CN116730500A - Domestic sewage treatment process and treatment equipment thereof - Google Patents
Domestic sewage treatment process and treatment equipment thereof Download PDFInfo
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- CN116730500A CN116730500A CN202310730270.7A CN202310730270A CN116730500A CN 116730500 A CN116730500 A CN 116730500A CN 202310730270 A CN202310730270 A CN 202310730270A CN 116730500 A CN116730500 A CN 116730500A
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- 239000010865 sewage Substances 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000010802 sludge Substances 0.000 claims abstract description 89
- 239000012528 membrane Substances 0.000 claims abstract description 72
- 238000010992 reflux Methods 0.000 claims abstract description 52
- 238000000926 separation method Methods 0.000 claims abstract description 23
- 238000005374 membrane filtration Methods 0.000 claims abstract description 17
- 239000000945 filler Substances 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 108
- 238000007790 scraping Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 7
- 125000004122 cyclic group Chemical group 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000813 microbial effect Effects 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 3
- 238000007654 immersion Methods 0.000 description 16
- 238000005345 coagulation Methods 0.000 description 9
- 230000015271 coagulation Effects 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 241000883990 Flabellum Species 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/08—Aerobic processes using moving contact bodies
- C02F3/082—Rotating biological contactors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a domestic sewage treatment process and treatment equipment thereof, wherein the treatment process comprises the following steps: s1, primarily removing impurities; s2, performing primary deep treatment; s3, secondary deep treatment; s4, circularly processing; s5, membrane separation treatment. The treatment equipment comprises a grid pond, an advanced treatment pond positioned at the rear side of the grid pond, anaerobic ponds positioned at the left side and the right side of the advanced treatment pond, wherein one side, far away from the advanced treatment pond, of the two anaerobic ponds is sequentially provided with an aerobic pond and a membrane filtration pond side by side, and the middle part of the advanced treatment pond is provided with a driving component. The invention is composed of an elastic filler rotary disc, an anaerobic biological rotary disc, an aerobic biological rotary disc and an MBR membraneMultistage treatment mode, can be used for TN, NH in domestic sewage 4 ‑ N, COD and the like have good treatment effects, the water purification rate is improved by setting reasonable sewage and sludge reflux quantity, and meanwhile, the activated sludge carrying the microbial community can be reused by using the reflux sludge, so that the method has higher help to the treatment of domestic sewage in rural areas and cities.
Description
Technical Field
The invention relates to the technical field of domestic sewage treatment, in particular to a domestic sewage treatment process and treatment equipment thereof.
Background
Domestic sewage is a common name for urban or rural domestic water discharged into a sewage system, and is generally collected by a drainage pipe network and conveyed to a sewage treatment plant for unified treatment. The domestic sewage contains a large amount of COD, BOD5 and NO 3 - N, animal and vegetable oils, ammonia, hair, etc., and therefore need to be treated by various means in combination.
In the existing domestic sewage treatment method, the physical treatment method is to remove solid pollutants in suspension state in water by using a screening method, a precipitation method, a filtering method, an air floatation method, an upward floatation method and a reverse osmosis method; the chemical treatment method is to separate and recycle pollutants in various forms in the sewage by using methods such as neutralization, coagulation, electrolysis, oxidation reduction, steam extraction, adsorption, ion exchange, electroanalysis and the like; the biochemical treatment method utilizes the metabolism of microbe to make the organic pollutant in colloid form be converted into stable harmless matter.
Patent CN209872671U discloses a domestic sewage treatment container, and this container includes the box and sets up domestic sewage treatment system in the box, domestic sewage treatment system is including equalizing basin, the magnetic coagulation pretreatment pond, anoxic reaction pond, the MBR biology of intercommunication in proper orderA membrane reaction tank, a magnetic coagulation advanced treatment tank and a disinfection tank; the magnetic coagulation pretreatment tank comprises a first magnetic coagulation tank, a first flocculation tank and a first sedimentation tank which are sequentially communicated; the magnetic coagulation advanced treatment tank comprises a second magnetic coagulation tank, a second flocculation tank and a second sedimentation tank which are sequentially communicated. The domestic sewage treatment system adopting the connection mode of the magnetic coagulation pretreatment tank, the anoxic reaction tank, the MBR membrane biological reaction tank and the magnetic coagulation advanced treatment tank remarkably improves the effluent quality, and the sewage treatment system is compactly arranged in a container to form integrated sewage treatment equipment, thereby improving the sewage treatment effect and reducing the occupied area of the equipment. However, the units are not closely connected, the strengthening of the nitrification and denitrification unit is lacking, and the method aims at high TN and NH content 4 - The sewage treatment effect of-N is relatively limited.
Disclosure of Invention
Aiming at the problems, the invention provides a domestic sewage treatment process and treatment equipment thereof.
The technical scheme of the invention is as follows:
a domestic sewage treatment process comprises the following steps:
s1, preliminary impurity removal: injecting domestic sewage into a grid pool, filtering the domestic sewage by a grid net in the grid pool, and pumping the domestic sewage into an advanced treatment pool through a lift pump;
s2, primary deep treatment: the domestic sewage subjected to preliminary impurity removal is pressurized by a lifting pump and then is subjected to impact driving on a driving assembly in the advanced treatment tank, elastic filler filled on the driving assembly is used for carrying out primary degradation on the domestic sewage, and then the domestic sewage overflows into anaerobic tanks positioned at two sides of the advanced treatment tank;
s3, secondary advanced treatment: the domestic sewage is subjected to anaerobic biological treatment in an anaerobic tank through an anaerobic biological rotating disc, and the domestic sewage subjected to anaerobic biological treatment overflows into an aerobic tank and is subjected to aerobic biological treatment through an aerobic biological rotating disc;
s4, cyclic treatment: reflux one part of the domestic sewage after aerobic biological treatment to the advanced treatment tank for advanced treatment again, and the rest part enters the membrane filtration tank;
s5, membrane separation treatment: and (3) carrying out membrane separation treatment on domestic sewage through an MBR membrane in a membrane filter tank, refluxing part of sludge obtained by the membrane separation treatment to an anaerobic tank, adding a methanol solution into the anaerobic tank, collecting and discharging residual sludge, and collecting and discharging the domestic sewage after the membrane separation treatment.
Further, in the step S4, 30-40% of the total amount of the domestic sewage subjected to the aerobic biological treatment is returned to the advanced treatment tank.
Description: the domestic sewage after being treated by the reflux part of the aerobic biological rotating disc can improve the purification rate of the domestic sewage, and meanwhile, the reflux water can promote the help driving assembly to rotate, so that the working efficiency is improved.
Further, in the step S5, 20-30% of the total amount of the sludge obtained by the membrane separation treatment is returned to the anaerobic tank, the weight ratio of the added methanol solution to the returned sludge is 1:5-10, and the mass concentration of the methanol solution is 60-80%.
Description: the activated sludge carrying the microbial community can be recycled through refluxing a part of sludge, simultaneously denitrification is carried out by matching with the additional carbon source methanol, and meanwhile, the rotation of the driving assembly can be promoted by utilizing the mixture of the sludge and the methanol, so that the working efficiency is improved.
Further, the immersion height of the domestic sewage in the deep treatment tank is 35-40%, the immersion height in the anaerobic tank is 30-35%, the immersion height in the aerobic tank is 40-45%, and the immersion height in the membrane treatment tank is 60-65%.
Description: through optimizing and adjusting the liquid level height in each pool, the optimal water resistance in each pool is ensured, and meanwhile, the ideal rotating speed of the turntable is realized.
The treatment equipment for the domestic sewage treatment process comprises a grid pool, an advanced treatment pool, anaerobic pools, an aerobic pool and a membrane filter pool, wherein the advanced treatment pool is positioned at the rear side of the grid pool, the anaerobic pools are positioned at the left side and the right side of the advanced treatment pool, one side, far away from the advanced treatment pool, of each anaerobic pool is sequentially provided with the aerobic pool and the membrane filter pool side by side, and the middle part of the advanced treatment pool is provided with a driving component;
the driving assembly comprises a rotating shaft, two ends of the rotating shaft sequentially penetrate through the anaerobic tank and the aerobic tank and extend into the membrane filtering tank, a plurality of connecting rods are arranged in the middle of the rotating shaft, a baffle is arranged at the tail end of each connecting rod, a lifting pump is arranged at the upper part of the inner wall of the front side of the deep treatment tank, the lower output end of the lifting pump corresponds to each baffle and is used for carrying out impact driving on the driving assembly, a plurality of elastic filler discs are symmetrically arranged on the rotating shaft at two sides of each connecting rod, and the deep treatment tank and the anaerobic tank are communicated through first overflow holes positioned on the side walls of the two;
the rotating shaft is provided with a first gear at the middle part inside the anaerobic tank, a second gear is arranged below the first gear in a meshed connection manner, the middle part of the second gear is provided with a connecting shaft, two ends of the connecting shaft are rotationally connected with the inner wall of the anaerobic tank, a plurality of anaerobic biological turntables are symmetrically arranged on the connecting shaft at two sides of the second gear, a first reflux pump is arranged at the top of the anaerobic tank, and the anaerobic tank is communicated with the aerobic tank through a second overflow hole positioned on the side wall of the anaerobic tank and the aerobic tank;
the pivot is being located the inside one section of good oxygen pond is equipped with a plurality of good oxygen carousel, and the both ends of pivot are equipped with the flabellum, and the flabellum is located middle part in the membrane filtration pond, the inside two MBR membrane modules that are equipped with of membrane filtration pond, the pivot runs through and is close to good oxygen pond one side MBR membrane module, the flabellum is located between two MBR membrane modules, communicates through the third overflow aperture that is located on both lateral walls between good oxygen pond and the membrane filtration pond, and membrane filtration pond, good oxygen pond and anaerobic pond rear side are equipped with the backward flow pond.
Description: the rotating pressure of the rotating shaft can be reduced through the symmetrical arrangement mode, so that the power provided by jet impact can meet the rotation of the whole driving assembly, an additional motor is not required, the economic benefit is high, and the management is convenient.
Further, the rotating shaft is in rotary and sealing limiting connection with the side walls of the anaerobic tank, the aerobic tank and the membrane filter tank.
Description: the whole stability of the device is improved through the rotation limiting sealing connection of the rotating shaft and each pool.
Still further, the baffle is equipped with at the backward flow pond middle part, the baffle front side is backward flow effluent water sump, and the baffle rear side is backward flow sludge impoundment, backward flow effluent water sump lateral wall upper portion corresponds the good oxygen pond is equipped with fourth overflow hole, corresponds between two backward flow effluent water sumps the deep processing pond rear side is equipped with the second backward flow pump, the second backward flow pump passes through second back flow pipe and backward flow effluent water sump bottom intercommunication, be equipped with the ascending and each of opening behind the backward side wall of second backward flow pump the jet pipe that corresponds of baffle for carry out supplementary impact drive to drive assembly.
Description: the arrangement of the backflow pool can meet the backflow conditions of the treated sewage and sludge, and meanwhile, the auxiliary impact driving of the driving assembly is completed when the sewage is backflow.
Preferably, the bottom of the membrane filter tank is provided with a sludge pump, the sludge pump is communicated with one side of the backflow sludge tank through a sludge pipe, the backflow sludge tank extends to the middle part of the backflow sludge tank, the first backflow pump is communicated with the inside of the backflow sludge tank through a first backflow pipe, the top of the partition plate is slidably connected with a driving block, the driving block is driven by pushing a driving motor positioned on the upper part of the side wall of the backflow tank, the rear side of the driving block is provided with a first telescopic rod, the tail end of the first telescopic rod is provided with a second telescopic rod facing the inside of the sludge tank, the tail end of the second telescopic rod is provided with a scraper, the rear side wall and the bottom of the backflow sludge tank, which are close to one end of the first backflow pipe, are respectively provided with an arc-shaped first limiting block for pushing the scraper to move obliquely upwards, inside being close to of backward flow sludge impoundment driving motor one end lateral wall and bottom all are equipped with curved second stopper for promote the mud scraping plate and move to oblique below, backward flow sludge impoundment rear side is equipped with the methyl alcohol pond, be equipped with the fluting between methyl alcohol pond and the backward flow sludge impoundment, the inside sliding connection of fluting is equipped with the slider, the slider is located first stopper top, slider one end is equipped with and is used for the dog with mud scraping plate butt joint, and the slider other end passes through the spring and is connected with backward flow sludge impoundment inner wall, is equipped with the through-hole that is used for water conservancy diversion methyl alcohol pond inside liquid in the fluting of slider back, works as the slider stops when the spring is in the natural elongation state the through-hole, the baffle top is equipped with the slide rail, the slide rail is equipped with spout sliding connection of driving piece bottom.
Description: the device can assist in scraping and promoting discharge of return sludge through the arrangement of the driving block, and meanwhile can realize intermittent methanol release by matching with the methanol tank, so that the proportioning requirement is met, the degree of automation is improved, and the working efficiency is improved.
Preferably, one side of the center of the bottom of the advanced treatment tank is provided with a limiting lug, the bottom in the baffle is provided with a spring shaft connected with the connecting rod, the baffle is blocked by the limiting lug and rotates to be parallel to the state of the limiting lug through the spring shaft when rotating to the position of the limiting lug, the tail end of the inner part of the anaerobic tank is provided with a plurality of auxiliary baffle plates at equal intervals in the circumferential direction of the lower part of the first reflux pump, and the auxiliary baffle plates and the output end of the lower part of the first reflux pump are correspondingly used for carrying out auxiliary impact driving on the driving assembly.
Description: the baffle can be changed into vertical arrangement when entering water through the arrangement of the limiting convex blocks, so that water flow resistance is further reduced, auxiliary impact driving of the driving assembly is completed when sludge is returned through the arrangement of the auxiliary baffle, and the rotation pressure of the driving assembly is reduced through cooperation, so that stable operation of the whole equipment is realized.
The beneficial effects of the invention are as follows:
(1) The domestic sewage treatment process can treat TN and NH in domestic sewage by a multistage treatment mode consisting of the elastic filler rotary disc, the anaerobic and aerobic biological rotary discs and the MBR membrane 4 - N, COD and the like have good treatment effects, the water purification rate is improved by setting reasonable sewage and sludge reflux quantity, meanwhile, the activated sludge carrying a microbial community can be recycled by using the reflux sludge, and meanwhile, the denitrification is carried out by matching with the additional carbon source methanol, so that the degradable organic matters in the sewage are fully utilized, the methanol consumption is saved, and the method has higher help to the domestic sewage treatment in rural areas and cities.
(2) According to the domestic sewage treatment process, the optimal water resistance in each pool is guaranteed and the ideal rotating speed of the rotating disc is realized through optimally adjusting the liquid level height in each pool.
(3) According to the domestic sewage treatment equipment, the rotation pressure of the rotating shaft can be reduced by arranging the driving components symmetrically, so that the power provided by jet impact can meet the rotation of the whole driving component, an additional motor is not required to be arranged, the economic benefit is high, the management is convenient, the reflux conditions of treated sewage and sludge can be met by arranging the reflux tank, and meanwhile, the auxiliary impact driving of the driving components is finished while the sewage is refluxed.
(4) According to the domestic sewage treatment equipment, the arrangement of the driving block can assist in completing scraping and discharging of the return sludge, and meanwhile, the intermittent methanol release can be realized by matching with the methanol tank, so that the proportioning requirement is met, the degree of automation is improved, and the working efficiency is improved; the baffle can be changed into vertical arrangement when entering water through the arrangement of the limiting convex blocks, so that water flow resistance is further reduced, auxiliary impact driving of the driving assembly is completed when sludge is returned through the arrangement of the auxiliary baffle, and the rotation pressure of the driving assembly is reduced through cooperation, so that stable operation of the whole equipment is realized.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a domestic sewage treatment apparatus of the present invention;
FIG. 2 is a schematic view showing the overall internal structure of the domestic sewage treatment apparatus of the present invention, with the anaerobic tank top cover omitted;
FIG. 3 is a schematic diagram of the internal structure of an anaerobic tank of the domestic sewage treatment device of the present invention;
FIG. 4 is a schematic diagram of a connection structure between a driving block and a mud scraping plate in a reflux tank of domestic sewage treatment equipment;
FIG. 5 is a schematic diagram of the position structure of a first limiting block in a reflux tank of domestic sewage treatment equipment;
FIG. 6 is a top view of the internal structure of a reflux tank of the domestic sewage treatment equipment and a schematic diagram of the structure of the joint of the reflux sludge tank and the methanol tank;
FIG. 7 is a schematic view showing the bottom structure of the bottom driving assembly in the advanced treatment tank of the domestic sewage treatment apparatus according to the present invention;
FIG. 8 is a schematic view of the structure of a spring shaft at the joint of a connecting rod and a baffle plate of the domestic sewage treatment equipment.
The device comprises a 1-grille pool, a 2-advanced treatment pool, a 21-lifting pump, a 22-elastic filler disc, a 23-second reflux pump, a 24-second reflux pipe, a 25-jet pipe, a 26-limit bump, a 3-anaerobic pool, a 31-first overflow hole, a 32-anaerobic biological rotating disc, a 33-first reflux pump, a 34-first reflux pipe, a 4-aerobic pool, a 41-second overflow hole, a 42-aerobic biological rotating disc, a 5-membrane filter pool, a 51-third overflow hole, a 52-MBR membrane component, a 53-sludge pump, a 54-sludge pipe, a 6-driving component, a 61-rotating shaft, a 62-connecting rod, a 63-baffle plate, a 64-first gear, a 65-second gear, a 66-connecting shaft, a 67-fan blade, a 68-spring shaft, a 69-auxiliary baffle plate, a 7-reflux pool, a 71-baffle plate, a 72-reflux pool, a 73-reflux sludge pool, a 74-fourth overflow hole, a 75-first limiting block, a 76-second limiting block, a 77-slotted, a 78-slide rail, an 8-motor driving block, a 81-motor driving block, a 82-first telescopic rod, a 82-83-telescopic rod, a 92-telescopic rod, a 9-telescopic rod, a 93-telescopic rod, a 9-telescopic rod and a 9-telescopic rod.
Detailed Description
Example 1
A domestic sewage treatment process comprises the following steps:
s1, preliminary impurity removal: injecting domestic sewage into the grid pond 1, filtering by a grid net in the grid pond 1, and pumping the domestic sewage into the advanced treatment pond 2 through the lifting pump 21;
s2, primary deep treatment: the domestic sewage subjected to preliminary impurity removal is pressurized by a lifting pump 21 and then is subjected to impact driving on a driving assembly 6 in the advanced treatment tank 2, elastic filler filled on the driving assembly 6 is used for carrying out primary degradation on the domestic sewage, and then the domestic sewage overflows into anaerobic tanks 3 positioned on two sides of the advanced treatment tank 2;
s3, secondary advanced treatment: the domestic sewage is subjected to anaerobic biological treatment in the anaerobic tank 3 through the anaerobic biological rotating disc 32, and the domestic sewage subjected to anaerobic biological treatment overflows into the aerobic tank 4 and is subjected to aerobic biological treatment through the aerobic biological rotating disc 42;
s4, cyclic treatment: reflux 35% of the domestic sewage subjected to aerobic biological treatment to the advanced treatment tank 2 for further advanced treatment and secondary advanced treatment, and allowing the rest part to enter the membrane filtration tank 5;
s5, membrane separation treatment: carrying out membrane separation treatment on domestic sewage through an MBR (membrane biological reactor) membrane in a membrane filter tank 5, refluxing 25% of sludge obtained through the membrane separation treatment to an anaerobic tank 3, simultaneously adding a methanol solution into the anaerobic tank 3, wherein the weight ratio of the added methanol solution to the refluxed sludge is 1:7, the mass concentration of the methanol solution is 70%, and collecting and discharging residual sludge and collecting and discharging the domestic sewage obtained through the membrane separation treatment;
the immersion height of domestic sewage in the deep treatment tank 2 is 38%, the immersion height in the anaerobic tank 3 is 32%, the immersion height in the aerobic tank 4 is 43%, and the immersion height in the membrane treatment tank is 62%.
Example 2
This embodiment differs from embodiment 1 in that: the specific parameter settings are different.
S4, cyclic treatment: reflux 30-40% of the domestic sewage treated by the aerobic organisms to the advanced treatment tank 2 for the first-stage advanced treatment and the second-stage advanced treatment again, and the rest enters the membrane filtration tank 5;
s5, membrane separation treatment: carrying out membrane separation treatment on domestic sewage through an MBR (membrane biological reactor) membrane in a membrane filter tank 5, refluxing 20% of sludge obtained through the membrane separation treatment to an anaerobic tank 3, simultaneously adding a methanol solution into the anaerobic tank 3, wherein the weight ratio of the added methanol solution to the refluxed sludge is 1:5, the mass concentration of the methanol solution is 60%, and collecting and discharging residual sludge and collecting and discharging the domestic sewage obtained through the membrane separation treatment;
the immersion height of domestic sewage in the deep treatment tank 2 is 35%, the immersion height in the anaerobic tank 3 is 30%, the immersion height in the aerobic tank 4 is 40%, and the immersion height in the membrane treatment tank is 60%.
Example 3
This embodiment differs from embodiment 1 in that: the specific parameter settings are different.
S4, cyclic treatment: reflux 40% of the domestic sewage subjected to aerobic biological treatment to the advanced treatment tank 2 for carrying out the first-stage advanced treatment and the second-stage advanced treatment again, and allowing the rest part to enter the membrane filtration tank 5;
s5, membrane separation treatment: performing membrane separation treatment on domestic sewage through an MBR (membrane biological reactor) membrane in a membrane filter tank 5, refluxing 30% of sludge obtained by the membrane separation treatment to an anaerobic tank 3, simultaneously adding a methanol solution into the anaerobic tank 3, wherein the weight ratio of the added methanol solution to the refluxed sludge is 1:10, the mass concentration of the methanol solution is 80%, collecting and discharging residual sludge, and collecting and discharging the domestic sewage obtained by the membrane separation treatment;
the immersion height of domestic sewage in the deep treatment tank 2 is 40%, the immersion height in the anaerobic tank 3 is 35%, the immersion height in the aerobic tank 4 is 45%, and the immersion height in the membrane treatment tank is 65%.
Example 4
As shown in fig. 1, the present embodiment is a treatment device for a domestic sewage treatment process in embodiment 1, which includes a grid tank 1, a deep treatment tank 2 located at the rear side of the grid tank 1, anaerobic tanks 3 located at the left and right sides of the deep treatment tank 2, an aerobic tank 4 and a membrane filtration tank 5 sequentially arranged side by side on one side of the two anaerobic tanks 3 far from the deep treatment tank 2, and a driving component 6 arranged in the middle of the deep treatment tank 2;
as shown in fig. 2, the driving assembly 6 comprises a rotating shaft 61 with two ends penetrating through the anaerobic tank 3 and the aerobic tank 4 in sequence and extending into the membrane filtration tank 5, the rotating shaft 61 and the side walls of the anaerobic tank 3, the aerobic tank 4 and the membrane filtration tank 5 are respectively connected with the rotating grooves arranged in the side walls of the anaerobic tank 3, the aerobic tank 4 and the membrane filtration tank 5 in a rotating and sealing limit manner through protruding rotating rings, 6 connecting rods 62 are arranged in the middle of the rotating shaft 61, one baffle 63 is arranged at the tail end of each connecting rod 62, a lifting pump 21 is arranged at the upper part of the inner wall of the front side of the deep treatment tank 2, the lower output end of the lifting pump 21 corresponds to each baffle 63 and is used for performing impact driving on the driving assembly 6, 8 elastic filler discs 22 are symmetrically arranged on the rotating shafts 61 positioned at two sides of each connecting rod 62, the elastic filler is fiber balls, and the deep treatment tank 2 and the anaerobic tank 3 are communicated through first overflow holes 31 positioned on the side walls of the two;
as shown in fig. 1-3, a first gear 64 is arranged in the middle of the inside of the anaerobic tank 3 in the rotating shaft 61, a second gear 65 is arranged below the first gear 64 in a meshed connection manner, a connecting shaft 66 is arranged in the middle of the second gear 65, two ends of the connecting shaft 66 are rotationally connected with the inner wall of the anaerobic tank 3, 6 anaerobic biological turntables 32 are symmetrically arranged on the connecting shafts 66 on two sides of the second gear 65, a first reflux pump 33 is arranged at the top of the anaerobic tank 3, and the anaerobic tank 3 and the aerobic tank 4 are communicated through a second overflow hole 41 positioned on the side walls of the anaerobic tank and the aerobic tank;
as shown in fig. 2, a rotating shaft 61 is provided with 6 aerobic rotating discs 42 at one section inside an aerobic tank 4, fan blades 67 are arranged at two end parts of the rotating shaft 61 and are positioned at the inner middle part of a membrane filter tank 5, two MBR membrane components 52 are arranged inside the membrane filter tank 5, the rotating shaft 61 penetrates through the MBR membrane components 52 close to one side of the aerobic tank 4, the fan blades 67 are positioned between the two MBR membrane components 52, the aerobic tank 4 and the membrane filter tank 5 are communicated through a third overflow hole 51 positioned on the side walls of the two, and a reflux tank 7 is arranged at the rear sides of the membrane filter tank 5, the aerobic tank 4 and the anaerobic tank 3;
as shown in fig. 2 and 7, a baffle 71 is arranged in the middle of the reflux tank 7, a reflux sewage tank 72 is arranged at the front side of the baffle 71, a reflux sludge tank 73 is arranged at the rear side of the baffle 71, a fourth overflow hole 74 is arranged at the upper part of the side wall of the reflux sewage tank 72 corresponding to the aerobic tank 4, a second reflux pump 23 is arranged between the two reflux sewage tanks 72 corresponding to the rear side of the deep treatment tank 2, the second reflux pump 23 is communicated with the bottom of the reflux sewage tank 72 through a second reflux pipe 24, and a jet pipe 25 with an upward opening and corresponding to each baffle 63 is arranged at the output end of the second reflux pump 23 after penetrating the rear side wall of the deep treatment tank 2 for carrying out auxiliary impact driving on the driving assembly 6;
as shown in fig. 2, 4, 5 and 6, the bottom of the membrane filter tank 5 is provided with a sludge pump 53, the sludge pump 53 is communicated with one side of a backflow sludge tank 73 through a sludge pipe 54, the backflow sludge tank 73 extends to the middle of a backflow sludge tank 72, the first backflow pump 33 is communicated with the inside of the backflow sludge tank 73 through a first backflow pipe 34, the top of a partition plate 71 is slidably connected with a driving block 8, the driving block 8 is driven by a driving motor 81 positioned at the upper part of the side wall of the backflow tank 7, the driving motor 81 is a commercial electric push rod, the rear side of the driving block 8 is provided with a first telescopic rod 82, the tail end of the first telescopic rod 82 is provided with a second telescopic rod 83 facing the inside of the sludge tank, the tail end of the second telescopic rod 83 is provided with a mud scraper 84, the rear side wall and the bottom of the backflow sludge tank 73 near one end of the first backflow pipe 34 are respectively provided with an arc-shaped first limiting block 75 for pushing the mud scraper 84 to move obliquely upwards, the inner part of the backflow sludge tank 73, which is close to the front side wall and the bottom of one end of the driving motor 81, is provided with an arc-shaped second limiting block 76 for pushing the scraper plate 84 to move obliquely downwards, the rear side of the backflow sludge tank 73 is provided with a methanol tank 9, a groove 77 is formed between the methanol tank 9 and the backflow sludge tank 73, the inside of the groove 77 is slidably connected with a sliding block 91, the sliding block 91 is positioned above the first limiting block 75, one end of the sliding block 91 is provided with a stop block 92 for being in butt joint with the scraper plate 84, the other end of the sliding block 91 is connected with the inner wall of the backflow sludge tank 73 through a spring 93, a through hole 94 for guiding liquid in the methanol tank 9 is formed in the groove 77 on the back of the sliding block 91, when the spring 93 is in a natural extension state, the top of the baffle 71 is provided with a sliding rail 78, and the sliding rail 78 is slidably connected with a sliding groove 85 formed in the bottom of the driving block 8;
as shown in fig. 2, 7 and 8, a limit bump 26 is arranged at one side of the center of the bottom of the deep treatment tank 2, a spring shaft 68 for connecting with a connecting rod 62 is arranged at the inner bottom of a baffle 63, when the baffle 63 rotates to the position of the limit bump 26, the baffle is blocked by the limit bump 26 and rotates to a state parallel to the limit bump 26 through the spring shaft 68, 6 auxiliary baffle plates 69 are arranged at equal intervals in the circumferential direction of the lower part of the inner tail end of the anaerobic tank 3 corresponding to the first reflux pump 33, and the auxiliary baffle plates 69 and the output end below the first reflux pump 33 are corresponding to the auxiliary impact driving of the driving assembly 6.
Example 5
This embodiment differs from embodiment 4 in that:
the middle part of the rotating shaft 61 is provided with 8 connecting rods 62, 10 elastic filler disks 22 are symmetrically arranged on the rotating shafts 61 positioned on two sides of each connecting rod 62, 4 anaerobic biological turntables 32 are symmetrically arranged on the connecting shafts 66 positioned on two sides of the second gear 65, 8 aerobic biological turntables 42 are arranged on one section of the rotating shaft 61 positioned in the aerobic tank 4, and 5 auxiliary baffle plates 69 are circumferentially and equidistantly arranged on the rotating shaft 61 at the lower part of the inner tail end of the anaerobic tank 3 corresponding to the first reflux pump 33.
Working principle:
the working principle of the domestic sewage treatment apparatus of the present invention will be further described with reference to the domestic sewage treatment process of the present invention.
The return flow principle of sludge: the sludge is pumped into the backflow sludge tank 73 through the sludge pump 53 and the sludge pipe 54, the driving motor 81 is started to drive the driving block 8 to move, the sliding rail 78 slides in the sliding groove 85 to keep the stability of the driving block 8, the sludge at the bottom of the tank is scraped forward through the scraping plate 84 to enable the sludge to be close to the bottom of the first backflow pipe 34 so as to be convenient to transport, when the scraping plate 84 moves to a position close to the first backflow pipe 34, the scraping plate 84 pushes the stopping block 92 to drive the sliding block 91 to slide in the groove 77, the sliding block 91 does not stop the through hole 94 any more, the methanol solution in the methanol tank 9 flows into the backflow sludge tank 73 and can flow back together with the sludge, when the scraping plate 84 moves to the two first stopping blocks 75, the two first stopping blocks 75 push the scraping plate 84 to move obliquely upwards through arc end surfaces so as to be contacted with the stopping block 92, the sliding block 91 is rebounded under the action of the spring 93, then the driving motor 81 drives the driving block 8 and the scraping plate 84 to move back, when the scraping plate 84 contacts with the second stopping block 76, the two second stopping blocks 76 move obliquely downwards under the action of the two first stopping blocks 76 so as to start the sludge scraping process again;
the internal working principle of the anaerobic tank 3 is as follows: the returned sludge is injected into the anaerobic tank 3 through the first return pump 33, the mixture of the sludge and the methanol solution impacts the jet auxiliary baffle 69 to assist in driving the rotating shaft 61 to rotate, and meanwhile, when the first gear 64 rotates, the second gear 65 is driven to rotate, so that the connecting shaft 66 is driven to rotate, and the anaerobic biological rotating disc 32 on the connecting shaft 66 is driven to rotate;
the reflux principle of sewage: after overflowing into the backflow sewage tank 72, the sewage treated in the aerobic tank 4 flows back into the advanced treatment tank 2 through the second backflow pump 23 and the second backflow pipe 24, so that the baffle 63 is driven in an auxiliary way through jet flow of the jet pipe 25;
the principle of operation of the limit bump 26: when the baffle 63 rotates to the position of the limit lug 26, the baffle 63 is blocked and rotated to be parallel to the limit lug 26 under the action of the limit lug 26 and the spring shaft 68, as shown in the state of fig. 7, the resistance of the baffle 63 is reduced, so that the rotation resistance of the driving assembly 6 is smaller and the ideal rotation speed is reached.
Experimental example
The domestic sewage treatment equipment of the invention is subjected to field test, which is carried out on COD, TN, NH 4 - The removal rates of N were 61.2%, 96.8% and 98.7%, respectively, with the rotational speed of the drive assembly 6 being optimised for a volume of the further processing tank 2 of 10m 3 When the immersed height is 38%, 20-40 kg of pulling force is required for rotation, the water inflow is 300t/d, and the ideal rotating speed of the driving assembly 6 is 2r/min.
Claims (9)
1. The domestic sewage treatment process is characterized by comprising the following steps of:
s1, preliminary impurity removal: injecting domestic sewage into the grid pool (1), filtering by a grid net in the grid pool (1), and pumping the domestic sewage into the advanced treatment pool (2) through a lift pump (21);
s2, primary deep treatment: the domestic sewage subjected to preliminary impurity removal is pressurized by a lifting pump (21) and then is subjected to impact driving on a driving component (6) in the advanced treatment tank (2), elastic filler filled on the driving component (6) is used for carrying out primary degradation on the domestic sewage, and then the domestic sewage overflows into anaerobic tanks (3) positioned at two sides of the advanced treatment tank (2);
s3, secondary advanced treatment: the domestic sewage is subjected to anaerobic biological treatment in an anaerobic tank (3) through an anaerobic biological rotating disc (32), and the domestic sewage subjected to anaerobic biological treatment overflows into an aerobic tank (4) and is subjected to aerobic biological treatment through an aerobic biological rotating disc (42);
s4, cyclic treatment: one part of the domestic sewage subjected to aerobic biological treatment is returned to the advanced treatment tank (2) for carrying out the first-stage advanced treatment and the second-stage advanced treatment again, and the rest part of the domestic sewage enters the membrane filtration tank (5);
s5, membrane separation treatment: and (3) carrying out membrane separation treatment on domestic sewage through an MBR membrane in a membrane filter tank (5), refluxing part of sludge obtained by the membrane separation treatment to an anaerobic tank (3), simultaneously adding a methanol solution into the anaerobic tank (3), collecting and discharging residual sludge, and collecting and discharging the domestic sewage after the membrane separation treatment.
2. The domestic sewage treatment process according to claim 1, wherein 30-40% of the total amount of the domestic sewage treated by the aerobic organisms is returned to the advanced treatment tank (2) in the step S4.
3. The domestic sewage treatment process according to claim 1, wherein in the step S5, 20-30% of the total amount of sludge obtained by the membrane separation treatment is returned to the anaerobic tank (3), the weight ratio of the methanol solution to the returned sludge is 1:5-10, and the mass concentration of the methanol solution is 60-80%.
4. A domestic sewage treatment process according to claim 1, wherein the submerged height of the domestic sewage in the deep treatment tank (2) is 35-40%, the submerged height in the anaerobic tank (3) is 30-35%, the submerged height in the aerobic tank (4) is 40-45%, and the submerged height in the membrane treatment tank is 60-65%.
5. The treatment equipment for the domestic sewage treatment process according to any one of claims 1 to 4, comprising a grid pool (1), an advanced treatment pool (2) positioned at the rear side of the grid pool (1), anaerobic pools (3) positioned at the left side and the right side of the advanced treatment pool (2), wherein an aerobic pool (4) and a membrane filtration pool (5) are sequentially arranged at one side of the two anaerobic pools (3) away from the advanced treatment pool (2) side by side, and a driving component (6) is arranged in the middle of the advanced treatment pool (2);
the driving assembly (6) comprises a rotating shaft (61) with two ends penetrating through the anaerobic tank (3) and the aerobic tank (4) in sequence and extending to the inside of the membrane filter tank (5), a plurality of connecting rods (62) are arranged in the middle of the rotating shaft (61), a baffle (63) is arranged at the tail end of each connecting rod (62), a lifting pump (21) is arranged on the upper part of the inner wall of the front side of the deep treatment tank (2), the lower output end of the lifting pump (21) corresponds to each baffle (63) and is used for carrying out impact driving on the driving assembly (6), a plurality of elastic filler discs (22) are symmetrically arranged on the rotating shafts (61) positioned on two sides of each connecting rod (62), and the deep treatment tank (2) and the anaerobic tank (3) are communicated through first overflow holes (31) positioned on the side walls of the two;
the rotating shaft (61) is provided with a first gear (64) in the middle of the inside of the anaerobic tank (3), a second gear (65) is arranged below the first gear (64) in a meshed connection manner, the middle of the second gear (65) is provided with a connecting shaft (66), two ends of the connecting shaft (66) are rotationally connected with the inner wall of the anaerobic tank (3), a plurality of anaerobic biological turntables (32) are symmetrically arranged on the connecting shafts (66) on two sides of the second gear (65), a first reflux pump (33) is arranged at the top of the anaerobic tank (3), and the anaerobic tank (3) and the aerobic tank (4) are communicated through second overflow holes (41) on the side walls of the two;
the rotating shaft (61) is positioned in the aerobic tank (4), a plurality of aerobic biological rotating discs (42) are arranged at one section of the rotating shaft (61), fan blades (67) are arranged at two ends of the rotating shaft (61), the fan blades (67) are positioned in the middle of the membrane filter tank (5), two MBR (membrane bioreactor) membrane modules (52) are arranged in the membrane filter tank (5), the rotating shaft (61) penetrates through the MBR membrane modules (52) close to one side of the aerobic tank (4), the fan blades (67) are positioned between the two MBR membrane modules (52), the aerobic tank (4) and the membrane filter tank (5) are communicated through third overflow holes (51) on the side walls of the two MBR membrane modules, and a reflux tank (7) is arranged at the rear side of the membrane filter tank (5), the aerobic tank (4) and the anaerobic tank (3).
6. The domestic sewage treatment device according to claim 5, wherein the rotating shaft (61) is in rotary and sealing limiting connection with the side walls of the anaerobic tank (3), the aerobic tank (4) and the membrane filtration tank (5).
7. The domestic sewage treatment equipment according to claim 5, wherein a partition plate (71) is arranged in the middle of the backflow pond (7), a backflow sewage pond (72) is arranged at the front side of the partition plate (71), a backflow sludge pond (73) is arranged at the rear side of the partition plate (71), a fourth overflow hole (74) is arranged at the upper part of the side wall of the backflow sewage pond (72) corresponding to the aerobic pond (4), a second backflow pump (23) is arranged between the two backflow sewage ponds (72) corresponding to the rear side of the advanced treatment pond (2), the second backflow pump (23) is communicated with the bottom of the backflow sewage pond (72) through a second backflow pipe (24), and a jet pipe (25) with an upward opening and corresponding to each baffle (63) is arranged behind the rear side wall of the second backflow pump (23) and is used for performing auxiliary impact driving on the driving assembly (6).
8. The domestic sewage treatment apparatus according to claim 7, wherein a sludge pump (53) is arranged at the bottom of the membrane filtration tank (5), the sludge pump (53) is communicated with one side of the backflow sludge tank (73) through a sludge pipe (54), the backflow sludge tank (73) extends to the middle part of the backflow sludge tank (72), the first backflow pump (33) is communicated with the inside of the backflow sludge tank (73) through a first backflow pipe (34), a driving block (8) is arranged at the top of the partition plate (71) in a sliding connection manner, the driving block (8) is driven by a driving motor (81) arranged at the upper part of the side wall of the backflow tank (7), a first telescopic rod (82) is arranged at the rear side of the driving block (8), a mud scraper (84) is arranged at the tail end of the first telescopic rod (82) and a first limit block (75) is arranged at the tail end of the second telescopic rod (83), one end of the backflow sludge tank (73) close to the inside of the first backflow pipe (34), an arc-shaped first limit block (75) is arranged at the rear side wall and the bottom of the backflow sludge tank (73) is used for driving the mud (84) obliquely upwards and the mud (84) to the front end (76) is arranged at the front end of the mud tank, the back side of the backflow sludge tank (73) is provided with a methanol tank (9), a slot (77) is formed between the methanol tank (9) and the backflow sludge tank (73), a slide block (91) is arranged in the slot (77) in a sliding mode, the slide block (91) is located above the first limiting block (75), one end of the slide block (91) is provided with a stop block (92) for being abutted to a mud scraping plate (84), the other end of the slide block (91) is connected with the inner wall of the backflow sludge tank (73) through a spring (93), a through hole (94) for guiding liquid inside the methanol tank (9) is formed in the slot (77) in the back side of the slide block (91), the slide block (91) blocks the through hole (94) when the spring (93) is in a natural extension state, a slide rail (78) is arranged at the top of the partition plate (71), and the slide rail (78) is in sliding connection with a slide groove (85) arranged at the bottom of the driving block (8).
9. The domestic sewage treatment device according to claim 8, wherein a limiting lug (26) is arranged on one side of the center of the bottom of the deep treatment tank (2), a spring shaft (68) used for being connected with the connecting rod (62) is arranged at the inner bottom of the baffle (63), when the baffle (63) rotates to the position of the limiting lug (26), the baffle is blocked by the limiting lug (26) and rotates to be parallel to the state of the limiting lug (26) through the spring shaft (68), a plurality of auxiliary baffle pieces (69) are circumferentially and equidistantly arranged at the inner tail end of the anaerobic tank (3) corresponding to the lower part of the first reflux pump (33), and the auxiliary baffle pieces (69) and the output end below the first reflux pump (33) are correspondingly used for carrying out auxiliary impact driving on the driving component (6).
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| CN202310730270.7A CN116730500B (en) | 2023-06-20 | 2023-06-20 | Domestic sewage treatment process and treatment equipment thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117700055A (en) * | 2024-02-05 | 2024-03-15 | 广州市市政工程设计研究总院有限公司 | Sewage treatment device and method for sewage plant |
| CN117964102A (en) * | 2024-03-29 | 2024-05-03 | 广州众行环保科技有限公司 | Advanced treatment system for recycling reclaimed water of activated sludge |
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| CN104944682A (en) * | 2015-05-26 | 2015-09-30 | 浦华环保有限公司 | Membrane-bioreactor domestic sewage treatment device and treatment method |
| CN105712579A (en) * | 2016-02-06 | 2016-06-29 | 天津科技大学 | Seaborne platform high-salinity domestic sewage processing and recycling device |
| CN210438571U (en) * | 2019-04-30 | 2020-05-01 | 盛世生态环境股份有限公司 | Distributed sewage treatment system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104944682A (en) * | 2015-05-26 | 2015-09-30 | 浦华环保有限公司 | Membrane-bioreactor domestic sewage treatment device and treatment method |
| CN105712579A (en) * | 2016-02-06 | 2016-06-29 | 天津科技大学 | Seaborne platform high-salinity domestic sewage processing and recycling device |
| CN210438571U (en) * | 2019-04-30 | 2020-05-01 | 盛世生态环境股份有限公司 | Distributed sewage treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117700055A (en) * | 2024-02-05 | 2024-03-15 | 广州市市政工程设计研究总院有限公司 | Sewage treatment device and method for sewage plant |
| CN117700055B (en) * | 2024-02-05 | 2024-04-09 | 广州市市政工程设计研究总院有限公司 | Sewage treatment device and method for sewage plant |
| CN117964102A (en) * | 2024-03-29 | 2024-05-03 | 广州众行环保科技有限公司 | Advanced treatment system for recycling reclaimed water of activated sludge |
| CN117964102B (en) * | 2024-03-29 | 2024-05-28 | 广州众行环保科技有限公司 | Advanced treatment system for recycling reclaimed water of activated sludge |
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| CN116730500B (en) | 2024-07-26 |
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