CN101538086B - Power-free integrated constructed wetland waste water treatment technology - Google Patents

Power-free integrated constructed wetland waste water treatment technology Download PDF

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CN101538086B
CN101538086B CN2009100963997A CN200910096399A CN101538086B CN 101538086 B CN101538086 B CN 101538086B CN 2009100963997 A CN2009100963997 A CN 2009100963997A CN 200910096399 A CN200910096399 A CN 200910096399A CN 101538086 B CN101538086 B CN 101538086B
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water
zone
sewage
denitrification
nitrated
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CN2009100963997A
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Chinese (zh)
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CN101538086A (en
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冯元群
沈加思
康颖
蒋江
吴斌
邵卫伟
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浙江省环境监测中心
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/22Improving land use; Improving water use or availability; Controlling erosion
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention discloses a power-free integrated constructed wetland waste water treatment technology. The technology is characterized in that a vertical-flow waste water ecological purifying tank is divided into an upper region and a lower region; a waste water pre-treatment system is one or more pre-treatment processes of a grid, a three-grid type settling tank and an anaerobic tank, living waste water after the pre-treatment enters a water distribution system by being lifted by a water pump or relying on the natural liquid level height difference; the waste water after the pre-treatment is evenly distributed on a nitrification region of the vertical subsurface flow ecological purifying tank through a cross water distribution pipe network and is sequentially vertically penetrated in the nitrification region and an artificial matrix layer of a denitrification region; the water distribution system implements intermittent water distribution for the ecological purifying tank and is provided with a power-free gas distribution system at the bottom and in the upper nitrification region for realizing the continuous oxygen restoration of the nitrification region; outlet water of the upper nitrification region directly enters the lower denitrification region; a water collecting and water outlet system is arranged in the lower denitrification region, a water collecting port is arranged below the denitrification region, and a water outlet is arranged above the denitrification region, thereby leading the outlet water to maintain a certain water level in the denitrification region. The technology can realize the power-free natural oxygen restoration of the wetland, occupy small area and realize the nitrification-denitrification integrated high-efficient nitrogen removal.

Description

A kind of power-free integrated constructed wetland waste water treatment technology
Technical field
The present invention relates to environmental protection technical field, relate in particular to the sewage disposal ecological engineering technology.
Background technology
Constructed wetland waste water treatment technology is a kind of sewage disposal ecological engineering new technology of rising the seventies in 20th century, have advantages such as less investment, energy consumption are low, convenient management, non-secondary pollution, be applied to vast rural area and middle small town sewage process field gradually.
Artificial swamp be artificial build, the wet land system of controllable and through engineering approaches, generally being made up of pond body, hand-stuff matrix, water distribution system, water gathering system and the plant that is grown on the artificial substratum, is the matrix-plant-microorganism ecosystem of a uniqueness.The ultimate principle of artificial swamp ecosystem purification of water quality is: the specific plant of plantation on certain filler, sewage is added on the wetland that is similar to the marsh of artificial construction, when effluent stream is crossed artificial swamp, filter through sandstone, soil, the multiple microbial activities of plant rhizosphere makes water quality be purified.Prove that according to experiment and a large amount of engineering practices the artificial ecology filter bed can be removed BOD, TSS, N, P well, and also very effective to the removal effect of pathogenetic bacteria, biodegradable organic compounds and metal ion.Artificial swamp is mainly reflected in the following aspects to environment and economic comprehensive action: remedy or reduce the influence that natural wetland is caused because of agricultural and urban development; Make up aquatic system, produce food and fiber; Regulate and store rainfall runoff and flood control; Carry out sewage disposal, improve water quality.
The undercurrent type vertical current constructed wetland is a type of artificial swamp, and principal feature is: water distribution system is tiled in the top substrate, sewage is distributed on the matrix horizontal section after, sewage evenly flows downward, and sewage is purified; Lay water gathering system in the wetland bottom substrates, the water outlet that is distributed on horizontal section after the collection and treatment is discharged after the pooling.The undercurrent type vertical current constructed wetland has made full use of the wetland space, has given full play to the synergy between system, can remove most of organic matter after the sewage disposal and carry out fully nitrification, becomes the main flow direction of artificial swamp technical development gradually.But traditional undercurrent type vertical current constructed wetland is bad to the denitrification effect of sewage, can not reach the purpose of high-efficient denitrification and dephosphorization because abundant reoxygenation in the treating processes, to sewage carry out aerobic to take off organic effect also not satisfactory.In view of above-mentioned defective, the researchist has invented a large amount of technological improvement undercurrent type vertical current constructed wetlands, to increase the processing efficiency of pollutent.As Chinese patent CN 1263688C " sanitary sewage vertical current-horizontal flow combined artificial wetland denitrification and dephosphorization method ", disclosed a kind of vertical current constructed wetland preceding, horizontal flow artificial wetland after the tandem compound artificial wetland treatment process.Is the denitrification effect that carbon source increases horizontal flow artificial wetland the horizontal-flow wetland forefathers for replenishing untreated sewage.But vertical-flow wetland is reoxygenation fully, has influenced the treatment effect of nitrification and aerobic oxidation, and two wetlands series connection floor space is big, cost is high, poor practicability.Chinese patent CN 1325397C " technique of undercurrent artificial wetland in sequence batch mode for treating sewage ", disclosed a kind of utilize the mechanical automation mode control magnetic valve to the water outlet of wetland intermittent drainage with the implementation phase reoxygenation.It has increased the reoxygenation effect of vertical subsurface flow formula artificial swamp to a certain extent, but it needs the additionaling power Controlling System, has increased investment, and the denitrification denitrogenation for sewage does not have significant promoter action in addition.
Summary of the invention
The present invention aims to provide and a kind ofly can realize the unpowered natural reaeration of wetland, and floor space is little, the power-free integrated constructed wetland waste water treatment technology of nitration denitrification integrated high-efficiency denitrogenation.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of power-free integrated constructed wetland waste water treatment technology, comprise by matrix, pretreatment system for sewage, water distribution system, water gathering system, gas distribution system, drainage in nitrated zone and denitrification zone vertical current sewage ecological purification groove dimerous, the filling slot and be grown in plant on the matrix, it is characterized in that:
Described vertical current sewage ecological purification groove is divided into two subregions up and down: nitrated zone and denitrification zone, nitrated zone are last, and the denitrification zone is following, and described artificial substratum is filled in respectively in nitrated zone and the denitrification zone;
Described pretreatment system for sewage is to utilize one or more pre-treating technologies in grid, three form settling tanks, the anaerobic pond that the sewage of different pollution loads is carried out pre-treatment, through the sanitary sewage of pre-treatment through water pump lifting or rely on the nature liquid level discrepancy in elevation to enter water distribution system; Pretreated sewage is uniformly distributed on the nitrated zone of vertical subsurface flow formula ecological purification groove by intersection water distribution pipe network, the vertical successively artificial substratum layer that infiltrates nitrated zone and denitrification zone; Water distribution system is carried out intermittently water distribution to the ecological purification groove, and bottom the nitrated zone and inside is provided with unpowered gas distribution system on the upper strata, and continuous reoxygenation is realized in nitrated zone, makes sewage carry out aerobic efficiently effect and nitrification in nitrated zone, upper strata; The nitrated regional water outlet in upper strata directly enters lower floor denitrification zone, hold concurrently in this zone oxygen effect and denitrification; Lower floor is provided with the outlet system that catchments in the denitrification zone, and inlet is located at below, denitrification zone, and water outlet is located at top, denitrification zone, makes water outlet keep certain water level in the denitrification zone.
In vertical current sewage ecological purification groove, sewage by with the effect of matrix, microorganism and root system of plant, realize physical cleaning, biological purification, reach the purpose of SS, the BOD, COD, bacterium and the high-efficient denitrification and dephosphorization that reduce sewage.
As preferably, described water distribution system is the water distribution pipe network that is arranged on 5-10cm under the nitrated regional matrix of the upper strata sewage top layer, this water distribution pipe network includes inlet valve, water-in, water distribution is responsible for is responsible for the cloth water branch that is connected with a plurality of with this water distribution, water distribution is responsible for the cloth water branch and is distribution of vertical " king " word or the distribution of intersection " king " word, has the water distribution aperture on the cloth water branch.
As preferably, described water gathering system is the pipe network that catchments that is arranged on lower floor denitrification zone, the person in charge that catchments, water outlet and flowing water Valve that this pipe network that catchments includes inlet, vertically catchments branch, level set water branch, is connected with the level set water branch with the vertical branch that catchments; Catchment and be responsible for and the level set water branch is vertical " king " word and distributes or intersect " king " word and distribute, vertically catchment branch and level set water branch and catchment and be the spatial vertical distribution between the person in charge, intermediate duct communicates; Inlet is located at the branches end of vertically catchmenting, and forms for several that have on the circular pipeline cross section aperture that catchments, and the distance of body bottom, the whole pond of inlet distance is not more than 1/3 of denitrification zone total height; The level set water branch, catchment and be responsible for and inlet is positioned at same level height, their level attitude is that lower floor denitrification cell body top is between 2/3 height of distance denitrification cell body top.
As preferably, described gas distribution system is to be distributed in the gas distribution pipe network that one or more groups pipe shaft of upper strata is full of aperture; Every group of gas distribution pipe network is by horizontal gas distribution pipe, form with vertical several the vertical gas distribution branches that link to each other of horizontal gas distribution pipe; Described vertical gas distribution branch one end connects in bottom, nitrated zone, upper strata to the horizontal gas distribution branch between 2/3 height of bottom, nitrated zone apart from the upper strata, the other end vertically stretches out body matrix top, pond, be connected with extraneous air, vertical gas distribution branch top is higher than hypothallus surface 3-10cm, and be provided with dust cap, prevent that large particulate matter from entering body and stopping up gas distribution pipe.
As preferably, low concavity in the middle of bottom, described vertical current sewage ecological purification groove denitrification zone can be, the indentation lowest part is provided with water shoot, the water shoot surface is covered with the draining aperture, it is outer as sewage draining exit that groove is stretched out in the sealing of water shoot one end, the other end, and sewage draining exit is established sewage draining valve, sewage draining valve is closed during works better, and sewage draining valve is opened during the cell body flushing.
As preferably, upper strata nitrated intra-zone artificial substratum structural stratification and material thickness from top to bottom is as follows: layer of displacement, adopt particle diameter 8-16mm gravel, thickness 10-35cm; Transition layer adopts particle diameter 4-8mm gravel, thickness 8-15cm; The biochemical treatment transition layer adopts special grating 0.2-6mm not have the mud coarse sand, thickness 50-60cm; Particle diameter 8-16mm gravel, thickness 4-8cm are adopted in the top layer; The plant of described vertical current sewage ecological purification groove top plantation is selected from reed, giantreed, cattail, Canna generalis Bailey, cyperus alternifolius, one or more in power grass, Caulis Miscanthis floriduli, rose, Chinese rose, the Flower of Aztec Marigold etc. again;
Described lower floor denitrification zone internal matrix structural stratification and material thickness from top to bottom is as follows: impervious barrier, and adopting 0.5mm two-sided geotextile of above PE film or thickness is the natural clay impervious barrier of 1-5em; Transition layer adopts particle diameter 5-10mm gravel, thickness 10-20cm; The biochemical treatment transition layer adopts cinder hypothallus 0.2-6mm, thickness 50-60cm.
As preferably, sidewall can be certain slope, gradient scope 0-10% around the nitrated zone, described upper strata; Sidewall can be certain slope, gradient scope 0-5% around the described lower floor denitrification zone.
The present invention has following beneficial effect:
Nitrification and denitrification is integrated, adopts the dephosphorization filter residue, high-efficient denitrification and dephosphorization; Simple in structure, floor space is little, economizes the land resource, the water-in and water-out drop is little, sewage need not reflux, the place is unrestricted, treatment scale is unrestricted; Intermittent loading, the ingenious design of oxygen that the upper strata is aerobic, lower floor is held concurrently, the carrying out of realizing the unpowered reoxygenation promotes oxidn of nature, reaction such as nitrated, raising pollutent aerobic treatment efficient; Plant reed, wetland plants such as giantreed, antiacid alkali can be removed the big pollutent of pollution load.
That the artificial marsh sewage treatment system that the present invention relates to has is simple in structure, install easily, water distribution is even, the free convenience of regulation of level, not power consumption, cost are low, can be used for the broad variety sewage disposal, for example sanitary sewage, percolate, rural sewage, petrochemical wastewater, urban storm rainwash and lake stream pollution control etc.Select suitable plant variety to beautify the effect of surrounding enviroment in addition.
Description of drawings
Fig. 1 is a kind of example structure synoptic diagram of the present invention;
Fig. 2 is a kind of structural representation of Fig. 1 water distribution pipe network;
Fig. 3 is the another kind of structural representation of Fig. 1 water distribution pipe network;
Fig. 4 is the structure vertical view of Fig. 1 network of drains;
Fig. 5 is a cloth water branch sectional view.
Among the figure: 1-pretreatment pool, 2-water pump, 3-inlet valve, 4, wetland plant, 5-water distribution pipe network, the nitrated zone of body, 6-pond, the 7-dust cap, the vertical gas distribution of 8-branch, the horizontal gas distribution pipe of 9-, 10-gas distribution aperture, 11-flowing water Valve, 12-water outlet, the 13-branch that vertically catchments, 14-sewage draining exit, 15-sewage draining valve, 16-draining aperture, the 17-water shoot, 18-inlet, body denitrification zone, 19-pond, the 20-water-in, the 21-water distribution is responsible for, 22-cloth water branch, 23-water distribution aperture, 24-level set water branch, the 25-person in charge that catchments
Embodiment
Below by case study on implementation, and in conjunction with the accompanying drawings, technical scheme of the present invention is further described in detail.
In the present embodiment, pre-treatment is finished in three form settling tanks usually, and mud is with periodic cleaning.For the higher sewage of concentration, can add at the filter bed front end and build anaerobic pond.It is the assurance of the permanently effective operation of artificial ecology filter bed that good preliminary precipitation is handled, and also can play the effect of regulating the sewage water yield and water quality simultaneously.Through pretreated sewage, promote by the intermittent type sump pump, according to the controlled variable of setting, be evenly distributed to the surface of the nitrated regional artificial substratum in vertical current sewage ecological purification groove upper strata.
Main body sewage disposal of the present invention zone-vertical current sewage ecological purification groove, it is separated into upper and lower two zones that are connected, sidewall is 5% gradient around the nitrated zone, upper strata, goes to the bottom to be communicated with top, lower floor denitrification zone, and lower floor denitrification zone is a rectangular parallelepiped pond body; Fill artificial substratum in the nitrated pool area in upper strata as sewage water filtration bed and microorganism aerobic oxidation and nitriary, the artificial substratum that lower floor fills in the denitrification zone is as sewage water filtration bed and microorganism hold concurrently oxygen oxidation and denitrification bed.Nitrated zone, upper strata is filled out the matrix of establishing and is respectively from down to up: thickness 10-35cm, the gravel bed of particle diameter 8-16mm; Thickness 8-15cm, the gravel bed of particle diameter 4-8mm; Thickness 50-60cm, the no mud coarse sands layer of particle diameter 0.2-6mm; Thickness 4-8cm, particle diameter 8-16mm gravel top layer.The wetland plant of ecological purification bed top layer plantation is reed and giantreed.
Promote by water pump 2 through pretreated sewage, enter through inlet valve 3 and intersect the water distribution of water distribution pipe network 5 and be responsible for 21 and cloth water branch 22, finally enter pond body hypothallus by the water distribution aperture 23 on the cloth water branch 22.Cloth water branch 22 is responsible for 21 on same horizontal plane with water distribution, perpendicular linking to each other is " king " font (as shown in Figure 2) or intersects " king " font (as shown in Figure 3), cloth water branch 22 end closures, body evenly has water distribution aperture 23 every 10-20cm, this water distribution aperture left-right symmetry, and all be positioned at below the horizontal center line of body.
Unpowered gas distribution system is made up of 3-5 group gas distribution pipe network, and they evenly are embedded in nitrification tank inside, upper strata.Each group gas distribution pipe network all is made up of with vertical gas distribution branch 8 the horizontal gas distribution branch that is connected, wherein can suitably tilt along the pond body gradient near the vertical gas distribution branch of pond external wall, have countless gas distribution apertures 10 on the body, wherein vertical gas distribution branch stretches out the external part in pond in 8 upper ends and all adds a cover dust cap.This unpowered gas distribution system can make pond body matrix nature oxygen enrichment and oxygen enrichment full and uniform, satisfy the needs that microorganism is supported reaction well, the sewage that nitrated zone flows into lower floor denitrification zone from the upper strata also can increase dissolved oxygen under the effect of flow process at unpowered gas distribution system in addition, make lower floor sewage disposal zone form the oxygen environment of holding concurrently, improve the oxidation efficiency of sewage.
Sewage after handle in nitrated zone, upper strata directly infiltrates lower floor's denitrification treatment zone, fills out the matrix of establishing in this zone and is followed successively by thickness 10-20cm from down to up, the gravel of particle diameter 5-10mm; Thickness 50-60cm, the cinder hypothallus of particle diameter 0.2-6mm.Be equipped with the submerged type pipe network that catchments in this pond body, have following characteristics: vertically catchment branch 13 and level set water branch 24 and catchment and be spatial vertical between being responsible for 25 and distribute, intermediate duct communicates; Inlet is located at branch's 13 ends that vertically catchment, and forms for several that have on the circular pipeline cross section aperture that catchments, and the distance of body bottom, the whole pond of inlet distance is not more than 1/3 of denitrification zone total height; Level set water branch 24, catchment be responsible for 25 and inlet be positioned at same level height, their level attitude is that lower floor denitrification cell body top is between 2/3 height of distance denitrification cell body top.The nitrated regional sewage in upper strata enters that lower floor denitrification zone is follow-up continuously oozes under vertical, to bottom, denitrification zone, the pipe network water outlet is located at denitrification cell body top owing to catchment, though enter inlet in pond body bottom through denitrification zone processing to the water outlet bottom the body of pond, but water outlet at once, sewage is upwards built up in the bottom, and the ramose water outlet water level for the treatment of vertically to catchment can be by the water outlet water outlet after reaching the water outlet height.The catchment effect of pipe network of submerged type is that sewage residence time in lower floor's denitrification bed is increased, and builds the oxygen environment of holding concurrently, and makes the degraded of organism and total nitrogen more abundant.
As shown in Figure 1, the present embodiment bottom is provided with blow-off pipe, and the pipe shaft of blow-off pipe has a large amount of blowdown apertures, links to each other with the external world by sewage draining exit 14, is provided with sewage draining valve 15 before the sewage draining exit.Sewage draining valve was closed when this artificial marsh sewage treatment system normally moved.When filter bed hypothallus generation obstruction maybe needs to clear up, sewage draining valve is opened, logical filter tank wash-down water in the water distributor net of top, the sewage after the flushing is discharged outside the filter tank by blow-off pipe, reaches the purpose of system maintenance.
The main technologic parameters of present embodiment is as follows:
The nitrated region area 120m in upper strata 2, height 1.0m, the denitrification zone area 100m of lower floor 2, height 0.8m.Sewage load 20-100t/d, hydraulic detention time 1-4 days.
Following table is depicted as the principal pollutant treatment effect of certain domestic sewage in rural areas by using through this power-free integrated constructed wetland:
Water-quality guideline ?COD(mg/L) BOD(mg/L) SS(mg/L) NH 3-N(mg/L) TP(mg/L)
Water inlet ?400 200 100 35 4
Water outlet ?42 15 13 4 0.4

Claims (9)

1. sewage disposal power-free integrated constructed wetland, comprise by artificial substratum, pretreatment system for sewage, water distribution system, water gathering system, gas distribution system, drainage in nitrated zone and denitrification zone vertical current sewage ecological purification groove dimerous, the filling slot and be grown in plant on the artificial substratum, it is characterized in that:
Described vertical current sewage ecological purification groove is divided into two subregions up and down: nitrated zone and denitrification zone, nitrated zone are last, and the denitrification zone is following, and described artificial substratum is filled in respectively in nitrated zone and the denitrification zone;
Described pretreatment system for sewage is one or more pre-treating technologies that utilize in grid, three form settling tanks, the anaerobic pond, sewage to different pollution loads carries out pre-treatment, through the sanitary sewage of pre-treatment through water pump lifting or rely on the nature liquid level discrepancy in elevation to enter water distribution system;
Pretreated sewage is uniformly distributed on the nitrated zone of vertical subsurface flow formula ecological purification groove by intersection water distribution pipe network, the vertical successively artificial substratum layer that infiltrates nitrated zone and denitrification zone;
Water distribution system is carried out intermittently water distribution to the ecological purification groove, and bottom the nitrated zone and inside is provided with unpowered gas distribution system on the upper strata, and continuous reoxygenation is realized in nitrated zone;
The nitrated regional water outlet in upper strata directly enters lower floor denitrification zone, hold concurrently in this zone oxygen effect and denitrification; Lower floor is provided with the outlet system that catchments in the denitrification zone, and inlet is located at below, denitrification zone, and water outlet is located at top, denitrification zone.
2. sewage disposal power-free integrated constructed wetland according to claim 1, it is characterized in that: described water distribution system is the water distribution pipe network that is arranged on 5-10cm under the nitrated regional matrix of the upper strata sewage top layer, this water distribution pipe network includes inlet valve, water-in, water distribution is responsible for is responsible for the cloth water branch that is connected with a plurality of with this water distribution, water distribution is responsible for the cloth water branch and is distribution of vertical " king " word or the distribution of intersection " king " word, has the water distribution aperture on the cloth water branch.
3. sewage disposal power-free integrated constructed wetland according to claim 1, it is characterized in that: described inlet is located at the branches end of vertically catchmenting, form for several that have on the circular pipeline cross section aperture that catchments, the distance of body bottom, the whole pond of inlet distance is not more than 1/3 of denitrification zone total height.
4. according to claim 1 or 2 or 3 described sewage disposal power-free integrated constructed wetlands, it is characterized in that: described gas distribution system is to be distributed in the gas distribution pipe network that one or more groups pipe shaft of upper strata is covered with aperture; Every group of gas distribution pipe network is by horizontal gas distribution pipe, form with vertical several the vertical gas distribution branches that link to each other of horizontal gas distribution pipe; Described vertical gas distribution branch one end connects in bottom, nitrated zone, upper strata to the horizontal gas distribution branch between 2/3 height of bottom, nitrated zone apart from the upper strata, the other end vertically stretches out body matrix top, pond, be connected with extraneous air, vertical gas distribution branch top is higher than hypothallus surface 3-10cm, and is provided with dust cap.
5. according to claim 1 or 2 or 3 described sewage disposal power-free integrated constructed wetlands, it is characterized in that: low concavity in the middle of the bottom, denitrification zone of described vertical current sewage ecological purification groove is, the indentation lowest part is provided with water shoot, the water shoot surface is furnished with a plurality of draining apertures, the sealing of water shoot one end, it is outer as sewage draining exit that the other end stretches out groove, and sewage draining exit is established sewage draining valve.
6. according to claim 1 or 2 or 3 described sewage disposal power-free integrated constructed wetlands, it is characterized in that: described upper strata nitrated intra-zone artificial substratum structural stratification and material thickness from top to bottom is as follows: layer of displacement, adopt particle diameter 8-16mm gravel, thickness 10-35cm; Transition layer adopts particle diameter 4-8mm gravel, thickness 8-15cm; The biochemical treatment transition layer adopts special grating 0.2-6mm not have the mud coarse sand, thickness 50-60cm; Particle diameter 8-16mm gravel is adopted, thickness 4-8cm in the top layer; The plant of described vertical current sewage ecological purification groove top plantation is selected from reed, giantreed, cattail, Canna generalis Bailey, cyperus alternifolius, one or more in power grass, Caulis Miscanthis floriduli, rose, Chinese rose, the Flower of Aztec Marigold again.
7. according to claim 1 or 2 or 3 described sewage disposal power-free integrated constructed wetlands, it is characterized in that: the described lower floor denitrification inner artificial substratum in zone structural stratification and material thickness from top to bottom is as follows: transition layer, adopt particle diameter 5-10mm gravel, thickness 10-20cm; The biochemical treatment transition layer adopts cinder hypothallus 0.2-6mm, thickness 50-60cm.
8. sewage disposal power-free integrated constructed wetland according to claim 7 is characterized in that: it is the natural clay impervious barrier that above two-sided geotextile of PE film of 0.5mm or thickness are 1-5cm that employing thickness is arranged below the described transition layer.
9. according to claim 1 or 2 or 3 described sewage disposal power-free integrated constructed wetlands, it is characterized in that: sidewall is the gradient of 0-10% around the nitrated zone, described upper strata; Sidewall is the gradient of 0-5% around the described lower floor denitrification zone.
CN2009100963997A 2009-02-26 2009-02-26 Power-free integrated constructed wetland waste water treatment technology CN101538086B (en)

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CN1800055A (en) * 2005-12-15 2006-07-12 徐祖信 Modified artificial swamp sewage treatment method

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