CN210150897U - Reclaimed water recycling device - Google Patents
Reclaimed water recycling device Download PDFInfo
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- CN210150897U CN210150897U CN201821540274.XU CN201821540274U CN210150897U CN 210150897 U CN210150897 U CN 210150897U CN 201821540274 U CN201821540274 U CN 201821540274U CN 210150897 U CN210150897 U CN 210150897U
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Abstract
The utility model relates to a reclaimed water recycling device, which mainly comprises a pretreatment unit, an advanced oxidation unit, a biochemical treatment unit, a double-membrane advanced treatment unit and a corresponding pipeline and pump valve system. The pretreatment unit at least comprises a high-efficiency clarification tank unit and a sand filtration unit, and the high-efficiency clarification tank unit at least comprises a coagulation unit, a flocculation unit and a sedimentation clarification unit; the advanced oxidation unit at least comprises an ozone generator, an ozone contact pool and an ozone buffer pool; the ozone generator at least comprises an oxygen generation system unit and an ozone generation chamber; the double-membrane advanced treatment unit at least comprises an ultrafiltration unit and a reverse osmosis unit, and the reverse osmosis unit at least comprises a reverse osmosis water production tank and a microporous filter; the biochemical treatment unit at least comprises a biological aerated filter and a moving bed biofilm reactor.
Description
Technical Field
The utility model relates to a water treatment technical field especially relates to a reuse of reclaimed water device.
Background
China is a country with shortage of water resources and frequent water disasters, the shortage of water resources and increasingly serious water pollution become bottlenecks which restrict social progress and economic development of China, and simultaneously, the development of urban sewage treatment and standard-reaching sewage utilization work is greatly promoted.
The reclaimed water mainly refers to water which reaches a certain water quality standard after urban industrial sewage, domestic sewage or rainwater are treated and can be reused in a certain range, and the water quality of the reclaimed water is between that of upper water and lower water.
For example, chinese patent publication No. CN206927725U discloses a reclaimed water recycling device, which comprises a sewage tank, a primary sedimentation tank, a multi-media filter, an activated carbon filter, an ultrafiltration device, a secondary sedimentation tank, a security filter, a primary reverse osmosis device, a water storage tank and a water consumption point, which are sequentially connected through a pipeline; chemical dosing devices are arranged between the sewage tank and the primary sedimentation tank, between the primary sedimentation tank and the multi-media filter, between the multi-media filter and the activated carbon filter, and between the secondary sedimentation tank and the security filter; a sterilizing and disinfecting device is arranged between the primary reverse osmosis device and the water storage tank; a booster pump is arranged on a pipeline between the cartridge filter and the primary reverse osmosis device; the water consumption point is provided with a pipeline communicated with the sewage pool.
Although the reclaimed water recycling is realized through devices such as sedimentation and filtration, no effective equipment is arranged for treatment on the problems of large chromaticity of raw water and poor biodegradability, so that severe sewage is treated incompletely, and the waste and increase of labor cost and material cost are further caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reclaimed water recycling device.
A reclaimed water recycling device comprises a pretreatment unit, an advanced oxidation unit, a biochemical treatment unit and a double-membrane advanced treatment unit, wherein the pretreatment unit at least comprises a high-efficiency clarification tank unit and a sand filtration unit, and the high-efficiency clarification tank unit at least comprises a coagulation unit, a flocculation unit and a sedimentation clarification unit; the coagulation unit, the flocculation unit and the sedimentation and clarification unit are connected in series, and the sand filtration unit is connected with the sedimentation and clarification unit;
the advanced oxidation unit at least comprises an ozone generator, an ozone contact pool and an ozone buffer pool; the ozone generator at least comprises an oxygen generation system unit and an ozone generation chamber; the oxygen generation system unit is connected with the ozone contact tank through the ozone generation chamber, the ozone contact tank is connected with the sand filtration unit, and the ozone buffer tank is connected with the ozone contact tank;
the double-membrane advanced treatment unit at least comprises an ultrafiltration unit and a reverse osmosis unit, the reverse osmosis unit at least comprises a reverse osmosis water production tank and a microporous filter, the reverse osmosis water production tank is connected with the microporous filter, and the ultrafiltration unit is connected with the microporous filter in series;
the biochemical treatment unit at least comprises a biological aerated filter and a moving bed biofilm reactor, and the biological aerated filter and the moving bed biofilm reactor are connected in parallel between the ozone buffer tank and the ultrafiltration unit.
According to a preferred embodiment, the high efficiency clarifier unit is provided with a sludge recirculation system.
According to a preferred embodiment, the ozone generator is provided with a closed-loop circulating cooling water system, which at least comprises a plate heat exchanger, a circulating water pump and a valve, wherein the plate heat exchanger is connected with the circulating water pump through the valve, and the circulating water pump is connected with the ozone generating chamber.
According to a preferred embodiment, the ozone generator is provided with a flow switch, a temperature transmitter and an alarm for alarming when the cooling water flow is insufficient or the temperature exceeds a set threshold.
According to a preferred embodiment, the ozone contact tank is provided with a micro-porous aeration disc.
According to a preferred embodiment, the micro-porous aeration disc at least comprises a tray, an elastic membrane and a sealing hoop, wherein the sealing hoop is in a concave shape, the tray and the elastic membrane are arranged in the concave part of the sealing hoop in a clamping manner, and two ends of the sealing hoop are fixed in the ozone contact tank by bolts and nuts. The ozone generating chamber is connected with the ozone contact tank through the microporous aeration disc.
According to a preferred embodiment, the elastic membrane is provided with a plurality of through holes, and the through holes are uniformly distributed on the elastic membrane in a spiral shape along the center of the elastic membrane.
The through hole is in an open state under the condition of introducing ozone, so that the ozone generating chamber is communicated with the ozone contact pool;
the through hole is in a closed state under the condition that ozone is not introduced, so that the ozone generating chamber is separated from the ozone contact tank.
According to a preferred embodiment, the advanced oxidation unit is provided with a tail gas destructor connected to a tail gas discharge of the ozone contact tank by a demister.
According to a preferred embodiment, the ultrafiltration unit is provided with a backwash water pump. The ultrafiltration membrane can be periodically backwashed, chemically cleaned and enhanced chemically cleaned.
According to a preferred embodiment, the reverse osmosis unit is provided with a backwash water tank connected to a microporous filter.
The beneficial technical effects of the utility model are as follows.
The utility model provides a pair of reclaimed water recycling device, it operates reliably, the throughput is strong and efficient ① adopts high-efficient depositing reservoir, reduce hardness through the physical chemistry reaction, COD, colloid and turbidity etc, improve the efficiency and the operating stability of advanced oxidation unit, ② adopts the ozone oxidation technology, on the basis of guaranteeing the chroma clearance, further degrade COD and improve waste water biodegradability, ③ adopts aeration biological filter technology and removes bed biofilm reactor, further degrade COD, guarantee that the two membranes advance water and stabilize ④ and adopt the two embranes method, ultrafiltration + reverse osmosis promptly, can be stable take off the salt content etc. of reclaimed water.
Drawings
Fig. 1 is a schematic structural view of a reclaimed water recycling device according to an embodiment of the present invention; and
fig. 2 is a schematic structural diagram of one preferred embodiment of the microporous aeration disc in the reclaimed water reusing device of the present invention.
List of reference numerals
1: a coagulation unit 12: tail gas destructor
2: the sand filtering unit 13: plate heat exchanger
3: ozone contact tank 14: valve gate
4: ozone generation chamber 15: reverse osmosis water producing tank
5: oxygen generation system unit 16: backwashing water tank
6: the aeration biological filter 17: microporous aeration disc
7: moving bed biofilm reactor 18: elastic diaphragm
8: ultrafiltration unit 19: tray
9: the microporous filter 20: hoop for sealing
10: a flocculation unit 21: circulating water pump
11: a sedimentation clarification unit 22: ozone buffer pool
Detailed Description
A preferred embodiment of a soft water treatment apparatus according to the present invention will be described in detail with reference to FIGS. 1 and 2. In fig. 1 and 2, the arrows indicate only the flow direction of the water flow or sludge.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
As shown in fig. 1, the reclaimed water recycling device provided by the embodiment comprises a pretreatment unit, an advanced oxidation unit, a biochemical treatment unit and a double-membrane advanced treatment unit, wherein the pretreatment unit at least comprises a high-efficiency clarification tank unit and a sand filtration unit 2. The high-efficiency clarification tank unit at least comprises a coagulation unit 1, a flocculation unit 10 and a sedimentation and clarification unit 11. The coagulation unit 1, the flocculation unit 10 and the sedimentation and clarification unit 11 are connected in series. The sand filtration unit 2 is connected with the sedimentation and clarification unit 11. The advanced oxidation unit at least comprises an ozone generator, an ozone contact tank 3 and an ozone buffer tank 22. The ozone generator at least comprises an oxygen generation system unit 5 and an ozone generation chamber 4. The oxygen generation system unit 5 is connected with the ozone contact tank 3 through the ozone generation chamber 4. The ozone contact tank 3 is connected with the sand filtering unit 2. The ozone buffer tank 22 is connected with the ozone contact tank 3. The advanced treatment unit of the double-membrane method at least comprises an ultrafiltration unit 8 and a reverse osmosis unit. The reverse osmosis unit at least comprises a reverse osmosis water production tank 15 and a microporous filter 9, and the reverse osmosis water production tank 15 is connected with the microporous filter 9. The ultrafiltration unit 8 and the microporous filter 9 are connected in series. The biochemical treatment unit at least comprises a biological aerated filter 6 and a moving bed biofilm reactor 7. The aeration biological filter 6 and the moving bed biofilm reactor 7 are connected in parallel between the ozone buffer tank 22 and the ultrafiltration unit 8.
The technical core of the coagulation unit 1, the flocculation unit 10 and the sedimentation and clarification unit 11 lies in the application of sludge reflux and inclined tube sedimentation, and a coagulation core is provided through sludge reflux, the concentration of suspended matters in a reaction zone is increased, the flocculation effect is enhanced, and part of medicaments are recovered.
The oxygen generation system unit 5 adopts oxygen as a raw material to prepare ozone, ozonization oxygen is produced, the concentration, the yield and the yield of the ozone can be improved by times, and simultaneously, the functions of removing algae and smelling, strengthening coagulation and improving the biodegradability of organic matters in water are utilized to treat the effluent of the high-efficiency clarification tank.
The basic principle of the biological aerated filter 6 is that on the basis of primary reinforcement, granular fillers and attached and grown biological membranes are taken as main treatment media, and the biological metabolism, the physical filtration, the physical adsorption of the biological membranes and the fillers and the graded predation of food chains in a reactor are fully exerted. The removal of pollutants in the same unit reactor is realized, and the biological aerated filter 6 omits secondary sedimentation equipment by using the design principles of a biological contact oxidation reactor and deep filtration for reference. Different aerobic and anoxic regions exist in the reactor. Can synchronously realize nitrification and denitrification, and achieves the aim of removing the organic matters and simultaneously removing the nitrogen.
The moving bed biofilm reactor 7 is characterized in that a certain amount of floating carriers for providing microorganism attachment growth surfaces are added into an aeration tank of the traditional activated sludge process, so that an attachment phase and a suspension phase exist in the aeration biological filter 6 at the same time, and a composite biological treatment process is formed. The biological suspended stuffing is filled in a biological membrane reactor, the specific gravity of the adopted biological suspended stuffing is close to that of water, the biological suspended stuffing is easy to move freely along with the water under slight stirring, the effective surface area is large, the biological suspended stuffing is suitable for the adsorption growth of microorganisms, the rising buoyancy of air bubbles pushes the stuffing and the surrounding water body to flow when aeration and oxygenation are carried out, and the air flow is blocked by the stuffing when passing through the gap between water flow and the stuffing and is divided into small bubbles. In the process, the filler is fully stirred and mixed with the water flow, and the air flow is fully divided into fine bubbles, so that the contact between the biological membrane and oxygen and the oxygen transmission efficiency are increased, and the aim of purifying the sewage is fulfilled in a short time. The composite biological treatment system has the characteristics of impact load resistance, long sludge age and small amount of excess sludge of the traditional biological membrane method, and has the characteristics of high efficiency and flexible operation of an activated sludge method.
The operating principle of the ultrafiltration unit 8 is: under the action of pressure, solvent and small solute particles in the raw material liquid permeate the low-pressure side of the membrane from the high-pressure liquid side, and the liquid is gradually concentrated because macromolecules and particles with the size larger than the pore diameter of the membrane are blocked by the membrane; the macromolecules, colloids, proteins, particles and the like in the solution are intercepted by the ultrafiltration membrane and recovered as concentrated solution.
Above-mentioned technical scheme does the utility model discloses a core scheme.
Preferably, the high-efficiency clarification tank unit is provided with a sludge circulating system which can lift sludge from the sludge concentration area to the water inlet pipe of the reaction tank to be mixed with raw water.
Preferably, the ozone generator is provided with a closed-loop circulating cooling water system, the closed-loop circulating cooling water system at least comprises a plate heat exchanger 13, a circulating water pump 21 and a valve 14, the plate heat exchanger 13 is connected with the circulating water pump 21 through the valve 14, and the circulating water pump 21 is connected with the ozone generating chamber 4.
Preferably, the ozone generator is provided with a flow switch, a temperature transmitter and an alarm for alarming when the flow of cooling water is insufficient or the temperature exceeds a set threshold value.
Preferably, the ozone contact tank 3 is provided with a microporous aeration disk 17, which can be in full contact reaction with the water in the ozone contact tank 3.
Preferably, the micro-porous aeration disk 17 includes at least a tray 19, an elastic membrane 18, and a sealing hoop 20, the sealing hoop 20 is formed in a concave shape, the tray 19 and the elastic membrane 18 are disposed in the concave shape of the sealing hoop 20 in a snap-fit manner, and both ends of the sealing hoop 20 are fixed inside the ozone contact tank 3 by bolts and nuts. The ozone generating chamber 4 is connected with the ozone contact tank 3 through a microporous aeration disc 17.
Preferably, the elastic membrane is provided with a plurality of through holes, and the through holes are uniformly distributed on the elastic membrane in a spiral shape along the center of the elastic membrane.
The through hole is in an open state under the condition of introducing ozone, so that the ozone generating chamber is communicated with the ozone contact pool; the through hole is in a closed state under the condition that ozone is not introduced, so that the ozone generating chamber is separated from the ozone contact pool.
Preferably, the advanced oxidation unit is provided with a tail gas destructor 12, and the tail gas destructor 12 is connected with a tail gas discharge port of the ozone contact tank 3 through a demister. The tail gas destructor 12 decomposes ozone by heating and catalyzing, the concentration of ozone in decomposed gas is less than 0.1ppm, and the decomposed gas can be directly discharged into the atmosphere.
Preferably, the ultrafiltration unit 8 is provided with a backwashing water pump, and the ultrafiltration membrane can be periodically backwashed, chemically cleaned and enhanced chemically cleaned.
Preferably, the reverse osmosis unit is provided with a backwash water tank 16, the backwash water tank 16 being connected to the microporous filter 9. Water molecules and a very small amount of small molecular weight organic matters pass through the film layer, are concentrated by the collecting pipeline and then are injected into the reverse osmosis water production tank 15 through the water production pipe. On the contrary, the substances which can not pass through the membrane layer are collected by the other group of collecting pipelines and then lead to a concentrated water discharge pipe to be discharged to the backwashing water tank 16.
The water treatment principle of the reclaimed water recycling device of the utility model is as follows.
Water from a sewage treatment plant automatically flows to the high-efficiency clarification tank unit, sequentially enters the coagulation unit 1 and the flocculation unit 10, is sequentially added with lime milk, polyferric oxide and PAM, and is fully mixed and reacted under the action of return sludge to form alum floc with larger particles. Then the sludge enters a sedimentation and clarification unit 11, the sludge sinks to the bottom of the sedimentation and clarification unit 11 under the action of gravity, and fine particles rising along with water flow are intercepted on the wall of an inclined pipe by utilizing the shallow pool sedimentation action of the inclined pipe, gradually increase and then settle to the bottom of the sedimentation and clarification unit 11; the clean water slowly rises and overflows out of the high-efficiency clarification tank unit and enters the sand filtration unit 2, and the residual SS and turbidity in the water are filtered by the uniform-particle filter material. After raw water automatically flows into the sand filtration unit 2, SS and turbidity which cannot be removed by the high-efficiency clarification tank unit can be removed, and the turbidity entering the ozone contact tank is ensured to be less than or equal to 1NTU and less than or equal to 3NTU under special conditions; on the other hand, the impact of raw water is effectively prevented, the SS and the turbidity of the raw water entering the ozone contact tank 3 can be ensured to meet the water quality requirement, the ozone consumption is reduced, and the blockage of the microporous aeration disc 17 is prevented.
The filtered water of the sand filtering unit 2 is conveyed to the ozone contact tank 3, the ozone contact tank 3 is provided with a micropore aeration disc 17, the reclaimed water to be oxidized is in reverse contact with ozone in the ozone contact tank 3, the ozone forms bubbles of 60-70 mu m and is fully mixed with the water, and the utilization rate of the ozone is improved. The raw water is aerated by ozone to remove part of COD and chromaticity, thereby creating conditions for the subsequent biochemical part.
The oxygen produced by the oxygen producing system unit 5 enters the ozone generating chamber 4 after dust filtration, pressure reduction and stabilization. Partial oxygen in the ozone generating chamber is changed into ozone through medium-frequency high-voltage discharge, and product gas is output from an ozone gas outlet after being monitored and adjusted in temperature, pressure and flow and enters an ozone contact tank 3.
After the raw water passes through the ozone contact tank 3, a part of the dissolved ozone remains, and if the dissolved ozone directly enters the biochemical part, the ozone may impact microorganisms. The ozone buffer tank 22 eliminates the residual amount of ozone in the treated water by utilizing the characteristic that the half-life period of ozone is only 20 min. The raw water enters the biological aerated filter 6 after passing through the ozone buffer tank 22.
In the aeration biological filter 6, the oxidized reclaimed water enters from the bottom and contacts in the same direction, COD and ammonia nitrogen in the water are decomposed by utilizing the microbial oxidation decomposition effect in the biomembrane growing on the filler in the reactor, the adsorption and interception effects of the filler and the biomembrane, the food chain grading predation effect formed along the water flow direction and the denitrification effect of the microenvironment in the biomembrane and the anaerobic section, and meanwhile, part of SS is removed, and the effluent meets the requirement of entering the double membranes.
The treated reclaimed water enters the ultrafiltration unit 8 and enters from the inside of the membrane wire, SS and turbidity are intercepted inside the membrane wire, the filtered water is collected in the membrane shell, the ultrafiltration unit 8 is provided with a backwashing water pump, and backwashing, chemical cleaning and enhanced chemical cleaning are regularly carried out on the ultrafiltration membrane.
The turbidity of the water after ultrafiltration treatment is reduced to below 1NTU, the SDI is reduced to below 2, and then the water enters a reverse osmosis system, and the reverse osmosis is divided into two sections according to the proportion of 18: 9, the produced water enters a reverse osmosis water production tank 15, and the concentrated water enters a reverse washing water tank 16 and is finally discharged.
It should be noted that the above-mentioned embodiments are exemplary, and those skilled in the art can devise various solutions in light of the present disclosure, which are also within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present specification and drawings are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.
Claims (5)
1. A reclaimed water recycling device is characterized by comprising a pretreatment unit, an advanced oxidation unit, a biochemical treatment unit and a double-membrane advanced treatment unit,
the pretreatment unit at least comprises a high-efficiency clarification tank unit and a sand filtration unit (2), wherein the high-efficiency clarification tank unit at least comprises a coagulation unit (1), a flocculation unit (10) and a sedimentation clarification unit (11); the coagulation unit (1), the flocculation unit (10) and the sedimentation and clarification unit (11) are connected in series, the sand filtration unit (2) is connected with the sedimentation and clarification unit (11), and the high-efficiency clarification tank unit is also provided with a sludge circulation system;
the sedimentation and clarification unit (11) is arranged in an inclined tube form, the sedimentation and clarification unit (11) in the inclined tube form comprises a sludge inlet, a sludge hopper and a sludge discharge port, a first valve is arranged at the front end of the sludge inlet, and a dredging device is arranged at the sludge discharge port;
the advanced oxidation unit at least comprises an ozone generator, an ozone contact pool (3) and an ozone buffer pool (22); the ozone generator at least comprises an oxygen generation system unit (5) and an ozone generation chamber (4); the oxygen generation system unit (5) is connected with the ozone contact tank (3) through the ozone generation chamber (4), the ozone contact tank (3) is connected with the sand filtration unit (2), the ozone buffer tank (22) is connected with the ozone contact tank (3), the ozone contact tank (3) is provided with a micropore aeration disc (17),
the microporous aeration disc (17) at least comprises a tray (19), an elastic membrane (18) and a sealing hoop (20), the sealing hoop (20) is concave, the tray (19) and the elastic membrane (18) are arranged at the concave part of the sealing hoop (20) in a clamping mode, two ends of the sealing hoop (20) are fixed in the ozone contact tank (3) through bolts and nuts, the ozone generating chamber (4) is connected with the ozone contact tank (3) through the microporous aeration disc (17),
the elastic membrane (18) is provided with a plurality of through holes, the through holes are uniformly distributed on the elastic membrane (18) along the center of the elastic membrane (18) in a spiral shape, the through holes are obliquely arranged on the elastic membrane (18),
the through hole is in an open state under the condition of introducing ozone, so that the ozone generating chamber (4) is communicated with the ozone contact pool (3),
the through hole is in a closed state under the condition that ozone is not introduced, so that the ozone generating chamber (4) is isolated from the ozone contact pool (3);
the double-membrane advanced treatment unit at least comprises an ultrafiltration unit (8) and a reverse osmosis unit, the reverse osmosis unit at least comprises a reverse osmosis water production tank (15) and a microporous filter (9), and a sewage disinfection device is arranged at the rear end of the microporous filter (9);
the reverse osmosis water production tank (15) is connected with the microporous filter (9), the ultrafiltration unit (8) is connected with the microporous filter (9) in series,
the reverse osmosis unit is provided with a reverse washing water tank (16), and the reverse washing water tank (16) is connected with the microporous filter (9);
the biochemical treatment unit at least comprises a biological aerated filter (6) and a moving bed biofilm reactor (7), the biological aerated filter (6) and the moving bed biofilm reactor (7) are connected in parallel between the ozone buffer tank (22) and the ultrafiltration unit (8),
a floating carrier is arranged in the biological aerated filter (6), the floating carrier is biological suspension filler, and the specific gravity of the biological suspension coating is close to that of water.
2. The reclaimed water reusing device according to claim 1, wherein the ozone generator is provided with a closed-loop circulating cooling water system, the closed-loop circulating cooling water system at least comprises a plate heat exchanger (13), a circulating water pump (21) and a valve (14), the plate heat exchanger (13) is connected with the circulating water pump (21) through the valve (14), and the circulating water pump (21) is connected with the ozone generating chamber (4).
3. The reclaimed water reusing device according to claim 2, wherein the ozone generator is provided with a flow switch, a temperature transmitter and an alarm for alarming when the flow rate of the cooling water is insufficient or the temperature exceeds a set threshold.
4. The reclaimed water reusing device according to claim 1, wherein the advanced oxidation unit is provided with a tail gas destructor (12), and the tail gas destructor (12) is connected with a tail gas discharge port of the ozone contact tank (3) through a demister.
5. The reclaimed water reusing device according to claim 1, wherein the ultrafiltration unit (8) is provided with a backwash water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821540274.XU CN210150897U (en) | 2018-09-20 | 2018-09-20 | Reclaimed water recycling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821540274.XU CN210150897U (en) | 2018-09-20 | 2018-09-20 | Reclaimed water recycling device |
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| CN210150897U true CN210150897U (en) | 2020-03-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111847795A (en) * | 2020-07-31 | 2020-10-30 | 新疆中泰创新技术研究院有限责任公司 | System and method for recycling and treating PTA reclaimed water |
| CN114956487A (en) * | 2022-07-04 | 2022-08-30 | 郑州航空港区明港水务有限公司 | Unpowered biological treatment method for sewage with low C/N ratio |
-
2018
- 2018-09-20 CN CN201821540274.XU patent/CN210150897U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111847795A (en) * | 2020-07-31 | 2020-10-30 | 新疆中泰创新技术研究院有限责任公司 | System and method for recycling and treating PTA reclaimed water |
| CN114956487A (en) * | 2022-07-04 | 2022-08-30 | 郑州航空港区明港水务有限公司 | Unpowered biological treatment method for sewage with low C/N ratio |
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