CN104326552A - Reverse-flow ecological purification tank for irrigated area drainage channels - Google Patents
Reverse-flow ecological purification tank for irrigated area drainage channels Download PDFInfo
- Publication number
- CN104326552A CN104326552A CN201410607312.9A CN201410607312A CN104326552A CN 104326552 A CN104326552 A CN 104326552A CN 201410607312 A CN201410607312 A CN 201410607312A CN 104326552 A CN104326552 A CN 104326552A
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- Prior art keywords
- gate
- inlet channel
- reverse
- drainage ditch
- channel
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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
- 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
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a reverse-flow ecological purification tank for irrigated area drainage channels, which comprises a gate, a reverse-flow water inlet channel, purification tanks, a reverse-flow water outlet channel, a diversion wall and an ecological purifying box, wherein the purification tanks are symmetrically arranged on both sides of the agricultural drainage channel and communicated with the agricultural drainage channel through the reverse-flow water inlet channel and reverse-flow water outlet channel; a gate is arranged on the agricultural drainage channel at the inlet of the reverse-flow water inlet channel; and the center of the drainage channel on the upstream side of the gate is provided with the wedged diversion wall. The opening of the gate is regulated, so that the agricultural sewage performs dynamic loop flow in the agricultural drainage channel, reverse-flow water inlet channel, purification tanks and reverse-flow water outlet channel, thereby achieving the goal of multiple purification times. The reverse-flow structure can obviously prolong the average hydraulic power retention time of the sewage in the purification tanks, enhances the water purification efficiency, has the advantages of small occupied area and high purification efficiency, is simple to manufacture and convenient for maintenance, and does not influence the original flood drainage function of the agricultural drainage channel.
Description
Technical field
The present invention relates to a kind of return-flow type ecological purification pond being applicable to irrigated area escape canal, belong to control techniques field, source, face, farmland.
Background technology
In Agricultural Activities, pollutent that is that dissolve or solid, as the organic or inorganic material such as the grogs in farmland, nitrogen, phosphorus element, agricultural chemicals heavy metal, rural area fowl and animal excrement and domestic refuse, from unspecific region, under precipitation and runoff souring, enter into downstream receiving water body by agricultural surface runoff, farmland drainage and underground leakage, thus cause large-area water body environment pollution, generation and the diffusion way of this pollution are called widespread pollution from the overuse of fertilizers and pesticides in rural area.China is as agriculture production big country, scale of agricultural production and level are to developing fast in recent years, cultivated area increases substantially, thus cause the phenomenon of excessive fertilization serious, and be difficult to reverse rapidly in a short time, nitrogen in soil, phosphorus eutrophication also will continue intensification, will be growing on and on to the potential threat of body eutrophication in farmland.Therefore, widespread pollution from the overuse of fertilizers and pesticides in rural area has become the first source of pollution of China's dystrophication, causes serious consequence to ecosystem function, human health and Economic development etc.
Ecological reestablishment is that a kind of Principles of Ecosystem that utilizes carries out the method for repair mode to impaired water body.By setting up the mutual of water body and periphery ecotope, such that ecosystem energy teaching display stand is coordinated, the benign cycle of self―sustaining and self-succession.The river Hu Ku that countries in the world researchist is serious to eutrophication has carried out a large amount of restoration of the ecosystem experimental studies, demonstrates the validity of restoration of the ecosystem fully.But, the research of current majority mainly concentrates on falls dirty aspect to the antifouling of pollutent receiving water body (as lake and reservoir etc.), although also achieve certain regulation effect, but from the angle of Pollution abatement, these all belong to end treatment, for the uncontrollable pollutant sources of end treatment measure, the problem of body eutrophication therefore fundamentally can not be solved.How from control N, P pollutent in source (i.e. irrigated area, the farmland) scope of area source pollutants to the migration in downstream and diffusion, will the effect of getting twice the result with half the effort be had for water environment treatment, there is important scientific meaning and using value.
Agriculture drainage ditch is modal farmland discharging-irrigating facility in agricultural irrigation area, and ditch reticular density is large, and area generally accounts for about 3% of total land area, and in these agriculture drainage ditchs, use ecological resistance control techniques can the effectively diffusion of decreasing pollution thing and migration.At present, in agriculture drainage ditch, arrange concentrated ecological purification pond is a kind of conventional ecology resistance control method, planting aquatic plants or lay some refining plants in treating pond, as biopurification case etc., current are utilized to retain by the series of physical chemical reaction occurred during refining plant and reduce Pollutant levels.This method can reduce the pollution of area source that farmland nutrient loss causes downstream water effectively, and safeguards comparatively simple and convenient, easy to implement.But find in force, the purification efficiency for the treatment of pond directly depends on the reaction times of sewage and refining plant, in order to extend the hydraulic detention time of sewage in treating pond, treating pond needs larger volume just can reach purification requirement, but takies and a large amount of plough that to build Large Copacity treating pond be inappropriate.Therefore, under ensureing that treating pond has the prerequisite of higher purification efficiency, reduce the floor space for the treatment of pond, this has good practical significance to ecological purification pond promoting the use of in agricultural area source is administered as far as possible.
Summary of the invention
The present invention proposes a kind of return-flow type ecological purification pond being applicable to irrigated area escape canal, have that floor space is little, hydraulic detention time long, the advantage such as easy to maintenance, good purification, its objective is for purifying the eutrophic water of discharging from farmland, reduce widespread pollution from the overuse of fertilizers and pesticides in rural area to the pollution of downstream water, block water the flood season that simultaneously effectively can solve current purifying method problem.
Technical solution of the present invention: comprise gate, backflow inlet channel, treating pond, recycling effluent canal, divider wall, stream wall and ecological purifying box; Described treating pond, backflow inlet channel and recycling effluent canal are opened in the both sides of agriculture drainage ditch all symmetrically, described treating pond is communicated with agriculture drainage ditch with recycling effluent canal by backflow inlet channel, described gate installation is on the agriculture drainage ditch of backflow inlet channel ingress, described divider wall is arranged on the agriculture drainage ditch center line of gate upstream side, arrange one piece in the middle part of described treating pond and stream wall, and place several ecological purifying boxes, described in stream the median perpendicular of wall and agriculture drainage ditch.
Above-mentioned backflow inlet channel and recycling effluent canal are all opened in agriculture drainage ditch, and be communicated with agriculture drainage ditch, the aperture position of recycling effluent canal is positioned at the upstream of backflow inlet channel aperture position, and backflow inlet channel, treating pond and recycling effluent canal form the cascaded structure be interconnected.
Above-mentioned gate is two panels opposite opened structure, and the water inlet of backflow inlet channel should be positioned at the upstream side of gate, and the open degree of gate is adjustable, and the entrance of backflow inlet channel can be closed after opening completely by gate.
Above-mentioned divider wall is wedge structure, and the thin-walled end of divider wall points to the updrift side of agriculture drainage ditch, and heavy wall end points to the downstream direction of agriculture drainage ditch.
Above-mentioned ecological purifying box is permeable structure, comprise net cage lid, biologic packing material ball, net cage body and activated carbon filter layer, described biologic packing material ball is stacked in net cage body, and described activated carbon filter layer is vertically positioned in net cage body, and is distributed in distance with biologic packing material ball.
Above-mentioned biologic packing material ball makes hollowed out spherical by polyolefin plastics, ball built with the biologic packing material of polyurethane matrix, the pollution substances such as N, P of being used in planar water.
The beneficial effect that the present invention reaches:
1, the present invention adopts return-flow type structure, make rural sewage can carry out dynamic circulation flowing in agriculture drainage ditch, backflow inlet channel, treating pond and recycling effluent canal, to reach the object repeatedly purified, the mean residence time of sewage in treating pond is 2 ~ 3 times of common purifying pond, has the advantage of good purification.Simultaneously because treating pond utilising efficiency is high, treating pond area can suitably reduce, and improves land use rate.
2, the present invention regulates the water yield and the velocity of flow of backflow by changing the open degree of gate, is suitable for the purifying treatment of rural sewage under different times, different drain discharge.
3, in the farmland water drainage phase, gate can be opened completely, water can be discharged by gate fast and can not have influence on the conveyance capacity of agriculture drainage ditch.Now refluxing inlet channel entrance can by closing gate, and water can not enter into backflow inlet channel, thus the ecological purifying box effectively protected in treating pond is destroyed from mass-flow impacts.
4, the present invention can reconstruct on original farmland drainage gate and channel basis, and change little to original gate and channel, construction cost is low, easy construction.
5, for the occasion of heavy contamination, the present invention should carry out the series connection of many treating ponds and use, and improves decontamination effect improving further.
Accompanying drawing explanation
Accompanying drawing 1 is vertical view of the present invention (backflow canal is in opened condition).
Accompanying drawing 2 is vertical view of the present invention (backflow canal is in closing condition).
Accompanying drawing 3 is A-A sectional views of Fig. 1.
Accompanying drawing 4 is B-B sectional views of Fig. 1.
Accompanying drawing 5 is ecological purifying box structure iron.
In figure 1 to be gate, 2 be backflow inlet channel, 3 is divider walls, 4, and to be treating ponds, 5 be that to stream wall, 6 are ecological purifying boxes, 7 are recycling effluent canals, 8 are farmland drainage canals, 9 are water (flow) directions, 10 are farmlands, 11 are water channel side slopes, 12 are canal beds, 13 are channel water faces, 14 are net cage lids, 15 are biologic packing material balls, 16 are net cage bodies, 17 is activated carbon filter layers.
Embodiment
Below in conjunction with embodiment and accompanying drawing, technical solution of the present invention is described in further detail, but protection scope of the present invention is not limited to described embodiment.
As shown in Figure 1, Figure 2, shown in Fig. 3, Figure 4 and 5, a kind of return-flow type ecological purification pond being applicable to irrigated area escape canal comprises gate 1, backflow inlet channel 2, treating pond 4, recycling effluent canal 7, divider wall 3, streams wall 5 and ecological purifying box 6.
The both sides being opened in agriculture drainage ditch 8 of above-mentioned treating pond 4 symmetry, treating pond 4 is not directly communicated with agriculture drainage ditch 8, be provided with one piece in the middle part for the treatment of pond 4 and stream wall 5, and place several ecological purifying boxes 6, stream the median perpendicular of wall 5 and agriculture drainage ditch 8.
The both sides being opened in agriculture drainage ditch 8 of above-mentioned backflow inlet channel 2 and recycling effluent canal 7 symmetry, backflow inlet channel 2 and recycling effluent canal 7 are all opened on agriculture drainage ditch 8, and be communicated with agriculture drainage ditch 8, the aperture position of recycling effluent canal 7 is positioned at the upstream of backflow inlet channel 2 aperture position, backflow inlet channel 2, treating pond 4 and recycling effluent canal 7 form the cascaded structure be interconnected, and treating pond 4 is communicated with agriculture drainage ditch 8 with recycling effluent canal 7 by backflow inlet channel 2.
Above-mentioned gate 1 is steel two panels opposite opened structure, is installed on the agriculture drainage ditch 8 of backflow inlet channel 2 water inlet, and the water inlet of backflow inlet channel 2 is positioned at the upstream side of gate 1.The open degree of gate 1 is adjustable, and the monolithic lock leaf width of gate 1 is identical with the water inlet width passing back into water channel 2, and the entrance of backflow inlet channel 2 can be closed after opening completely by gate 1.
Above-mentioned divider wall 3 is wedge structure, adopts Steel Concrete to build on canal bed 12.Divider wall 3 is arranged at the upstream side of gate 1, is positioned on the medullary ray of agriculture drainage ditch 8, and the water inlet of close backflow inlet channel 2.The thin-walled end of divider wall 3 points to the updrift side of agriculture drainage ditch 8, and heavy wall end points to the downstream direction of agriculture drainage ditch 8, and this shape is conducive to current and enters into backflow inlet channel 2.
Above-mentioned purifying box 6 is permeable structure, as shown in Figure 5, comprises net cage lid 14, biologic packing material ball 15, net cage body 16 and activated carbon filter layer 17.Above-mentioned net cage lid 14 and net cage body 16 adopt pvc pipe and nylon wire to make, and net cage lid 14 can be opened or close, and facilitate the replacing of Internal biological filling ball 15 and activated carbon filter layer 17.Above-mentioned biologic packing material ball 15 makes hollowed out spherical by polyolefin plastics, ball built with the biologic packing material of polyurethane matrix, the pollution substances such as N, P of being used in planar water.Biologic packing material ball 15 is stacked in net cage body 16.Above-mentioned activated carbon filter layer 17 is vertically positioned in net cage body 16, and is distributed in distance with biologic packing material ball 15.
Principle of work of the present invention:
In day-to-day operation, gate 1 keeps certain open degree, and the current in agriculture drainage ditch 8 are separated into symmetrical left and right two-way (water (flow) direction 9 as shown in Figure 1) by divider wall 3, and current move along the wedge surface current of divider wall 3, produce obliquely flow speed.Flow through the part of the current after divider wall 3 to be flowed out by the opening of gate 1, another part water can flow in backflow inlet channel 2.Because the open degree of gate 1 is less, flow resistance is comparatively large, will produce a certain amount of water surface harmony high at the upstream side of gate 1.And the flow resistance now refluxed in inlet channel 2 is less, therefore current more easily flow in backflow inlet channel 2.Current flow in treating pond 4 along backflow inlet channel 2, treating pond 4 has certain water capacity, sewage betwixt velocity of flow is slow, and streaming wall 5 and can change the flowing-path of sewage in treating pond 4 in treating pond 4, be conducive to the nutritive substance in water and the microbial film in biologic packing material ball 15 carries out sufficient physical-chemical reaction.Microbial film in biologic packing material ball 15 can retain and adsorb the easy biodegradable organism such as N, P in rural sewage, and active carbon filtration layer 17 partly can remove the hardly degraded organic substance such as heavy metal element, free chlorine, phenol in water body, simultaneously also can algae in filtering water body and partial particulate suspended substance.The water flowed out from treating pond 4 flow back into again the upstream position of farmland drainage canal 8 by recycling effluent canal 7, thus completes once back-flow scrubbing process.Water meeting in the agriculture drainage ditch 8 constantly above-mentioned back-flow scrubbing process of circulation, thus the mean hydraulic residence time of effective prolongation sewage in treating pond 4, the Pollutant levels in reduction sewage.By the adjustable backflow water yield by treating pond 4 of open degree changing gate 1, to adapt to the Pollutant levels of agriculture drainage ditch 8 at different times and the change of drain discharge.At irrigated area flooding period, can starting gate 1 completely, reduce gate to the resistance of current, the entrance of the inlet channel 2 that simultaneously refluxes is closed by gate 1, and water (flow) direction 9 is now as shown in Figure 2.Current are flowed out by gate 1 fast, and can not enter into backflow inlet channel 2, and be subject to water impact from avoiding ecological purifying box 6 and cause biofilm structure to damage, therefore during draining flooded fields, ecological purifying box 6 need not take out, and alleviates the workload of maintenance.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from spirit of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1. be applicable to a return-flow type ecological purification pond for irrigated area escape canal, it is characterized in that: comprise gate, backflow inlet channel, treating pond, recycling effluent canal, divider wall, stream wall and ecological purifying box; Described treating pond, backflow inlet channel and recycling effluent canal are opened in the both sides of agriculture drainage ditch all symmetrically, described treating pond is communicated with agriculture drainage ditch with recycling effluent canal by backflow inlet channel, described gate installation is on the agriculture drainage ditch of backflow inlet channel ingress, described divider wall is arranged on the agriculture drainage ditch center line of gate upstream side, arrange one piece in the middle part of described treating pond and stream wall, and place several ecological purifying boxes, described in stream the median perpendicular of wall and agriculture drainage ditch.
2. a kind of return-flow type ecological purification pond being applicable to irrigated area escape canal according to claim 1, it is characterized in that: described backflow inlet channel and recycling effluent canal are all opened in agriculture drainage ditch, and be communicated with agriculture drainage ditch, the aperture position of recycling effluent canal is positioned at the upstream of backflow inlet channel aperture position, and backflow inlet channel, treating pond and recycling effluent canal form the cascaded structure be interconnected.
3. a kind of return-flow type ecological purification pond being applicable to irrigated area escape canal according to claim 1, it is characterized in that: described gate is two panels opposite opened structure, the water inlet of backflow inlet channel should be positioned at the upstream side of gate, the open degree of gate is adjustable, and the entrance of backflow inlet channel can be closed after opening completely by gate.
4. a kind of return-flow type ecological purification pond being applicable to irrigated area escape canal according to claim 1, it is characterized in that: described divider wall is wedge structure, the thin-walled end of divider wall points to the updrift side of agriculture drainage ditch, and heavy wall end points to the downstream direction of agriculture drainage ditch.
5. a kind of return-flow type ecological purification pond being applicable to irrigated area escape canal according to claim 1, it is characterized in that: described ecological purifying box is permeable structure, comprise net cage lid, biologic packing material ball, net cage body and activated carbon filter layer, described biologic packing material ball is stacked in net cage body, described activated carbon filter layer is vertically positioned in net cage body, and is distributed in distance with biologic packing material ball.
6. a kind of return-flow type ecological purification pond being applicable to irrigated area escape canal according to claim 5, it is characterized in that: described biologic packing material ball makes hollowed out spherical by polyolefin plastics, ball built with the biologic packing material of polyurethane matrix, the pollution substances such as N, P of being used in planar water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410607312.9A CN104326552B (en) | 2014-10-31 | 2014-10-31 | A kind of return-flow type ecological purification pond being applicable to irrigated area escape canal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410607312.9A CN104326552B (en) | 2014-10-31 | 2014-10-31 | A kind of return-flow type ecological purification pond being applicable to irrigated area escape canal |
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| Publication Number | Publication Date |
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| CN104326552A true CN104326552A (en) | 2015-02-04 |
| CN104326552B CN104326552B (en) | 2016-04-06 |
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| CN201410607312.9A Expired - Fee Related CN104326552B (en) | 2014-10-31 | 2014-10-31 | A kind of return-flow type ecological purification pond being applicable to irrigated area escape canal |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107662978A (en) * | 2017-10-12 | 2018-02-06 | 天津大学 | A kind of renewable filler filter cylinder intercepted applied to agricultural ecological irrigation canals and ditches nitrogen phosphorus |
| CN108529778A (en) * | 2018-06-05 | 2018-09-14 | 中国科学院南京土壤研究所 | The preposition purification system of agricultural run-off drain moduleization |
| CN108557922A (en) * | 2018-06-05 | 2018-09-21 | 中国科学院南京土壤研究所 | The buried preposition purification system of farmland water-break |
| CN110476529A (en) * | 2019-07-19 | 2019-11-22 | 上海市农业科学院 | A kind of breeding combination agricultural ecological Scene construction method |
| CN113387509A (en) * | 2021-06-10 | 2021-09-14 | 河海大学 | Multistage farmland drainage ditch ecological remediation system |
| CN115726323A (en) * | 2022-12-02 | 2023-03-03 | 西北大学 | Ecological ditch capable of being ecologically restored |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0159340B1 (en) * | 1983-10-17 | 1988-04-13 | Varosepitesi Tudomanyos Es Tervezo Intezet | Process for protecting lakes against eutrophization caused by subsoil water |
| CN102094407A (en) * | 2010-12-31 | 2011-06-15 | 中国科学院南京土壤研究所 | Farmland runoff pollution ecological intercepting ditch |
| CN104003574A (en) * | 2014-05-21 | 2014-08-27 | 河海大学常州校区 | Labyrinth-type ecological purification pool suitable for drainage ditch in farmland |
-
2014
- 2014-10-31 CN CN201410607312.9A patent/CN104326552B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0159340B1 (en) * | 1983-10-17 | 1988-04-13 | Varosepitesi Tudomanyos Es Tervezo Intezet | Process for protecting lakes against eutrophization caused by subsoil water |
| CN102094407A (en) * | 2010-12-31 | 2011-06-15 | 中国科学院南京土壤研究所 | Farmland runoff pollution ecological intercepting ditch |
| CN104003574A (en) * | 2014-05-21 | 2014-08-27 | 河海大学常州校区 | Labyrinth-type ecological purification pool suitable for drainage ditch in farmland |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107662978A (en) * | 2017-10-12 | 2018-02-06 | 天津大学 | A kind of renewable filler filter cylinder intercepted applied to agricultural ecological irrigation canals and ditches nitrogen phosphorus |
| CN108529778A (en) * | 2018-06-05 | 2018-09-14 | 中国科学院南京土壤研究所 | The preposition purification system of agricultural run-off drain moduleization |
| CN108557922A (en) * | 2018-06-05 | 2018-09-21 | 中国科学院南京土壤研究所 | The buried preposition purification system of farmland water-break |
| CN110476529A (en) * | 2019-07-19 | 2019-11-22 | 上海市农业科学院 | A kind of breeding combination agricultural ecological Scene construction method |
| CN113387509A (en) * | 2021-06-10 | 2021-09-14 | 河海大学 | Multistage farmland drainage ditch ecological remediation system |
| CN115726323A (en) * | 2022-12-02 | 2023-03-03 | 西北大学 | Ecological ditch capable of being ecologically restored |
| CN115726323B (en) * | 2022-12-02 | 2024-05-28 | 西北大学 | Ecological restoration type ecological ditch |
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| CN104326552B (en) | 2016-04-06 |
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Granted publication date: 20160406 Termination date: 20181031 |