CN218709704U - Sewage treatment system - Google Patents
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- CN218709704U CN218709704U CN202221882477.3U CN202221882477U CN218709704U CN 218709704 U CN218709704 U CN 218709704U CN 202221882477 U CN202221882477 U CN 202221882477U CN 218709704 U CN218709704 U CN 218709704U
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Abstract
The utility model provides a sewage treatment system, include: the system comprises a pretreatment system, a biological treatment system, an advanced treatment system and a sludge treatment system; the sludge discharge port of the pretreatment system and the residual sludge discharge port of the biological treatment system are connected to the sludge inlet of the sludge treatment system; a sludge filtrate outlet of the sludge treatment system is connected to a sludge filtrate return port of the pretreatment system; the water outlet of the pretreatment system is connected to the water inlet of the biological treatment system; and the water outlet of the biological treatment system is respectively connected with the water inlet of the denitrification filter tank and the water inlet of the RO device. The utility model provides a sewage treatment system can effectively improve sewage treatment effect, the utility model discloses can ensure that sewage treatment plant goes out water quality of water homoenergetic under the different operational aspect in summer and winter and stably reaches Beijing standard A standard.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, concretely relates to sewage treatment system.
Background
Along with the development of urbanization and the improvement of the living standard of people, the discharge amount of urban domestic sewage is increased, and the sewage components are gradually complicated due to the fact that industrial wastewater is discharged into a municipal pipe network, the sewage and the wastewater are collected uniformly and conveyed to a sewage treatment plant for centralized treatment, the method is a main treatment mode at present, and the treated effluent is discharged to a natural water body.
At present, the discharge standard of most sewage treatment plants is the primary standard A in the discharge standard of pollutants for municipal sewage treatment plants (GB 18918-2002), and pollutants such as BOD, TN and the like in the standard still have certain influence on natural water bodies, so that the standard upgrading and modification of the effluent standard of the sewage treatment plants are urgently needed. Under the background, the Beijing city issues the discharge standard of water pollutants for urban sewage treatment plants (DB 11/890-2012), the urban sewage treatment plants discharging into II and III water bodies in the Beijing city are required to execute the standard A, and the standard A of the Beijing standard has higher requirements on indexes such as BOD, COD, TN, TP and the like in the effluent. The first-class A standard and the Beijing standard A standard are compared with each other in water quality indexes as shown in the following table:
TABLE 1 comparison table of first class A standard and Beijing standard A water quality index
At present, BOD, COD and TP of effluent of a sewage treatment plant can not meet the requirements of the Beijing standard A, and particularly in winter, the sewage treatment effect is further reduced due to the influence of temperature on the activity of nitrobacteria and denitrifying bacteria adopted by sewage treatment, so that how to improve the sewage treatment effect is a current urgent matter to be solved.
SUMMERY OF THE UTILITY MODEL
The defect that exists to prior art, the utility model provides a sewage treatment system guarantees under the different operational aspect in summer and winter, and sewage treatment plant goes out water quality of water homoenergetic and stabilizes up to standard.
The utility model adopts the technical scheme as follows:
the utility model provides a sewage treatment system, include: the system comprises a pretreatment system, a biological treatment system, an advanced treatment system and a sludge treatment system;
wherein: the advanced treatment system comprises a denitrification filter tank, a catalytic oxidation tank, a disinfection contact tank, an RO device, an RO water production tank and an RO concentrated water tank;
the sludge discharge port of the pretreatment system and the residual sludge discharge port of the biological treatment system are jointly connected to the sludge inlet of the sludge treatment system; a sludge filtrate outlet of the sludge treatment system is connected to a sludge filtrate return port of the pretreatment system;
the water outlet of the pretreatment system is connected to the water inlet of the biological treatment system; the water outlet of the biological treatment system is respectively connected with the water inlet of the denitrification filter tank and the water inlet of the RO device;
the water outlet of the denitrification filter tank is connected with the water inlet of the catalytic oxidation tank; the water outlet of the catalytic oxidation tank is connected with the water inlet of the disinfection contact tank, and the denitrification filter tank, the catalytic oxidation tank and the disinfection contact tank form a summer operation unit;
the fresh water outlet of the RO device is connected to the water inlet of the RO water producing tank; a blending pipeline is led out from the position of the water inlet of the RO device, and is connected to the water inlet of the disinfection contact tank after being merged with the water outlet of the RO water generating tank; the concentrated water outlet of the RO device is connected to the water inlet of the denitrification filter tank after passing through the RO concentrated water tank; the RO device, the RO water producing tank, the RO concentrated water tank, the denitrification filter tank and the disinfection contact tank form a winter operation unit.
Preferably, the denitrification filter is provided with a carbon source feeding port.
Preferably, the catalytic oxidation pond is an ozone oxidation pond or a Fenton oxidation pond.
Preferably, the disinfection contact tank is provided with a disinfectant adding port.
Preferably, the pretreatment system comprises a coarse grid unit, a fine grid unit, an aeration grit chamber and a high-efficiency sedimentation tank which are connected in series.
Preferably, the biological treatment system comprises A connected in series 2 An O/AO pool and an MBR membrane separation pool.
Preferably, A is 2 The O/AO pool comprises an anaerobic zone, an anoxic zone, an aerobic zone, a forced denitrification zone and a forced nitrification zone;
the anaerobic zone, the anoxic zone, the aerobic zone, the forced denitrification zone and the forced nitrification zone are connected in series and then connected with the MBR membrane separation tank;
in addition, a sludge return outlet of the MBR membrane separation tank is connected to a sludge return inlet of the aerobic zone; a mixed liquid reflux outlet of the aerobic zone is connected to a mixed liquid reflux inlet of the anoxic zone; and a sludge backflow outlet of the anoxic zone is connected to a sludge backflow inlet of the anaerobic zone.
Preferably, the sludge treatment system comprises a sludge concentration tank, a sludge dewatering device and a sludge filtrate dephosphorization tank;
the sludge discharge port of the high-efficiency sedimentation tank and the residual sludge discharge port of the MBR membrane separation tank are connected to the sludge inlet of the sludge concentration tank; a sludge outlet of the sludge concentration tank is connected to a sludge inlet of the sludge dewatering device;
and a supernatant outlet of the sludge concentration tank and a filtrate outlet of the sludge dewatering device are connected to a filtrate inlet of the sludge filtrate dephosphorization tank, and a filtrate outlet of the sludge filtrate dephosphorization tank is connected to a sludge filtrate return port of the high-efficiency sedimentation tank.
Preferably, the sludge dewatering device is a plate-and-frame filter press, a centrifugal dehydrator or a stacked screw dehydrator.
The utility model provides a sewage treatment system has following advantage:
the utility model provides a sewage treatment system can effectively improve sewage treatment effect, the utility model discloses can ensure that sewage treatment plant goes out water quality of water homoenergetic under the different operational aspect in summer and winter and stably reaches Beijing standard A standard.
Drawings
FIG. 1 is a schematic structural view of a sewage treatment system provided by the present invention;
FIG. 2 is a schematic structural view of the biological treatment system provided by the present invention.
Wherein:
in the figure: 1. coarse grid unit, 2 fine grid unit, 3 aeration grit chamber, 4 high efficiency sedimentation tank, 5.A 2 The system comprises an O/AO pool, a 6.MBR membrane separation pool, a 7. Denitrification filter pool, a 8. Catalytic oxidation pool, a 9. Disinfection contact pool, a 10.RO device, a 11.RO product water pool, a 12.RO concentrated water pool, a 13. Sludge concentration pool, a 14. Sludge dewatering device, a 15. Sludge filtrate dephosphorization pool, a 16. Anaerobic zone, a 17. Anoxic zone, an 18. Aerobic zone, a 19. Forced denitrification zone and a 20. Forced nitrification zone.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a sewage treatment system, it accords with Beijing mark A standard to go out water, refers to figure 1, include: pretreatment systems, biological treatment systems, advanced treatment systems and sludge treatment systems.
Wherein: the advanced treatment system comprises a denitrification filter tank 7, a catalytic oxidation tank 8, a disinfection contact tank 9, an RO device 10, an RO water production tank 11 and an RO concentrated water tank 12; wherein RO means reverse osmosis.
The sludge discharge port of the pretreatment system and the residual sludge discharge port of the biological treatment system are connected to the sludge inlet of the sludge treatment system; a sludge filtrate outlet of the sludge treatment system is connected to a sludge filtrate return port of the pretreatment system;
the water outlet of the pretreatment system is connected to the water inlet of the biological treatment system; and the water outlet of the biological treatment system is respectively connected with the water inlet of the denitrification filter 7 and the water inlet of the RO device 10.
Wherein:
the denitrification filter 7 is provided with a water inlet, a water outlet, a concentrated water port and a carbon source feeding port; wherein, the carbon source added by the carbon source adding port can adopt methanol or sodium acetate.
The catalytic oxidation tank 8 is provided with a water inlet and a water outlet; the catalytic oxidation tank 8 can adopt an ozone oxidation tank or a Fenton oxidation tank.
The disinfection contact tank 9 is provided with a water inlet, a water outlet, a disinfectant feeding port and a fresh water inlet; the disinfectant added at the disinfectant adding port can adopt sodium hypochlorite, liquid chlorine and chlorine dioxide, and the effluent can be discharged to natural water or recycled.
The RO device 10 is provided with a water inlet, a concentrated water outlet and a fresh water outlet; the RO water producing tank 11 is provided with a water inlet and a water outlet; the RO concentrated water tank 12 is provided with a water inlet and a water outlet;
MBR means: membrane bioreactor (Membrane Bio-Reactor). A water outlet of the MBR membrane separation tank 6 is connected to a water inlet of the denitrification filter tank 7; the water outlet of the denitrification filter 7 is connected with the water inlet of the catalytic oxidation tank 8; the water outlet of the catalytic oxidation tank 8 is connected with the water inlet of the disinfection contact tank 9, and the denitrification filter tank 7, the catalytic oxidation tank 8 and the disinfection contact tank 9 form a summer operation unit;
the fresh water outlet of the RO device 10 is connected to the water inlet of the RO water producing tank 11; a blending pipeline is led out from the position of the water inlet of the RO device, and is connected to the water inlet of the disinfection contact tank 9 after being merged with the water outlet of the RO water producing tank 11; the concentrated water outlet of the RO device 10 is connected to the water inlet of the denitrification filter tank 7 after passing through the RO concentrated water tank 12; the RO device 10, the RO water producing tank 11, the RO thick water tank 12, the denitrification filter tank 7 and the disinfection contact tank 9 form a winter operation unit.
In summer, the water outlet of the MBR membrane separation tank 6 is connected to the water inlet of the denitrification filter tank 7, and the water inlet of the RO device 10 is closed; in winter, the water outlet of the MBR membrane separation tank 6 is connected to the water inlet of the RO device 10, and the water inlet of the denitrification filter tank 7 is closed.
The utility model discloses can ensure that sewage treatment plant goes out water quality of water homoenergetic and stably reaches Beijing standard A under the different operational aspect in summer and winter.
The pretreatment system, the biological treatment system, and the advanced treatment system are described in detail below:
(I) pretreatment system
The pretreatment system comprises a coarse grating unit 1, a fine grating unit 2, an aeration grit chamber 3 and a high-efficiency sedimentation tank 4 which are connected in series.
Wherein, the high-efficient sedimentation tank 4 is provided with a water inlet, a water outlet, an emergency medicament feeding port, a sludge discharge port and a sludge filtrate return port. The emergency medicament added through the emergency medicament adding port can be specifically selected according to the monitored water quality condition of the inlet water.
(II) biological treatment system
The biological treatment system comprises A connected in series 2 An O/AO tank 5 and an MBR membrane separation tank 6.
Wherein:
AO (anaerobic Oxic) process: also called Anaerobic-aerobic process, A (Anaerobic) is an Anaerobic section used for removing nitrogen and phosphorus; o (Oxic) is an aerobic section for removing organic matter from water
A 2 O, means Anaerobic-Anoxic-aerobic (Anaerobic-Oxic) process.
AO, meaning anaerobic aerobic (anaerobic Oxic) process. Wherein A (Anaerobic) is an Anaerobic section for denitrification and dephosphorization; o (Oxic) is an aerobic section for removing organic matter from water.
Wherein, as shown in FIG. 2, A 2 The O/AO pool 5 comprises an anaerobic zone 16, an anoxic zone 17, an aerobic zone 18, a forced denitrification zone 19 and a forced nitrification zone 20; wherein, the anaerobic zone (A zone), the anoxic zone (A zone), the aerobic zone (O zone), the forced denitrification zone (A zone) and the forced nitrification zone (O zone).
The anaerobic zone 16, the anoxic zone 17, the aerobic zone 18, the forced denitrification zone 19 and the forced nitrification zone 20 are connected in series and then are connected with the MBR membrane separation tank 6;
the anaerobic zone 16 is provided with a water inlet, a water outlet and a sludge backflow inlet; the anoxic zone 17 is provided with a water inlet, a water outlet, a sludge backflow outlet and a mixed liquid backflow inlet; the aerobic zone 18 is provided with a water inlet, a water outlet, a mixed liquid backflow outlet and a sludge backflow inlet; the forced denitrification area 19 is provided with a water inlet and a water outlet; the forced nitrification area 20 is provided with a water inlet and a water outlet; the MBR membrane separation tank 6 is provided with a water inlet, a water outlet, a sludge backflow outlet, an excess sludge discharge port and a PAC dosing port;
the water outlet of the high-efficiency sedimentation tank 4 is connected to the water inlet of the anaerobic zone 16, the sludge backflow outlet of the anoxic zone 17 is connected to the sludge backflow inlet of the anaerobic zone 16, the mixed liquid backflow outlet of the aerobic zone 18 is connected to the mixed liquid backflow inlet of the anoxic zone 17, and the sludge backflow outlet of the MBR membrane separation tank 6 is connected to the sludge backflow inlet of the aerobic zone 18.
(III) sludge treatment system
The sludge treatment system comprises a sludge concentration tank 13, a sludge dewatering device 14 and a sludge filtrate dephosphorization tank 15;
wherein:
the sludge concentration tank 13 is provided with a sludge inlet, a sludge outlet and a supernatant outlet; the sludge dewatering device 14 can adopt a plate-and-frame filter press, a centrifugal dehydrator or a stacked screw dehydrator, and the treated sludge can be used as a landfill or landscaping fertilizer.
The sludge dewatering device 14 is provided with a sludge inlet, a sludge outlet, a PAC and PAM dosing port and a filtrate outlet; the sludge filtrate dephosphorization tank 15 is provided with a filtrate inlet, a filtrate outlet and a PAC dosing port; wherein: PAC is polyaluminium chloride and PAM is polyacrylamide.
A sludge discharge port of the high-efficiency sedimentation tank 4 and a residual sludge discharge port of the MBR membrane separation tank 6 are connected to a sludge inlet of a sludge concentration tank 13; the sludge outlet of the sludge concentration tank 13 is connected to the sludge inlet of the sludge dewatering device 14;
a supernatant outlet of the sludge concentration tank 13 and a filtrate outlet of the sludge dewatering device 14 are connected to a filtrate inlet of the sludge filtrate dephosphorization tank 15, and a filtrate outlet of the sludge filtrate dephosphorization tank 15 is connected to a sludge filtrate return port of the efficient sedimentation tank 4.
Wherein the sludge dewatering device 14 is a plate-and-frame filter press, a centrifugal dehydrator or a stacked screw dehydrator.
In order to facilitate the understanding of the present invention, the following description is further provided with reference to the accompanying drawings and specific embodiments:
(1) The sewage firstly enters a pretreatment system, larger suspended matters are removed through a coarse grating unit 1, and then the sewage enters a fine grating unit 2, and smaller solid impurities in the water are removed, so that a subsequent system is protected.
The sewage passing through the fine grid unit 2 flows into the aeration grit chamber 3 to remove sand grains in the sewage, reduce the abrasion to equipment and pipelines in the next procedure and remove organic matters attached to the surface of the sand.
The effluent of the aeration grit chamber 3 enters the high-efficiency sedimentation tank 4, so that suspended matters in water can be removed, and meanwhile, when emergency situations such as heavy metal ions entering a system occur, emergency agents can be added for treatment, so that impact on subsequent treatment processes is prevented, and the effluent of the high-efficiency sedimentation tank 4 enters the biological treatment system.
(2) The sewage treated by the pretreatment system firstly enters an anaerobic zone 16, wherein the biodegradability of the sewage can be improved in the zone, and phosphorus can be released;
the effluent from the anaerobic zone 16 enters an anoxic zone 17 where denitrification can take place, where total nitrogen will be removed;
the effluent of the anoxic zone 17 enters the aerobic zone 18 for aerobic oxidation reaction and nitrification reaction, and in order to ensure higher denitrification efficiency, a forced denitrification zone 19 and a forced nitrification zone 20 are arranged behind the aerobic zone 18, so that the anoxic time of the sewage can be prolonged, and the denitrification reaction rate and effect can be improved.
The effluent of the forced nitrification zone 20 enters the MBR membrane separation tank 6, organic matters in the water can be removed, ammonia nitrogen can be effectively removed, phosphorus is absorbed in the zone, the effect of biological phosphorus removal can be achieved through sludge discharge, and meanwhile, PAC is added into the MBR membrane separation tank 6 through a medicine adding port, so that the effect of chemical phosphorus removal can be achieved.
A part of return sludge generated by the MBR membrane separation tank 6 returns to the aerobic zone 18 through a sludge return outlet and can be used for maintaining A 2 The biomass of the whole O/AO pool 5 is fully utilized, meanwhile, the dissolved oxygen of the MBR membrane separation pool 6 is fully utilized, a part of mixed liquor in the aerobic zone 18 flows back to the anoxic zone 17 through a mixed liquor backflow outlet for nitrifying liquor backflow denitrification, and a part of backflow sludge in the anoxic zone 17 flows back to the anaerobic zone 16 at the front end through a sludge backflow outlet, so that the optimal condition is provided for sludge phosphorus release.
(3) The deep treatment system is divided into a summer treatment unit and a winter treatment unit:
in summer, the effluent of the MBR membrane separation tank 6 enters a denitrification filter tank 7, and enhanced biological denitrification is carried out under the condition of an external carbon source, so that the total nitrogen of the effluent reaches the standard;
the effluent treated by the denitrification filter 7 enters a catalytic oxidation tank 8 to oxidize refractory organic matters in the sewage into easily degradable micromolecule substances, so that the tail water is guaranteed to reach the standard.
The effluent of the catalytic oxidation tank 8 enters a contact disinfection tank 9, and is sterilized and discharged or recycled after reaching the standard after being added with a disinfectant;
in winter, a part of the effluent of the MBR membrane separation tank 6 is connected to the RO device 10, so that nitrate and nitrite ions can be intercepted, and the purpose of removing total nitrogen is achieved;
fresh water generated by the RO device 10 enters the RO water producing tank 11 through a fresh water port, effluent of the RO water producing tank 11 enters the contact disinfection tank 9 for disinfection, concentrated water generated by the RO device 10 enters the RO concentrated water tank 12 through a concentrated water port, and in order to avoid bringing total nitrogen in the concentrated water into the system again, effluent of the RO concentrated water tank 12 enters the denitrification filter tank 7 for removing the total nitrogen.
The other part of the effluent of the MBR membrane separation tank 6 directly enters the disinfection contact tank 9 without passing through the RO device 10 to be blended and mixed with the effluent of the RO water production tank 11, and the operation cost can be reduced on the premise of ensuring that various pollution factors in the effluent meet the effluent quality index requirements.
(4) Sludge produced by the high-efficiency sedimentation tank 4 and excess sludge produced by the MBR membrane separation tank 6 are discharged to a sludge concentration tank 13 for concentration, the concentrated sludge enters a sludge dewatering device 14, PAC and PAM are added through a drug adding port to improve the dewatering performance of the sludge, and the sludge is transported outside after being dewatered by the sludge dewatering device 14.
Supernatant of the sludge concentration tank 13 and pressure filtrate of the sludge dewatering device 14 enter a sludge filtrate dephosphorization tank 15 in a unified mode, PAC is added into the tank through a medicament adding port for chemical dephosphorization, sludge filtrate is prevented from directly flowing back to a sewage treatment system to bring phosphorus into the system again, and treated sludge filtrate enters the efficient sedimentation tank 4 through a sludge filtrate return port.
It should be noted that the utility model provides a sewage treatment system, including but not limited to thick grid unit 1, thin grid unit 2, aeration grit chamber 3 and high-efficient sedimentation tank 4, A 2 O/AO pond 5, MBR membrane separation pond 6, denitrification filtering pond 7, catalytic oxidation pond 8, disinfection contact tank 9, RO device 10, RO produce pond 11, the thick pond 12 of RO etc. each part structure of self is the prior art in water treatment field, the utility model discloses no longer describe herein the concrete structure of each component part of processing system, and ordinary technical personnel in the field can be according to the utility model discloses the concrete structure of above-mentioned each part is realized to technical scheme's record. The utility model discloses an innovation point does: the integration of each sewage treatment structure forms a sewage treatment system, and each sewage treatment structure is mutually matched, so that the aim of improving the sewage treatment effect is fulfilled.
The utility model provides a sewage treatment system has following advantage:
1. the two technological operation routes of winter and summer are adopted according to different water temperatures in seasons, the water temperature in summer is higher, and the biological denitrification effect is better, so that the denitrification deep bed filter is adopted for carrying out biological enhanced denitrification in summer; the water temperature is lower in winter, the nitrification rate is reduced, the biological denitrification technology is greatly influenced, the RO device is started in winter, the membrane separation technology of RO is utilized for denitrification, and TN and NH in the effluent can be ensured 3 and-N can meet the requirement of effluent quality index all the year around.
2. Multiple combined process for removing TN and NH 3 And N, ensuring that the quality of the effluent reaches the standard. A. The 2 The O process can be synchronizedDenitrification and dephosphorization in 2 The A/O process is arranged after the O process, so that the retention time of the anoxic tank can be prolonged, and the denitrification reaction rate and effect are improved; due to the high-efficiency sludge-water separation capacity of the MBR process, ammonia nitrogen can be effectively removed; and arranging a denitrification filter tank and an RO device after the MBR process to further remove TN.
3. And a mode of combining biological phosphorus removal and chemical phosphorus removal is adopted, so that the effluent TP is ensured to stably reach the standard. A. The 2 The O/AO process can utilize the activity of microorganisms to carry out biological phosphorus removal; adding PAC (polyaluminium chloride) agent into the MBR tank for chemical reaction, then removing phosphorus, and removing phosphorus through solid-liquid separation; a sludge filtrate dephosphorization pool is arranged in a sludge treatment system, PAC is added into the pool for chemical dephosphorization, and the sludge filtrate is prevented from directly flowing back to a sewage treatment system to bring phosphorus into the system again.
4. In order to prevent the industrial wastewater from impacting the treatment process, corresponding technical measures are taken. A drug adding port of an emergency drug is arranged in the high-efficiency sedimentation tank, and when emergency situations such as heavy metal ions entering a system occur, the emergency drug can be added for treatment; in order to ensure that the content of organic matters in the effluent meets the effluent quality requirement, a catalytic oxidation tank is arranged at the tail end of the process flow, organic matters which are difficult to degrade can be removed, and the effluent quality is ensured.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (5)
1. A wastewater treatment system, comprising: the system comprises a pretreatment system, a biological treatment system, an advanced treatment system and a sludge treatment system;
wherein: the advanced treatment system comprises a denitrification filter tank, a catalytic oxidation tank, a disinfection contact tank, an RO device, an RO water production tank and an RO concentrated water tank;
the sludge discharge port of the pretreatment system and the residual sludge discharge port of the biological treatment system are jointly connected to the sludge inlet of the sludge treatment system; a sludge filtrate outlet of the sludge treatment system is connected to a sludge filtrate return port of the pretreatment system;
the water outlet of the pretreatment system is connected to the water inlet of the biological treatment system; the water outlet of the biological treatment system is respectively connected with the water inlet of the denitrification filter and the water inlet of the RO device;
the water outlet of the denitrification filter tank is connected with the water inlet of the catalytic oxidation tank; the water outlet of the catalytic oxidation tank is connected with the water inlet of the disinfection contact tank, and the denitrification filter tank, the catalytic oxidation tank and the disinfection contact tank form a summer operation unit;
the fresh water outlet of the RO device is connected to the water inlet of the RO water producing tank; a blending pipeline is led out from the position of the water inlet of the RO device, and is connected to the water inlet of the disinfection contact tank after being merged with the water outlet of the RO water generating tank; the concentrated water outlet of the RO device is connected to the water inlet of the denitrification filter tank after passing through the RO concentrated water tank; the RO device, the RO water producing tank, the RO concentrated water tank, the denitrification filter tank and the disinfection contact tank form a winter operation unit;
the pretreatment system comprises a coarse grating unit, a fine grating unit, an aeration grit chamber and a high-efficiency sedimentation tank which are connected in series;
wherein the biological treatment system comprises A connected in series 2 An O/AO pool and an MBR membrane separation pool;
wherein, A is 2 The O/AO pool comprises an anaerobic zone, an anoxic zone, an aerobic zone, a forced denitrification zone and a forced nitrification zone;
the anaerobic zone, the anoxic zone, the aerobic zone, the forced denitrification zone and the forced nitrification zone are connected in series and then are connected with the MBR membrane separation tank;
in addition, a sludge return outlet of the MBR membrane separation tank is connected to a sludge return inlet of the aerobic zone; a mixed liquid reflux outlet of the aerobic zone is connected to a mixed liquid reflux inlet of the anoxic zone; a sludge return outlet of the anoxic zone is connected to a sludge return inlet of the anaerobic zone;
the sludge treatment system comprises a sludge concentration tank, a sludge dewatering device and a sludge filtrate dephosphorization tank;
the sludge discharge port of the high-efficiency sedimentation tank and the residual sludge discharge port of the MBR membrane separation tank are connected to the sludge inlet of the sludge concentration tank; a sludge outlet of the sludge concentration tank is connected to a sludge inlet of the sludge dewatering device;
and a supernatant outlet of the sludge concentration tank and a filtrate outlet of the sludge dewatering device are connected to a filtrate inlet of the sludge filtrate dephosphorization tank, and a filtrate outlet of the sludge filtrate dephosphorization tank is connected to a sludge filtrate return port of the high-efficiency sedimentation tank.
2. The sewage treatment system of claim 1, wherein the denitrification filter is provided with a carbon source feeding port.
3. The wastewater treatment system of claim 1, wherein the catalytic oxidation tank is an ozone oxidation tank or a Fenton oxidation tank.
4. The wastewater treatment system of claim 1, wherein the disinfection contact tank is provided with a disinfectant dosing port.
5. The wastewater treatment system of claim 1, wherein the sludge dewatering device is a plate-and-frame filter press, a centrifugal dehydrator, or a stacked screw dehydrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221882477.3U CN218709704U (en) | 2022-07-20 | 2022-07-20 | Sewage treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221882477.3U CN218709704U (en) | 2022-07-20 | 2022-07-20 | Sewage treatment system |
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| Publication Number | Publication Date |
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| CN218709704U true CN218709704U (en) | 2023-03-24 |
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| CN202221882477.3U Active CN218709704U (en) | 2022-07-20 | 2022-07-20 | Sewage treatment system |
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2022
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