CN101781060A - Composite artificial wetland sewage treatment system - Google Patents
Composite artificial wetland sewage treatment system Download PDFInfo
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- CN101781060A CN101781060A CN201010115495A CN201010115495A CN101781060A CN 101781060 A CN101781060 A CN 101781060A CN 201010115495 A CN201010115495 A CN 201010115495A CN 201010115495 A CN201010115495 A CN 201010115495A CN 101781060 A CN101781060 A CN 101781060A
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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
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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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a sewage treatment system of a composite constructed wetland, which comprises: the pretreatment tank is communicated with the vertical flow artificial wetland tank, the lower part of the vertical flow artificial wetland tank is provided with a horizontal undercurrent artificial wetland tank, the horizontal undercurrent artificial wetland tank is arranged below the ground surface, and the vertical flow artificial wetland tank is communicated with the horizontal undercurrent artificial wetland tank through a reflux tank; the vertical-flow artificial wetland pool is internally provided with a coarse sand layer, an artificial mixing layer and a gravel layer in sequence from top to bottom, gravel areas are arranged at two sides of the horizontal subsurface-flow artificial wetland pool, a medium area is arranged in the middle of the horizontal subsurface-flow artificial wetland pool, the coarse sand layer, the artificial mixing layer and the coarse sand layer are arranged in sequence from top to bottom in the medium area, the vertical-flow artificial wetland pool is planted with plants with shallow root systems, and the horizontal subsurface-flow artificial wetland pool is planted with plants with deep root systems; the upper part of the vertical flow artificial wetland pool is provided with a water distribution pipe, the lower part of the vertical flow artificial wetland pool is provided with a drainage groove, and the lower part of the horizontal undercurrent artificial wetland pool is also provided with a drainage groove. The invention has high sewage treatment efficiency, good effluent quality and small occupied area.
Description
Technical field
The present invention relates to sewage treatment area, especially a kind of composite artificial wetland sewage treatment method.
Background technology
Along with Chinese society rapid development of economy and quickening of urbanization process, cities and towns water imbalance between supply and demand becomes increasingly conspicuous on the one hand, a large amount of dischargings of flood tide wastewater and sewage make that again resource of water supply is constantly polluted on the other hand, and then water quality environment is constantly worsened.In more than 600 city of China, the water shortage problem of more than 400 city various degrees is arranged at present, annual water deficit reaches 6,000,000,000 tons, annual nearly 300,000,000,000 yuan of the financial loss that causes owing to lack of water.Meanwhile, the annual quantity of wastewater effluent in China city reaches 41,400,000,000 tons at present, after the sewage of these flood tides enters surface water body, the limited surface water body of China is caused serious day by day harm, the pollution problem of the equal various degrees in section in the seven big water system basins, the whole nation more than 50%, the large quantities of provinces and cities in ground such as Jiangsu, Shanghai, Guangzhou have faced serious water pollution type water shortage problem, keep 2300 square kilometres TAIHU LAKE as Taihu Lake basin 3,000 ten thousand people, the difficult situation of " water how difficult with " but occurring.No matter be the Sustainable development that source material type lack of water or water pollution type lack of water had all had a strong impact on and restricted Chinese society economy.How to address this problem a crucial research topic that has become in the Chinese society Economic development, in the Tenth Five-Year Plan (2001-2005) outline, the sewage recycling strategy design that proposes is undoubtedly one of means effectively, sewage recycling not only can reduce quantity of wastewater effluent significantly, improve the surface water body ecotope, reduce drainage system investment and working cost, and can increase considerably available water, reduce and use for water treatment and fees for water supplied, the financial loss that reduction causes because of lack of water, improve the people's existence health environment, promote industry, the development of tourism and water industry.Yet China's sewage recycling implementation is but had difficulty in taking a step always, and China's sewage purification and reuse rate is still very low at present.Though it is many-sided causing the reason of this situation, major cause still is the sewage purification and reuse technology, can't adapt to the requirement of the sewage resource marketization.Though the past, traditional bio-aeration pool technology can be removed the organism in the sewage effectively, lower to the removal ability of nitrogen phosphorus, effluent quality can not reach middle water reuse standard; Though the membrane Bio-reactor Technology effluent quality is higher, the investment working cost is higher, has limited this broad application, and other chemical physics treatment technologies also all exist investment working cost height, effluent quality instability and secondary pollution problems.
The constructed wetland waste water treatment technology that is now moving has high-level efficiency, low investment, low running expense, the low characteristics of keeping technology, receives concern more and more widely in worldwide.But also exist simultaneously: can not directly dispose of sewage, bad adaptability can only be carried out advanced treatment at the sewage after elementary or the second-stage treatment; Low for the heavy metal contaminants assimilated efficiency; Technology is influenced by ambient temperature big; Easily multiply shortcomings such as mosquito summer.Existing constructed wetland waste water treatment technology can be divided into surperficial streaming, vertical streaming and undercurrent type substantially.The surface current artificial wetland is primary artificial swamp, and similar with natural wetland, the depth of water is more shallow, and generally about 0.2-0.4 rice, waste water is from wetland surface current mistake.Such artificial swamp floor space is big, and hydraulic loading rate is little, and soil removability is limited, and the oxygen transmittability is limited, is subjected to weather effect very big, easily multiplies mosquitos and flies summer.Also there is the phenomenon of multiplying mosquitos and flies summer the wet artificially of vertical current for organic removal scarce capacity.Underflow type artificial wet land oxygen supply deficiency, nitrification is bad.People had proposed composite artificial wetland sewage treatment method in recent years, advantage that can comprehensive all types of artificial swamps, but exist also that floor space is big, wastewater treatment efficiency is undesirable, can't well utilize shortcomings such as the absorption of wetland matrix and filtration, therefore in order to make China's sewage recycling strategy implementation that significant progress be arranged, the novel ecological sewage purification and reuse technology of R and D has crucial meaning.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of sewage treating efficiency height, unit surface wastewater purification efficiency height, composite artificial marsh sewage treatment system that effluent quality is good.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of composite artificial marsh sewage treatment system, comprise: pretreatment pool, pretreatment pool is communicated with the vertical current constructed wetland pond, bottom, vertical current constructed wetland pond is provided with the horizontal drowned flow artificial wet land pond, the horizontal drowned flow artificial wet land pond is located under the ground surface, and the vertical current constructed wetland pond is communicated with the horizontal drowned flow artificial wet land pond via backflow pool; The matrix of inside, described vertical current constructed wetland pond is followed successively by coarse sands layer, artificial mixolimnion and gravel bed from top to bottom, both sides, described horizontal drowned flow artificial wet land pond are provided with the gravel district, the centre is the matrix district, the matrix district in horizontal drowned flow artificial wet land pond is followed successively by coarse sands layer, artificial mixolimnion, coarse sands layer from top to bottom, the vertical current constructed wetland pond is carried and is implanted with the shallow root system plant, the horizontal drowned flow artificial wet land pond dark root system plant of having planted; Top, vertical current constructed wetland pond is provided with water distributor, and the bottom is provided with dredging flow groove, and bottom, horizontal drowned flow artificial wet land pond also is provided with dredging flow groove.
Further improvement also is provided with the water collecting basin that is used for the sewage secondary treatment, is provided with sump pump in the water collecting basin, and sump pump is communicated in the water distributor on top, vertical current constructed wetland pond, and the sluicing groove in horizontal drowned flow artificial wet land pond is by the pipeline connection water collecting basin.
Further improvement also is provided with the tail water water purification agent feeding system that is used for treated sewage is carried out the ecological rehabilitation processing, and tail water water purification agent feeding system connects water collecting basin by pipeline.
Further improvement also is provided with the insulation power system, the insulation power system comprises solar energy greenhouse and is positioned the solar panel of solar energy greenhouse outer wall, the agent structure of solar energy greenhouse is a steel construction, and the outer wall of solar energy greenhouse is formed enclosed space by transparent glass.
Preferably, be provided with sump pump in the above-mentioned backflow pool, sump pump goes out the gravel district by the entry in pipeline connection horizontal drowned flow artificial wet land pond, backflow pool is by the dredging flow groove in pipeline connection vertical current constructed wetland pond, be provided with the underwater jet aeration machine in the backflow pool, the underwater jet aeration machine is communicated in the micropore aeration pipe at the bottom of the pond, horizontal drowned flow artificial wet land pond.
Preferably, above-mentioned pretreatment pool is provided with water-in and water outlet, is provided with the impurity that is used for sewage in the pretreatment pool and carries out preliminary filtering grid, and a side of grid is made of grizzly bar and transverse ribs, and opposite side is provided with screen cloth.
Preferably, the artificial composite bed in above-mentioned vertical current constructed wetland pond and horizontal drowned flow artificial wet land pond is mixed by vermiculite, zeolite, cinder and forms, and it highly is at least 20cm.
Preferably, the dredging flow groove bottom in above-mentioned vertical current constructed wetland pond and horizontal drowned flow artificial wet land pond is equipped with waterproof layer, be provided with above the waterproof layer of dredging flow groove bottom, vertical current constructed wetland pond and can hold the hole, prefabricated cave that dark root system enriching plant cane passes through, the plastic water tight packing of the inboard filling flexible in hole, prefabricated cave, the dredging flow groove top in vertical current constructed wetland pond is provided with porous disc, horizontal drowned flow artificial wet land is provided with diaphragm in the pond, and diaphragm forms the water stream channel of S type.
Adopt the beneficial effect that technique scheme produced to be: 1, the advantage of the comprehensive various artificial swamp processing modes of the present invention, not only can efficiently remove the inorganic eutrophication element in the sewage, can also effectively divide desorption to organism in the sewage and heavy metal contaminants, the unit surface wastewater purification efficiency is increased substantially, thereby allow purification back effluent quality reach the advanced treatment standard, and, can save floor occupying area owing to adopted the vertical composite structure of last following formula.
2, the present invention has fully utilized all kinds of forms of artificial swamp, makes that sewage is multi-direction repeatedly flow to be purified, the clarification time abundance, the holding back of better utilised matrix, filter, effect such as absorption, also overcome the susceptible to plugging problem of vertical current simultaneously easily.
3, can solve the little problem of horizontal drowned flow layer oxygen compensation rate by the aerating apparatus that is provided with.
4, further improving the solar energy system that is provided with can make the present invention not be subjected to the influence of seasonal temperature, not only can when the spring and summer temperature is higher, move, and can normally move when temperature is low in autumn and winter, solved the problem that north of china in winter artificial swamp processing efficiency reduces; And utilize the solar energy heating power supply, sewage is handled, can significantly reduce cost, improve sewage treating efficiency simultaneously.
5, further improve the tail water water purification agent feeding system that passes through setting, can enter and not cause ecological burden in the natural stream networks carrying out the ecological rehabilitation processing through the middle water of handling and do not recycle.
6, the present invention compares with traditional artificial swamp treatment technology, and floor space can be saved more than 50%, and the unit surface processing efficiency can improve more than 60%, stable effluent quality; The present invention adopts the natural style technological method that sewage is carried out purifying treatment, non-secondary pollution fully.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the synoptic diagram in horizontal drowned flow wetland pond;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the synoptic diagram in vertical-flow wetland pond;
Fig. 5 is the synoptic diagram of water distributor;
Fig. 6 is the synoptic diagram of micropore aeration pipe;
Fig. 7 is the synoptic diagram in vertical-flow wetland pond;
Fig. 8 is the synoptic diagram of grid;
Fig. 9 is the vertical view of Fig. 8;
Wherein, 1, terrace face; 2, pretreatment pool; 3, grid; 4, solar panel; 5, shallow root system plant; 6, water distributor; 7, the coarse sands layer in vertical current constructed wetland pond; 8, the artificial mixolimnion in vertical current constructed wetland pond; 9, gravel bed; 10, the dredging flow groove in vertical-flow wetland pond; 11, the tail water water purification agent pond that feeds intake; 12, water collecting basin; 13, the sump pump in the water collecting basin; 14, the sump pump in the backflow pool; 15, sump pump; 16, underwater jet aeration machine; 17, backflow pool; 19, the coarse sands layer in horizontal drowned flow artificial wet land pond; 20, dredging flow groove; 21, the artificial mixolimnion in horizontal drowned flow artificial wet land pond; 22, coarse sands layer; 23, diaphragm; 24, sump pump; 25, greenhouse printing opacity outer wall; 26, grizzly bar; 27, transverse ribs; 28, screen cloth; 29, vertical current constructed wetland pond; 30, horizontal drowned flow artificial wet land pond; 31, water distribution is responsible for; 32, water distribution branch pipe; 33, entry place gravel district; 34, water outlet place gravel district; 35, micropore aeration pipe; 36, the waterproof layer of dredging flow groove bottom; 37, the waterproof layer at dredging flow groove top; 38, the waterproof layer in vertical current constructed wetland pond; 39, the porous disc in vertical current constructed wetland pond; 40, preset the hole, cave; 41, flexible plastic water tight packing.
Embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Referring to accompanying drawing 1, pending sewage flows into pretreatment pool 2 earlier, pretreatment pool 2 is settled grid 3, so that filter the floating matter and the suspended substance of bulk, reduce the scum silica frost that subsequent disposal produces, the normal operation of assurance sewage disposal device can also take to throw in water purification agent or the gravitational settling method is further carried out pre-treatment to it.Flow into vertical current constructed wetland pond 29 by sump pump 24 through water distributor 6 through pretreated sewage, by valve controlling flow speed.Water distributor 6 is located at the vertical current constructed wetland pool surface, is made up of the water distribution person in charge 31 and water distribution branch pipe 32, is " king " word structure, can make water distribution even.Vertical current constructed wetland pond 29 matrix are made up of coarse sands layer 7, artificial mixolimnion 8 and gravel bed 9 from top to bottom, artificial mixolimnion 8 is mixed by zeolite, vermiculite, cinder and forms, and joins when inserting in the wetland pond, according to top closely knit following loose, top particle is tiny, below the thick principle of particle.Wherein preferable particle size is vermiculite 0.2～1.5cm, zeolite 1.4～2.5cm, and cinder 3～7cm, coarse sands layer particle diameter 2～7mm, the bottom gravel diameter is 4～8cm.Sewage vertically permeates a part of heavy metal contaminants of absorption by matrix layer by layer, the nitrated ability emphasis that grows in root system of plant in the matrix and microorganism species is removed nitrogen Ammonia inorganics, sharply reduce through suspended particulate content in the sewage after 29 processing of vertical current constructed wetland pond, but each organic pollutant in the sewage and heavy metal contaminants do not have a large amount of reductions.
Sewage is by behind the vertical current constructed wetland pond 29, flow into backflow pool 17 by the sluicing groove at the bottom of the pond 10, backflow pool 17 is gone into horizontal drowned flow artificial wet land pond 30 by sump pump 14 with effluent stream afterwards for the sewage junction after handling through vertical current constructed wetland pond 29, goes into speed with valve controlling flow.The horizontal drowned flow artificial wet land pond is provided with under the terrace face, helps Winter protection like this, improves the north of china in winter working efficiency.The multiple enriching plant of main configuration in the horizontal drowned flow pond, as reed, Stenocalyx micheli, calamus, Scirpus tabernaemontani or the like, the integrated configuration super enriching plant, realize the removal purpose of heavy metal contaminants in the sewage for the powerful absorptive function of heavy metal contaminants by all kinds of enriching plants, simultaneously in the horizontal drowned flow artificial wet land pond, can form plant---the micropopulation ecosystem, in matrix and root system, a large amount of superior microorganism groups be can occur, microorganism species further decomposing organic pollutant and heavy metal contaminants relied on.Be laid with matrix and micropore aeration pipe 35 in the horizontal drowned flow artificial wet land pond 30, carry out little aeration by micropore aeration pipe 33 to the oxygen supply of horizontal drowned flow artificial wet land pond by underwater jet aeration machine 16.The plant translocation that mainly relies on common horizontal drowned flow wetland realizes vertical oxygen compensation, compensation rate is little, and vertical-flow wetland pond itself can increase the vertical infiltration capacity of oxygen among the present invention, utilize backflow pool 17 and little aerating apparatus can more effectively increase system's oxygen level again, improve the reaction purification efficiency of root system of plant and microorganism species, the efficient processing absorbs heavy metal contaminants, decomposing organic pollutant.Behind the sewage process horizontal drowned flow artificial wet land pond 30, organic pollutant and heavy metal contaminants can reduce in a large number, inorganic pollutant also can further reduce, water after treatment can flow into water collecting basin 12, water collecting basin 12 can be monitored wastewater treatment efficiency, and is provided with sump pump 13 and pipeline, can make sewage backflow carry out secondary treatment, middle water after the processing can recycle, and can also utilize tail water water purification agent feeding system that middle water in the water collecting basin is carried out discharging after the ecological recovery processing.Tail water water purification agent feeding system, the ecological, environmental protective composite water treatment agent that employing is mixed and is made by pure natural improved grindings such as diatomite, sepiolite, lotus leaf, reed, zeolites, has the deposit fouling thing, the characteristics of reduction water body naturality composition, to carrying out the ecological rehabilitation processing through the middle water of handling and do not recycle, enter and do not cause ecological burden in the natural stream networks, can be referring to the patent of publication number CN101003401A " a kind of ecological, environmental protective composite water treatment agent ".
Referring to accompanying drawing 1, total system of the present invention is in the solar energy greenhouse 25, and solar panel 4 is hung on solar energy greenhouse 25 outsides.When envrionment temperature was low, solar energy greenhouse 25 can be caught solar thermal energy, improved room temp, to guarantee waterplant normal growth at all seasons, bred environment for the microorganism cenobium provides good existence; All right on the other hand conversion solar energy, for underwater jet aeration machine 16 provides operation power, save energy.So can solve the problem of logical constructed wetland waste water treatment technology inefficiency under the north of china in winter cold conditions.
Referring to accompanying drawing 2, accompanying drawing 3, the both sides in horizontal drowned flow artificial wet land pond 30 are the gravel district, wherein a side is entry place gravel district 33, opposite side is water outlet place gravel district 34, entry place gravel diameter is 8～15mm, water outlet place gravel diameter is 2～4cm, the zone that is surrounded by water guide dividing plate 23 is not filled up in water outlet place gravel district 34, but added the part gravel, the part gravel is added in water outlet place can effectively prevent the system obstruction, be convenient to water and better discharge, 34 bottoms, water outlet place gravel district are provided with porous disc, and all the other positions that water outlet place gravel district 34 parts are removed at the dredging flow groove top are provided with waterproof layer 37.Matrix is made up of coarse sands layer 22, artificial mixolimnion 21, coarse sands layer 19 from top to bottom, artificial mixolimnion 21 is mixed by zeolite, vermiculite, cinder and forms, and joins when inserting in the wetland pond, according to top closely knit following loose, top particle is tiny, below the thick principle of particle.Wherein preferable particle size is vermiculite 0.2～1.5cm, zeolite 1.4～2.5cm, cinder 3～7cm, coarse sands layer particle diameter 2～7mm.The diaphragm 23 that is provided with makes current form the passage of similar S shape, can increase sewage treatment effect.
Referring to accompanying drawing 4, the shallow root system plant 5 of having planted in the vertical-flow wetland pond 29, this plant has inrichment, the vertical-flow wetland pond is because of on the face of land, so the plant of selecting for use is based on shallow root system or floating plant, the inorganic pollutant processing power is strong, has landscape effect simultaneously concurrently, as Medulla Junci, water lily, Spiked Loosestrife, floral leaf Canna generalis Bailey etc.Sewage evenly flows into vertical current constructed wetland pond 29 through water distributor 6, and the porous disc 39 that passes through sluicing groove 10 upper walls in vertical current constructed wetland pond 29 at last imports the sluicing grooves, flows into backflow pool 17 through water discharge pipe.The waterproof layer 38 and the porous disc 39 in vertical current constructed wetland pond are square polynuclear plane, are reserved with the hole, cave above so that the cane of the dark root system plant in horizontal drowned flow wetland pond is passed through.Waterproof layer 38 flows directly into horizontal drowned flow wetland pond for the water that prevents from handling, simultaneously in order to guarantee that plant grows normally, can between hole, cave and plant haulm, lay flexible plastic water tight packing such as plastic cement etc., not only prevent the circulation of sewage string pond, also can guarantee plant normal growth as far as possible, not influence efficient.What porous disc 38 directly contacted is the gravel of big particle diameter, and suspended substance is few and the piece of matrix direct contact own is big, is difficult for stopping up, and does not need special processing.
Referring to accompanying drawing 5, water distributor 6 is provided with the water distribution person in charge 31 and water distribution branch pipe 32 for being similar to the water distributor of " king " font.Referring to accompanying drawing 6, micropore aeration pipe is preferably the porous PVC aeration tube, and its shape also is similar to " king " font.
Referring to accompanying drawing 7, the waterproof layer in vertical current constructed wetland pond is rubber or plastics material through special processing.Presetting hole 40 passes through dark root system plant haulm.
Referring to accompanying drawing 8, accompanying drawing 9, grid is made up of grizzly bar 26, transverse ribs 27, framework, screen cloth 28, and grizzly bar can stop the suspended substance that filters bulk in advance, and as branch, food bag etc., the screen cloth by the grid back further filters then.
After this Sewage treatment systems is built up, approximately need time about 20-27 days allow centre portions bio-reaction system " preheating ", make root system of plant and superior microorganism flora breed one can stabilizing treatment digestion sewage stage.
In original reason test of the present invention, once respectively at river course, Baoding sanitary sewage, certain papermaking sewage and certain Electroplate Factory's trade effluent experimentize, the acquisition experimental data is as follows: COD is a chemical oxygen demand (COD) among the following embodiment, BOD is a biochemical oxygen demand (BOD), and SS is a suspended substance, the TP total phosphorus.
Table 1
River course sanitary sewage (mg/L of unit)
| ??COD | ??BOD | ??SS | Nitrogen ammonia | ??TP | Sulfide | |
| Water inlet | ??157 | ??125 | ??73.7 | ??27.8 | ??3.9 | ??2.7 |
| After tail water feeds intake | ??19 | ??7.8 | ??3.3 | ??6.1 | ??0.21 | ??0.18 |
| Purify ratio | ??87.90％ | ??93.76％ | ??98.93％ | ??78.06％ | ??94.62％ | ??93.33％ |
Table 2
Papermaking sewage (mg/L of unit)
| ??COD | ??SS | Sulfide | Colourity | Volatile phenol | |
| Water inlet | ??4800 | ??1077 | ??15.1 | ??96 | ??1.7 |
| ??COD | ??SS | Sulfide | Colourity | Volatile phenol | |
| After tail water feeds intake | ??58 | ??27.7 | ??0.4 | ??12 | ??0.16 |
| Purify ratio | ??98.79％ | ??97.43％ | ??97.35％ | ??87.5％ | ??90.59％ |
Because the pollutant level that contains in the sewage is too high, in the water collecting basin sampling observation first time, residual quantity is very high, has opened after the processing capacity that refluxes once more, repeats twice processing, makes tail water reach national sewage second-level emission standard in papermaking sewage processing experiment.The mg/L of unit does not comprise the unit of colourity in the table 2.
Table 3
Electroplate Factory's trade effluent (mg/L of unit)
| ??COD | ??Cr | ??Zn | ??Fe | ??Mn | ??SS | ??pH | |
| Water inlet | ??151 | ??23.78 | ??14.86 | ??43.16 | ??24.22 | ??145 | ??3.53 |
| After tail water feeds intake | ??2 | ??0.9 | ??0.6 | ??0.7 | ??0.5 | ??8 | ??6.9 |
| Purify ratio | ??98.68％ | ??96.21％ | ??95.95％ | ??98.37％ | ??97.94％ | ??94.48％ | ??- |
In Electroplate Factory's sewage disposal experiment, heavy metal contaminants level contained in the sewage is higher, in the water collecting basin sampling observation first time, though the processing rate of each heavy metal contaminants has reached about 70%, but content does not reach national sewage second-level emission standard yet, opened after the processing capacity that refluxes once more, repeated twice processing, made tail water reach national sewage second-level emission standard.The mg/L of unit does not comprise the unit of pH in the table 3.
To the above-mentioned explanation of disclosed embodiment, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (8)
1. composite artificial marsh sewage treatment system, it is characterized in that: comprising: pretreatment pool (1), pretreatment pool (1) is communicated with vertical current constructed wetland pond (29), bottom, vertical current constructed wetland pond (29) is provided with horizontal drowned flow artificial wet land pond (30), horizontal drowned flow artificial wet land pond (30) is located under the ground surface, and vertical current constructed wetland pond (29) are communicated with horizontal drowned flow artificial wet land pond (30) via backflow pool (17); The inner matrix in described vertical current constructed wetland pond (29) is followed successively by coarse sands layer (7), artificial mixolimnion (8) and gravel bed (9) from top to bottom, both sides, described horizontal drowned flow artificial wet land pond (30) are provided with the gravel district, the centre is the matrix district, the matrix district is followed successively by coarse sands layer (22), artificial mixolimnion (21), coarse sands layer (19) from top to bottom, vertical current constructed wetland pond (29) is carried and to be implanted with the shallow root system plant, horizontal drowned flow artificial wet land pond (30) the dark root system plant of having planted; Top, vertical current constructed wetland pond (29) is provided with water distributor (6), and the bottom is provided with dredging flow groove (10), and bottom, horizontal drowned flow artificial wet land pond is provided with dredging flow groove (20).
2. composite artificial marsh sewage treatment system according to claim 1, it is characterized in that: also be provided with the water collecting basin (12) that is used for the sewage secondary treatment, be provided with sump pump (13) in the water collecting basin (12), sump pump (13) is communicated in the water distributor (3) on top, vertical current constructed wetland pond (29), and the sluicing groove (20) of horizontal drowned flow artificial wet land pond (30) is by pipeline connection water collecting basin (12).
3. compound thermal technology's marsh sewage treatment system according to claim 2, it is characterized in that: also be provided with the tail water water purification agent feeding system (11) that is used for treated sewage is carried out the ecological rehabilitation processing, tail water water purification agent feeding system connects water collecting basin (12) by pipeline.
4. according to claim 1 or 2 or 3 described composite artificial marsh sewage treatment systems, it is characterized in that: also be provided with the insulation power system, the insulation power system comprises solar energy greenhouse (25) and is positioned the solar panel (4) of solar energy greenhouse outer wall, the agent structure of solar energy greenhouse (25) is a steel construction, and the outer wall of solar energy greenhouse is formed enclosed space by transparent glass.
5. composite artificial marsh sewage treatment system according to claim 1, it is characterized in that: be provided with sump pump (14) in the described backflow pool (17), sump pump (14) is by the entry place gravel district (33) in pipeline connection horizontal drowned flow artificial wet land pond (30), backflow pool (17) is by the dredging flow groove (10) in pipeline connection vertical current constructed wetland pond (29), (17) are provided with underwater jet aeration machine (16) in the backflow pool, and underwater jet aeration machine (16) is communicated in the micropore aeration pipe (35) at the bottom of the pond, horizontal drowned flow artificial wet land pond (30).
6. composite artificial marsh sewage treatment system according to claim 1, it is characterized in that: described pretreatment pool (1) is provided with water-in and water outlet, be provided with the impurity that is used for sewage in the pretreatment pool (1) and carry out preliminary filtering grid (2), one side of grid (2) is made of grizzly bar (26) and transverse ribs (27), and opposite side is provided with screen cloth (28).
7. composite artificial marsh sewage treatment system according to claim 1 is characterized in that: described artificial composite bed (8,21) is mixed by vermiculite, zeolite, cinder and forms, and it highly is at least 20cm.
8. composite artificial marsh sewage treatment system according to claim 1, it is characterized in that: described vertical current constructed wetland pond (29) is equipped with waterproof layer with the dredging flow groove bottom in horizontal drowned flow artificial wet land pond (30), be provided with above the waterproof layer (38) of dredging flow groove bottom, vertical current constructed wetland pond and can hold the hole, prefabricated cave (40) that dark root system plant stem passes through, inboard, hole, prefabricated cave (40) is filled with flexible plastic water tight packing (41), and dredging flow groove (10) top is provided with porous disc (39); Be provided with diaphragm (23) in the horizontal drowned flow artificial wet land pond (30), diaphragm (23) forms the water stream channel of S type.
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