AU2021105235A4 - Nonpoint source pollution control technology based on three-dimensional configuration of points, lines and planes - Google Patents
Nonpoint source pollution control technology based on three-dimensional configuration of points, lines and planes Download PDFInfo
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Classifications
-
- 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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
- C02F3/306—Denitrification of water in soil
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- 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
- C02F3/1257—Oxidation ditches
-
- 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- E03F5/103—Naturals or landscape retention bodies, e.g. ponds
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- 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
Abstract
OF THE DISCLOSURE
The present disclosure relates to the technical field of nonpoint source pollution control,
in particular to a novel combined technology that can carry out a three-dimensional
technology configuration of points, lines and planes and technology treatment on rural
nonpoint source pollutants and agricultural nonpoint source pollutants so as to enable the
pollutants to meet the standards of Grade I Level B of Discharge standard ofpollutantsfor
municipal wastewater treatment plant (GB 18918-2002). Aiming at the characteristics of
wide space-time range, large uncertainty, complex components and process, and difficult
control of rural nonpoint source pollution and agricultural nonpoint source pollution, a
denitrification and dephosphorization combined technological process based on points, lines
and planes and key technologies are sequentially arranged along migration routes of
pollutants from a source-flow-sink process of nitrogen and phosphorus loss, with
topographic and geomorphic features of a research area considered. The key technologies
are characterized by comprising (1) a point configuration (front damming treatment)
technology; (2) a line configuration (ecological interception based on hydraulic pattern
optimization) technology; and (3) a plane configuration (combination of anaerobic treatment
in a deep pond and aerated oxidation in a shallow pond) technology. Therefore, landscapes
of residential areas of farmers and agricultural areas are beautified while pollution loads are
reduced.
17957341_1 (GHMatters) P116967.AU
1/1
Domestic Livestock and poultry
wastewater breeding wastewater
------------------------------
a--- -----------------
Flower bed type soil Improved Front damming
infiltration pond biogas digester tr ea tment
Points
Agricultural Ecological
base ditch Eooia
ditch
Ecological Lines
Ecological interception based on
hydraulic pattern optimization
Vegetative buffer
belt Planes
Treatment in deep
AeratedFautiv
oxidation in Facltaiv Effluent
sOhallo w pond pn
FIG 1
Description
1/1
Domestic Livestock and poultry wastewater breeding wastewater
a--- ----------------- ------------------------------
Flower bed type soil Improved Front damming infiltration pond biogas digester tr ea tment
Points
Agricultural Ecological base ditch Eooia ditch Ecological Lines
Ecological interception based on hydraulic pattern optimization
Vegetative buffer belt Planes
in deep Treatment
AeratedFautiv oxidation in Facltaiv Effluent sOhallo w pond pn
FIG 1
[01] This patent relates to the technical field of agricultural nonpoint source pollution treatment, in particular to a novel technology that can treat rural nonpoint source pollutants and agricultural nonpoint source pollutants through a combined technology based on a three-dimensional configuration of points, lines and planes so as to enable the pollutants to meet the standards of Grade I Level B of Discharge standard ofpollutants for municipal wastewater treatmentplant(GB 18918-2002).
[02] As fast development of economy and society deteriorates rural environment, rural nonpoint source pollution has become one of the main pollution sources affecting water environmental quality, and rural and agricultural nonpoint source pollution has also become a significant factor affecting water quality. Research and practice on nonpoint source pollution control in China, compared with foreign countries, lag behind, jog along, but still has born some gratifying fruits in recent years. In previous research, multiple new nonpoint source pollution control technologies with independent intellectual property rights have been exploited, breakthroughs have been made in harmless treatment of rural solid waste, precise and balanced fertilization, domestic wastewater treatment in villages and towns, nonpoint source pollution control simulation in watersheds, and other aspects, and an integrated management system for nonpoint source pollution control in watersheds has been put forward at first in China. The developed packaged nonpoint source pollution control technology in river network areas aims to research nonpoint source pollution in the river network areas, through a biological and ecological combined technology, rural domestic wastewater is treated, and through front damming treatment, river network ecological restoration, estuary pollution control technology research and project demonstration, a systematic technical scheme for nonpoint source pollution control in the river network areas is put forward, and a representative demonstration project is constructed. Various technologies and an overall technical scheme formed in research have technical and economic feasibility, and provide technical support and demonstration models for nonpoint source pollution control in China. But overall, China still faces enormous challenges in management of rural nonpoint source pollution. Nowadays, rural nonpoint source pollution control in China is still in research and planning stages, and some pilot projects within a
17957341_1 (GHMatters) P116967.AU limited scope mainly focus on analyzing the causes of nonpoint source pollution from the perspective of engineering technology and implementing corresponding treatment schemes. According to the characteristics of rural nonpoint source pollution, rural nonpoint source pollution is mainly controlled by utilizing a point source pollution control technology at present. However, since nonpoint source pollution points are difficult to determine, the quantity of pollution sources is difficult to determine, and main bodies of pollution discharge are fundamentally different from those of point source pollution, that is, the main bodies of pollution discharge of nonpoint source pollution are changed from large numbers of legal persons, organizations or groups to scattered groups (even tens of thousands of natural persons), etc. As a result, the point source pollution control technology cannot adapt to the new characteristics of nonpoint source pollution, and thus cannot play its roles. In old rural areas, unauthorized building, stacking and dumping are rampant, and it is impossible to obviously change the dirty, disorderly and bad environment of rural areas only by relying on a wastewater pipe network reconstruction mode in old rural areas. At the same time, due to overwhelmingly high construction cost, wastewater pipe network reconstruction in old rural areas cannot be popularized and applied under the circumstance of decentralized utilization rather than centralized utilization of funds for rural reconstruction in China. Chemical fertilizer loss pollution, pesticide pollution, animal husbandry pollution, etc., main components of agricultural nonpoint source pollution, have the widest range of influence. Agricultural production in China is often scattered such that discharge management cannot be easily centralized as point source pollution. Therefore, the vital problems for agricultural nonpoint source pollution are how to control sources and how to use an efficient and low-input wastewater treatment technology to control the concentrations of pollutants to be within an allowable range of the environment. Effective treatment of agricultural nonpoint source pollution is not only an engineering technology problem, but also a research topic in terms of system and mechanism. As agricultural production develops and rural lifestyles change, research on agricultural nonpoint source pollution will be long-term and dynamic. In the future, China urgently needs to reinforce scientific research on rural environmental renovation, increase science and technology input in rural environmental protection, and strengthen educational propaganda of rural environmental protection, so as to guarantee rural nonpoint source pollution control from many aspects such as technology and management. In urban nonpoint source pollution control of China, current water environment management mainly lays emphasis on meeting the needs of flood control, water supply and landscapes, in other word, current water environment management still concentrates on meeting low-order needs and urgently treating superficial problems. In
17957341_1 (GHMatters) P116967.AU urban comprehensive planning, it is necessary to consider regional ecological configuration of urban water cycle, combination of water cycle and various ecological service functions, and ecological design and ecological management for rainwater and runoffs, so as to control urban nonpoint source pollution and create an ecological city.
[03] This patent was applied in topic 2 "Water pollution control and water quality protection technology research and demonstration" of project "Research on ecological protection and recycling of Poyang lake" in National Science and Technology Support Program in the 11th Five-Year Plan. After continuous operation in one year, the results show that this technology can obviously remove rural nonpoint source pollutants and agricultural nonpoint source pollutants.
[04] 1. Purpose of Present Disclosure
[05] Aiming at the prominent problems of rural nonpoint source pollution and agricultural nonpoint source pollution, the present disclosure provides a combined technology based on a three-dimensional configuration of points (front damming treatment), lines (ecological interception based on hydraulic pattern optimization) and planes (anaerobic treatment in a deep pond and aerated oxidation in a shallow pond). Effluent, after wastewater from rural areas and agricultural production is treated by this technology, may meet the standards of Grade I Level B of Discharge standardofpollutants for municipal wastewater treatmentplant(GB 18918-2002).
[06] 2. Technical Solutions
[07] This patent employs the combined technology based on points (front damming treatment), lines (ecological interception based on hydraulic pattern optimization) and planes (anaerobic treatment in the deep pond and aerated oxidation in the shallow pond). The technical solutions of key technologies:
[08] (1) a point (front damming treatment) technology: on the basis of analysis of pollution sources in a research area, rural domestic wastewater and livestock and poultry breeding wastewater are collected by means of pipelines and then enter a flower bed type soil infiltration pond and a biogas digester to be recycled respectively, and the effluent is guided by a pipeline to enter a front damming treatment area, where a water retaining wall is arranged at a water inlet end of the front damming treatment area, and pebble grids with different sizes are stacked on the water retaining wall; and meanwhile, an interception dam is arranged on an original river channel, and the interception dam on the river channel is higher than the water retaining wall according to water level requirements such that river
17957341_1 (GHMatters) P116967.AU water may autonomously flow through the water retaining wall with the pebble grids distributed thereon; solid floaters with larger particles are removed at first, and then the river water flows into a sedimentation pond at a front end, where a detention pond with a natural stone landscapes is arranged in the sedimentation pond; and wastewater subjected to circulation, sedimentation and detention enters a farmland.
[09] (2) A line (ecological interception based on hydraulic pattern optimization) technology: in order to realize ecological interception and directional reduction of farmland land-sourced pollutants, according to topographic features and farmland crop coverage conditions, ecological ditches and ecological slope are arranged along a runoff transport path, a circulating water flow system of a vegetable garden and a paddy field and a circulating water flow system of the vegetable garden, a breeding pond and the paddy field are constructed, and a multi-combined ecological pollutant interception unit is constructed, such that detention time of the water in land areas is increased, and a circulation utilization rate of nutrients is improved so as to carry out ecological interception and reduction of the farmland land-sourced pollutants.
[10] (3) A plane (combination of anaerobic treatment in the deep pond and aerated oxidation in the shallow pond) technology: best management practices (BMPs) and a grassland, a lake (river) bank buffer belt and a storm water accumulation pond in the BMPs are introduced thereinto to form an ecological treatment mode of a multi-pond and wetland coupled system for agricultural nonpoint source pollution assimilation, a depth of the anaerobic deep pond is generally about 3.5 meters or more; organic matter (load rate) received per unit water surface per day greatly varies due to the influence of an annual average temperature in each area; the wastewater enters an aerated oxidation pond with a surface aerator, arranged at a rear portion of the shallow pond, and a depth of the aerated oxidation pond is about 4 meters or more; a load rate and the detention time vary widely and are affected by temperature and aeration; when the whole pond water is aerobic, the load rate may be higher and the detention time may be shortened; and the treated water enters a facultative pond wetland ecosystem and then flows out of a treatment unit.
[11] 3. Technical Effects
[12] Compared with the prior art, this patent has the following advantages and outstanding effects:
[13] (1) From a source-flow-sink process of generation of pollutants in rural areas and an agricultural production process, the spatial three-dimensional configuration of the pollutant ecological assimilation control technology is carried out at points (source area identification and reduction), lines (field paths and the ditches) and planes (land-water
17957341_1 (GHMatters) P116967.AU intersection areas and the multi-pond system) for nonpoint source pollution control in small watersheds, which not only effectively treats nonpoint source pollution, but also has good applicability.
[14] (2) A nonpoint source pollution control system based on a three-dimensional configuration of points, lines and planes may adapt to the instability of rural nonpoint source pollution, and the characteristics that runoff volumes and pollutant concentrations fluctuate with the change of hydrological conditions.
[15] (3) Through the nonpoint source pollution control system based on a three-dimensional configuration of points, lines and planes, a removal rate of each of the pollutants of COD, TP, TN, NH4-N, N03-N and N02-N exceeds 50%, and a removal rate of part of N02-N exceeds 80%.
[16] Average treatment rate
% Front damng EVegetative Multi-pond Total buffer belt wetland removal treatment ditch (lines) (planes) (planes) (points) COD 30.14 26.36 51.60 27.57 56.43 TP 21.92 24.65 63.54 29.43 56.27 TN 19.98 31.77 56.03 38.36 67.61 NH4--N 42.72 59.30 50.38 45.45 66.92 NH3- -N 9.30 51.00 54.77 29.75 64.95 NH2- -N 39.70 61.60 76.47 32.50 82.33
[17] Table 1 shows pollutant removal effects (%) of various treatment units of a nonpoint source pollution control technology based on a three-dimensional configuration of points, lines and planes.
[18] (4) In the nonpoint source pollution control system based on a three-dimensional configuration of points, lines and planes, TN and TP in influent fluctuate seasonally, but the concentrations of TN and TP in the effluent still remain relatively stable and are basically below 0.80 mg/L and 0.05 mg/L respectively, which indicates that the artificial wetland system has a certain ability to resist impact loads.
[19] (5) The nonpoint source pollution control system based on a three-dimensional configuration of points, lines and planes is less in investment, good in benefit, strong in resistance to nonpoint source load impact, simple in operation and management, relatively low in one-time investment and construction cost of technology, and also low in operation cost, and has a good application prospect in reduction of lakeside rural nonpoint source pollution load inflow.
17957341_1 (GHMatters) P116967.AU
[20] FIG. 1 is a flow diagram of a nonpoint source pollution control technology based on a three-dimensional configuration of points, lines and planes.
[21] (1) Analysis and recycling of pollution sources are carried out on points: 1) control over rural domestic wastewater: an original mode that washing wastewater is randomly discharged is changed, a flower bed type soil infiltration pond is built, and domestic wastewater is recycled. 2) Then the domestic wastewater and swine wastewater are converted into biogas and fertilizers, a pond volume is designed according to 1-2 m3 per person, and construction is carried out according to The collection of designsfor household hydraulic biogas digesters in ruralareas (GB/T4750-2002); and at the same time, toilets are reformed, excrement is directly discharged into a biogas digester for fermentation, and biogas is obtained to serve as domestic gas; and on the other hand, biogas liquid may serve as fertilizers for farmland crops. 3) In a front damming system, a local natural clear water pond is used, and spring water on mountains is guided to the clear water pond by means of natural ditches such that villagers may wash clothes and vegetables centralizedly, and washing wastewater, centralized in the pond, may be collected and treated more easily. However, the clear water pond is different from common ponds (in most of which stagnant water is) in rural areas and is connected to a lower treatment system.
[22] (2) Ecological interception and reduction of pollutants are carried out on lines: 1) interplanting and mixed sowing are carried out in a farmland; a crop rotation system and grass-crop rotation are improved; and soil and water conservation technologies, such as the minimum tillage technology, the no-tillage technology and the technology of remaining stubbles after harvest, have the effects of water conservation, reducing fertilizer loss, increasing grain yield and the like and may effectively reduce N, P and sediment pollution. 2) Interception (Transport): ecological ditches and ecological slope are arranged along a runoff transport path according to topographic features and farmland crop coverage conditions, a circulating water flow system of a vegetable garden and a paddy field and a circulating water flow system of the vegetable garden, a breeding pond and the paddy field are constructed, and a multi-combined ecological pollutant interception unit is constructed, such that detention time of the water in land areas is increased, and a circulation utilization rate of nutrients is improved so as to carry out ecological interception and reduction of farmland land-sourced pollutants; and there are natural or artificial ecosystems in these ditches, and
17957341_1 (GHMatters) P116967.AU the pollutants in the wastewater may be transported and intercepted.
[23] (3) Pollutant removal and ecological assimilation are carried out on planes, and a more economical, environmentally friendly and beautiful treatment technology and purification technology are researched and developed for rural nonpoint source wastewater treatment. 1) Vegetative buffer belts: different types of vegetative buffer restoration sample belts are constructed, so as to restore landscapes and ecosystem service functions of buffer areas, increase a vegetation coverage rate of a wetland, improve biodiversity, and enhance the productivity and self-sustaining capacity of the ecosystems. 2) A technology of "a deep water fish pond, a shallow pond and a facultative pond" is used to treats a surface runoff, purified water is introduced into fish ponds in most areas, but the fish pond here serves as one part of a wastewater treatment system to convert the pollutants into food for fishes and finally recycle waste. 3) A combined technology of "field ditches, the fish pond, an artificial wetland and the facultative pond" is used to treat agricultural production wastewater, and an ecological treatment mode of a multi-pond and wetland coupled system for agricultural nonpoint source pollution assimilation is formed. On the one hand, the treated water is discharged into irrigation ditches to serve as irrigation water again; and on the other hand, economic crops such as reeds, calami, cress, arrowheads and cane shoots are planted in the shallow pond to realize ecological assimilation treatment of the pollutants. 4) Operation: a biological pond may be used for planting aquatic crops (such as water lettuces, water chestnuts and lotus roots) or breeding fishes and ducks. This operation will promote natural circulation of substances, is conductive to wastewater treatment, and may compensate for some treatment cost. Effluent from the biological pond may be used for farmland irrigation, and the biological pond is often used because of its detention function. The good effluent from the biological pond may be directly discharged into natural water, discharge time should match with hydrological conditions of the water, and the pollutants in the wastewater may be transported and intercepted by means of the field ditches, such that an overall treatment effect is improved. The fish pond does not passively receive purified water any more, but becomes one part of a purification and restoration system to convert the pollutants into the food for the fishes. The multi-pond treatment system not only is used for wastewater treatment, but also recycles the waste by planting the commercial crops.
[24] It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.
[25] In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the 17957341_1 (GHMatters) P116967.AU word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
17957341_1 (GHMatters) P116967.AU
Claims (1)
1. A nonpoint source pollution control technology based on a three-dimensional configuration of points, lines and planes, wherein a denitrification and dephosphorization combined technological process based on points, lines and planes and key technologies are sequentially arranged along migration routes of pollutants from a source-flow-sink process of generation of pollutants in rural areas and an agricultural production process, with topographic and geomorphic features of an area considered; the key technologies comprise the following parts: (1) a point configuration (front damming treatment) technology: rural domestic wastewater and livestock and poultry breeding wastewater are collected by means of pipelines, the rural domestic wastewater is treated by means of a flower bed type soil infiltration pond, the livestock and poultry breeding wastewater is recycled by means of a biogas digester, effluent is guided by a pipeline to enter a front damming treatment area, wherein the area of the front damming treatment area is not less than 100 m2 , and a water depth is designed to be 1-3 meters, and an ecological floating bed and aquatic vegetative belt technologies are used for denitrification and dephosphorization; (2) a line configuration (ecological interception based on hydraulic pattern optimization) technology: ecological ditches and ecological slope are arranged along a runoff transport path according to topographic features and farmland crop coverage conditions, a circulating water flow system of a vegetable garden and a paddy field and a circulating water flow system of the vegetable garden, a breeding pond and the paddy field are constructed, and a multi-combined ecological pollutant interception unit and a surface runoff collecting and regulating subsystem are constructed, wherein a length of the ditches is more than 1000 meters, the ditches are excavated or reconstructed by combining ditches in plain river network areas with an ecological ditch, and the gradient of the ecological slope is less than 30 degrees; and (3) a plane configuration (combination of anaerobic treatment in a deep pond and aerated oxidation in a shallow pond) technology: a water depth of the anaerobic deep pond is 3.5-4 meters; organic matter (load rate) received per unit water surface per day greatly varies due to the influence of an annual average temperature in each area; and the wastewater enters an aerated oxidation pond with a surface aerator, arranged at a rear portion of the shallow pond, and a depth of the aerated oxidation pond is about 4 meters or more; and the three parts are connected in sequence to form a complete ecological assimilation system for rural nonpoint source pollution control and agricultural nonpoint source pollution control in small watersheds of a Binhu district.
17957341_1 (GHMatters) P116967.AU
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| AU2021105235A AU2021105235A4 (en) | 2021-08-10 | 2021-08-10 | Nonpoint source pollution control technology based on three-dimensional configuration of points, lines and planes |
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| AU2021105235A AU2021105235A4 (en) | 2021-08-10 | 2021-08-10 | Nonpoint source pollution control technology based on three-dimensional configuration of points, lines and planes |
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| AU2021105235A4 true AU2021105235A4 (en) | 2021-10-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230105A (en) * | 2021-12-27 | 2022-03-25 | 南京大学 | Method for reducing farmland non-point source pollution by utilizing reinforced natural irrigation and drainage ditches |
| CN114933364A (en) * | 2022-05-12 | 2022-08-23 | 长江生态环保集团有限公司 | System and method for improving rural domestic sewage treatment efficiency |
-
2021
- 2021-08-10 AU AU2021105235A patent/AU2021105235A4/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230105A (en) * | 2021-12-27 | 2022-03-25 | 南京大学 | Method for reducing farmland non-point source pollution by utilizing reinforced natural irrigation and drainage ditches |
| CN114933364A (en) * | 2022-05-12 | 2022-08-23 | 长江生态环保集团有限公司 | System and method for improving rural domestic sewage treatment efficiency |
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