CN114956478A - Rural domestic sewage overall treatment system and utilization method thereof - Google Patents
Rural domestic sewage overall treatment system and utilization method thereof Download PDFInfo
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- CN114956478A CN114956478A CN202210696842.XA CN202210696842A CN114956478A CN 114956478 A CN114956478 A CN 114956478A CN 202210696842 A CN202210696842 A CN 202210696842A CN 114956478 A CN114956478 A CN 114956478A
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- 239000010865 sewage Substances 0.000 title claims abstract description 83
- 238000011282 treatment Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003647 oxidation Effects 0.000 claims abstract description 43
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 230000002262 irrigation Effects 0.000 claims abstract description 34
- 238000003973 irrigation Methods 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000000926 separation method Methods 0.000 claims abstract description 24
- 239000007787 solid Substances 0.000 claims abstract description 15
- 238000007667 floating Methods 0.000 claims abstract description 7
- 241001464837 Viridiplantae Species 0.000 claims abstract description 5
- 238000000855 fermentation Methods 0.000 claims description 19
- 230000004151 fermentation Effects 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 17
- 239000002910 solid waste Substances 0.000 claims description 12
- 244000005700 microbiome Species 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 7
- 239000003895 organic fertilizer Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000000813 microbial effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 235000016709 nutrition Nutrition 0.000 claims description 3
- 230000035764 nutrition Effects 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 9
- 230000007774 longterm Effects 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 235000015097 nutrients Nutrition 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000003337 fertilizer Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 230000000593 degrading effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000005445 natural material Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000002049 effect on nutrition Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000010794 food waste Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011221 initial treatment Methods 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
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
-
- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- 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
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a rural domestic sewage overall planning treatment system and a utilization method thereof, wherein the rural domestic sewage overall planning treatment system comprises an irrigation farmland, a plurality of separation modules, a solid treatment module and a liquid treatment module, the separation modules are connected with the irrigation farmland through the solid treatment module and the liquid treatment module, the separation modules are connected with the liquid treatment module through a sewage discharge pipe, the liquid treatment module is connected with the irrigation farmland through a pipeline, and the liquid treatment module comprises an oxidation pond, an ecological floating island, landscape green plants, an irrigation channel, a booster pump and a return pipe; the rural domestic sewage overall treatment system and the utilization method thereof have the advantages that the investment cost is low, no professional is needed for long-term operation and maintenance, the later operation and maintenance difficulty and cost are low, and waste utilization and water resource recycling are realized; the system and the method conform to the actual current situation of the rural area, solve the problem of treatment of rural domestic sewage, save water resources, plant emergent landscape plants in the transformed pond and beautify the living environment of the rural area.
Description
Technical Field
The invention relates to the technical field of water purification, in particular to a rural domestic sewage overall treatment system and a utilization method thereof.
Background
In the current rural domestic sewage treatment project, a new town sewage treatment plant is mainly used, and the problems that the rural sewage treatment rate of part of regions is low and the regions are difficult to be brought into a municipal pipe network are solved by newly building a small rural domestic sewage treatment plant.
After the sewage treatment plants are built in part of regions, sewage pipe networks are built without subsequent capital, so that the waste of facilities is caused. The sewage treatment plant is a place which needs long-term maintenance of professional technicians, and sewage treatment personnel in vast rural areas are short, so that a plurality of sewage treatment plants are maintained without technicians.
Rural domestic sewage treatment is not only a technical problem, in other words, the technical problem of how to treat the domestic sewage to reach the standard cannot be considered, and the treatment is comprehensively considered and solved according to some series problems of actual economy, land, operation and maintenance, talents and the like in rural areas. The treatment and the reutilization of rural domestic sewage are considered comprehensively, and the method is a good strategy for solving the contradiction of sewage treatment in rural areas in China at the present stage.
In conclusion, the existing rural domestic sewage treatment has the following problems:
1. the investment is huge, the construction cost of newly-built rural domestic sewage treatment plants is huge, the cost of manual, electric power, medicament and sludge treatment of a matched pipe network and later operation and maintenance is very high, and many rural areas are difficult to support.
2. The sewage treatment plant needs to be maintained for a long time by professional technicians, the sewage treatment plant is a unit with high degree of specialization, and in many rural areas, the professional technicians do not maintain the sewage treatment plant for a long time at all, so that the waste water of the sewage treatment plant which is built by spending a large amount of capital is wasted, or the design index is not reached.
3. The water resource is wasted, and the treated sewage is discharged to a river channel, so that the sewage discharge must execute strict drainage standards, and the nutrient substances in the sewage must be reduced to be discharged. In fact, organic matters, nitrogen and phosphorus in the sewage are just the nutrient substances needed by plants and crops. A great deal of financial resources are spent on nutrient substances, but the nutrient substances cannot be utilized in vast farmlands, and the nutrient substances are wasted on water resources.
Disclosure of Invention
In order to solve the technical problems, a rural domestic sewage overall treatment system and a utilization method thereof are provided.
In order to achieve the above purpose, the following scheme is provided: the utility model provides a rural domestic sewage overall planning processing system, is including irrigating farmland, a plurality of separation module, solid processing module and liquid processing module, be connected through solid processing module and liquid processing module between separation module and the irrigation farmland, separation module and liquid processing module pass through the blow off union coupling, and liquid processing module passes through the pipe connection with the irrigation farmland, liquid processing module includes that oxidation pond, ecological chinampa, the green planting of view, irrigation channel, booster pump and back flow, separation module passes through the blow off pipe and is connected with the oxidation pond, and biochemical pond department is provided with the green planting of ecological chinampa and view, and the bottom of ecological chinampa is provided with a plurality of bio-carrier fillers, is connected through irrigation channel and back flow between oxidation pond and the irrigation farmland, and irrigation channel department is provided with the booster pump, be provided with the valve on the back flow.
Further, the separation module is a filter.
Further, the solid treatment module is a fermentation tank.
A utilization method for a rural domestic sewage overall treatment system, which comprises the following steps,
s1, discharging the rural domestic sewage into a filter, carrying out solid-liquid separation on the domestic sewage by the filter, transmitting the separated liquid into an oxidation pond through a sewage pipe, and transporting the solid waste separated from the filter into a fermentation tank for fermentation;
s2, planting landscape green plants in the oxidation pond, and adding a microbial agent to the biological carrier filler at the bottom of the ecological floating island to generate a large amount of microorganisms for purifying water quality;
s3, delivering the purified water in the oxidation pond to an irrigation farmland through a booster pump and an irrigation channel, and irrigating the farmland;
s4, fermenting the solid waste in the fermentation tank to form an organic fertilizer, and applying the organic fertilizer to irrigated farmlands to provide growth nutrition for crops;
and S5, when the water quantity in the irrigated farmland is excessive, the water flows back to the oxidation pond through a return pipe to store water.
The invention has the advantages that:
1. the rural domestic sewage overall treatment system and the utilization method thereof have low investment cost, the rural domestic sewage is primarily treated by adopting the simple filter, and the rural pit pond is reused to form the oxidation pond to carry out secondary treatment on the sewage, so that the overall investment cost is low.
2. The filter and the improved reinforced oxidation pond in the system and the method do not need long-term operation and maintenance of professionals, only landscape plants in the oxidation pond need to be harvested regularly, and the later-stage operation and maintenance technology is low in difficulty and cost.
3. The system and the method comprehensively treat and comprehensively utilize the sewage and the solid waste in the rural domestic sewage, finally change the sewage and the solid waste into crop fertilizer to continuously participate in natural substance circulation, and realize waste utilization and water resource recycling;
4. the system and the method conform to the actual current situation of the rural area, a plurality of abandoned ponds and irrigation channels in the rural area are reused to form a large circulation for treating and utilizing the rural domestic sewage, the treatment problem of the rural domestic sewage is solved, the water resource is saved, emergent landscape plants are planted in the improved ponds, and the living environment of the rural area is beautified.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Reference numerals in the drawings of the specification include:
1. the system comprises a filter, 2. a blow-off pipe, 3. an oxidation pond, 4. landscape green plants, 5. an ecological floating island, 6. an irrigation channel, 7. a booster pump, 8. a return pipe, 9. a valve, 10. an irrigation farmland and 11. a fermentation tank.
Detailed Description
The following is further detailed by the specific embodiments:
as shown in fig. 1:
irrigating a farmland 10 to plant crops, installing a separation module at a sewage discharge system of each family in rural areas for solid-liquid separation of rural domestic sewage, treating solid waste of the domestic sewage by using a solid treatment module, conveying sewage in the separation module into a liquid treatment module through a sewage discharge pipe 2, and treating wastewater by using the liquid treatment module; the oxidation pond 3 is used for treating and purifying sewage through microorganisms and landscape plants, the ecological floating island 5 is used for installing biological carrier filler, so that the microorganisms added in the oxidation pond 3 can be attached to the biological carrier filler, the loss of the microorganisms caused by water flow is reduced, the irrigation channel 6 and the return pipe 8 enable a waterway circulation to be formed between the irrigation farmland 10 and the oxidation pond 3, the booster pump 7 is used for pumping water in the oxidation pond 3 to the irrigation farmland 10 through the irrigation channel 6, and the valve 9 is used for controlling the on-off of the return pipe 8.
The separation module is a filter 1, the filter 1 is the existing mature technology, it is used for solid-liquid separation, it can be selected and matched as required, can use the purification tank of liquid dung separation processing or other devices with the same function, and will not be described again here.
The solid treatment module is a fermentation tank 11, and after the fermentation tank 11 performs fermentation and composting on solid waste in the domestic sewage, the fertilizer is applied to the irrigated farmland 10.
A utilization method for a rural domestic sewage overall treatment system, which comprises the following steps,
s1, discharging the rural domestic sewage into a filter 1, carrying out solid-liquid separation on the domestic sewage by the filter 1, transmitting the separated liquid into an oxidation pond 3 through a sewage pipe, and transporting the solid waste separated in the filter 1 into a fermentation tank 11 for fermentation;
s2, planting landscape green plants 4 in the oxidation pond, and adding a microbial agent to a biological carrier filler at the bottom of the ecological floating island 5 to generate a large amount of microorganisms for purifying water quality;
s3, delivering the purified water in the oxidation pond to an irrigation farmland 10 through a booster pump 7 and an irrigation channel 6, and irrigating the farmland;
s4, fermenting the solid waste in the fermentation tank 11 to form an organic fertilizer, and applying the organic fertilizer to the irrigated farmland 10 to provide growth nutrition for crops;
and S5, when the water quantity in the irrigated farmland 10 is excessive, the water flows back to the oxidation pond 3 through the return pipe 8 to store water.
The specific implementation process is as follows:
when the rural domestic sewage overall treatment system and the utilization method thereof are used, the filter 1 is utilized to carry out primary treatment on the rural domestic sewage, the filter 1 separates solid pollutants and sewage in the domestic sewage, the separated solid pollutants mainly comprise excrement and food residues, the solid pollutants are biodegraded by excrement degrading bacteria in the fermentation tank 11, and the degraded residues are temporarily stored in the fermentation tank 11; and the sewage after solid-liquid separation enters the rear end for biological treatment, and is discharged after aerobic biological treatment, anoxic biological treatment and gravity precipitation treatment in sequence. Discharged sewage enters an oxidation pond 3 through a sewage discharge pipe 2, a certain amount of biological carrier fillers and aeration equipment are installed inside the oxidation pond 3 through a biological floating island, then microbial agents are added through an external source and the added microorganisms are cultured and domesticated, so that the microorganisms are attached to the biological carriers to live, the sewage in the oxidation pond 3 is continuously purified, emergent landscape plants are planted inside the oxidation pond 3 to beautify the environment and simultaneously assist in degrading pollutants, the sewage is subjected to secondary treatment in the oxidation pond 3, the aim is to purify and maintain water quality, and the influence on human living environment caused by water quality deterioration due to long-term water storage in the oxidation pond 3 is prevented.
The oxidation pond 3 has both landscape effect and water storage function. The water outlet of the oxidation pond 3 is connected with the irrigation channel 6, and the oxidation pond 3 is in a water storage state daily. When the farmland needs to be intensively irrigated, the booster pump 7 or the gate at the water outlet of the oxidation pond 3 can be opened, the water source in the oxidation pond 3 flows into the farmland irrigation channel 6, farmers can directly take the water source in the farmland to irrigate the farmland, and the water quality is better after twice treatment because the water source in the oxidation pond 3 is domestic sewage, but the water still contains abundant nutrient substances compared with underground water extracted by the farmers for irrigation, so that the water-saving irrigation device has a good effect on nutrition supplement of crops. And when the sewage treatment and utilization are finished, the water source which is not used up for irrigation is returned to the oxidation pond 3 for continuous storage.
Solid residues left after the treatment of the excrement degrading bacteria are accumulated in the fermentation tank 11 after the front-end solid-liquid separation, and the residues are subjected to biodegradation and decomposition fermentation processes to become good natural fertilizers which can be directly applied to farmlands after being periodically extracted. So far, the treatment and the utilization of the solid residues in the domestic sewage are finished.
The rural domestic sewage overall treatment system and the utilization method thereof have low investment cost, the rural domestic sewage is primarily treated by adopting the simple filter 1, and the rural pit pond is reused to form the oxidation pond 3 for secondary treatment of sewage, so that the overall investment cost is low.
The filter 1 and the improved reinforced oxidation pond 3 in the system and the method do not need long-term operation and maintenance of professionals, only landscape plants in the oxidation pond 3 need to be harvested regularly, and later-stage operation and maintenance technology difficulty and cost are low.
The system and the method comprehensively treat and comprehensively utilize the sewage and the solid waste in the rural domestic sewage, finally change the sewage and the solid waste into crop fertilizer to continuously participate in natural substance circulation, and realize waste utilization and water resource recycling;
the system and the method conform to the actual current situation of the rural area, a plurality of abandoned ponds and irrigation channels in the rural area are reused to form a large circulation for treating and utilizing the rural domestic sewage, the treatment problem of the rural domestic sewage is solved, the water resource is saved, emergent landscape plants are planted in the improved ponds, and the living environment of the rural area is beautified.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics of the embodiments is not described herein in any greater extent than that known to persons of ordinary skill in the art at the filing date or before the priority date of the present invention, so that all of the prior art in this field can be known and can be applied with the ability of conventional experimental means before this date. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the applicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (4)
1. The utility model provides a rural domestic sewage overall planning processing system which characterized in that: including irrigating farmland, a plurality of separation module, solid processing module and liquid processing module, be connected through solid processing module and liquid processing module between separation module and the irrigation farmland, separation module passes through the blow off union coupling with liquid processing module, and liquid processing module passes through the pipe connection with the irrigation farmland, liquid processing module includes that oxidation pond, ecological chinampa, the green planting of view, irrigation channel, booster pump and back flow, separation module passes through the blow off pipe and is connected with the oxidation pond, and biochemical pond department is provided with the green planting of ecological chinampa and view, and the bottom of ecological chinampa is provided with a plurality of biological carrier and packs, is connected with the back flow through irrigation channel between oxidation pond and the irrigation farmland, and irrigation channel department is provided with the booster pump, be provided with the valve on the back flow.
2. The rural domestic sewage overall planning treatment system of claim 1, wherein: the separation module is a filter.
3. The rural domestic sewage overall planning treatment system of claim 1, wherein: the solid treatment module is a fermentation tank.
4. The utilization method of the rural domestic sewage overall planning treatment system of claim 1 is characterized in that: comprises the following steps of (a) carrying out,
s1, discharging the rural domestic sewage into a filter, carrying out solid-liquid separation on the domestic sewage by the filter, transmitting the separated liquid into an oxidation pond through a sewage pipe, and transporting the solid waste separated from the filter into a fermentation tank for fermentation;
s2, planting landscape green plants in the oxidation pond, and adding a microbial agent to the biological carrier filler at the bottom of the ecological floating island to generate a large amount of microorganisms for purifying water quality;
s3, conveying the purified water in the oxidation pond to irrigate farmlands through a booster pump and an irrigation channel to irrigate farmlands;
s4, fermenting the solid waste in the fermentation tank to form an organic fertilizer, and applying the organic fertilizer to irrigated farmlands to provide growth nutrition for crops;
and S5, when the water quantity in the irrigated farmland is excessive, the water flows back to the oxidation pond through a return pipe to store water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210696842.XA CN114956478A (en) | 2022-06-20 | 2022-06-20 | Rural domestic sewage overall treatment system and utilization method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210696842.XA CN114956478A (en) | 2022-06-20 | 2022-06-20 | Rural domestic sewage overall treatment system and utilization method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215065A (en) * | 2007-12-26 | 2008-07-09 | 南京大学 | ''Earthworm-hydrophyte-anaerobic microorganism'' combined technique for treating organic waste water |
| CN103159383A (en) * | 2013-04-15 | 2013-06-19 | 云南省科学技术情报研究院 | Rural domestic sewage biological treatment system |
| CN108911158A (en) * | 2018-09-28 | 2018-11-30 | 江西省科学院 | A kind of rural domestic sewage treatment system based on small watershed form |
| US20210139360A1 (en) * | 2019-11-12 | 2021-05-13 | Powerchina Huadong Engineering Corporation Limited | Recycling system for treatming sewage of ecological farm |
-
2022
- 2022-06-20 CN CN202210696842.XA patent/CN114956478A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215065A (en) * | 2007-12-26 | 2008-07-09 | 南京大学 | ''Earthworm-hydrophyte-anaerobic microorganism'' combined technique for treating organic waste water |
| CN103159383A (en) * | 2013-04-15 | 2013-06-19 | 云南省科学技术情报研究院 | Rural domestic sewage biological treatment system |
| CN108911158A (en) * | 2018-09-28 | 2018-11-30 | 江西省科学院 | A kind of rural domestic sewage treatment system based on small watershed form |
| US20210139360A1 (en) * | 2019-11-12 | 2021-05-13 | Powerchina Huadong Engineering Corporation Limited | Recycling system for treatming sewage of ecological farm |
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Application publication date: 20220830 |