificial wetland
CN214299758U (en) High-efficient flocculation and precipitation pond intensification ammonia nitrogen handles MBBR system
CN213141749U (en) Pretreatment tank and water body treatment system using same
CN212076761U (en) Container type integrated sewage treatment equipment
CN210796140U (en) Domestic sewage treatment device
CN211141630U (en) Inclined tube precipitation device and high ammonia nitrogen organic sewage treatment system
CN113716803A (en) Integrated enhanced denitrification sewage treatment device and treatment method
CN207827959U (en) A kind of biological aerated filter of processing biogas slurry
CN213012496U (en) Sewage treatment device for river drain outlet
CN214735225U (en) Processing system of intensification aquaculture tail water

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20220208

RJ01 Rejection of invention patent application after publication