CN112897803A - Ecological soil purification bed of farmland non-point source pollution - Google Patents

Ecological soil purification bed of farmland non-point source pollution Download PDF

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Publication number
CN112897803A
CN112897803A CN202110062493.1A CN202110062493A CN112897803A CN 112897803 A CN112897803 A CN 112897803A CN 202110062493 A CN202110062493 A CN 202110062493A CN 112897803 A CN112897803 A CN 112897803A
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layer
soil
purification
water
point source
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郭玥
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B11/00Drainage of soil, e.g. for agricultural purposes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001Runoff or storm water
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06Contaminated groundwater or leachate
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C02F3/327Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Cultivation Of Plants (AREA)

Abstract

The invention relates to the technical field of farmland non-point source pollution, and discloses a farmland non-point source pollution ecological soil purification bed which comprises a hard soil layer, wherein a sand soil layer is fixedly installed at the top of the hard soil layer, a sand purification layer is paved at the top of the sand soil layer, a fertile soil planting layer is paved at the top of the sand purification layer, two water storage pipelines are paved in the sand soil layer, water seepage holes are formed in the top of the water storage pipelines, permeable membranes are paved on the inner wall of the water storage pipelines, and ditch grooves are formed in the fertile soil planting layer. This ecological soil of farmland non-point source pollution purifies bed, the upper water after the filtration is discharged into the active carbon filter layer through the apopore and is filtered once more and store in the ditch inslot is discharged to the drain pipe, and then has guaranteed that the extraction pump takes out the sewage purification liquid medicine of explosive box and has sprayed the biological planting layer of cooperation purification to the ditch inslot through spraying mechanism and purify the water of storing once more, and then has guaranteed the purification treatment cyclic utilization at planting district internal water source.

Description

Ecological soil purification bed of farmland non-point source pollution
Technical Field
The invention relates to the technical field of farmland non-point source pollution, in particular to a farmland non-point source pollution ecological soil purification bed.
Background
The non-point source pollution is also called non-point source pollution, mainly comprises soil silt particles, nutrient substances such as nitrogen and phosphorus, pesticides, various atmospheric particulates and the like, enters water, soil or atmospheric environment in the modes of surface runoff, soil erosion, farmland drainage and the like, and has the characteristics of randomness, universality, hysteresis, fuzziness, latency and the like, so that the difficulty of making corresponding research, treatment and management policies is increased.
Along with the development of times and science and technology, the technological progress of the ecological soil purification bed for farmland non-point source pollution is promoted simultaneously by the progress of science and technology, but the defect still exists, and the existing ecological soil purification bed for farmland non-point source pollution is simple in structure, cannot achieve good purification effect on farmland sewage, is not convenient for water storage and promotion of water recycling and cyclic treatment, so that the ecological soil purification bed for farmland non-point source pollution is provided for solving the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a farmland non-point source pollution ecological soil purification bed which has the advantages of facilitating storage, utilization and treatment of water and the like, and solves the problems that the existing farmland non-point source pollution ecological soil purification bed has a simple structure, cannot achieve a good purification effect on farmland sewage, and is inconvenient for water storage and promotion of water recycling and treatment.
(II) technical scheme
In order to realize the purpose of facilitating the storage, utilization and treatment of water, the invention provides the following technical scheme: the utility model provides a farmland non-point source pollutes ecological soil and purifies bed, includes the stereoplasm soil layer, the top fixed mounting on stereoplasm soil layer has sand layer, the grit has been laid at sand layer's top and has been purified the layer, the grit has been purified the top on layer and has been laid fertile soil and plant the layer, the retaining pipeline that the quantity is two has been laid in the sand soil layer, the infiltration hole has been seted up at retaining pipeline's top, the osmotic membrane has been laid to retaining pipeline's inner wall, fertile soil is planted and has been seted up the ditch groove in situ, the biological planting layer of purification has been laid in the ditch groove, fertile soil is planted and is provided with earthworm cultivation layer on the layer, fertile soil is planted the outside of layer and is surrounded and is provided with the purification tank, the inside fixed mounting of purification tank has the cement division board that the quantity is two, activated carbon filter layer, sand filtration layer and the coarse sand layer with the cement division board contact have been, the cement isolation plate is provided with a water outlet hole, a spraying mechanism positioned above the ditch groove is fixedly arranged between the inner sides of the purification tanks, the bottom of the spraying mechanism is communicated with a nozzle head, a medicine storage box is fixedly arranged on the left side of the purifying tank, an extraction pump is fixedly arranged in the medicine storage box, a water outlet of the extraction pump is communicated with a connecting pipe communicated with the spraying mechanism, the bottom of the inner side of the purification tank is communicated with a drain pipe positioned above the ditch groove, the front side and the rear side of the water storage pipeline are respectively inserted with a sealing cover, an isolation filter screen is embedded in the sealing cover at the front side, a pipeline contacted with the isolation filter screen is communicated between the two sealing covers at the front side, the right side fixed mounting of purification tank has the water pump, the inlet port department intercommunication of water pump has the inlet tube with the pipeline intercommunication, the drain outlet department intercommunication of water pump has the drainage pipe who is located the purification tank top.
Preferably, hold the water pipe and be hollow cylinder, be bilateral symmetry and distribute, and the infiltration hole sets up in the last semicircle department that holds the water pipe, and the infiltration hole be annular equidistance and distribute.
Preferably, the permeable membrane is a hollow cylinder, and the permeable membrane is tightly attached to the inner wall of the water storage pipeline.
Preferably, the purification biological planting layer consists of water hyacinth and lotus leaves, and the water hyacinth and the lotus leaves are distributed in a staggered manner.
Preferably, the thickness of the earthworm cultivation layer is thirty centimeters, the width of the earthworm cultivation layer is half a meter, and the number of the earthworm cultivation layers is not less than five, and the earthworm cultivation layers are distributed at equal intervals.
Preferably, the inner side of the water outlet hole is positioned below the cement isolation plate, and the outer side of the water outlet hole is positioned above the cement isolation plate and is in contact with the top of the activated carbon filter layer.
Preferably, the spraying mechanism consists of two spraying pipes and two spraying heads, and the bottom parts of the left side and the right side of each spraying pipe are communicated with the spraying heads.
Preferably, the drain pipe contacts with the bottom wall of the inner cavity of the purification tank, the purification tank surrounds the outer side of the fertile soil planting layer, and the top of the purification tank is fixedly provided with an impurity isolation net.
Preferably, the ditch groove surrounds the outer side of the fertile soil planting layer, and is one meter deep and fifty centimeters wide.
(III) advantageous effects
Compared with the prior art, the invention provides a farmland non-point source pollution ecological soil purification bed, which has the following beneficial effects:
1. this ecological soil of farmland non-point source pollution purifies bed, through the infiltration hole that sets up to having realized that the water in the soil is stored in discharging into water storage pipeline through the infiltration hole, here water pump, pipeline, intercommunication each other between inlet tube and the drainage pipe have realized that water pump work takes out through the water that the pipeline will hold in the water storage pipeline, and the drainage pipe is discharged and is stored to the ditch inslot, avoids the loss of water, has realized the storage cyclic utilization to water.
2. The farmland non-point source pollution ecological soil purification bed realizes the purification treatment of sewage in planting soil and then discharges the sewage into a water storage pipeline through a water seepage hole for storage through the sand purification layer and the earthworm breeding layer, at the same time, the water is pumped out and discharged into the ditch groove for storage, and meanwhile, outside surface water source flows into the purification pool in rainy days, meanwhile, the sewage is primarily purified through the coarse sand layer, permeates to the bottom of the purifying tank and is discharged into the sand filtering layer through the water outlet hole to be filtered and purified again, meanwhile, the filtered upper water is discharged into the active carbon filter layer through the water outlet hole for secondary filtering and then is discharged into the ditch groove through the drain pipe for storage, and then guaranteed that the draw-out pump takes out the sewage purification liquid medicine of explosive box and sprays to the ditch inslot cooperation through spraying mechanism and purifies biological planting layer and purify the water of storing once more, and then guaranteed the purification treatment cyclic utilization of planting the interior water source of district.
Drawings
FIG. 1 is a sectional view of a farmland non-point source pollution ecological soil purification bed provided by the present invention;
FIG. 2 is a schematic structural view showing the connection between a water storage pipe and a cover cap of a farmland non-point source pollution ecological soil purification bed provided by the invention;
FIG. 3 is a schematic structural view of the connection between the cover and the pipe of the farmland non-point source pollution ecological soil purification bed provided by the invention.
In the figure: 1 stereoplasm soil layer, 2 sandy soil layer, 3 grit purification layers, 4 soil planting layer, 5 hold the water pipe, 6 infiltration holes, 7 osmotic membranes, 8 ditch grooves, 9 purify biological planting layer, 10 earthworm breed layer, 11 purification tanks, 12 cement division boards, 13 coarse sand layer, 14 filter sand layers, 15 active carbon filter layers, 16 apopores, 17 spray mechanism, 18 nozzle head, 19 explosive box, 20 extraction pump, 21 connecting pipe, 22 drain pipes, 23 closing cap, 24 isolation filter screen, 25 pipelines, 26 water pump, 27 inlet tubes, 28 drainage pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, a farmland non-point source pollution ecological soil purification bed comprises a hard soil layer 1, a sand soil layer 2 is fixedly installed on the top of the hard soil layer 1, a sand purification layer 3 is paved on the top of the sand soil layer 2, a fertile soil planting layer 4 is paved on the top of the sand purification layer 3, two water storage pipelines 5 are paved in the sand soil layer 2, water seepage holes 6 are formed on the top of the water storage pipelines 5, the water storage pipelines 5 are hollow cylinders and are symmetrically distributed left and right, the water seepage holes 6 are arranged on the upper semicircle of the water storage pipelines 5, the water seepage holes 6 are distributed in an annular shape at equal intervals, a permeable membrane 7 is paved on the inner wall of the water storage pipeline 5, the permeable membrane 7 is a hollow cylinder, the permeable membrane 7 is tightly attached to the inner wall of the water storage pipeline 5, a ditch groove 8 is formed in the fertile soil planting layer 4, the ditch groove 8 surrounds the outer side of the fertile soil planting layer 4, the ditch groove 8 is one meter deep and fifty centimeters wide, a purifying biological planting layer 9 is laid in the ditch groove 8, the purifying biological planting layer 9 consists of water hyacinth and lotus leaves which are distributed in a staggered mode, an earthworm breeding layer 10 is arranged on the fertile soil planting layer 4, the thickness of the earthworm breeding layer 10 is thirty centimeters, the width of the earthworm breeding layer is half a meter, the number of the earthworm breeding layers 10 is not less than five, the earthworm breeding layers are distributed equidistantly, a purifying tank 11 is arranged around the outside of the fertile soil planting layer 4, two cement isolation plates 12 are fixedly arranged in the purifying tank 11, an active carbon filter layer 15, a sand filter layer 14 and a coarse sand layer 13 which are contacted with the cement isolation plates 12 are sequentially laid in the purifying tank 11 from the inner side to the outer side, water outlets 16 are formed in the cement isolation plates 12, the water outlets 16 on the inner side are positioned below the cement isolation plates 12, the water outlets 16 on the outer side are positioned above the cement isolation plates 12 and are contacted with the tops of the active, a spraying mechanism 17 positioned above the channel 8 is fixedly arranged between the inner sides of the purifying tank 11, the spraying mechanism 17 consists of a spraying pipe and two spraying heads, the spraying heads are communicated with the bottoms of the left side and the right side of the spraying pipe, a spraying pipe head 18 is communicated with the bottom of the spraying mechanism 17, a medicine storage box 19 is fixedly arranged on the left side of the purifying tank 11, an extraction pump 20 is fixedly arranged in the medicine storage box 19, a connecting pipe 21 communicated with the spraying mechanism 17 is communicated with a water outlet of the extraction pump 20, a water outlet pipe 22 positioned above the channel 8 is communicated with the bottom of the inner side of the purifying tank 11, the water outlet pipe 22 is contacted with the bottom wall of the inner cavity of the purifying tank 11, the purifying tank 11 surrounds the outer side of the fertile soil planting layer 4, an impurity isolation net is fixedly arranged at the top of the purifying tank 11, sealing covers 23 are respectively inserted on the front side and the rear side of the water storage pipe 5, an isolation filter screen 24 is embedded in the front side sealing cover 23, a pipeline, a water pump 26 is fixedly arranged on the right side of the purification tank 11, a water inlet pipe 27 communicated with the pipeline 25 is communicated with a water inlet of the water pump 26, and a water outlet of the water pump 26 is communicated with a water drainage pipeline 27 positioned above the purification tank 11.
In conclusion, this ecological soil purification bed of farmland non-point source pollution, through the infiltration hole 6 that sets up to realized that the water in the soil is stored in discharging into water storage pipe 5 through infiltration hole 6, here water pump 26, pipeline 25, intercommunication each other between inlet tube 27 and the drainage pipe 28 have realized that water pump 26 work takes out the water in water storage pipe 5 through pipeline 25, discharges into to ditch groove 8 through drainage pipe 28 and stores, avoids the loss of water, has realized the storage cyclic utilization to water.
Moreover, through the sand purification layer 3 and the earthworm cultivation layer 10, the sewage in the planting soil is purified and then is discharged into the water storage pipeline 5 through the water seepage hole 6 for storage, and is simultaneously pumped out and discharged into the ditch groove 8 for storage, meanwhile, the outside surface water source flows into the purification pool 11 in rainy days, simultaneously the sewage is primarily purified through the coarse sand layer 13, the sewage permeates to the bottom of the purification pool 11 and is discharged into the sand filtration layer 14 through the water outlet hole 16 for secondary filtration and purification, simultaneously the filtered upper water is discharged into the active carbon filter layer 15 through the water outlet hole 16 for secondary filtration and is discharged into the ditch groove 8 through the water outlet pipe 22 for storage, and further the sewage purification liquid medicine of the medicine storage box 19 is pumped out by the suction pump 20 and is sprayed into the ditch groove 8 through the spraying mechanism 17 to be matched with the purification biological planting layer 9 for secondary purification of the stored water, and then guaranteed the purification treatment cyclic utilization of planting the interior water source of district, solved present farmland non-point source and polluted ecological soil and purified bed simple structure, can not reach good purifying effect to farmland sewage, be not convenient for carry on the water storage simultaneously and promote the cyclic utilization of water and cyclic treatment's problem.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a farmland non-point source pollutes ecological soil and purifies bed, includes stereoplasm soil layer (1), its characterized in that: the top fixed mounting of stereoplasm soil layer (1) has sand soil layer (2), grit purification layer (3) has been laid at the top of sand soil layer (2), the top that grit purified layer (3) has been laid fertile soil and has been planted layer (4), water storage pipeline (5) that quantity is two have been laid in sand soil layer (2), infiltration hole (6) have been seted up at the top of water storage pipeline (5), osmotic membrane (7) have been laid to the inner wall of water storage pipeline (5), ditch groove (8) have been seted up in fertile soil planting layer (4), purification biological planting layer (9) have been laid in ditch groove (8), fertile soil planting layer (4) is last to be provided with earthworm cultivation layer (10), the encircleing of fertile soil planting layer (4) is provided with purification tank (11), the inside fixed mounting of purification tank (11) has cement division board (12) that quantity is two, the activated carbon filter layer (15), the sand filtering layer (14) and the coarse sand layer (13) which are contacted with the cement isolation board (12) are sequentially paved from the inner side to the outer side in the purification tank (11), a water outlet hole (16) is formed in the cement isolation board (12), a spraying mechanism (17) which is positioned above the ditch groove (8) is fixedly installed between the inner sides of the purification tank (11), a nozzle head (18) is communicated with the bottom of the spraying mechanism (17), a medicine storage box (19) is fixedly installed on the left side of the purification tank (11), an extraction pump (20) is fixedly installed in the medicine storage box (19), a connecting pipe (21) which is communicated with the spraying mechanism (17) is communicated with the water outlet of the extraction pump (20), a drain pipe (22) which is positioned above the ditch groove (8) is communicated with the bottom of the inner side of the purification tank (11), sealing covers (23) are respectively inserted into the front side and the back side of the water storage pipeline, front side the inside embedding of closing cap (23) has isolation filter screen (24), and the front side is two the intercommunication has pipeline (25) with isolation filter screen (24) contact between closing cap (23), the right side fixed mounting of purification tank (11) has water pump (26), the water inlet department intercommunication of water pump (26) has inlet tube (27) with pipeline (25) intercommunication, the drain outlet department intercommunication of water pump (26) has drainage pipe (28) that are located purification tank (11) top.
2. The ecological soil purification bed for non-point source pollution in agricultural fields as claimed in claim 1, wherein: water storage pipe (5) are hollow cylinder, are bilateral symmetry and distribute, and infiltration hole (6) set up in the last semicircle department of water storage pipe (5), and infiltration hole (6) are annular equidistance and distribute.
3. The ecological soil purification bed for non-point source pollution in agricultural fields as claimed in claim 1, wherein: the permeable membrane (7) is a hollow cylinder, and the permeable membrane (7) is tightly attached to the inner wall of the water storage pipeline (5).
4. The ecological soil purification bed for non-point source pollution in agricultural fields as claimed in claim 1, wherein: the purified biological planting layer (9) is composed of water hyacinth and lotus leaves, and the water hyacinth and the lotus leaves are distributed in a staggered mode.
5. The ecological soil purification bed for non-point source pollution in agricultural fields as claimed in claim 1, wherein: the thickness of the earthworm cultivation layer (10) is thirty centimeters, the width of the earthworm cultivation layer is half a meter, and the number of the earthworm cultivation layers (10) is not less than five, and the earthworm cultivation layers are distributed at equal intervals.
6. The ecological soil purification bed for non-point source pollution in agricultural fields as claimed in claim 1, wherein: the inner side is located below the cement isolation plate (12) and the outer side is located above the cement isolation plate (12) and is in contact with the top of the activated carbon filter layer (15) through the water outlet hole (16).
7. The ecological soil purification bed for non-point source pollution in agricultural fields as claimed in claim 1, wherein: the spraying mechanism (17) is composed of two spraying pipes and two spraying heads, and the bottom parts of the left side and the right side of each spraying pipe are communicated with the spraying heads.
8. The ecological soil purification bed for non-point source pollution in agricultural fields as claimed in claim 1, wherein: the drain pipe (22) is in contact with the bottom wall of the inner cavity of the purification tank (11), the purification tank (11) surrounds the outer side of the fertile soil planting layer (4), and the top of the purification tank (11) is fixedly provided with an impurity isolation net.
9. The ecological soil purification bed for non-point source pollution in agricultural fields as claimed in claim 1, wherein: the ditch groove (8) surrounds the outer side of the fertile soil planting layer (4), and the ditch groove (8) is one meter deep and fifty centimeters wide.
CN202110062493.1A 2021-01-18 2021-01-18 Ecological soil purification bed of farmland non-point source pollution Pending CN112897803A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114906988A (en) * 2022-05-18 2022-08-16 南京林业大学 Landscape pool with ecological environment circulating restoration function in park and restoration method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09206788A (en) * 1996-02-02 1997-08-12 Aisawa Kogyo Kk Water quality purification method and water quality purification apparatus used for the same
JP2001347276A (en) * 2000-06-06 2001-12-18 Nippon Steel Chem Co Ltd Method and system for cleaning culvert agricultural wastewater
CN104612114A (en) * 2015-01-23 2015-05-13 北京师范大学 Method for biological carbon improvement farmland drainage canal lowering intensive agricultural region non-point source pollution
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
CN109970207A (en) * 2019-04-24 2019-07-05 中水北方勘测设计研究有限责任公司 Cut down the ecological canal of agricultural non -point pollution

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09206788A (en) * 1996-02-02 1997-08-12 Aisawa Kogyo Kk Water quality purification method and water quality purification apparatus used for the same
JP2001347276A (en) * 2000-06-06 2001-12-18 Nippon Steel Chem Co Ltd Method and system for cleaning culvert agricultural wastewater
CN104612114A (en) * 2015-01-23 2015-05-13 北京师范大学 Method for biological carbon improvement farmland drainage canal lowering intensive agricultural region non-point source pollution
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
CN109970207A (en) * 2019-04-24 2019-07-05 中水北方勘测设计研究有限责任公司 Cut down the ecological canal of agricultural non -point pollution

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114906988A (en) * 2022-05-18 2022-08-16 南京林业大学 Landscape pool with ecological environment circulating restoration function in park and restoration method thereof

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Application publication date: 20210604