CN113603313A - Low-energy-consumption ecological utilization and treatment system for rural rain sewage - Google Patents
Low-energy-consumption ecological utilization and treatment system for rural rain sewage Download PDFInfo
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- CN113603313A CN113603313A CN202111069288.4A CN202111069288A CN113603313A CN 113603313 A CN113603313 A CN 113603313A CN 202111069288 A CN202111069288 A CN 202111069288A CN 113603313 A CN113603313 A CN 113603313A
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- 239000010865 sewage Substances 0.000 title claims abstract description 41
- 238000011282 treatment Methods 0.000 title claims abstract description 32
- 238000005265 energy consumption Methods 0.000 title claims abstract description 19
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 238000001556 precipitation Methods 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 238000003973 irrigation Methods 0.000 claims abstract description 6
- 230000002262 irrigation Effects 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 6
- 230000009466 transformation Effects 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 241000255925 Diptera Species 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 230000008029 eradication Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 5
- 238000011221 initial treatment Methods 0.000 description 3
- 241000238631 Hexapoda Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000257303 Hymenoptera Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003621 irrigation water Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- 238000003860 storage Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000009736 wetting Methods 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
- A01C23/04—Distributing under pressure; Distributing mud; Adaptation of watering systems for fertilising-liquids
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M1/00—Stationary means for catching or killing insects
- A01M1/02—Stationary means for catching or killing insects with devices or substances, e.g. food, pheronones attracting the insects
- A01M1/04—Attracting insects by using illumination or colours
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M2200/00—Kind of animal
- A01M2200/01—Insects
- A01M2200/012—Flying insects
-
- 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
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2103/001—Runoff or storm water
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Pest Control & Pesticides (AREA)
- Hydrology & Water Resources (AREA)
- Environmental Sciences (AREA)
- Public Health (AREA)
- Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Insects & Arthropods (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Soil Sciences (AREA)
- Treatment Of Biological Wastes In General (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Sewage (AREA)
Abstract
The invention provides a low-energy-consumption ecological utilization and treatment system for rural rain sewage, which comprises a surface flow wet area formed by ecological modification of a waste low-lying pond; the surface flow wetland area is sequentially provided with a disinfection and filtration area, a primary disposal area and a peripheral precipitation and separation area from inside to outside. The invention can fully utilize the ubiquitous current situation of the rural area to carry out ecological transformation on the low-lying waste pond, only needs a small amount of temporary power supply during operation, realizes the low-energy-consumption rural domestic sewage and initial rainwater runoff pollution cooperative treatment, effectively improves the rural landscape through the construction of the wetland landscape and the irrigation system, realizes the resource utilization of the rainwater and sewage, and lays a solid foundation for the vogue of the rural area.
Description
Technical Field
The invention relates to a low-energy-consumption ecological utilization and treatment system for rural rain sewage.
Background
In rural areas of China, due to the reasons of low population density, labor force going out in young and old years and the like, the daily domestic sewage yield is small, and the domestic sewage has the characteristic of large concentration fluctuation of pollutants in the morning, at noon and at night. At present, the common rural sewage treatment technology is mainly used for constructing a pipe network and then conveying the pipe network to a sewage treatment plant/station for treatment, and the treated tail water resource is not effectively recycled. The technology takes daily average domestic water consumption as a design treatment scale during design, a large amount of sewage treatment equipment is seriously insufficient in water inflow in the actual operation process, a large amount of capital waste is caused, and runoff pollution caused by initial rainwater is not considered.
Disclosure of Invention
In order to solve the technical problems, the invention provides the low-energy-consumption ecological utilization and treatment system for the rural rainwater sewage, which can reduce the application amount of chemical fertilizers and the irrigation water intake amount of the agricultural land from the source, realize resource recycling and fully embody the ecological environment protection concept.
The invention is realized by the following technical scheme.
The invention provides a low-energy-consumption ecological utilization and treatment system for rural rainwater sewage, which comprises a surface flow wet area formed by ecological modification of a waste low-lying pond; the surface flow wetland area is sequentially provided with a disinfection and filtration area, a primary disposal area and a peripheral precipitation and separation area from inside to outside.
A deep disposal area is arranged between the disinfection filtering area and the primary disposal area.
And the peripheral precipitation separation area is internally provided with a multi-stage grid from thick to thin to isolate solid suspended matters.
The primary disposal area, the peripheral precipitation separation area and/or the disinfection filtration area are/is communicated with each other through a one-way communicating pipe, and the two ends of the communicating pipe are blocked by adopting a compact net; the dense net is made of stainless aluminum alloy.
A biological phosphorus removal device is arranged in the primary disposal area for reducing COD and NH in the sewage3And TP concentration.
An MBR biological membrane is arranged in the advanced treatment area and is used for adsorbing COD and NH in the sewage3And TP.
And a water outlet pipeline is pre-buried at the bottom of the surface flow wet area and communicated to an agricultural land irrigation system outside the village.
And ultraviolet disinfection equipment is arranged in the disinfection filtering area.
The heights of the surface flow wet area, the disinfection and filtration area, the primary disposal area and the peripheral precipitation and separation area are increased in sequence.
And a mosquito eradication device is arranged in the surface flow wetland area.
The invention has the beneficial effects that: the ecological transformation can be carried out by fully utilizing the ubiquitous current situation of rural low-lying waste ponds, only a small amount of temporary power supply is needed in operation, the low-energy-consumption rural domestic sewage and initial rainwater runoff pollution cooperative treatment is realized, meanwhile, the rural landscape is effectively improved through the construction of wetland landscape and an irrigation system, the rainwater and sewage resource utilization is realized, and a solid foundation is laid for the vogue of rural areas.
Drawings
FIG. 1 is a top view of the present invention;
fig. 2 is a cross-sectional view of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
Example 1
The ecological utilization and treatment system for the low-energy-consumption rural rain sewage as shown in fig. 1 and 2 comprises a surface flow wet area formed by ecologically modifying a waste low-lying pond; the surface flow wetland area is sequentially provided with a disinfection and filtration area, a primary disposal area and a peripheral precipitation and separation area from inside to outside.
Example 2
There is also a deep treatment zone between the sterile filtration zone and the primary treatment zone based on example 1.
Example 3
Based on the embodiment 1, the peripheral precipitation separation area is provided with a multi-stage grid from thick to thin for isolating solid suspended substances.
Example 4
Based on the embodiment 1, the water inlet channels of the primary disposal area, the peripheral precipitation separation area and/or the disinfection filtration area are communicated through a one-way communicating pipe, and two ends of the communicating pipe are blocked by adopting a compact net; the dense net is made of stainless aluminum alloy.
Example 5
Based on the embodiment 1, a biological phosphorus removal device is arranged in the primary disposal area for reducing COD in sewage,NH3And TP concentration.
Example 6
Based on example 2, MBR biological membrane for adsorbing COD and NH in the sewage is arranged in the advanced treatment area3And TP.
Example 7
Based on the embodiment 1, the water outlet pipeline embedded at the bottom of the surface flow wetland area is communicated to an agricultural land irrigation system outside the village.
Example 8
Based on example 1, an ultraviolet disinfection apparatus was arranged in the disinfection filtration zone.
Example 9
Based on example 1, the heights of the surface wetting zone, the disinfection filtration zone, the primary disposal zone and the peripheral sedimentation separation zone were increased in order.
Example 10
Based on embodiment 1, the mosquito eradication device is arranged in the surface flow wetland area.
Example 11
Based on the embodiment, the ecological modification method comprises a surface flow wet area of the existing abandoned low-lying pond in the rural area, and further comprises a peripheral sedimentation separation area, a primary treatment area, a deep treatment area and a disinfection and filtration area, wherein the total area is five functional areas. The upper surface layer of each functional partition is detachably paved, so that the maintenance in later-period operation is facilitated. An anti-seepage isolation belt is arranged between the functional zones, and solar insect killing equipment, a small submersible pump and an outward drainage pipeline are arranged in the surface flow wetland zone.
The method comprises the following steps of cleaning and dredging a drainage channel of rural residents, uniformly connecting domestic sewage of the peasant households into a peripheral precipitation separation area through a drainage channel/pipe, sequentially arranging thick gratings in the precipitation separation area to isolate solid suspended matters wrapped in the sewage, and arranging thin gratings to filter thick and thin impurity particles carried in the sewage.
The precipitation separation area is divided into two parts which have synergistic effect, and when one part of the precipitation separation area is regularly cleaned and maintained, the normal operation of the system is not influenced.
Sewage enters the primary disposal area through the bottom one-way communicating pipe after passing through the precipitation separation area, and the two ends of the communicating pipe are plugged by adopting a compact net made of a fine stainless aluminum alloy material, so that the pipeline is prevented from being blocked.
A biological phosphorus removal device is arranged in the primary disposal area, which can reduce COD and NH in the sewage3And TP concentration.
Sewage enters the advanced treatment area through the bottom one-way communicating pipe after passing through the primary treatment area, and an MBR (membrane bioreactor) biofilm is arranged in the advanced treatment area to further treat COD (chemical oxygen demand) and NH (NH) in the sewage3And TP are subjected to adsorption treatment.
And the sewage enters the disinfection filtering area through the bottom one-way communicating pipe after passing through the advanced treatment area, and ultraviolet disinfection equipment is arranged in the disinfection filtering area.
Sewage flows into the surface flow wetland through ecological grass planting bank protection seepage under the action of gravity after passing through the disinfection filtering area, and aquatic animal and plant communities with landscape improvement effects are constructed in the surface flow wetland, so that local villages and features are enriched.
The water outlet pipeline is embedded in the bottom of the surface flow wetland, the opening and closing of the water outlet pipeline are controlled by a valve, the water outlet pipeline is connected with an agricultural land irrigation system outside the village, the treated water body can be used for irrigating crops, and the residual nutrient substances in the water can provide nutrients for the crops, so that the use of chemical fertilizers is reduced.
The solar mosquito killing lamp is arranged in the surface flow wetland in a distributed mode, and is matched with the wetland landscape to be constructed, so that the overall landscape effect of the system is improved while the breeding of harmful insects and ants is eliminated.
When the atmosphere falls, the pipeline valve communicated with the outside is closed, and the wetland can be used as a regulation and storage area of initial rainwater runoff with higher pollution concentration.
After precipitation stops, the water in the wetland is conveyed to the precipitation separation area for disposal through a preset small submersible pump, so that the ecological stability of the system is maintained and enhanced while runoff non-point source pollution is effectively reduced.
Claims (10)
1. The utility model provides a low energy consumption rural area rain sewage ecological utilization processing system, includes the wet area of surface current that the ecological transformation of abandonment low-lying pond formed, its characterized in that: the surface flow wetland area is sequentially provided with a disinfection and filtration area, a primary disposal area and a peripheral precipitation and separation area from inside to outside.
2. The ecological utilization and treatment system for low-energy-consumption rural rain sewage of claim 1, wherein: a deep disposal area is arranged between the disinfection filtering area and the primary disposal area.
3. The ecological utilization and treatment system for low-energy-consumption rural rain sewage of claim 1, wherein: and the peripheral precipitation separation area is internally provided with a multi-stage grid from thick to thin to isolate solid suspended matters.
4. The ecological utilization and treatment system for low-energy-consumption rural rain sewage of claim 1, wherein: the primary disposal area, the peripheral precipitation separation area and/or the disinfection filtration area are/is communicated with each other through a one-way communicating pipe, and the two ends of the communicating pipe are blocked by adopting a compact net; the dense net is made of stainless aluminum alloy.
5. The ecological utilization and treatment system for low-energy-consumption rural rain sewage of claim 1, wherein: a biological phosphorus removal device is arranged in the primary disposal area for reducing COD and NH in the sewage3And TP concentration.
6. The ecological utilization and treatment system for low-energy-consumption rural rain sewage of claim 2, wherein: an MBR biological membrane is arranged in the advanced treatment area and is used for adsorbing COD and NH in the sewage3And TP.
7. The ecological utilization and treatment system for low-energy-consumption rural rain sewage of claim 1, wherein: and a water outlet pipeline is pre-buried at the bottom of the surface flow wet area and communicated to an agricultural land irrigation system outside the village.
8. The ecological utilization and treatment system for low-energy-consumption rural rain sewage of claim 1, wherein: and ultraviolet disinfection equipment is arranged in the disinfection filtering area.
9. The ecological utilization and treatment system for low-energy-consumption rural rain sewage of claim 1, wherein: the heights of the surface flow wet area, the disinfection and filtration area, the primary disposal area and the peripheral precipitation and separation area are increased in sequence.
10. The ecological utilization and treatment system for low-energy-consumption rural rain sewage of claim 1, wherein: and a mosquito eradication device is arranged in the surface flow wetland area.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069288.4A CN113603313B (en) | 2021-09-13 | 2021-09-13 | Low-energy-consumption rural rainwater and sewage ecological utilization treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069288.4A CN113603313B (en) | 2021-09-13 | 2021-09-13 | Low-energy-consumption rural rainwater and sewage ecological utilization treatment system |
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| Publication Number | Publication Date |
|---|---|
| CN113603313A true CN113603313A (en) | 2021-11-05 |
| CN113603313B CN113603313B (en) | 2023-05-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN101948219A (en) * | 2010-09-09 | 2011-01-19 | 桂林理工大学 | Low-consumption biological treatment method of rural sewage |
| CN104496129A (en) * | 2014-12-27 | 2015-04-08 | 温州泓呈祥科技有限公司 | System for deeply treating sewage in rural areas |
| US20160207808A1 (en) * | 2013-09-06 | 2016-07-21 | Marco Antonio CASTELLANOS ROLDÁN | System and multi-functional method for treating wastewater |
| US20160376180A1 (en) * | 2014-03-21 | 2016-12-29 | Nanjing University Ecological Research Institute Of Changshu | Device for artificial wetland sewage treatment and method for treating sewage thereof |
| CN208732861U (en) * | 2018-07-19 | 2019-04-12 | 广州市健安环保技术有限公司 | A kind of rural domestic sewage treatment facility |
| CN109879528A (en) * | 2019-02-18 | 2019-06-14 | 江西盖亚环保科技有限公司 | Processing method and system of the domestic sewage in rural areas from driving landscape ecological |
| CN211644786U (en) * | 2019-12-30 | 2020-10-09 | 成都天府隆中生态科技开发有限公司 | Biochemical wetland ecological purification system for new rural domestic sewage |
-
2021
- 2021-09-13 CN CN202111069288.4A patent/CN113603313B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101659498A (en) * | 2009-07-30 | 2010-03-03 | 四川省运辉环保工程咨询有限公司 | Compound artificial wetland treatment process of domestic sewage in villages and towns in rural areas |
| CN101948219A (en) * | 2010-09-09 | 2011-01-19 | 桂林理工大学 | Low-consumption biological treatment method of rural sewage |
| US20160207808A1 (en) * | 2013-09-06 | 2016-07-21 | Marco Antonio CASTELLANOS ROLDÁN | System and multi-functional method for treating wastewater |
| US20160376180A1 (en) * | 2014-03-21 | 2016-12-29 | Nanjing University Ecological Research Institute Of Changshu | Device for artificial wetland sewage treatment and method for treating sewage thereof |
| CN104496129A (en) * | 2014-12-27 | 2015-04-08 | 温州泓呈祥科技有限公司 | System for deeply treating sewage in rural areas |
| CN208732861U (en) * | 2018-07-19 | 2019-04-12 | 广州市健安环保技术有限公司 | A kind of rural domestic sewage treatment facility |
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| CN211644786U (en) * | 2019-12-30 | 2020-10-09 | 成都天府隆中生态科技开发有限公司 | Biochemical wetland ecological purification system for new rural domestic sewage |
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