CN105236671A - Ecological green space sewage processing system and method thereof - Google Patents
Ecological green space sewage processing system and method thereof Download PDFInfo
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- CN105236671A CN105236671A CN201510638115.8A CN201510638115A CN105236671A CN 105236671 A CN105236671 A CN 105236671A CN 201510638115 A CN201510638115 A CN 201510638115A CN 105236671 A CN105236671 A CN 105236671A
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- 239000010865 sewage Substances 0.000 title claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 145
- 239000002245 particle Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000004576 sand Substances 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 54
- 244000005700 microbiome Species 0.000 claims description 47
- 239000000126 substance Substances 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 37
- 239000000945 filler Substances 0.000 claims description 36
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 36
- 229910052698 phosphorus Inorganic materials 0.000 claims description 36
- 239000011574 phosphorus Substances 0.000 claims description 36
- 229910052757 nitrogen Inorganic materials 0.000 claims description 27
- 241000196324 Embryophyta Species 0.000 claims description 26
- 241000353135 Psenopsis anomala Species 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 22
- 229910052902 vermiculite Inorganic materials 0.000 claims description 19
- 239000010455 vermiculite Substances 0.000 claims description 19
- 235000019354 vermiculite Nutrition 0.000 claims description 19
- 239000010457 zeolite Substances 0.000 claims description 15
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 claims description 11
- 235000013339 cereals Nutrition 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 11
- 239000004575 stone Substances 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 8
- 210000003165 Abomasum Anatomy 0.000 claims description 7
- 235000014676 Phragmites communis Nutrition 0.000 claims description 7
- 241000746966 Zizania Species 0.000 claims description 7
- 235000002636 Zizania aquatica Nutrition 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000003206 sterilizing agent Substances 0.000 claims description 6
- 230000003014 reinforcing Effects 0.000 claims description 5
- 230000002349 favourable Effects 0.000 claims description 4
- 239000002985 plastic film Substances 0.000 claims description 4
- 240000002290 Acorus calamus Species 0.000 claims description 3
- 235000011996 Calamus deerratus Nutrition 0.000 claims description 3
- 241000684239 Canna x generalis Species 0.000 claims description 3
- 240000000218 Cannabis sativa Species 0.000 claims description 3
- 210000000554 Iris Anatomy 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000011049 filling Methods 0.000 abstract description 5
- 244000052616 bacterial pathogens Species 0.000 abstract 6
- 238000003672 processing method Methods 0.000 abstract 2
- 230000001105 regulatory Effects 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- 230000000813 microbial Effects 0.000 description 12
- 238000004065 wastewater treatment Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 241000276438 Gadus morhua Species 0.000 description 4
- 238000005273 aeration Methods 0.000 description 4
- 235000019516 cod Nutrition 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 3
- -1 nitrogen phosphorus Chemical compound 0.000 description 3
- 230000000050 nutritive Effects 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 206010002660 Anoxia Diseases 0.000 description 2
- 241000976983 Anoxia Species 0.000 description 2
- 210000004055 Fourth Ventricle Anatomy 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000000845 anti-microbial Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000001360 synchronised Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N Furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001112 coagulant Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 230000000249 desinfective Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002708 enhancing Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N oxygen atom Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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- 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
The invention relates to an ecological green space sewage processing system. The system is characterized in that a regulating tank, an ecological green space tank, and a vertical sustain-released feed pipe are communicated with each other in sequence. The invention also provides a processing method of the ecological green space sewage processing system. The processing method comprises the following steps: (1) making sewage go through the regulating tank to intercept the suspensions and fine sand particles; (2) after step (1), introducing the sewage into a water distribution system, then introducing sewage into the ecological green space tank, making sewage go through a water distribution layer, a rooting layer, a microbe growing layer, an adsorption layer, a buffer layer, and a water collecting layer in the ecological green space tank from bottom to top, and finally introducing sewage into a water collecting device; (3) collecting water; (4) discharging clean water. Compared with the prior art, the provided system and method have the advantage that in the microbe growing layer, the biomembrane method and artificial wet land technology are organically combined, biological filling materials are increased, so that microbes can be enriched on the filling materials and grow on the filling materials, the microbe membrane is fixedly attached on the filling materials, the microbes are immobilized; the aerobic and anaerobic environments are alternately changed, and the effect of microbes is enhanced.
Description
Technical field
The present invention relates to a kind of sewage disposal technology, particularly relate to a kind of Eco-Green Space System that utilizes and sewage is carried out efficient denitrification, the treatment system of dephosphorization and method.
Background technology
Along with developing rapidly of China's economy, population increases, and the progressively raising of living standards of the people, the quickening of industrialization and urbanization paces, water consumption sharply increases, and quantity of wastewater effluent is corresponding increase also, exacerbates the shortage of Freshwater resources and the pollution of water surrounding.The aggravation of water environment pollution problem also causes body eutrophication problem also outstanding day by day, and the requirement therefore for the nitrogen in sewage effluent, phosphorus index is also improving constantly.In the GB18918-2002 " urban wastewater treatment firm pollutant emission standard " that China issues for 2002, one-level A standard-required TP is less than 0.5mg/l, and ammonia nitrogen is less than 5mg/l, and total nitrogen is less than 15mg/l.This just requires in sewage disposal technology, need you should pay special attention to the removal of the nutritive substance such as nitrogen, phosphorus.General Modern sewage treatment process is divided into one-level, secondary and three grades (advanced treatment), coagulation is generally physical treatment, the step generally comprised has grid, settling pit, second-stage treatment is generally biological treatment, as activated sludge process, biomembrance process, firsts and seconds process water conservancy project technology and equipment oneself through being difficult to reach requirement, the particularly emission standard of nitrogen phosphorus, but nitrogen phosphorus is again the principal pollutant of water pollution, reach the object of denitrogenation dephosphorizing, often after these techniques, still will add some sewage three grades of (degree of depth) treatment measures.The main method that three grades (degree of depth) processes has the stripping of ammonia, coagulant sedimentation, selective ion exchange deammoniation, sand filtration method, precipitator method dephosphorization active carbon adsorption, ion exchange method and electroosmose process etc., but these methods above-mentioned exist more, and treatment capacity is little or cost is high, treatment facility is numerous, the shortcoming that maintenance is complicated, some also can cause secondary pollution.
Artificial swamp is a kind of Novel sewage treatment process that 20 century 70s grow up, and he utilizes the triple synergy of the physics in natural system, chemistry and biology to realize dirty water purification.And traditional artificial swamp matrix is primarily of soil, the compositions such as sandstone, in sewage purification process, rely on the specific surface area that matrix is huge, one deck microbial film is formed on its surface, a small amount of microorganism can be adsorbed in biomembranous filtrate gap, thus microorganism is by the organism in self-acting removal sewage and nitrogen phosphorus, but the less therefore microbial process of the content of microorganisms in filtrate is limited, excessive free state microorganism easily causes filter clogging, thus reduce soluble solid in sewage and the organic absorption of the non-same sex, precipitation and the ability removed, therefore, high in order to seek to design a kind of microbial film content, matrix not easily blocks, the artificial swamp matrix of heat-insulating property and good permeability, one application number is that the Chinese patent application " a kind of high-efficient denitrification and dephosphorization constructed wetland device " of 201410375798.8 (publication No. is CN104118941A) provides and a kind of is applied in artificial wet land system by immobilized microorganism, it comprises artificial swamp pond, suction culvert, aerating apparatus and water unit, also comprise immobilized microorganism plate, totally 5 layers from top to bottom, described artificial swamp pond, be followed successively by: aerobic immobilized microorganism layer, gravel bed, Slag Layer, anaerobic immobilized microbial layer and furfural slag blanket, immobilized microorganism plate is provided with in described aerobic immobilized microorganism layer, immobilized sludge plate top is provided with the suction culvert be made up of water inlet pipe and water distribution branch pipe, water inlet pipe is through pool wall, water inlet pipe is provided with Liquid valve and liquid meter, the aerating apparatus be made up of aeration house steward and aeration branch pipe is installed on the downside of immobilized microorganism plate, aeration house steward, through pool wall, aeration house steward is provided with gas valve and gas meter, described anaerobic immobilized microbial layer is provided with immobilized microorganism assembly, and immobilized microorganism component internal is provided with immobilized microorganism plate, described water unit is made up of posticum, water leg and water leg water shoot, and install filter at posticum place, water unit is arranged on upper end, artificial swamp pond and water inlet pipe place pool wall opposes, described artificial swamp pond adopts steel and concrete structure to build, and pond body internal side wall and bottom surface arrange impervious barrier, immobilized microorganism, microorganism aerobic anaerobic treatment and artificial swamp organically combine by it, strengthen the effect of microorganism in artificial swamp, and effectively improve wastewater treatment efficiency, floor space is little, and cost of investment is low.But this artificial swamp after operation the phase can due to because of its water distribution uneven, cross passband to decline, in matrix, microorganism cannot normal growth, especially when wetland builds the initial stage or influent quality fluctuation is larger, in Wetland Substrate, microorganism cannot normal growth, after Wetland Substrate is saturated to organism, nitrogen, phosphorus absorption, wetland variation effect can obviously decline.
For this reason, in order to strengthen denitrogenation, the dephosphorization ability of artificial swamp, need to be improved further existing artificial swamp.
Summary of the invention
A technical problem to be solved by this invention provides a kind of ecological green land Sewage treatment systems effectively removing sewage nitrogen, phosphorus for above-mentioned prior art present situation.
Another technical problem to be solved by this invention provides a kind of above-mentioned ecological green land sewage water treatment method for above-mentioned prior art present situation.
The present invention solves the problems of the technologies described above adopted technical scheme: this ecological green land Sewage treatment systems, is characterized in that: comprise the equalizing tank be sequentially communicated with, ecological green land pond and three-dimensional slowly-releasing chemical feed pipe, wherein:
Described equalizing tank, includes sewage input aperture and sewage delivery port, and this equalizing tank is at least separated into one for filtering the chamber of suspended substance and fine sand grain, and the sewage delivery port of equalizing tank is provided with the submersible sewage pump to described ecological green land pond water distribution;
Described ecological green land pond, for removing organism, ammonia nitrogen and the phosphorus in sewage, include the water distribution system, wetland plant, Wetland Substrate and the captation that connect equalizing tank, wherein, described Wetland Substrate is respectively the layer that catchments from bottom to up, buffer layer, adsorption layer, microorganism growth layer, root layer, water distribution layer, this water distribution layer is evenly distributed with described water distribution system and plantation has described wetland plant, catchments in layer described in described captation is then arranged on;
Dosing containing slowly-releasing dephosphorization agent and sterilizing agent in described three-dimensional slowly-releasing chemical feed pipe is excellent, at sewage under equalizing tank, submersible sewage pump and water distribution system flow into the state in described ecological green land pond, after the micro-ecological environment process jointly can built by the wetland plant in ecological green land pond and Wetland Substrate, enter three-dimensional slowly-releasing chemical feed pipe finally by described captation outflow and process.
Further, thick bar grating is disposed with in described equalizing tank, slice grid and partition wall, wherein, the bottom of described partition wall has the through hole that can prevent suspended substance and fine sand grain from passing through, and be positioned at 2/3 place of equalizing tank, equalizing tank to be divided into the first chamber and the second chamber that volume ratio is 2:1, described thick bar grating and slice grid are all arranged in the first chamber, the interval of grid strip of described thick bar grating is 4 ~ 10mm and is positioned at 1/2 place of the first chamber, the interval of grid strip of described slice grid is 2 ~ 6mm and is positioned at 3/4 place of the first chamber, described submersible sewage pump is then arranged in the second chamber.Equalizing tank is by thick, that the first elimination particle of slice grid is larger suspended substance and fine sand grain, the suspended substance simultaneously filtered without both and fine sand grain can be stopped by the partition wall of three lines of defence, and the sewage tentatively filtered pumps in ecological green land pond by recycling submersible sewage pump.
Further, described in the layer that catchments adopt large pebbles and stone to be laid on described captation according to the ratio uniform of 1:2,1:1 or 2:1, laying is highly 50 ~ 200mm, and wherein, the particle diameter of pebbles and stone is respectively 5 ~ 25mm, 10 ~ 30mm;
It is highly 50 ~ 150mm that described buffer layer adopts melon seeds sheet and thin pebbles to be laid on laying on the layer that catchments according to the ratio uniform of 1:1,1:2 or 2:1, and wherein, the particle diameter of melon seeds sheet and thin pebbles is 3 ~ 20mm, 3 ~ 25mm respectively;
Described adsorption layer adopts can have the vermiculite of favourable absorption effect, the zeolite that can adsorb conversion ammonia nitrogen and total nitrogen efficiently or ceramic filter material to total phosphorus, vermiculite and zeolite or vermiculite and ceramic filter material are all laid on the buffer layer according to the ratio uniform of 1:1,1:2,2:1,3:1, laying is highly 200 ~ 300mm, wherein, vermiculite particle diameter is 3 ~ 10mm, and the particle diameter of ceramic filter material and zeolite is respectively 1 ~ 5mm and 1 ~ 5mm;
Described microorganism growth layer adopts 30 ~ 60 order engineering sands to lay and forms, laying is highly 300 ~ 500mm, inside arranges biological membrane assembly, described biological membrane assembly is made up of biofilm filler and filler support, wherein, the rectangular frame that described filler support adopts reinforcing bar to make, and in this framework every 0.2 ~ 0.8m
2a biofilm filler is laid in unit surface, and described biofilm filler includes 3 D elastic filler or combined stuffing, wherein, described 3 D elastic filler by ultimate strength be>=strand of 71dan and tensile strength>=15 and axial cord form jointly, and combined stuffing is the fibrous bundle of φ 150 ~ 200*100mm by specification, plastic sheet, sleeve pipe, axial cord form;
Described root layer adopts thin pebbles particle diameter to be 3 ~ 25mm with 40 order engineering sands to adopt the ratio of 49:51 to carry out mixing and be laid on microorganism growth layer, lays height 100 ~ 150mm;
Described water distribution layer; be not destroyed with protecting cloth water pipe for burying water distributor underground, employing pebbles and melon seeds sheet are proportionally that the ratio of 1:2,1:1 or 2:1 is laid, and the particle diameter of its cobble is 3 ~ 20mm; particle diameter 3 ~ the 25mm of melon seeds sheet, laying is highly 100 ~ 150mm.
Applicant carried out the correlation test of a large amount of filling kinds, particle diameter and grating, and tens engineering practices, this filler combination and grating mode are invented, wastewater treatment efficiency can be improved most effectively, reduce artificial swamp floor space, reduce substrate clogging, and facilitate follow-up maintenance and operational management, in the design and implementation process of concrete engineering, then according to designing the different requirements of Inlet and outlet water water quality, the thickness proportion of adjustment packing layer.Best specific embodiment is:
The described layer that catchments adopts large pebbles and stone to be laid on described captation according to the ratio uniform of 1:2, and laying is highly 50mm, and wherein, the particle diameter of pebbles and stone is respectively 5mm, 10mm;
It is highly 100mm that described buffer layer adopts melon seeds sheet and thin pebbles to be laid on laying on the layer that catchments according to the ratio uniform of 1:1, and wherein, the particle diameter of melon seeds sheet and thin pebbles is 10mm, 10mm respectively;
Described adsorption layer employing can have the vermiculite of favourable absorption effect, the vermiculite that can adsorb conversion ammonia nitrogen and total nitrogen efficiently and zeolite to total phosphorus and lay on the buffer layer according to the ratio uniform of 1:2, laying is highly 200mm, wherein, vermiculite particle diameter is 10mm, and the particle diameter of zeolite is 5mm;
Described microorganism growth layer adopts 30 order engineering sands to lay and forms, and laying is highly 200mm, and inside arranges biological membrane assembly, described biological membrane assembly is made up of biofilm filler and filler support, wherein, the rectangular frame that described filler support adopts reinforcing bar to make, and in this framework every 0.5m
2a biofilm filler is laid in unit surface, and described biofilm filler includes 3 D elastic filler or combined stuffing, wherein, described 3 D elastic filler by ultimate strength be>=strand of 71dan and tensile strength>=15 and axial cord form jointly, and combined stuffing is the fibrous bundle of φ 150 ~ 200*100mm by specification, plastic sheet, sleeve pipe, axial cord form;
Described root layer adopts thin pebbles particle diameter to be 5mm with 40 order engineering sands to adopt the ratio of 49:51 to carry out mixing and be laid on microorganism growth layer, lays height 100mm;
Described water distribution layer, is not destroyed with protecting cloth water pipe for burying water distributor underground, and employing pebbles and melon seeds sheet are proportionally that the ratio of 1:2 is laid, and the particle diameter of its cobble is 3mm, and the particle diameter of melon seeds sheet is 3mm, and laying is highly 100mm.
Further, described water distribution system supervisor adopts pvc pipe, caliber is 25 ~ 80mm, also shallow embedding is uniformly distributed in water distribution layer by the distance of 200 ~ 1000mm, every root supervisor arranges a cloth water distributor at a distance of 200 ~ 800mm, described cloth water distributor adopts turning spurt water device, exposed in water distribution layer 30 ~ 50mm, evenly sprinkle water to surrounding.Adopt this water distribution system the sewage through preliminary treatment can be evenly dispersed in more the surface in ecological green land pond, and the sewage carrying out next step deeply process.
Further, described wetland plant can be Canna generalis Bailey, reed, calamus, parasol grass, iris, a kind of and several wetland plant plantation such as Medulla Junci and wild rice stem form, and plantation standoff distance is 150 ~ 300mm.It is special in reed and wild rice stem are alternately planted, reed pump oxygen function is stronger, wild rice stem sorption enhanced nitrogen, phosphorus effect is excellent, effectively can improve the oxygen concn of aerobic area, promote the efficient growth releasing phosphorus bacterium, and two plant growth cycles are shorter, nitrogen can be removed in time, the nutritive elements such as phosphorus, the situation preventing nutritive element surplus occurs, wild rice stem simultaneously, reed is as cash crop, also has certain economic use value, land acquisition can be compensated to a certain extent, the financial loss that electrical expenses brings, the sustainable strategic development meeting country's proposition requires and Rural Recycling Economy Development target.
Further, described three-dimensional slowly-releasing chemicals dosing plant is outside equipped with water port, and the slowly-releasing dephosphorization agent in the dosing rod arranged in it and sterilizing agent are according to the mixing of 1:9 ~ 9:1 ratio, and dosage is 1 ~ 3ppm.
The present invention also provides a kind for the treatment of process of ecological green land Sewage treatment systems, it is characterized in that: step is as follows:
(1) sewage is through the intercept process of described equalizing tank, can tackle suspended substance large in sewage and fine sand grain:
(2) sewage after step (1) intercept process enters through described water distribution system and enters described ecological green land pond, sewage from upper and successively by the water distribution layer that arranges in ecological green land pond, root layer, microorganism growth layer, adsorption layer, buffer layer and the layer that catchments and enter captation:
(3) catchment, the clear water of ecological green land pond bottom flows into described three-dimensional slowly-releasing chemical feed pipe through described captation;
(4) export clear water, discharged by described three-dimensional slowly-releasing chemical feed pipe.
Compared with prior art, the invention has the advantages that and sewage disposal is divided into elementary physical treatment, the biological treatment of secondary and three grades are disinfected, successively by thick in primary treatment, fine fack and partition wall process, with elimination suspended substance and fine sand grain, the microbial film process of secondary mainly sewage by by being respectively the layer that catchments from bottom to up, buffer layer, adsorption layer, microorganism growth layer, root layer, after water distribution layer process, reach the object of denitrogenation dephosphorizing, key is also biomembrance process and Artificial Wetland Techniques to be organically combined in microorganism growth layer, increase biologic packing material, promote that microorganism anchors at enrichment and growth on filler with membranaceous, microorganism is in immobilized state, microorganism also has aerobic and anaerobism alternate environment, increase microbial process effect, therefore artificial swamp is not easily caused to block, improve the wastewater treatment efficiency of artificial swamp entirety.Form multi-level coenosis, major objective is for expediting the emergence of denitrification flora and releasing phosphorus flora, because this region is in the fibrous root grown layer of plant, for natural double oxygen layer, denitrification flora and release the allometry of phosphorus flora and enliven under this anoxia condition, is conducive to denitrification and releases phosphorus and carry out, reach the effect of synchronous high-efficiency dephosphorization and denitrogenation, simultaneously also utilize can adsorption of nitrogen, phosphorus material construct adsorption layer, for effectively controlling water outlet total nitrogen, total phosphorus; Finally, arrange in ecological green land water side and emergent add slow release type dephosphorization agent and sanitizer device severity control effluent quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structural representation of filler support in biological membrane assembly in the embodiment of the present invention 1.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one
As shown in Figure 1, this ecological green land Sewage treatment systems comprises the equalizing tank 1 be sequentially communicated with, ecological green land pond 2 and three-dimensional slowly-releasing chemical feed pipe 3, wherein:
1) equalizing tank 1, include sewage input aperture 4 and sewage delivery port 41, equalizing tank 1 is successively by least by thick bar grating 5, slice grid 6 and partition wall 7 are separated into four Room (level Four), with pipeline communication between room and room: wherein, the bottom of partition wall 7 has the through hole 26 that can prevent suspended substance and fine sand grain from passing through, and be positioned at 2/3 place of equalizing tank 1, equalizing tank 1 to be divided into the first chamber and the second chamber that volume ratio is 2:1, thick bar grating 5 and slice grid 6 are all arranged in the first chamber, the interval of grid strip of thick bar grating 5 is 4mm and is positioned at 1/2 place of the first chamber, the interval of grid strip of slice grid 6 is 26mm and is positioned at 3/4 place of the first chamber, submersible sewage pump 25 is then arranged in the second chamber and fourth ventricle,
Object: the suspended substance that can reduce last room like this flows into next room;
The fourth ventricle of equalizing tank 1 is called as sewage lifting pump chamber, the sewage delivery port 41 of equalizing tank 1 is mounted with a table flotation ball submersible sewage pump 25, remove after taking-up dregs through thick strip grid and stria grid, after water level reaches work liquid level, can adopt according to practical situation and carry out water distribution in two ways: after one, reaching work liquid level, submersible sewage pump 25 always water distribution until water level is lower than ball float work liquid level; Two, after ball float reaches work liquid level, adopt water inlet 15min, stop the water intake mode of 5min, until water level is lower than work liquid level, such sewage is promoted to ecological green land pond 2 by ball float submersible sewage pump 25.
2) shape in ecological green land pond 2 can be determined according to site operation situation, can just, can toroidal indefinite, bottom and surrounding adopt brick mix structure 19 to lay after rammed earth, laid inside impermeable layer 18, water header 22 is laid in bottom, and is uniformly distributed the side pipe 24 that catchments;
Lay six layers of Wetland Substrate in the body of pond, be respectively the layer 11 that catchments from bottom to up, buffer layer 12, adsorption layer 13, microorganism growth layer 14, root layer 15, water distribution layer 16, wherein in water distribution layer 16, water distribution system 8 is responsible for and is adopted pvc pipe, caliber is 25mm, also shallow embedding is uniformly distributed in water distribution layer 16 by the distance of 200mm, water distributor input terminus connects through water distribution supervisor the equalizing tank 1 sewage delivery port 41 being mounted with ball float submersible pump, every root supervisor arranges a cloth water distributor 10 at a distance of 200mm, cloth water distributor 10 adopts turning spurt water device, exposed in water distribution layer 16 30mm, evenly sprinkle water to surrounding, adopt this water distribution system 8 sewage through preliminary treatment can be evenly dispersed in more the surface in ecological green land pond 2, be easy to infiltrate multilayer Wetland Substrate,
Water gathering system, having water header 22 adopts PE to manage, caliber is 25mm, the side pipe 24 that catchments is connected by reducing tee with water header 22, and be often evenly distributed on water header 22 at a distance of 400-1000mm, the side pipe 24 that catchments adopts PE material, caliber is 15mm, catchment side pipe 24 liang of side hole, aperture is 2mm, and pitch-row is that 200mm is uniformly distributed.
Object; Sewage is after the multi task process of the Wetland Substrate of six layers, and through catchmenting, side pipe 24 enters water header 22, then flows out ecological green land pond 2 and enters three-dimensional slowly-releasing chemical feed pipe 3 and process.
3) wetland plant 9
Mainly contain: Canna generalis Bailey, reed, calamus, parasol grass, iris, Medulla Junci and wild rice stem etc.Various plants can mixed planting, can burst plantation, and plantation standoff distance is 150mm.In the present embodiment one, wetland plant 9 uses reed and the plantation of wild rice stem interval.
4) the medium size composition building form of every layer of Wetland Substrate in embodiment one:
| Wetland Substrate | Dielectric material |
| Water distribution layer 16 | 3mm pebbles: 3mm melon seeds sheet=1:2, laying is highly 100mm |
| Root layer 15 | The thin pebbles of 5mm: 40 order engineering sand=49:51, laying is highly 100mm |
| Microorganism growth layer 14 | 30 order engineering sands, laying is highly 300mm |
| Adsorption layer 13 | 10mm vermiculite: 5mm zeolite=1:2, laying is highly 200mm |
| Buffer layer 12 | Thin pebbles=the 1:1 of 10mm melon seeds sheet: 10mm, laying is highly 100mm |
| Catchment layer 11 | 5mm pebbles: 10mm stone=1:2, laying is highly 50mm |
Wherein, six layers of Wetland Substrate from top to bottom, change from small to big by media particle size, and water distribution layer 16 is for burying water distributor underground, and protecting cloth water pipe is not destroyed and the sewage that effectively distributes.
Root layer 15, adopt thin pebbles mix with sand can ensure to ensure while sewage crosses passband wetland plant 9 good root, for its growth provides good environment.
Microbial layer, because filler has abundant specific surface area and good bioaffinity, utilize simultaneously there is some strength filler support as shown in Figure 2, the rectangular frame that this filler support adopts reinforcing bar to make, and in this framework every 0.2m
2a biofilm filler is laid in unit surface, microorganism is in immobilized state, placement direction is identical with water (flow) direction, for adsorbing microorganism and organic pollutant, microorganism anchors at enrichment and growth on filler with membranaceous, form multi-level coenosis, main cultivation target is denitrification flora and releases phosphorus flora, this region is in the fibrous root grown layer of plant especially, for natural double oxygen layer, denitrification flora and release the allometry of phosphorus flora and enliven under this anoxia condition, is conducive to denitrification and releases phosphorus and carry out, reach the effect of synchronous high-efficiency dephosphorization and denitrogenation.
Adsorption layer 13, be equivalent to the storage or saving layer of total phosphorus and total nitrogen in sewage, treat that its growth inadequate of the nutrition of the microorganism of microbial layer taken, because vermiculite has good adsorption to total phosphorus, can effectively be adsorbed as by wetland plant 9 and antimicrobial absorbent, the organophosphorus of conversion, phosphoric acid salt, zeolite and ceramic filter material can adsorb conversion ammonia nitrogen and total nitrogen efficiently, transform, in order to avoid the microbial death of microbial layer for antimicrobial absorbent.If front end process total nitrogen, total phosphorus are for being effectively controlled further, unnecessary total nitrogen, total phosphorus will be adsorbed again at adsorption layer 13, slowly release total nitrogen, total phosphorus carries out above process in the situation that influent concentration is lower.
Therefore, this system lays six layers of Wetland Substrate, Artificial Wetland Techniques and technology of biological membrane is used to combine at microorganism growth layer 14, by reasonably laying Wetland Substrate, building microbial film and setting up, improve denitrifying bacteria and the biofilm environment releasing phosphorus bacterium, even if in the situation that system has just been brought into use or flooding quantity fluctuation is larger, microorganism also can efficient biofilm, and the microorganism of normal growth enhances and acts synergistically with wetland plant 9, is conducive to removing total nitrogen, the total phosphorus in sewage.Adopt vermiculite, zeolite or ceramic filter material etc. to lay adsorption layer 13 in Wetland Substrate, the material such as nitrogen, phosphorus is adsorbed further, severity control nitrogen, phosphorus aqueous concentration, realize the effect of efficient denitrification, dephosphorization.After the chemicals dosing plant adding a kind of slowly-releasing dephosphorization agent and sterilizing agent proportioning at end especially, dephosphorization is again carried out to water outlet and realizes disinfection.Above technical guarantee effluent quality reaches " urban wastewater treatment firm pollutant emission standard " GB19819-2002 one-level B and above standard.
Its experimental result following (this result is the experimental result not increasing the water distribution of three-dimensional slowly-releasing chemical feed pipe 3 device hydromining septic tank at end):
| Monitoring site | Sampling time | Suspended substance | COD cr | BOD 5 | Ammonia nitrogen | Total phosphorus | Total nitrogen |
| Water inlet | First week | 110 | 118.3 | 72.3 | 27.0 | 3.88 | 38.7 |
| Water outlet | First week | 12 | 42.1 | 13.5 | 0.105 | 0.97 | 13.9 |
| Water inlet | Second week | 130 | 178.4 | 110.7 | 22.3 | 3.14 | 27.8 |
| Water outlet | Second week | 11 | 35.7 | 10.1 | 0.242 | 0.73 | 14.0 |
| Water inlet | 3rd week | 122 | 158.0 | 80.5 | 16.0 | 2.04 | 17.7 |
| Water outlet | 3rd week | 9 | ＜30 | 8.9 | 0.288 | 0.42 | 14.5 |
| Water inlet | 4th week | 135 | 164.6 | 98.0 | 26.2 | 2.88 | 26.5 |
| Water outlet | 4th week | 7 | ＜30 | 9.5 | 0.600 | 0.37 | 14.1 |
When not installing three-dimensional slowly-releasing chemicals dosing plant 3, can find out through the experiment of month, even if when intaking existence fluctuation, sewage disposal all can reach the standard of " urban wastewater treatment firm pollutant emission standard " GB19819-2002 one-level B, can reach the requirement of one-level A third and fourth week, the control of system to total nitrogen and total phosphorus is better especially.A kind of efficient denitrification is described, the multifunctional ecological greenery patches system of dephosphorization has actual using value.
5) sewage water treatment method (process) of the embodiment of the present invention:
(1) sewage is through the intercept process of equalizing tank 1, can tackle suspended substance large in sewage and fine sand grain:
(2) sewage after step (1) intercept process enters through described water distribution system 8 and enters ecological green land pond 2, sewage from upper and successively by the water distribution layer 16 that arranges in ecological green land pond 2, root layer 15, microorganism growth layer 14, adsorption layer 13, buffer layer 12 and the layer 11 that catchments enters captation:
(3) catchment, the clear water of ecological green land pond 2 bottom flows into three-dimensional slowly-releasing chemical feed pipe 3 through captation;
(4) export clear water, discharged by three-dimensional slowly-releasing chemical feed pipe 3.
Embodiment two
This invention relates to a kind of efficient denitrification, the multifunctional ecological greenery patches system of dephosphorization, it may be used for villages and small towns, rural area, small community, central business district, landscape water body, high-speed service district, oil drilling living quarters, the sanitary sewage disposal in the regions such as living quarters is explored in field for a long time, not by the restriction in place, working-yard, this Eco-Green Space System can according to the shape random variation in place, can with surrounding landscape with the use of, when this Eco-Green Space System special is used for the sewage disposal in region (as landscape water body), leading portion equalizing tank 1 and end three-dimensional slowly-releasing chemical feed pipe 3 device all can be removed according to the actual requirements, be with the difference of embodiment one: the medium size composition building form of every layer of Wetland Substrate in embodiment two:
| Wetland Substrate | Dielectric material |
| Water distribution layer 16 | 3mm pebbles: 3mm melon seeds sheet=1:2, laying is highly 150mm |
| Root layer 15 | The thin pebbles of 3mm: 40 order engineering sand=49:51, laying is highly 150mm |
| Microorganism growth layer 14 | 40 order engineering sands, laying is highly 500mm |
| Adsorption layer 13 | 10mm vermiculite: 5mm zeolite=1:2, laying is highly 300mm |
| Buffer layer 12 | Thin pebbles=the 1:1 of 20mm melon seeds sheet: 20mm, laying is highly 150mm |
| Catchment layer 11 | 25mm pebbles: 30mm stone=1:1, laying is highly 200mm |
Table one wastewater influent water quality
| Sequence number | Project | Parameter | Remarks |
| 1 | pH | 6～9 |
| Sequence number | Project | Parameter | Remarks |
| 1 | pH | 6～9 | |
| 2 | SS(mg/L) | ≤200 | |
| 3 | COD(mg/L) | ≤400 | |
| 4 | BOD 5(mg/L) | ≥200 | |
| 5 | NH 3-N(mg/L) | ≤50 | |
| 6 | TP | ≤5 |
Experimental result after the structure of ecological green land Sewage treatment systems and the process of sewage following (this result is the experimental result increasing three-dimensional slowly-releasing chemical feed pipe 3 device water at end):
| Monitoring site | Sampling time | Suspended substance | COD cr | BOD 5 | Ammonia nitrogen | Total phosphorus | Total nitrogen |
| Water inlet | First week | 125 | 200.3 | 100.5 | 30.0 | 4.88 | 50.7 |
| Water outlet | First week | 12 | 42.1 | 13.5 | 0.3 | 3.28 | 15.9 |
| Water inlet | Second week | 121 | 150.3 | 110.7 | 22.3 | 3.14 | 27.8 |
| Water outlet | Second week | 11 | 35.7 | 10.1 | 0.242 | 0.73 | 12.0 |
| Water inlet | 3rd week | 144 | 158.0 | 80.5 | 16.0 | 2.04 | 11.7 |
| Water outlet | 3rd week | 9 | ＜30 | 8.9 | 0.388 | 0.42 | 24.5 |
| Water inlet | 4th week | 20 | 120.6 | 98.0 | 22.2 | 2.88 | 10.5 |
| Water outlet | 4th week | 8 | ＜27 | 8.5 | 0.500 | 0.29 | 13.2 |
Similarly, when not installing three-dimensional slowly-releasing chemicals dosing plant, can find out through the experiment of month, even if when intaking existence fluctuation, sewage disposal all can reach the standard of " urban wastewater treatment firm pollutant emission standard " GB19819-2002 one-level B, can reach the requirement of one-level A third and fourth week, the control of system to total nitrogen and total phosphorus is better especially.A kind of efficient denitrification is described, the multifunctional ecological greenery patches system of dephosphorization has actual using value.
Embodiment three
Be that leading portion equalizing tank 1 and end three-dimensional slowly-releasing chemical feed pipe 3 device all have setting with the difference of embodiment two, and the medium size composition building form of every layer of Wetland Substrate is:
| Wetland Substrate | Dielectric material |
| Water distribution layer 16 | 4mm pebbles: 4mm melon seeds sheet=2:1, laying is highly 120mm |
| Root layer 15 | The thin pebbles of 5mm: 40 order engineering sand=49:51, laying is highly 100mm |
| Microorganism growth layer 14 | 40 order engineering sands, laying is highly 400mm |
| Adsorption layer 13 | 5mm vermiculite: 5mm zeolite=1:2, laying is highly 250mm |
| Buffer layer 12 | Thin pebbles=the 2:1 of 15mm melon seeds sheet: 25mm, laying is highly 150mm |
| Catchment layer 11 | 20mm pebbles: 30mm stone=1:1, laying is highly 150mm |
Experimental result after the structure of ecological green land Sewage treatment systems and the process of sewage is following, and (this result increases three-dimensional slowly-releasing chemical feed pipe 3 device at end, slowly-releasing dephosphorization agent in the dosing rod 21 arranged in it and sterilizing agent are according to the mixing of 1:9 ratio, and dosage is the experimental result of 3ppm):
| Monitoring site | Sampling time | Suspended substance | COD cr | BOD 5 | Ammonia nitrogen | Total phosphorus | Total nitrogen |
| Water inlet | First week | 120 | 300.3 | 200.5 | 40.0 | 4.88 | 50.7 |
| Water outlet | First week | 10 | 32.2 | 13.5 | 10 | 2.38 | 25.6 |
| Water inlet | Second week | 131 | 150.3 | 110.7 | 22.3 | 3.14 | 27.8 |
| Water outlet | Second week | 10 | 35.7 | 10.1 | 0.242 | 0.73 | 12.0 |
| Water inlet | 3rd week | 124 | 158.0 | 80.5 | 16.0 | 2.04 | 11.7 |
| Water outlet | 3rd week | 8 | ＜25 | 9.8 | 0.25 | 0.32 | 21.5 |
| Water inlet | 4th week | 20 | 120.6 | 98.0 | 22.2 | 2.88 | 10.5 |
| Water outlet | 4th week | 9 | ＜33 | 6.5 | 0.300 | 0.45 | 15.2 |
Similarly, when installing three-dimensional slowly-releasing chemicals dosing plant, can find out through the experiment of month, even if when intaking existence fluctuation, sewage disposal all can reach the standard of " urban wastewater treatment firm pollutant emission standard " GB19819-2002 one-level B, can reach the requirement of one-level A third and fourth week, the control of system to total nitrogen and total phosphorus is better especially.A kind of efficient denitrification is described, the multifunctional ecological greenery patches system of dephosphorization has actual using value.
Claims (8)
1. an ecological green land Sewage treatment systems, is characterized in that: comprise the equalizing tank (1) be sequentially communicated with, ecological green land pond (2) and three-dimensional slowly-releasing chemical feed pipe (3), wherein:
Described equalizing tank (1), include sewage input aperture (4) and sewage delivery port (41), this equalizing tank (1) is at least separated into one for filtering the chamber of suspended substance and fine sand grain, and the sewage delivery port (41) of equalizing tank (1) is provided with the submersible sewage pump (25) to described ecological green land pond (2) water distribution;
Described ecological green land pond (2), for removing the organism in sewage, ammonia nitrogen and phosphorus, include the water distribution system (8) connecting equalizing tank (1), wetland plant (9), Wetland Substrate and captation, wherein, described Wetland Substrate is respectively the layer that catchments (11) from bottom to up, buffer layer (12), adsorption layer (13), microorganism growth layer (14), root layer (15), water distribution layer (16), this water distribution layer (16) is evenly distributed with described water distribution system (8) and plants and have described wetland plant (9), catchment in layer (11) described in described captation is then arranged on,
The dosing rod (21) of slowly-releasing dephosphorization agent and sterilizing agent is contained in described three-dimensional slowly-releasing chemical feed pipe (3), at sewage under equalizing tank (1), submersible sewage pump (25) and water distribution system (8) flow into the state in described ecological green land pond (2), after the micro-ecological environment process jointly can built by the wetland plant (9) in ecological green land pond (2) and Wetland Substrate, enter three-dimensional slowly-releasing chemical feed pipe (3) finally by described captation outflow and process.
2. ecological green land Sewage treatment systems according to claim 1, it is characterized in that: in described equalizing tank (1), be disposed with thick bar grating (5), slice grid (6) and partition wall (7), wherein, the bottom of described partition wall (7) has the through hole (26) that can prevent suspended substance and fine sand grain from passing through, and be positioned at 2/3 place of equalizing tank (1), equalizing tank (1) to be divided into the first chamber and the second chamber that volume ratio is 2:1, described thick bar grating (5) and slice grid (6) are all arranged in the first chamber, the interval of grid strip of described thick bar grating (5) is 4 ~ 10mm and is positioned at 1/2 place of the first chamber, the interval of grid strip of described slice grid (6) is 2 ~ 6mm and is positioned at 3/4 place of the first chamber, described submersible sewage pump (25) is then arranged in the second chamber.
3. ecological green land Sewage treatment systems according to claim 1, it is characterized in that: described in the layer (11) that catchments adopt large pebbles and stone to be laid on described captation according to the ratio uniform of 1:2,1:1 or 2:1, laying is highly 50 ~ 200mm, wherein, the particle diameter of pebbles and stone is respectively 5 ~ 25mm, 10 ~ 30mm;
It is highly 50 ~ 150mm that described buffer layer (12) adopts melon seeds sheet and thin pebbles to be laid on laying on the layer that catchments (11) according to the ratio uniform of 1:1,1:2 or 2:1, wherein, the particle diameter of melon seeds sheet and thin pebbles is 3 ~ 20mm, 3 ~ 25mm respectively;
Described adsorption layer (13) adopts can have the vermiculite of favourable absorption effect, the zeolite that can adsorb conversion ammonia nitrogen and total nitrogen efficiently or ceramic filter material to total phosphorus, vermiculite and zeolite or vermiculite and ceramic filter material are all laid on buffer layer (12) according to the ratio uniform of 1:1,1:2,2:1,3:1, laying is highly 200 ~ 300mm, wherein, vermiculite particle diameter is 3 ~ 10mm, and the particle diameter of ceramic filter material and zeolite is respectively 1 ~ 5mm and 1 ~ 5mm;
Described microorganism growth layer (14) adopts 30 ~ 60 order engineering sands to lay and forms, laying is highly 300 ~ 500mm, inside arranges biological membrane assembly (17), described biological membrane assembly (17) is made up of biofilm filler and filler support, wherein, the rectangular frame that described filler support adopts reinforcing bar to make, and in this framework every 0.2 ~ 0.8m
2a biofilm filler is laid in unit surface, and described biofilm filler includes 3 D elastic filler or combined stuffing, wherein, described 3 D elastic filler by ultimate strength be>=strand of 71dan and tensile strength>=15 and axial cord form jointly, and combined stuffing is the fibrous bundle of φ 150 ~ 200*100mm by specification, plastic sheet, sleeve pipe, axial cord form;
Described root layer (15) adopts thin pebbles particle diameter to be 3 ~ 25mm with 40 order engineering sands to adopt the ratio of 49:51 to carry out mixing and be laid on microorganism growth layer (14), lays height 100 ~ 150mm;
Described water distribution layer (16); be not destroyed with protecting cloth water pipe for burying water distributor underground; employing pebbles and melon seeds sheet are proportionally that the ratio of 1:2,1:1 or 2:1 is laid; the particle diameter of its cobble is 3 ~ 20mm; particle diameter 3 ~ the 25mm of melon seeds sheet, laying is highly 100 ~ 150mm.
4. ecological green land Sewage treatment systems according to claim 3, it is characterized in that: described in the layer (11) that catchments adopt large pebbles and stone to be laid on described captation according to the ratio uniform of 1:2, laying is highly 50mm, wherein, the particle diameter of pebbles and stone is respectively 5mm, 10mm;
It is highly 100mm that described buffer layer (12) adopts melon seeds sheet and thin pebbles to be laid on laying on the layer that catchments (11) according to the ratio uniform of 1:1, and wherein, the particle diameter of melon seeds sheet and thin pebbles is 10mm, 10mm respectively;
Described adsorption layer (13) employing can have the vermiculite of favourable absorption effect, the vermiculite that can adsorb conversion ammonia nitrogen and total nitrogen efficiently and zeolite to total phosphorus and be laid on buffer layer (12) according to the ratio uniform of 1:2, laying is highly 200mm, wherein, vermiculite particle diameter is 10mm, and the particle diameter of zeolite is 5mm;
Described microorganism growth layer (14) adopts 30 order engineering sands to lay and forms, laying is highly 200mm, inside arranges biological membrane assembly (17), described biological membrane assembly (17) is made up of biofilm filler and filler support, wherein, the rectangular frame that described filler support adopts reinforcing bar to make, and in this framework every 0.5m
2a biofilm filler is laid in unit surface, and described biofilm filler includes 3 D elastic filler or combined stuffing, wherein, described 3 D elastic filler by ultimate strength be>=strand of 71dan and tensile strength>=15 and axial cord form jointly, and combined stuffing is the fibrous bundle of φ 150 ~ 200*100mm by specification, plastic sheet, sleeve pipe, axial cord form;
Described root layer (15) adopts thin pebbles particle diameter to be 5mm with 40 order engineering sands to adopt the ratio of 49:51 to carry out mixing and be laid on microorganism growth layer (14), lays height 100mm;
Described water distribution layer (16), is not destroyed with protecting cloth water pipe for burying water distributor underground, and employing pebbles and melon seeds sheet are proportionally that the ratio of 1:2 is laid, and the particle diameter of its cobble is 3mm, and the particle diameter of melon seeds sheet is 3mm, and laying is highly 100mm.
5. ecological green land Sewage treatment systems according to claim 1, it is characterized in that: described water distribution system (8) supervisor adopts pvc pipe, caliber is 25 ~ 80mm, also shallow embedding is uniformly distributed in water distribution layer (16) by the distance of 200 ~ 1000mm, every root supervisor arranges a cloth water distributor (10) at a distance of 200 ~ 800mm, described cloth water distributor (10) adopts turning spurt water device, exposed at water distribution layer (16) upper 30 ~ 50mm, evenly sprinkle water to surrounding.
6. ecological green land Sewage treatment systems according to claim 1, it is characterized in that: described wetland plant (9) can be Canna generalis Bailey, reed, calamus, parasol grass, iris, Medulla Junci and wild rice stem etc. are a kind of and several wetland plant (9) plantation forms, and plantation standoff distance is 150 ~ 300mm.
7. ecological green land Sewage treatment systems according to claim 1, it is characterized in that: described three-dimensional slowly-releasing chemicals dosing plant is outside equipped with water port (22), slowly-releasing dephosphorization agent in the dosing rod (21) arranged in it and sterilizing agent are according to the mixing of 1:9 ~ 9:1 ratio, and dosage is 1 ~ 3ppm.
8. a treatment process for the ecological green land Sewage treatment systems according to claim 1 ~ 7 any one claim, is characterized in that: step is as follows:
(1) sewage is through the intercept process of described equalizing tank (1), can tackle suspended substance large in sewage and fine sand grain:
(2) sewage after step (1) intercept process enters through described water distribution system (8) and enters described ecological green land pond (2), sewage from upper and successively by the water distribution layer (16) of setting in ecological green land pond (2), root layer (15), microorganism growth layer (14), adsorption layer (13), buffer layer (12) and the layer that catchments (11) and enter captation:
(3) catchment, the clear water of ecological green land pond (2) bottom flows into described three-dimensional slowly-releasing chemical feed pipe (3) through described captation;
(4) export clear water, discharged by described three-dimensional slowly-releasing chemical feed pipe (3).
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