CN112142260A - Treatment system and method for decentralized sewage - Google Patents
Treatment system and method for decentralized sewage Download PDFInfo
- Publication number
- CN112142260A CN112142260A CN202011032068.XA CN202011032068A CN112142260A CN 112142260 A CN112142260 A CN 112142260A CN 202011032068 A CN202011032068 A CN 202011032068A CN 112142260 A CN112142260 A CN 112142260A
- Authority
- CN
- China
- Prior art keywords
- sewage
- tank
- buffer tank
- communicated
- water outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000011593 sulfur Substances 0.000 claims abstract description 37
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 37
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 13
- 230000001651 autotrophic effect Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 11
- 244000005700 microbiome Species 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 8
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 7
- 238000004065 wastewater treatment Methods 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 241000894006 Bacteria Species 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 19
- 238000012423 maintenance Methods 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000005273 aeration Methods 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- 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
Abstract
The invention discloses a treatment system and a method for decentralized sewage, which comprises a grid, a first buffer tank, a second buffer tank, a sulfur denitrification filter tank, an ultraviolet disinfection tank and a biological filter tower, wherein the grid, the first buffer tank, the second buffer tank, the sulfur denitrification filter tank and the ultraviolet disinfection tank are sequentially communicated from a water inlet end to a water outlet end; the biological filter tower is positioned above the first buffer tank and communicated with the first buffer tank; the sewage is communicated with a water inlet at the lower part of the first buffer tank through a grid, a water outlet at the upper part of the first buffer tank is communicated with a water inlet at the upper part of the biological filter tower, a water outlet at the lower part of the biological filter tower is communicated with a water inlet at the lower part of the first buffer tank, a water outlet at the upper part of the first buffer tank is communicated with a water inlet at the lower part of the second buffer tank, a water outlet at the upper part of the second buffer tank is communicated with a water inlet at the lower part of; the invention has the advantages of simple process flow, reasonable design, small quantity of process units, stable treated effluent, small operation and maintenance workload, small occupied area and suitability for small-sized sewage treatment stations.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a treatment system and method for decentralized sewage.
Background
Under the propulsion of ten items of water, the urban sewage treatment rate needs to reach 95% in 2020, and centralized sewage is basically effectively controlled. However, the areas which are not covered in the urban municipal pipe network coverage area and are located in suburbs or far away from towns, such as vacation villages, villas far away from city centers, scattered villages and towns, and the like, are not suitable for the centralized treatment of domestic sewage due to the characteristics of small sewage amount, scattered production sources, large pollution amount and the like, and the generated sewage is not effectively treated, so that the environmental problems are increasingly highlighted. According to the planning, the sewage treatment rate of villages and towns in China is still lower than 30%, even less than 10% in most areas, so that distributed and on-site treatment technologies of domestic sewage are selected and developed according to local conditions.
In recent years, distributed sewage treatment technology is emerging continuously, but certain problems still exist in the aspects of process selection, investment and operation construction. Most treatment processes lack pertinence, are copied by referring to a centralized sewage treatment method, have the problems of complex process flow, more equipment facilities, high system power consumption and high investment and operation cost, and are not suitable for distributed sewage treatment facilities. Meanwhile, the amount of the residual sludge is large, and the problem of secondary pollution is not negligible. The main process characteristics of the biological filter tower are that the load which can be born is high, the biofilm grows rapidly under the high organic matter load, and the high hydraulic load is that the biofilm is subjected to strong hydraulic scouring, so that the biofilm is continuously fallen and updated; the tower biological filter occupies small area and has stronger impact load resistance due to the layering of the filter. Generally, a natural ventilation mode is adopted, and aeration equipment is not required. The biological filtration tower has the advantages of removing COD and ammonia nitrogen, but has the defect of poor denitrification capability.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a treatment system and a treatment method for dispersed sewage, which have the advantages of simple process flow, small number of process units, reasonable design, low energy consumption, less sludge, no need of aeration, no need of adding medicaments, small occupied area, suitability for small-sized sewage treatment stations, stable treated effluent, small operation and maintenance workload and low operation cost.
In order to achieve the aim, the treatment system and the method for the dispersed sewage provided by the invention comprise a grid, a buffer tank, a sulfur denitrification filter tank, an ultraviolet disinfection tank and a biological filter tower which are sequentially communicated from a water inlet end to a water outlet end; the biological filter tower is positioned above the first buffer tank and communicated with the first buffer tank.
Preferably, the sewage is communicated with a water inlet at the lower part of the first buffer tank through the grille, a water outlet at the upper part of the first buffer tank is communicated with a water inlet at the upper part of the biological filter tower, a water outlet at the lower part of the biological filter tower is communicated with a water inlet at the lower part of the first buffer tank, a water outlet at the upper part of the first buffer tank is communicated with a water inlet at the lower part of the second buffer tank, a water outlet at the upper part of the second buffer tank is communicated with a water inlet at the lower part of the sulfur denitrification filter tank, a water outlet at the upper part of the sulfur denitrification;
preferably, the grating is a grating plate or a grating pool arranged at the water inlet end of the first buffer pool;
preferably, the carrier of the biological filter tower is made of nano ceramic materials with the surfaces attached with aerobic microorganisms and anaerobic microorganisms;
preferably, the filling filter material in the sulfur autotrophic denitrification filter is a circular hard filter material which is attached with sulfur autotrophic denitrifying bacteria on the surface and contains sulfur simple substances;
preferably, a sewage pump is arranged in each of the first buffer pool and the second buffer pool;
a bulk sewage treatment method comprises the following steps:
s1, enabling sewage to automatically flow into a water inlet of the grating, intercepting the sewage by the grating, and automatically flowing into a first buffer pool from a water outlet of the grating;
s2, lifting the sewage in the first buffer pool to a biological filter tower through a sewage pump of the first buffer pool, and enabling the sewage after biological reaction to flow back to the first buffer pool through a water outlet of the biological filter tower;
s3, the sewage which flows back to the first buffer pool enters a second buffer pool through a water outlet of the first buffer pool, and is lifted to the sulfur autotrophic denitrification biological filter through a sewage pump of the second buffer pool to remove nitrate nitrogen in the sewage;
s4, the sewage flowing through the sulfur autotrophic denitrification biological filter enters an ultraviolet disinfection tank, and is discharged from a water outlet of the ultraviolet disinfection tank after being sterilized and disinfected.
The treatment system and the treatment method for the dispersive sewage provided by the invention have the following beneficial effects:
the invention effectively avoids the technical problems of complex process flow, more equipment and facilities, large system power consumption and high investment and operation cost in the prior art, has strong pertinence by combining the biological filtration tower and the sulfur autotrophic denitrification tank, can make up the deficiency of the biological filtration tower in denitrification by using sulfur as an electron donor in the process of denitrification in the sulfur autotrophic denitrification tank, has cheap sulfur and high sulfur component content, has operation cost far lower than that of adding an organic carbon source, and is suitable for denitrification treatment of sewage with low COD and high nitrate nitrogen. The invention has the advantages of simple process flow, reasonable design, small quantity of process units, stable treated water, simple operation and maintenance, small workload, low operation cost, low sludge production, no need of aeration facilities and medicament adding devices, small occupied area and suitability for small-sized sewage treatment stations.
Drawings
FIG. 1 is a process flow diagram of a decentralized wastewater treatment system according to the present invention.
Detailed Description
The present invention will be further described with reference to the following specific embodiments and accompanying drawings to assist in understanding the contents of the invention.
As shown in fig. 1, the treatment system for decentralized wastewater provided by the present invention comprises a grid, a buffer tank, a sulfur denitrification filter, an ultraviolet disinfection tank, and a biological filtration tower, which are sequentially connected from a water inlet end to a water outlet end; the grid is for setting up in the grid board or the grid pond of the end of intaking of buffer pool one, and the buffer pool includes buffer pool one and buffer pool two that communicate in proper order from the end of intaking to the end of play water, all is equipped with the sewage pump in buffer pool one and the buffer pool two, and biological filter tower is located buffer pool one top and is linked together with buffer pool one. The sewage is communicated with a water inlet at the lower part of the first buffer tank through a grid, a water outlet at the upper part of the first buffer tank is communicated with a water inlet at the upper part of the biological filter tower, and the biological filter tower mainly has the function of removing organic carbon, ammonia nitrogen and total phosphorus. The biological filter tower adopts natural ventilation, and the biological reaction generates heat to form air convection, thereby increasing the supply of dissolved oxygen. And pumping the sewage in the first buffer tank to a water inlet at the upper part of the biological filter tower by using a sewage pump, and uniformly spraying the sewage on a carrier in the filter tower through a nozzle. The carrier of the biological filter tower is made of nano ceramic materials, is folded and hung vertically and serves as a carrier for culturing a biological membrane, and aerobic microorganisms and anaerobic microorganisms are attached to the surface of the carrier simultaneously. In the water flow spraying process, oxygen is dissolved in the water flow, and the water flow is contacted with microorganisms on the carrier, so that the effect of removing organic carbon, ammonia nitrogen and total phosphorus in the sewage is achieved through biological reaction. The water outlet at the lower part of the biological filter tower is communicated with the water inlet at the lower part of the first buffer tank, the water outlet at the upper part of the first buffer tank is communicated with the water inlet at the lower part of the second buffer tank, the water outlet at the upper part of the second buffer tank is communicated with the water inlet at the lower part of the sulfur denitrification filter tank, and the sulfur denitrification filter tank has the main functions of denitrification, removal of nitrate nitrogen in water and standard reaching of total nitrogen. The sulfur autotrophic denitrification filter is internally filled with a round hard filter material with the surface containing sulfur elementary substances, sulfur autotrophic denitrification bacteria are attached to the surface of the filter material, nitrate nitrogen in sewage can be removed by using the sulfur elementary substances in the filter material, and the sewage passes through the filter material from bottom to top and contacts with microorganisms attached to the surface of the filter material, so that the sewage is treated. The water outlet at the upper part of the sulfur denitrification filter tank is communicated with the water inlet of the ultraviolet disinfection tank, and the water outlet of the ultraviolet disinfection tank is communicated with the water outlet component.
The invention provides a bulk sewage treatment method, which comprises the following steps:
s1, sewage automatically flows into a water inlet of the grating, is intercepted by the grating, and then pollutants with large particle size are removed, so that subsequent facilities are prevented from being blocked, and the sewage automatically flows into a first buffer pool from a water outlet of the grating;
and S2, lifting the sewage in the first buffer tank to a water inlet at the upper part of the biological filter tower through a sewage pump of the first buffer tank, uniformly spraying the sewage on a carrier in the filter tower through a nozzle, folding and hanging the carrier of the biological filter tower which is made of nano ceramic materials to serve as a carrier for biofilm culture, and simultaneously attaching aerobic and anaerobic microorganisms to the surface of the carrier. In the water flow spraying process, oxygen is dissolved in the water flow and is contacted with microorganisms on the carrier, the effect of removing organic carbon, ammonia nitrogen and total phosphorus in the sewage is achieved through biological reaction, and the sewage after the biological reaction flows back to the first buffer tank through a water outlet of the biological filter tower;
s3, the sewage which flows back to the first buffer pool enters a second buffer pool through a water outlet of the first buffer pool, the sewage is lifted to a water inlet at the lower part of the sulfur autotrophic denitrification biological filter through a sewage pump of the second buffer pool, the sewage passes through a filter material from bottom to top and contacts with microorganisms attached to the surface of the filter material, and nitrate nitrogen in the sewage is removed;
s4, the sewage flowing through the sulfur autotrophic denitrification biological filter enters an ultraviolet disinfection tank, and is discharged from a water outlet of the ultraviolet disinfection tank after being sterilized and disinfected.
The invention effectively avoids the technical problems of complex process flow, more equipment and facilities, large system power consumption and high investment and operation cost in the prior art, has strong pertinence by combining the biological filtration tower and the sulfur autotrophic denitrification tank, can make up the deficiency of the biological filtration tower in denitrification by using sulfur as an electron donor in the process of denitrification in the sulfur autotrophic denitrification tank, has cheap sulfur and high sulfur component content, has operation cost far lower than that of adding an organic carbon source, and is suitable for denitrification treatment of sewage with low COD and high nitrate nitrogen. The invention has the advantages of simple process flow, reasonable design, small quantity of process units, stable treated water, simple operation and maintenance, small workload, low operation cost, low sludge production, no need of aeration facilities and medicament adding devices, small occupied area and suitability for small-sized sewage treatment stations.
The inventive concept is explained in detail herein using specific examples, which are given only to aid in understanding the core concepts of the invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are included in the scope of the present invention.
Claims (7)
1. A treatment system of decentralized sewage is characterized by comprising a grid, a buffer tank, a sulfur denitrification filter tank, an ultraviolet disinfection tank and a biological filter tower which are sequentially communicated from a water inlet end to a water outlet end; the biological filter tower is positioned above the first buffer tank and communicated with the first buffer tank.
2. The system for treating dispersed sewage according to claim 1, wherein the sewage is communicated with the water inlet at the lower part of the first buffer tank through the grille, the water outlet at the upper part of the first buffer tank is communicated with the water inlet at the upper part of the biological filtration tower, the water outlet at the lower part of the biological filtration tower is communicated with the water inlet at the lower part of the first buffer tank, the water outlet at the upper part of the first buffer tank is communicated with the water inlet at the lower part of the second buffer tank, the water outlet at the upper part of the second buffer tank is communicated with the water inlet at the lower part of the sulfur denitrification filter tank, the water outlet at the upper part of the sulfur denitrification filter tank is communicated with the.
3. The decentralized wastewater treatment system according to claim 2, wherein the grid is a grid plate or a grid basin disposed at the water inlet end of the first buffer basin.
4. The decentralized wastewater treatment system according to claim 2, wherein the carrier of the biological filter tower is made of nano ceramic material with aerobic microorganisms and anaerobic microorganisms attached to the surface.
5. The decentralized wastewater treatment system according to claim 2, wherein the filler filter material in the sulfur autotrophic denitrification filter is a circular hard filter material containing elemental sulfur, the surface of which is attached with sulfur autotrophic denitrifying bacteria.
6. The decentralized wastewater treatment system according to claim 2, wherein a wastewater pump is disposed in each of the first buffer tank and the second buffer tank.
7. The method for treating loose sewage according to claim 1, comprising the steps of:
s1, enabling sewage to automatically flow into a water inlet of the grating, intercepting the sewage by the grating, and automatically flowing into a first buffer pool from a water outlet of the grating;
s2, lifting the sewage in the first buffer pool to a biological filter tower through a sewage pump of the first buffer pool, and enabling the sewage after biological reaction to flow back to the first buffer pool through a water outlet of the biological filter tower;
s3, the sewage which flows back to the first buffer pool enters a second buffer pool through a water outlet of the first buffer pool, and is lifted to the sulfur autotrophic denitrification biological filter through a sewage pump of the second buffer pool to remove nitrate nitrogen in the sewage;
s4, the sewage flowing through the sulfur autotrophic denitrification biological filter enters an ultraviolet disinfection tank, and is discharged from a water outlet of the ultraviolet disinfection tank after being sterilized and disinfected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011032068.XA CN112142260A (en) | 2020-09-27 | 2020-09-27 | Treatment system and method for decentralized sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011032068.XA CN112142260A (en) | 2020-09-27 | 2020-09-27 | Treatment system and method for decentralized sewage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112142260A true CN112142260A (en) | 2020-12-29 |
Family
ID=73894790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011032068.XA Pending CN112142260A (en) | 2020-09-27 | 2020-09-27 | Treatment system and method for decentralized sewage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112142260A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259351A (en) * | 2022-09-29 | 2022-11-01 | 山东国一中永环保技术服务有限公司 | Nano ceramic-micro-oxysulfide-coupled double-membrane-tower sewage treatment system |
-
2020
- 2020-09-27 CN CN202011032068.XA patent/CN112142260A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259351A (en) * | 2022-09-29 | 2022-11-01 | 山东国一中永环保技术服务有限公司 | Nano ceramic-micro-oxysulfide-coupled double-membrane-tower sewage treatment system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106242190A (en) | A kind of modularity sewage disposal system | |
| CN206143010U (en) | Modularized sewage treatment system | |
| CN102531187B (en) | Method for treating domestic wastewater with combined laminated vertical flow-horizontal subsurface flow wetland | |
| CN107879472B (en) | Sewage treatment device and method | |
| CN108503136A (en) | River regulation system | |
| CN108083437A (en) | A kind of rural domestic sewage treating device and treatment process | |
| CN102874926A (en) | System and method for treating sewage by using unpowered oxygen-supply ecological filter | |
| CN103159380A (en) | Zero-energy-consumption sewage treatment system and method for constructed wetlands | |
| CN111484206A (en) | Natural environment simulation biological sewage treatment system | |
| CN108249691B (en) | Integrated low-energy-consumption distributed village and town domestic sewage treatment system | |
| CN216890553U (en) | Constructed wetland sewage treatment system for treating rural sewage | |
| CN111925077A (en) | Distributed domestic sewage integrated treatment system and process | |
| CN203187497U (en) | Zero-energy-consumption artificial wetland sewage treatment system | |
| CN104355490A (en) | Device and method for removing pollutants in rural domestic sewage | |
| CN207845268U (en) | A kind of rural domestic sewage treating device | |
| CN109879546A (en) | A kind of dispersant type domestic wastewater processing system and treatment process | |
| CN214142004U (en) | Treatment system of decentralized sewage | |
| CN106517677B (en) | Quality of reclaimed water landscape water body keeps structure | |
| CN112142260A (en) | Treatment system and method for decentralized sewage | |
| CN210117318U (en) | Intelligent deep water treatment integrated system | |
| CN110713315A (en) | Special sewage treatment device for sewage plant in villages and towns and treatment method thereof | |
| CN111018240A (en) | Rural domestic sewage treatment system who contains biological trickling filter | |
| CN207760198U (en) | A kind of sewage disposal system | |
| CN105693036A (en) | Intelligent sewage treatment system | |
| CN210796140U (en) | Domestic sewage treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |