CN103288312B - Portable combined constructed wetland purifying box for farmland drainage ditch - Google Patents

Portable combined constructed wetland purifying box for farmland drainage ditch Download PDF

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Publication number
CN103288312B
CN103288312B CN201310283007.4A CN201310283007A CN103288312B CN 103288312 B CN103288312 B CN 103288312B CN 201310283007 A CN201310283007 A CN 201310283007A CN 103288312 B CN103288312 B CN 103288312B
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purifying box
portable combined
farmland drainage
box
district
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CN103288312A (en
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钱进
王沛芳
王超
侯俊
范秀磊
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Hohai University HHU
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Hohai University HHU
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Abstract

The invention relates to a portable combined constructed wetland purifying box for a farmland drainage ditch. The portable combined constructed wetland purifying box is characterized in that a single portable combined constructed wetland purifying box frame is built through reinforcing steel bars, plastic plates and wire gauzes. The purifying box in the frame comprises a micro constructed wetland area, a biological cleaning ball area and an activated carbon adsorption area. Lateral sides of the single portable combined constructed wetland purifying box can be opened so as to facilitate regular replacing of fillers in the box. The portable combined constructed wetland purifying box is small in size, can be placed in the farmland drainage ditch conveniently and is convenient to move. A plurality of portable combined constructed wetland purifying boxes are connected in series and placed in the farmland drainage ditch, and farmland drainage water enters the boxes through water inlets of the purifying boxes and sequentially passes through the lower portions of the biological purifying ball areas, the activated carbon adsorption areas, the upper portions of the biological purifying ball areas and the micro constructed wetland areas to be purified and processed. The portable combined constructed wetland purifying box has the advantages of being capable of reducing the farmland non-point source pollution receiving water eutrophication degree and risks and reducing content of harmful substances such as heavy metal and pesticide residues in the farmland drainage so as to reduce damage of the harmful substances to receiving water aquatic organisms.

Description

The portable combined artificial wetland purifying box of farmland drainage ditch
Technical field
The invention belongs to pollution of area source control techniques field, farmland, be specifically related to a kind of portable combined artificial wetland purifying box that can reduce nitrogen in agriculture drainage ditch, phosphorus, organism, heavy metal and pesticide remnant substrate concentration.
Background technology
A large amount of, irrationally for a long time in agriculture production use the destruction that chemical fertilizer and agricultural chemicals cause ecosystem internal structure, the pollution that the pollutent such as nitrogen, phosphorus, heavy metal, pesticide residue runs off and brings surface water and groundwater water body, has become the large source of pollution that are another main and that be ubiquitous of China's water quality.Nitrogen in farmland drainage, phosphorus nutrition material are the major causes that causes receiving water body eutrophication.The objectionable impuritiess such as residue of heavy metal and agricultural chemicals directly work the mischief to hydrobiont after entering water body, more seriously have some toxic substances can pass through food chain enrichment, make the people in a food chain high position or raise poisoning.Effectively controlling nitrogen, phosphorus concentration in the pollution of area source of farmland is the key measure that reduces farmland pollution of area source receiving water body Eutrophic Extent, reduces in the pollution of area source of farmland the harmful substance contents such as heavy metal, pesticide residue equally very important simultaneously.
Farmland pollution of area source control techniques mainly contains Artificial Wetland Techniques, shore bank buffer strip control techniques, ecological channel purification techniques etc. at present.Artificial Wetland Techniques and shore bank buffer strip control techniques because of its floor space large, be difficult to adapt to the national conditions that China has a large population and a few land, aspect promotion and application, be subject to restriction to a certain degree, especially economically developed people, the particularly thorny this restriction in area even more serious.Ecological canal is a kind of ecological engineering technology that pollution substance in agriculture drainage ditch is carried out to original position ecological intercepting, although preferably landman, contradiction, 201010616311.2 the farmland runoff pollution ecological intercepting ditch of announcing is exactly wherein a kind of, but with Artificial Wetland Techniques, that shore bank buffer strip control techniques has infrastructure project is equally many, the problems such as site operation is complicated, and management difficulty is large.In a word, the promotion and application situation of existing pollution of area source control techniques is unsatisfactory.
Do not need or the less infrastructure project of needs, on-the-spot easy for installation, can be directly used in the shaped device system in irrigation canals and ditches, farmland drainage being purified still rare, it is exactly wherein a kind of that number of patent application 201110036371.1 is announced a kind of method that builds farmland drainage ecological purification system, by at agriculture drainage ditch end, oval ecological buffer zone is set before farmland drainage culvert pipe, in ecological buffer zone, plantation easily absorbs N, the waterplant of P nutritive element, farmland drainage ecological purification cylinder is set in farmland drainage culvert, ecological purification cylinder, biopurification ring is set on purifying tube.Farmland drainage this system of flowing through is purified.But range of application is only applicable to farmland ditch end has drainage culvert, and treatment effect is subject to the impact of drainage culvert length larger, and it is only for the reduction problem of nitrogen and phosphorus content in farmland drainage.There is harmful substance contents functions such as reducing in the pollution of area source of farmland nitrogen, phosphorus and heavy metal, pesticide residue simultaneously and do not need infrastructure project, on-the-spot easy for installation, can be directly used in the technology in irrigation canals and ditches, farmland drainage being purified and still belong to blank.
Summary of the invention
The object of the invention is for farmland pollution of area source control problem, the portable combined artificial wetland case of a kind of farmland drainage ditch is proposed, by put portable combined artificial wetland purifying box in agriculture drainage ditch, effectively control nitrogen, the phosphorus concentration in farmland drainage, thereby reduce farmland pollution of area source receiving water body Eutrophic Extent; Reduce in farmland drainage the harmful substance contents such as heavy metal, pesticide residue to reduce it to the hydrobiological harm of receiving water body.
Technical solution of the present invention: the portable combined artificial wetland purifying box of farmland drainage ditch, it is characterized in that building single portable combined artificial wetland purifying box framework with reinforcing bar, plastic plate, wire netting, the purifying box in this framework comprises miniature Manual moist area, biopurification ball district and charcoal absorption district;
Described miniature artificial swamp district is positioned at casing top, and this district comprises nitrogen, the obvious matrix 4 of phosphorus adsorption effect and waterplant 5;
Described biopurification ball district, be positioned at box house, occupy box house 2/3rds volumes, this district is designed to upper and lower two parts, centre separates with plastic plate, so both increased the residence time of current, avoided again as increasing the infrastructure project that the farmland drainage residence time excavates shunt conduit or regulating sluice is set in irrigation canals and ditches; Upper and lower two parts are evenly overworked nitrogen, phosphorus are held back to the obvious biopurification ball of decontamination effect improving;
Described charcoal absorption district, be positioned at box house, occupy box house 1/3rd volumes, this district is designed to activated carbon absorption box, and activated carbon absorption box is by reinforcing bar, plastic silk screen, plastic plate and heavy metal, the obvious gac of pesticide residue objectionable impurities adsorption effect in farmland drainage are formed;
The lateral layout of described single portable combined artificial wetland purifying box is openable structure, to facilitate filler in periodic replacement case; Activated carbon absorption box is designed to openable equally, to be convenient for changing gac wherein; Intake-outlet place is equipped with wire netting, to prevent that larger suspended substance from entering in case, stops up;
During use, a plurality of portable combined artificial wetland purifying boxs are positioned in agriculture drainage ditch, farmland drainage is entered by purifying box water inlet, through bottom, biopurification ball district, charcoal absorption district, top, biopurification ball district, miniature Manual moist area, be purified processing successively, after the aging or charcoal absorption of microbial film on purifying box operation for some time biopurification ball is full, can easily purifying box be taken out biopurification ball, gac are processed respectively and renewal; During raining or farmland drainage overflow stage flow be to avoid stopping up that irrigation canals and ditches take out the purifying box in agriculture drainage ditch and the drainability that do not affect irrigation canals and ditches when large.
Advantage of the present invention: (1) treatment effect is good, miniature Manual moist area and biopurification ball district in purifying box have reduced the content of nitrogen and phosphorous in the pollution of area source of farmland, have reduced risk and the degree of receiving water body eutrophication; Charcoal absorption district has reduced the harmful substance contents such as heavy metal, pesticide residue in farmland drainage, has reduced it to the hydrobiological harm of receiving water body.(2) without infrastructure project, purifying box inside is divided into upper and lower two parts, and farmland drainage residence time in case is increased, and having avoided is like this infrastructure project of the increase farmland drainage residence time excavating shunt conduit in irrigation canals and ditches or regulating sluice being set; (3) maintenance management is convenient, after the aging or charcoal absorption of microbial film on purifying box operation for some time biopurification ball is full, can easily purifying box is taken out biopurification ball, gac are processed and renewal at the same time or separately.During raining or farmland drainage overflow stage flow be to avoid stopping up that irrigation canals and ditches can take out the purifying box in agriculture drainage ditch and the drainability that do not affect irrigation canals and ditches when large; (4) make simple, cheaply, can realize batch production and produce, be not subject to the restriction in time, season, place etc.
Accompanying drawing explanation
Accompanying drawing 1 is single portable combined artificial wetland purifying box schematic diagram.
Accompanying drawing 2 is single portable combined artificial wetland purifying box sectional views.
Accompanying drawing 3 is biopurification ball suspension members.
Accompanying drawing 4 is activated carbon absorption box sectional views.
Accompanying drawing 5 is that Portable purifying case Constructed Wetland For Purifying case is put schematic diagram.
In figure, 1 is φ 10 reinforcing bars, the 2nd, and woven wire, the 3rd, plastic plate, the 4th, matrix, the 5th, waterplant, the 6th, miniature Manual moist area, the 7th, biopurification ball suspension member, the 8th, biopurification ball, the 9th, plastic silk screen, the 10th, gac, the 11st, activated carbon absorption box, the 12nd, φ 4 reinforcing bars, the 13rd, single portable combined artificial wetland purifying box, the 14th, agriculture drainage ditch, the 15th, water eliminator.
Embodiment
Contrast accompanying drawing, the portable combined artificial wetland purifying box of farmland drainage ditch, it is characterized in that building single portable combined artificial wetland purifying box framework with reinforcing bar, plastic plate, wire netting, change case in this framework comprises miniature Manual moist area, biopurification ball district and charcoal absorption district, described miniature artificial swamp district is positioned at casing top, and this district comprises nitrogen, the obvious matrix 4 of phosphorus adsorption effect and waterplant 5;
Described biopurification ball district, be positioned at box house, occupy box house 2/3rds volumes, this district is designed to upper and lower two parts, centre separates with plastic plate, so both increased the residence time of current, avoided again as increasing the infrastructure project that the farmland drainage residence time excavates shunt conduit or regulating sluice is set in irrigation canals and ditches; Upper and lower two parts are evenly overworked nitrogen, phosphorus are held back to the obvious biopurification ball of decontamination effect improving;
Described charcoal absorption district, be positioned at box house, occupy box house 1/3rd volumes, this district is designed to activated carbon absorption box 11, by reinforcing bar 1, plastic silk screen 9, plastic plate 3 and heavy metal, the obvious gac 10 of pesticide residue objectionable impurities adsorption effect in farmland drainage are formed;
The lateral layout of described single portable combined artificial wetland purifying box is openable structure, to facilitate filler in periodic replacement case; Activated carbon absorption box is designed to openable equally, to be convenient for changing gac wherein; Intake-outlet place is equipped with wire netting 2, to prevent that larger suspended substance from entering in case, stops up;
During use, a plurality of portable combined artificial wetland purifying boxs are positioned in agriculture drainage ditch, farmland drainage is entered by purifying box water inlet, through bottom, biopurification ball district, charcoal absorption district, top, biopurification ball district, miniature Manual moist area 6, be purified processing successively, after the aging or charcoal absorption of microbial film on purifying box operation for some time biopurification ball is full, can easily purifying box be taken out biopurification ball, gac are processed respectively and renewal; During raining or farmland drainage overflow stage flow be to avoid stopping up that irrigation canals and ditches take out the purifying box in agriculture drainage ditch 14 and the drainability that do not affect irrigation canals and ditches when large.
Described matrix 4 is designed to comprise the obvious slag of nitrogen phosphorus adsorption effect in soil, and matrix depth design is 15~20cm, and waterplant 5 is selected Chinese celery economic plants.
Between upper and lower two parts in described biopurification ball district, with plastic plate, separate, it is cross bar that biopurification ball suspension member 7 be take φ 10 reinforcing bars 1, and φ 4 reinforcing bars 12 of take are pole, and biopurification ball 8 is together in series by pole.
Described plastic silk screen 9 is 1:2 or 2:1 with plastic plate 3 Length Ratios, can suitably increase the ratio of plastic silk screen, to increase discharge section area when flow rate of water flow is excessive in waterways.
Described activated carbon absorption box is of a size of 26.5cm * 80cm * 80cm or 26.5cm * 60cm * 60cm or 26.5cm * 40cm * 40cm.
Described purification casing is designed to 80cm * 80cm * 80cm or 80cm * 60cm * 60cm or 80cm * 40cm * 40cm.
Described plastic dam can adjust according to farmland drainage ditch flow rate of water flow, changes water-carrying section, to guarantee that the flow through hydraulic detention time in purifying box region of farmland drainage is greater than 6 minutes.
Upstream face plastic plate in described plastic plate, higher than other dough model flitch 10~15cm, makes the outside water surface of purifying box higher than the inner water surface in conjunction with water eliminator 15, for current enter purifying box, provides hydraulic pressure.

Claims (8)

1. the portable combined artificial wetland purifying box of farmland drainage ditch, it is characterized in that building single portable combined artificial wetland purifying box framework with reinforcing bar, plastic plate, wire netting, purifying box in this framework comprises miniature Manual moist area, biopurification ball district and charcoal absorption district, described miniature artificial swamp district is positioned at casing top, and this district comprises nitrogen, the obvious matrix of phosphorus adsorption effect and waterplant;
Described biopurification ball district, be positioned at box house, occupy box house 2/3rds volumes, this district is designed to upper and lower two parts, centre separates with plastic plate, so both increased the residence time of current, avoided again as increasing the infrastructure project that the farmland drainage residence time excavates shunt conduit or regulating sluice is set in irrigation canals and ditches; Upper and lower two parts are evenly overworked nitrogen, phosphorus are held back to the obvious biopurification ball of decontamination effect improving;
Described charcoal absorption district, be positioned at box house, occupy box house 1/3rd volumes, this district is designed to activated carbon absorption box, and activated carbon absorption box is by reinforcing bar, plastic silk screen, plastic plate and heavy metal, the obvious gac of pesticide residue objectionable impurities adsorption effect in farmland drainage are formed;
The lateral layout of described single portable combined artificial wetland purifying box is openable structure, to facilitate filler in periodic replacement case; Activated carbon absorption box is designed to openable equally, to be convenient for changing gac wherein; Intake-outlet place is equipped with wire netting, to prevent that larger suspended substance from entering in case, stops up;
During use, a plurality of portable combined artificial wetland purifying boxs are positioned in agriculture drainage ditch, farmland drainage is entered by purifying box water inlet, through bottom, biopurification ball district, charcoal absorption district, top, biopurification ball district, miniature Manual moist area, be purified processing successively, after the aging or charcoal absorption of microbial film on purifying box operation for some time biopurification ball is full, can easily purifying box be taken out biopurification ball, gac are processed respectively and renewal; During raining or farmland drainage overflow stage flow be to avoid stopping up that irrigation canals and ditches take out the purifying box in agriculture drainage ditch and the drainability that do not affect irrigation canals and ditches when large.
2. the portable combined artificial wetland purifying box of farmland drainage ditch according to claim 1, it is characterized in that described matrix design is in soil, to comprise the obvious slag of nitrogen phosphorus adsorption effect, matrix depth design is 15~20cm, and waterplant is selected Chinese celery economic plants.
3. the portable combined artificial wetland purifying box of farmland drainage ditch according to claim 1, it is characterized in that with plastic plate, separating between described upper and lower two parts in biopurification ball district, it is cross bar that biopurification ball suspension member be take φ 10 reinforcing bars, φ 4 reinforcing bars of take are pole, and biopurification ball is together in series by pole.
4. the portable combined artificial wetland purifying box of farmland drainage ditch according to claim 1, it is characterized in that described plastic silk screen and the Length Ratio of plastic plate are 1:2 or 2:1, when flow rate of water flow is excessive in waterways, increase the ratio of plastic silk screen, to increase discharge section area.
5. the portable combined artificial wetland purifying box of farmland drainage ditch according to claim 1, is characterized in that described activated carbon absorption box is of a size of 26.5cm * 80cm * 80cm or 26.5cm * 60cm * 60cm or 26.5cm * 40cm * 40cm.
6. the portable combined artificial wetland purifying box of farmland drainage ditch according to claim 1, is characterized in that described purification casing is designed to 80cm * 80cm * 80cm or 80cm * 60cm * 60cm or 80cm * 40cm * 40cm.
7. the portable combined artificial wetland purifying box of farmland drainage ditch according to claim 1, it is characterized in that described plastic dam can adjust according to farmland drainage ditch flow rate of water flow, change water-carrying section, to guarantee that the flow through hydraulic detention time in purifying box region of farmland drainage is greater than 6 minutes.
8. the portable combined artificial wetland purifying box of farmland drainage ditch according to claim 1, upstream face plastic plate in plastic plate described in it is characterized in that is higher than other dough model flitch 10~15cm, in conjunction with water eliminator, make the outside water surface of purifying box higher than the inner water surface, for current enter purifying box, provide hydraulic pressure.
CN201310283007.4A 2013-07-08 2013-07-08 Portable combined constructed wetland purifying box for farmland drainage ditch Active CN103288312B (en)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103833184B (en) * 2014-02-27 2015-05-13 河海大学 Paddy field recession water purification device placed in ridge of field
CN104003574B (en) * 2014-05-21 2015-07-15 河海大学常州校区 Labyrinth-type ecological purification pool suitable for drainage ditch in farmland
CN104817188A (en) * 2015-05-19 2015-08-05 天津市环境保护科学研究院 Design method based on three-pollution load for subsurface constructed wetland
CN105464203B (en) * 2016-01-15 2017-07-14 中国地质科学院水文地质环境地质研究所 Interactive wet deposition purifies system of regulating and storing
CN105948378A (en) * 2016-04-27 2016-09-21 常州大学 Farmland drainage ditch with built-in sewage purification system
CN107986384A (en) * 2018-01-10 2018-05-04 河海大学 A kind of roller shutter type farmland water-break pesticide clarifier based on photocatalytic degradation
CN110482639A (en) * 2019-08-14 2019-11-22 徐州工程学院 A kind of device suitable for administering terraced fields pollution of area source

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5893975A (en) * 1997-04-23 1999-04-13 Roux Associates, Inc. Enhanced subsurface flow constructed wetland
CN100497197C (en) * 2007-01-19 2009-06-10 天津市水利科学研究所 Multiple-component filler matrix undercurrent wet land purifying and processing apparatus and undercurrent wet land purifying method
CN101314511B (en) * 2008-04-30 2011-09-14 华南农业大学 Baffling type method and system for processing sanitary sewage of horizontal drowned flow artificial wet land
CN202880996U (en) * 2012-03-28 2013-04-17 王启明 Modularized dismountable constructed wetland

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