CN220788319U - Domestic sewage modularization treatment equipment - Google Patents
Domestic sewage modularization treatment equipment Download PDFInfo
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- CN220788319U CN220788319U CN202322420895.1U CN202322420895U CN220788319U CN 220788319 U CN220788319 U CN 220788319U CN 202322420895 U CN202322420895 U CN 202322420895U CN 220788319 U CN220788319 U CN 220788319U
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model relates to a domestic sewage modularized treatment device, which comprises an oil separation unit, a treatment unit and a biological purification unit which are sequentially communicated, wherein the oil separation unit is provided with a water inlet pipe for inputting domestic sewage, and the biological purification unit is provided with a water outlet pipe for discharging the treated sewage; the biological purification unit is internally provided with a water purification plant layer, an activated carbon and fine sand layer, an iron filings layer and a haydite layer from top to bottom in sequence, and the layers are separated by a palm sheet. Compared with the prior art, the domestic sewage modularized treatment equipment provided by the utility model is provided with the oil separation unit, the treatment unit and the biological purification unit, firstly, oil stains in domestic sewage are separated and removed, then the sewage is treated in the treatment unit, finally, the sewage enters the biological purification unit, and the soil-plant-microorganism composite ecological system formed by the fillers such as ceramsite, fine sand, activated carbon, palm sheets, scrap iron and the like is used for further denitrification and dephosphorization, so that the advantages of the sewage are fully exerted, and the quality of the effluent and the running stability of the system are improved.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to domestic sewage modularized treatment equipment.
Background
Along with the rapid development of national economy and the continuous improvement of rural living standard, the discharge amount of rural living sewage is also continuously improved, and the main sources of the rural living sewage are washing, toilet flushing, kitchen sewage and the like, and the method has the characteristics of wide discharge range, dispersion, low pollution concentration, low treatment rate and the like, seriously pollutes the water environment in rural areas, and seriously threatens the water quality of drinking water, so that the method is an urgent problem for improving the current rural living environment by selecting a proper sewage treatment technology, enhancing the collection, treatment and discharge of the rural living sewage.
At present, the demand of rural decentralized sewage treatment modularized equipment is continuously increased, but the research of the technology is not mature at present, and most of sewage treatment integrated equipment seen on the market is directly evolved from a large-scale sewage plant technology and is not suitable for the treatment requirement of rural small-water-quantity sewage. In addition, the main stream technology of large-scale town domestic sewage treatment generally has the problems of high capital investment and operation cost, complex process, high management requirements and the like, thereby determining that rural domestic sewage treatment cannot simply take care of the existing technical method of town sewage treatment. Therefore, on the premise of ensuring that the rural sewage treatment emission standard is reached, the sewage treatment technology is improved, the construction investment, the operation cost and the complexity of operation management are reduced, and the method becomes the key of rural domestic sewage treatment technology application.
Disclosure of Invention
In view of the above, it is necessary to provide a modularized treatment device for domestic sewage, which is used for solving the technical problems of incomplete functions and poor sewage treatment effect of rural domestic sewage devices in the prior art.
The utility model provides a domestic sewage modularized treatment device, which comprises: the device comprises an oil separation unit, a treatment unit and a biological purification unit which are sequentially communicated, wherein the oil separation unit is provided with a water inlet pipe for inputting domestic sewage, and the biological purification unit is provided with a water outlet pipe for discharging the treated sewage; the biological purification unit is internally provided with a water purification plant layer, an activated carbon and fine sand layer, an iron filings layer and a haydite layer from top to bottom in sequence, and the layers are separated by a palm sheet.
Further, the oil separation unit further comprises a first tank body, a first partition plate, a first water passing pipe and a first water draining pipe, wherein the first partition plate is arranged in the first tank body to divide an inner cavity of the first tank body into an oil cavity and a water cavity, the water inlet pipe is communicated with the oil cavity, the first water draining pipe is communicated with the water cavity, the first water passing pipe is arranged transversely across the first partition plate, and a port of the first water passing pipe in the oil cavity is lower than a port of the first water passing pipe in the water cavity.
Further, the treatment unit comprises a second tank body, a second partition board, a second water passing pipe, a second drain pipe, an exhaust pipe, an aeration device and a filler part, wherein the two second partition boards are arranged in the second tank body to divide the inner cavity of the second tank body into an anaerobic cavity, an anoxic cavity and a clarification cavity; the aeration part of the aeration device is arranged in the anoxic cavity, and the filler part is arranged in the anoxic cavity.
Further, the aeration device comprises an air pump, an air pipe and a microporous aeration disc, the air pump is arranged outside the second tank body, the air pump is communicated with the microporous aeration disc through the air pipe, and the air pipe penetrates through the second tank body and is in sealing connection with the second tank body, and the microporous aeration disc is arranged in the anoxic cavity.
Further, the micropore aeration disc is arranged at the bottom of the anoxic cavity, and the filler part is arranged above the micropore aeration disc.
Further, the aeration device also comprises an inverted U-shaped porous filter plate, the microporous aeration disc is arranged below the porous filter plate, and the filler part is arranged on the porous filter plate.
Further, the packing portion includes packing bags arranged in a multi-bag stack, and the packing bags have a plurality of through holes.
Further, the processing unit further comprises a solar power generation device, and the solar power generation device is electrically connected with the air pump and is used for providing electric energy for the air pump.
Further, the biological purification unit comprises a third tank body, the water purification plant layer, the activated carbon, the fine sand layer, the scrap iron layer and the ceramsite layer are sequentially arranged in the third tank body from top to bottom, the water outlet end of the second drain pipe faces the water purification plant layer, the water inlet end of the water outlet pipe is arranged on the ceramsite layer, and the water outlet end of the water outlet pipe is positioned outside the third tank body.
Further, the biological purification unit still includes a plurality of breather pipes, and the upper end of breather pipe is located third cell body top, and its below runs through water purification plant layer, active carbon and fine sand layer, iron fillings layer in proper order and extends to the haydite layer, and the breather pipe lateral wall is formed with a plurality of gas pockets in order to communicate water purification plant layer, active carbon and fine sand layer, iron fillings layer and haydite layer.
Compared with the prior art, the domestic sewage modularized treatment equipment provided by the utility model is provided with the oil separation unit, the treatment unit and the biological purification unit, firstly, oil stains in domestic sewage are separated, then the sewage is treated in the treatment unit, finally, the sewage enters the biological purification unit, and the soil-plant-microorganism composite ecological system formed by the fillers such as ceramsite, fine sand, activated carbon, palm sheets and scrap iron is utilized for further denitrification and dephosphorization, so that the advantages of the sewage are fully exerted, the quality of effluent water and the running stability of the system are improved, and the palm sheets are adopted as organic fillers to provide the most basic nutrition for the survival of microorganisms, so that the microorganisms cannot be impacted due to the loss of an additional carbon source.
The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and its details set forth in the accompanying drawings. Specific embodiments of the present utility model are given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic view of an embodiment of a modular treatment apparatus for domestic sewage according to the present utility model;
FIG. 2 is a schematic diagram of the oil separating unit of FIG. 1;
FIG. 3 is a schematic diagram of the processing unit of FIG. 1;
fig. 4 is a schematic diagram of the biological purification unit of fig. 1.
Detailed Description
Preferred embodiments of the present utility model will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the utility model, and are not intended to limit the scope of the utility model.
Referring to fig. 1 and 4, the present utility model provides a modular treatment apparatus for domestic sewage. The domestic sewage modularized treatment equipment comprises an oil separation unit 1, a treatment unit 2 and a biological purification unit 3 which are communicated in sequence, wherein the oil separation unit 1 is provided with a water inlet pipe 11 for inputting domestic sewage, and the biological purification unit 3 is provided with a water outlet pipe 31 for discharging the treated sewage. The sewage flows through the oil separation unit 1, the treatment unit 2 and the biological purification unit 3 in sequence. The sewage may be driven to flow unidirectionally by forming a height difference by arranging the water inlet pipe 11 to be inclined or by making the water inlet pipe 11 to be higher than the water outlet pipe 31.
Wherein the biological purification unit 3 is provided with a water purification plant layer 32, an activated carbon and fine sand layer 33, an iron filings layer 34 and a haydite layer 35 from top to bottom in sequence, and the layers are separated by a palm sheet (not shown). Palm sheets are made of She Le fibers of palm trees. The soil-plant-microorganism composite ecological system formed by using the fillers such as ceramsite, fine sand, activated carbon, palm flakes, scrap iron and the like is further used for denitrification and dephosphorization, so that the advantages of the soil-plant-microorganism composite ecological system are fully exerted, and the quality of effluent and the stability of system operation are improved. The palm fiber is slender and tough, and can isolate the stuffing of the parts and prevent the mutual penetration of the parts. The palm sheet has the characteristics of strong pulling force, friction resistance, corrosion resistance, water wetting resistance and the like, can be used for a long time, reduces the replacement frequency, and is simple and environment-friendly. In addition, the palm sheet has lower cost and is easy to obtain. As a slow-release carbon, the palm sheet can not only continuously provide a carbon source for a biological filter, but also solve the problem of frequent maintenance and carbon source addition. The scrap iron can form internal electrolysis, and when the wastewater passes through the biological filter, electrochemical and physicochemical reactions can be carried out to oxidize organic matters in the wastewater and promote microorganisms to decompose the organic matters.
Referring to fig. 2, in some embodiments, the oil separation unit 1 further includes a first tank 12, a first partition 13, a first water passing pipe 14, and a first water discharging pipe 15. A first partition 13 is built into the first tank 12 to divide the inner cavity of the first tank 12 into an oil chamber 121 and a water chamber 122. The water inlet pipe 11 is communicated with the oil cavity 121, and the first water outlet pipe 15 is communicated with the water cavity 122. The first water conduit 14 is arranged across the first partition, the port of the first water conduit 14 located in the oil chamber 121 being lower than the port thereof located in the water chamber 122.
Domestic sewage firstly flows into the oil cavity 121 through the water inlet pipe 11 by the sewer pipe, oil dirt floats on the water surface because oil is lighter than water, and sewage at the lower layer flows into the water cavity 122 through the first water passing pipe 14, so that oil-water separation is realized. The first tank 12 may be provided in a sealed or open configuration, and when provided with an openable access door for periodic cleaning of greasy dirt or other solid waste. When the opening is adopted, a cover plate is preferably arranged to cover the opening, so that the leakage of malodorous gas is greatly reduced.
Referring to fig. 3, the treatment unit 2 includes a second tank 21, a second partition 22, a second water passing pipe 23, a second water discharging pipe 24, an air discharging pipe 25, an aeration device 26, and a packing 27. Two second baffles 22 are arranged in the second tank body 21 to divide the inner cavity of the second tank body 21 into an anaerobic cavity 211, an anoxic cavity 212 and a clarifying cavity 213. The first drain pipe 15 and the exhaust pipe 25 are communicated with the anaerobic chamber 211, and sewage in the water chamber 122 flows into the anaerobic chamber 211 through the first drain pipe 15. The exhaust pipe 25 is preferably connected to the top of the anaerobic chamber 211 and adopts a downward bent structure, or a rain cap is provided to prevent rainwater from flowing into the anaerobic chamber 211 through the exhaust pipe 25. The two second water passing pipes 23 are respectively arranged through the two second partition plates 22, and the water inlet end of the second water passing pipe 23 is lower than the water outlet end thereof, and sewage flows into the anoxic cavity 212 and the clarifying cavity 213 in sequence from the anaerobic cavity 211 in the second tank body 21 through the second water passing pipe 23. The second drain pipe 24 communicates with the clarification chamber 213 for draining treated wastewater. The aeration portion of the aeration device 26 is disposed within the anoxic chamber 212, and the filler portion 27 is also disposed within the anoxic chamber 212.
In the anaerobic chamber 211, organic matters precipitated at the bottom of the tank under anaerobic conditions are affected by acidic decay bacteria for a long time, and are gradually hydrolyzed and acidified to generate various organic acids, etc., and after partial sludge is hydrolyzed and acidified, the partial sludge can be continuously subjected to anaerobic digestion under an obligate bacteria environment to generate gases such as carbon dioxide, methane, etc., and the gases are discharged from the exhaust pipe 25. The organic matters with high molecules which are difficult to degrade in the sewage are converted into organic matters with low molecules which are easy to degrade, so that the biodegradability of the sewage is improved. At this stage, a large amount of sludge is biologically digested in large quantities, and the final sludge yield is greatly reduced.
The aeration device 26 is used for controllably introducing oxygen into the anoxic cavity 212, so that the anoxic cavity 212 forms an anoxic environment. The primary function of the anoxic chamber 212 is to remove nitrate nitrogen while removing a portion of the BOD. In the anoxic cavity 212, denitrifying bacteria utilize organic matters in the sewage as carbon sources, reduce NO2-, NO 3-in the inflow water into N2 to achieve denitrification, and degrade ammonia nitrogen values while removing the organic matters.
The sewage flows into the clarifying cavity 213, organic and inorganic small particles are further removed by precipitation, substances are precipitated by the principle of gravity, solid-liquid separation is realized, and the sewage enters the biological purifying unit 3 for advanced treatment.
In some embodiments, the aeration device 26 includes an air pump 261, an air pipe 262 and a microporous aeration disc 263, the air pump 261 is arranged outside the second tank body 21, the air pump 261 is communicated with the microporous aeration disc 263 through the air pipe 262, the air pipe 262 penetrates through the second tank body 21 and is in sealing connection with the second tank body 21, and the microporous aeration disc 263 is arranged in the anoxic cavity 212. Aeration device 26 may be controlled to provide the desired oxygen to the microorganisms within anoxic chamber 212.
In a preferred embodiment, a micro-porous aeration disc 263 is disposed at the bottom of the anoxic chamber 212 and a packing portion 27 is disposed on the micro-porous aeration disc 263. Bubbles generated by the microporous aeration disc 263 can pass through the whole packing part 27 from bottom to top, so that microorganisms in each part of the packing part 27 can receive oxygen. The aeration device 3 preferably further includes an inverted U-shaped perforated filter plate 264, and the microporous aeration disks 263 are disposed below the perforated filter plate 264, and the packing sections 27 are disposed on the perforated filter plate 264. The packing portion 27 is spaced apart from the microporous aeration disks 263 to facilitate smooth escape of gas so that the dissolved oxygen content in the anoxic chamber 212 is greater than 27mg/L.
In some embodiments, the packing portion 27 includes packing bags arranged in a stack of a plurality of bags, the packing bags having a plurality of through holes, and various packing materials are contained inside. The filler can be selected from bamboo charcoal, straw, coconut shell, rotten wood, etc., and can maintain the carbon nitrogen ratio in the pool and the high activity of microorganisms. The filler adopts nylon mesh bags for subpackaging, so that the subsequent filler replacement is facilitated, and the height of the whole filler layer needs to be half of that of the anoxic cavity 212. The bamboo charcoal is a product of bamboo material through high-temperature combustion decomposition, has a porous structure, is similar to sponge, can adsorb toxic and harmful chemical substances in sewage, has abundant pore distribution characteristics and high specific surface area on the surface, and provides good conditions for microorganism adhesion. Is favorable for the reproduction of microorganisms and the formation of biological films, and the nylon net bags are used for packing, so that the packing is not easy to block and is convenient to replace.
The combined process of anaerobic and anoxic is used to fluidize and reduce solid matters as much as possible, so as to greatly reduce the possibility of blocking. The anaerobic and anoxic treatment processes are connected in series, and the anaerobic treatment process has a series of advantages of investment saving, energy saving, low sludge yield, good inflow water quality, denitrification and dephosphorization capability, good operation stability and the like.
In some embodiments, the air pump 261 may be powered by an external power source. In other embodiments, when it is inconvenient to connect to an external power source, a solar power generation device 28 may be further provided, and the solar power generation device 28 is electrically connected to the air pump 261 to supply electric power thereto. The solar power generation device 28 generally comprises a solar panel and a storage battery, wherein the solar panel is fixedly arranged on the second tank body 21 and is electrically connected with the storage battery, and the storage battery is electrically connected with the air pump 261 to supply power to the storage battery.
In some embodiments the second tank 21 is provided with a sealing cover 29 on top of the anaerobic chamber 211, anoxic chamber 212 and clarification chamber 213. The sealing cover 29 is normally closed when sewage is treated, and the sealing cover 29 is opened for people to enter into operation when cleaning, dredging or overhauling is needed.
The sewage treated by the combined process of anaerobic and anoxic processes of the anaerobic cavity 211 and the anoxic cavity 212 flows into the clarifying cavity 213, and further precipitates and removes organic and inorganic small particles and the like, and substances are precipitated due to the principle of gravity, so that solid-liquid separation is realized. And then flows into the biological purification unit 3 through the second drain pipe 24.
Referring to fig. 4, the biological purification unit 3 includes a third tank 36, a water purification plant layer 32, an activated carbon and fine sand layer 33, an iron filings layer 34 and a ceramic granule layer 35 sequentially arranged in the third tank 36 from top to bottom, a water outlet end of the second water drain pipe 24 faces the water purification plant layer 32, a water inlet end of the water outlet pipe 31 is arranged in the ceramic granule layer 35, and a water outlet end thereof is positioned outside the third tank. The water purifying plant layer 32 can be planted by combining canna, iris, cress, shallot, reed and the like, so that the sewage treatment effect is improved.
In some embodiments, the biological purification unit 3 further includes a plurality of ventilation pipes 37, the upper ends of the ventilation pipes 37 are located above the third tank 36, the lower parts of the ventilation pipes sequentially penetrate through the water purification plant layer 32, the activated carbon and fine sand layer 33 and the scrap iron layer 34 and extend to the ceramic particle layer 35, a plurality of air holes are formed in the side walls of the ventilation pipes 37 to communicate the water purification plant layer 32, the activated carbon and fine sand layer 33, the scrap iron layer 34 and the ceramic particle layer 35, sufficient oxygen is provided for growth and propagation of microorganisms, and degradation of organic pollutants is facilitated.
The modularized treatment equipment for domestic sewage provided by the utility model has the advantages of simple structure, small excavation amount, simplicity, convenience and rapidness in installation, no influence of terrain and water quantity changes, and strong impact load resistance. The combined process of anaerobic and anoxic is adopted, so that solid matters are fluidized and reduced as much as possible, the blocking possibility is greatly reduced, the process mainly takes anaerobic as a main part, and the problems of easy expansion, complex operation management and the like of activated sludge are solved. The anaerobic and anoxic treatment processes are connected in series, and the anaerobic treatment process has a series of advantages of investment saving, energy saving, low sludge yield, good inflow water quality, denitrification and dephosphorization capability, good operation stability and the like. The biological purification unit 3 further performs denitrification and dephosphorization through a soil-plant (filler) -microorganism composite ecological system, so that the quality of effluent water and the running stability of the system are improved. The sewage treated by the integrated device can meet the first-level B discharge standard requirement of the Integrated wastewater discharge Standard (GB 8978).
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (10)
1. A modular treatment apparatus for domestic sewage, comprising: the sewage treatment device comprises an oil separation unit, a treatment unit and a biological purification unit which are sequentially communicated, wherein the oil separation unit is provided with a water inlet pipe for inputting domestic sewage, and the biological purification unit is provided with a water outlet pipe for discharging the treated sewage; the biological purification unit is internally provided with a water purification plant layer, an activated carbon and fine sand layer, an iron filings layer and a ceramsite layer from top to bottom in sequence, and the layers are separated by a palm sheet.
2. The domestic sewage modular treatment apparatus of claim 1, wherein the oil separation unit further comprises a first tank body, a first partition plate, a first water passing pipe and a first water discharging pipe, the first partition plate is arranged in the first tank body to divide an inner cavity of the first tank body into an oil cavity and a water cavity, the water inlet pipe is communicated with the oil cavity, the first water discharging pipe is communicated with the water cavity, the first water passing pipe is arranged transversely across the first partition plate, and a port of the first water passing pipe in the oil cavity is lower than a port of the first water passing pipe in the water cavity.
3. The domestic sewage modularized treatment equipment according to claim 2, wherein the treatment unit comprises a second tank body, a second partition board, a second water passing pipe, a second drain pipe, an exhaust pipe, an aeration device and a filler part, wherein two second partition boards are arranged in the second tank body to divide the inner cavity of the second tank body into an anaerobic cavity, an anoxic cavity and a clarification cavity, the first drain pipe and the exhaust pipe are communicated with the anaerobic cavity, two second water passing pipes are respectively arranged through the two second partition boards, the water inlet end of the second water passing pipe is lower than the water outlet end of the second water passing pipe, and the second drain pipe is communicated with the clarification cavity; the aeration portion of the aeration device is arranged in the anoxic cavity, and the filler portion is arranged in the anoxic cavity.
4. A domestic sewage modular treatment apparatus according to claim 3, wherein the aeration device comprises an air pump, an air pipe and a microporous aeration disc, the air pump is arranged outside the second tank body, the air pump is communicated with the microporous aeration disc through the air pipe, the air pipe penetrates through the second tank body and is in sealing connection with the second tank body, and the microporous aeration disc is arranged in the anoxic cavity.
5. The domestic sewage modular processing apparatus of claim 4, wherein the microporous aeration disc is arranged at the bottom of the anoxic cavity, and the filler portion is arranged above the microporous aeration disc.
6. The domestic sewage modular processing apparatus of claim 5, wherein the aeration device further comprises an inverted U-shaped perforated filter plate, the microporous aeration disc being disposed below the perforated filter plate, the filler portion being disposed on the perforated filter plate.
7. A domestic sewage modular treatment apparatus according to claim 3, wherein the packing portion comprises a packing bag in a multi-bag stacked arrangement, the packing bag having a plurality of through holes.
8. The domestic sewage modular processing apparatus of claim 4, wherein the processing unit further comprises a solar power generation device electrically connected to the air pump for providing electrical power thereto.
9. The domestic sewage modular treatment apparatus according to claim 3, wherein the biological purification unit comprises a third tank body, the water purification plant layer, the activated carbon and fine sand layer, the scrap iron layer and the ceramic grain layer are sequentially arranged in the third tank body from top to bottom, the water outlet end of the second drain pipe faces the water purification plant layer, the water inlet end of the water outlet pipe is arranged in the ceramic grain layer, and the water outlet end of the water outlet pipe is positioned outside the third tank body.
10. The domestic sewage modular treatment apparatus according to claim 9, wherein the biological purification unit further comprises a plurality of ventilation pipes, the upper ends of the ventilation pipes are located above the third tank body, the lower parts of the ventilation pipes sequentially penetrate through the water purification plant layer, the activated carbon and fine sand layer, the scrap iron layer and extend to the ceramsite layer, and a plurality of air holes are formed in the side walls of the ventilation pipes so as to be communicated with the water purification plant layer, the activated carbon and fine sand layer, the scrap iron layer and the ceramsite layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322420895.1U CN220788319U (en) | 2023-09-06 | 2023-09-06 | Domestic sewage modularization treatment equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322420895.1U CN220788319U (en) | 2023-09-06 | 2023-09-06 | Domestic sewage modularization treatment equipment |
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| CN220788319U true CN220788319U (en) | 2024-04-16 |
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| CN202322420895.1U Active CN220788319U (en) | 2023-09-06 | 2023-09-06 | Domestic sewage modularization treatment equipment |
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