CN101269897B - Method and system for processing sanitary sewage with anoxygenous-aerobic vertical current artificial wet land - Google Patents

Method and system for processing sanitary sewage with anoxygenous-aerobic vertical current artificial wet land Download PDF

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CN101269897B
CN101269897B CN200810027812XA CN200810027812A CN101269897B CN 101269897 B CN101269897 B CN 101269897B CN 200810027812X A CN200810027812X A CN 200810027812XA CN 200810027812 A CN200810027812 A CN 200810027812A CN 101269897 B CN101269897 B CN 101269897B
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water
vertical current
sewage
constructed wetland
current constructed
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CN101269897A (en
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崔理华
朱夕珍
孟雪
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South China Agricultural University
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South China Agricultural University
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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
    • 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 method of treating domestic sewage in an anoxic-aerobic vertical current manual marsh. The domestic sewage enters into a sedimentation tank firstly for removing sand grain and larger granular suspended substance, and then is treated by the vertical current manual marsh for removing most of SS, COD, and BOD5, performs the nitrification of the wastewater, and flows to a reservoir, and flows again into the vertical current manual marsh after being lifted by a water pump to an anoxic pool for the denitrification, and the removal of phosphor in the wastewater is completedwhen removing organic matter and denitriding. The invention discloses a system of realizing the method at the same time. The cost of treating the sewage is low by adopting the method of the invention, the occupation area is small, and the phosphor and nitrogen removal effect is good.

Description

The anaerobic-aerobic vertical current constructed wetland is handled the method and the system thereof of sanitary sewage
Technical field
The present invention relates to sewage place technical field, be specifically related to method and system thereof that a kind of anaerobic-aerobic (A/O type) vertical current constructed wetland is handled sanitary sewage.
Background technology
The sanitary sewage artificial wet land treating method mainly contains three kinds of surface current, horizontal flow and vertical currents.
The about 30cm of surface fluidized bed height, the employing normal soil is a treatment media, and in medium layer, plant and be implanted with the large-scale emergent that secretes the oxygen ability such as reed, wild rice stem, cattail, power flower, Canna generalis Bailey, calamus, Scirpus tabernaemontani and wild-rice etc. again, this system and natural wetland are the most approaching, sewage is in the surface flow of filler, water level is more shallow, and the removal of most organic is to utilize the oxygen ability of secreting of waterplant to provide oxygen for the microbial film on the artificial swamp matrix.
The horizontal flow artificial wetland system: horizontal fluidized bed height 80cm, generally fill gravel matrix.After sewage is removed most of organism and nitration treatment through vertical fluidized bed earlier, gravity flow enters horizontal fluidized bed, and water is seepage flow under filling surface, and water level is darker, thereby can make full use of on filling surface and the root system of plant microbial film and various effect is disposed of sewage, treatment effect is better.
The vertical current constructed wetland system, more than the general vertical fluidized bed height 100cm, usually adopt thinner matrix such as sand etc. as filtration media, sewage enters vertical fluidized bed top layer water distribution uniformity through water pipe, in vertical process of oozing down, obtain handling, the operation scheme of alternation of wetting and drying makes the microorganism in the matrix can obtain competent oxygen, thereby has improved its oxygen consumption processing power and treatment effect.In vertical fluidized bed, plant and be implanted with Canna generalis Bailey, power flower, Chinese rose and Caulis Miscanthis floriduli etc. again.
Existing sanitary sewage artificial wet land treating method all exists weak point:
Surface current artificial wetland's method less investment, but can not make full use of abundant root system of plant, filler can not be given full play to its effect, and it is little to load, and winter, the cold district top layer easily froze, and can grow mosquitos and flies summer, produces stink.Must ensure sufficient dissolved oxygen is arranged in the water in the time of the surface current design to finish NH 4 +-N's is nitrated, makes denitrifying bacterium suitable anoxic and aerobic alternate environment and competent organism be arranged as carbon source again simultaneously, to ensure carrying out smoothly of denitrification denitrogenation approach; The surface current artificial wetland system is also relatively poor to the removal ability of phosphorus in the sanitary sewage.
Horizontal flow causes nitrification effect because of oxygen supply condition is relatively poor be not very strong, and nitrogen removal rate is not high yet, only is 30~45%; Secondly, horizontal flow artificial wetland adopts the phosphor-removing effect of Wingdale, marble or rhombspar matrix not high, only is 30~50%.Can not satisfy actual needs.
The treatment process of vertical current constructed wetland has stronger oxygen transfer ability.But can not well provide denitrification needed anoxic environment, so vertical current constructed wetland is not good to the removal effect of total nitrogen in the sewage.
Summary of the invention
The objective of the invention is to overcome the technical deficiency of existing sanitary sewage artificial wet land treating method, provide a kind of anaerobic-aerobic (A/O type) vertical current constructed wetland to handle the method for sanitary sewage.
Another object of the present invention provides the system that realizes described method.
To achieve these goals, the present invention adopts following technical scheme:
Provide a kind of anaerobic-aerobic (A/O type) vertical current constructed wetland to handle the method for sanitary sewage, may further comprise the steps:
(1) sewage is removed sand grains and suspended particulate matter through precipitation;
(2) sewage after the precipitation process is introduced anoxic pond (A), enters water distributor by anoxic pond, batches on vertical current constructed wetland (O) matrix by water distributor;
(3) hold back and adsorb through the filtration of substrate of vertical-flow constructed wetlands, microbiological deterioration is removed the picked-up of most of oxygen consumption organic and root system of plant and is removed part nitrogen and TP in the sewage, carries out nitration reaction; Nitrify water after the nitration reaction carries out flowing to retention basin behind the part anti-nitration reaction with the sewage of handling through step (1) is mixed in the bottom of vertical current constructed wetland;
(4) water in the retention basin is evacuated to anoxic pond; Introduce a part of sewage of handling through step (1) as carbon source, the water in the retention basin mixes in anoxic pond with carbon source sewage, carries out anti-nitration reaction;
(5) sewage behind the anti-nitration reaction passes through vertical current constructed wetland once more, begins next circulation.
Described substrate of vertical-flow constructed wetlands is the mixture of the blast furnace slag and the peat composed of rotten mosses.The volume ratio of the described blast furnace slag and the peat composed of rotten mosses is preferably 4~19: 1.
The volume ratio of described nitrify water of step (3) and internal carbon source sewage is 4~6: 1.
The described root system of plant of step (3) is the Canna generalis Bailey root system.Can in vertical current constructed wetland, plant Canna generalis Bailey, utilize the plant picked-up effect of Canna generalis Bailey to remove part phosphorus.
The water in the described retention basin of step (4) and the volume ratio of carbon source sewage are 4: 1.
The present invention provides the described combined artificial wetland of a kind of realization to handle sanitary sewage method system simultaneously, comprises settling tank, elevated tank, anoxic pond, vertical current constructed wetland and retention basin; Be provided with water pump and be connected water pipe between described settling tank and the elevated tank; Described elevated tank links to each other with the vertical current constructed wetland bottom with anoxic pond respectively by water pipe; Described vertical current constructed wetland is provided with flowing water Valve and communicates with retention basin; Described anoxic pond links to each other by water pipe with retention basin.
Described vertical current constructed wetland is filled with matrix and is furnished with water distributor; Described anoxic pond is in the vertical current constructed wetland top position, and its bottom is provided with and porosely links to each other with the water distributor of vertical current constructed wetland; Described retention basin is equipped with submersible pump at the vertical current constructed wetland lower position in the retention basin, the bottom, pond is provided with water discharging valve.
Described water distributor is responsible for by water distribution and many water distribution branch pipes are formed " king " font, is distributed in 5~10cm place under the substrate of vertical-flow constructed wetlands surface; Described water distribution is responsible for the centre that is distributed in vertical current constructed wetland, and its length is identical with matrix length; Described water distribution branch pipe length is half of matrix width, and the one end is fixed on the water distribution person in charge's both sides and is connected with the water distribution person in charge, the other end sealing, and the downward position of water distribution branch pipe has aperture.
Be provided with dividing plate in the described anoxic pond.
After the present invention removes the suspended substance (SS) of sand grains and larger particles through elder generation through settling tank earlier with sewage, the suction elevated tank, gravity flow enters vertical current constructed wetland again, removes most of SS, COD, BOD 5And carry out NITRIFICATION OF WASTEWATER, arrive the retention basin of vertical current constructed wetland below by the flowing water Valve of vertical current constructed wetland, the effect of retention basin is temporary transient water storage, nitrify water is taken out the anoxic pond that rises to the vertical current top by water pump thus, with as the sewage of carbon source in the anoxic pond hybrid reaction, again from flowing to vertical current constructed wetland, after the retention basin water outlet.Anoxic pond is on vertical current constructed wetland, and its bottom porosely links to each other with the water distributing pipe of vertical current constructed wetland; Vertical current constructed wetland is filled with treatment media, and wetland bed upward the kind has Canna generalis Bailey; Retention basin is equipped with submersible pump in the retention basin below vertical current constructed wetland, water discharging valve is arranged at pond bottom, can control whether draining artificially.The treatment media of filling in the described vertical current constructed wetland is the mixed-matrix of the blast furnace slag and the peat composed of rotten mosses.The effect of vertical current constructed wetland is that the major part of oxygen consumption organic is removed and nitrated fully to sanitary sewage; The effect of anoxic pond is through the nitrify water of vertical current constructed wetland discharge and provides the sewage of carbon source to carry out denitrification here, further finishes NH 4 +The removal of-N.
The waste pipe that settling tank picks out passes to the bottom of vertical current constructed wetland with a part of sewage, and sewage is further finished NH as internal carbon source 4 +The removal of-N.
The waste pipe that settling tank picks out flows directly into anoxic pond as carbon source with a part of sewage, mixes anoxic pond with water from the retention basin suction, and sewage is preferably 1: 4 with volume ratio from the water of retention basin suction.Purpose is to utilize organism (BOD) in the sanitary sewage as carbon source, under the anoxia condition of anoxic pond, finishes the denitrification denitrogenation process of nitrate in anoxic pond in the vertical current constructed wetland treat effluent.
The waste pipe that settling tank picks out is directly introduced the bottom of vertical current constructed wetland as carbon source with another part sewage, mixing in the bottom of vertical current constructed wetland with the water of handling through the vertical current constructed wetland filler, sewage is preferably 1: 4 with volume ratio through the water of vertical current constructed wetland filler processing~and 6.Purpose is to utilize organism (BOD) in the sanitary sewage as carbon source, under vertical current constructed wetland bottom waterflooding anoxia condition, finishes the denitrification denitrogenation process of nitrate.In vertical current constructed wetland, also experienced anti-nitration reaction one time, finished by the absorption of denitrification and waterplant etc. the part of nitrogen is removed.
In sum, organism and denitrogenation method are in anaerobic-aerobic (A/O type) the vertical current constructed wetland processing sanitary sewage: after sanitary sewage is introduced into the suspended substance (SS) of settling tank removal sand grains and larger particles, after vertical current constructed wetland is handled, remove most of SS, COD, BOD again 5And carry out NITRIFICATION OF WASTEWATER, then flow to retention basin, flowing into vertical current constructed wetland once more through water pump lifting to anoxic pond denitrification handles, in vertical current constructed wetland, also experienced anti-nitration reaction one time, finished by the absorption of denitrification and waterplant etc. the part of nitrogen is removed.
A/O type vertical current constructed wetland removes that the phosphorus method is in the sanitary sewage: utilize the flow process of above-mentioned organism and denitrogenation method, when removing organism and denitrogenation, finish to waste water in the removal of phosphorus.Concrete grammar is: fill blast furnace slag and the peat composed of rotten mosses mixed-matrix that phosphorus is had very strong power surely in vertical current constructed wetland, can remove most phosphorus in the sewage; In addition, the plant picked-up effect of Canna generalis Bailey can be removed a part of phosphorus in the sewage.
Compared with prior art, the present invention has following beneficial effect:
1. utilize vertical current constructed wetland to remove part TN, TP, COD, BOD 5, SS and waste water most nitrated, utilize the denitrification of anoxic pond waste water; Sewage enters anoxic pond under the anaerobic environment condition after vertical current constructed wetland is nitrated, utilize organism in the sewage (BOD) to finish the denitrification denitrogenation effect as carbon source.A/O type vertical current constructed wetland is to COD, BOD in the municipal effluent 5, NH 4 +The clearance of-N and TN reaches respectively more than 75~85%, 70~80%, 70~90% and 50~60%, COD and BOD in the treat effluent 5Concentration respectively less than 60 and 20mg/L, reach municipal sewage plant's first discharge standard basically.
2. utilize the blast furnace slag of vertical current constructed wetland filling and the removal function that peat composed of rotten mosses mixed-matrix is finished most phosphorus in the sewage; Utilize the plant picked-up effect of plantation Canna generalis Bailey in the vertical current constructed wetland to remove part phosphorus simultaneously, thereby A/O type vertical current constructed wetland is reached more than 80~85% to the clearance of TP in the municipal effluent, TP concentration in the treat effluent is less than 1mg/L, substantially reached municipal sewage plant's first discharge standard, and the invention technology is to reaching more than 10 years in work-ing life of phosphorus.
3. in order further to improve the removal effect of total nitrogen, a part of sewage is directly added the vertical current constructed wetland bottom, utilize that organism (BOD) will be reduced into N from the nitrate attitude nitrogen in the treat effluent of vertical current bed top as carbon source in the anoxic of vertical fluidized bed and aerobic alternation condition and the sewage under the anoxic environment of vertical fluidized bed bottom 2O and N 2
4. vertical current constructed wetland, anoxic pond, retention basin upper and lower settings spatially only need to be equivalent to a vertical current constructed wetland bed surface long-pending, has saved floor space, also reduces initial cost and processing cost simultaneously.
Description of drawings
Fig. 1 is an A/O type vertical current constructed wetland anoxic pond structure iron;
Fig. 2 is A/O type vertical current constructed wetland vertical current bed structure figure;
Fig. 3 is an A/O type vertical current constructed wetland retention basin structure iron;
Fig. 4 is an A/O type vertical current constructed wetland entire system structure iron.
Embodiment
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Embodiment 1
According to the steps of processing sanitary sewage:
(1) sewage is removed sand grains and suspended particulate matter through precipitation;
(2) sewage after the precipitation process is introduced anoxic pond, enters water distributor by anoxic pond, batches on substrate of vertical-flow constructed wetlands by water distributor;
(3) hold back and adsorb through the filtration of substrate of vertical-flow constructed wetlands, microbiological deterioration is removed the picked-up of most of oxygen consumption organic and root system of plant and is removed part nitrogen and TP in the sewage, carries out nitration reaction; Nitrify water after the nitration reaction is in the bottom of vertical current constructed wetland and internal carbon source sewage is mixed carries out flowing to retention basin behind the part anti-nitration reaction;
(4) nitrify water in the retention basin is evacuated to anoxic pond; Introduce a part of sewage of handling through step (1) as carbon source, nitrify water mixes in anoxic pond with carbon source sewage, carries out anti-nitration reaction;
(5) sewage behind the anti-nitration reaction passes through vertical current constructed wetland once more, begins next circulation.
Realize that system for carrying out said process comprises settling tank, elevated tank, anoxic pond, vertical current constructed wetland and retention basin.
Vertical current constructed wetland is made up of bed body and water distributor, and the bed wall of bed body is made with non-leakage material, and the bed wall is the brick structure of finishing cement, and the bottom is a concrete structure.The bed body is the mixed-matrix layer, and thickness is 85cm, fills blast furnace slag and peat composed of rotten mosses mixed-matrix.Water distributor is distributed in the following 5~10cm place of mixed-matrix laminar surface, and plants the plant Canna generalis Bailey in vertical fluidized bed body.
As modular design of the present invention, system architecture is shown in accompanying drawing 1~4, among the figure: settling tank 1, water pump 2, elevated tank 3, waste pipe 4, valve water meter 5, water distribution are responsible for 6, water distribution branch pipe 7, anoxic pond sewage carbon source add pipe 8, vertical fluidized bed sewage carbon source adds pipe 9, nitrify water return line 10, water pump 11, mixed-matrix layer 12, anoxic pond flowing water Valve 13, vertical current constructed wetland flowing water Valve 14, retention basin flowing water Valve 15, dividing plate 16.
" king " font water distributor is distributed in following 5~10cm place, mixed-matrix surface, water distributor is made up of the water distribution person in charge 6 and many water distribution branch pipes 7, the water distribution person in charge 6 is distributed in the centre of a body, its length is suitable with the bed body length, wherein end sealing, and the other end is connected with anoxic pond water outlet 13, water distribution branch pipe 7 is fixedly connected on the both sides that water distribution is responsible for, the other end sealing, its length are half of bed body width, and the downward position of water distribution branch pipe has aperture.
Waste pipe 4 is installed on water inlet, on waste pipe 4, is provided with valve and water meter 5, with the water intake velocity of control sewage.
Inherent 1/3 place near vertical fluidized bed of anoxic pond establishes a cement baffle 16.
Vertical current sewage carbon source adding pipe 9 is provided with water meter 5, one ends and directly is connected with waste pipe 4, and the other end inserts vertical fluidized bed mixed-matrix layer 12 bottom along pool wall.
Nitrify water return line 10 is provided with water meter 5, one ends and directly is connected with water pump 11, and the other end inserts anoxic pond along pool wall.
Anoxic pond flowing water Valve 13 and vertical current flowing water Valve 14 can be controlled the speed of water outlet.
Day designing treatment water yield 0.32-1.28m 3/ d.
Design variable:
Grid: adopt 2cm * 2cm wire netting, stand in the inspection chamber that septic tank effluent mouth and underground aqueduct join.
Settling tank: size is 2.0m * 1.8m * 2.0m, available depth 1.0m, useful volume 3.6m 3, the brick structure finishing cement.
Anoxic pond design length * wide * height is 1.0m * 0.80m * 2.0m, the brick structure finishing cement.
The vertical current constructed wetland size can be 1.6m * 1.0m * 1.0m with reference to length * wide * height, the brick structure finishing cement.Single pond practical dimensions can be with reference to length * wide 1.0m * 1.0m * 0.85m.Wherein, mixed-matrix bed thickness 1.00m is made up of blast furnace slag and peat composed of rotten mosses mixing.
Experimental system is divided two vertical fluidized bed parallel runnings, the contrast of vertical fluidized bed for not planting plant, and another vertical fluidized bed plantation plant, the plant of plantation is a Canna generalis Bailey.
The present invention is such realization: sand grains and suspended particulate matter that sanitary sewage at first removes in the decontaminated water through settling tank 1, promote with water pump 2 then and enter elevated tank 3, enter anoxic pond along waste pipe 4 again, the hole that sewage is provided with through the anoxic pond bottom enters water distribution and is responsible for 6, before entering the water distribution person in charge 6, by-pass valve control and metering water meter 5 are arranged, water distribution branch pipe 7 directly is placed on the surface of vertical fluidized bed mixed-matrix, the aperture that sewage is evenly offered from water distribution branch pipe 7 is batched on vertical fluidized bed mixed-matrix layer 12, sewage is through 12 diafiltration vertically downward of mixed-matrix layer, because the filtration of matrix holds back to finish with the picked-up effect of adsorption and root system of plant the major part of oxygen consumption organic and TP removed and nitrated.Internal carbon source sewage enters the bottom of vertical fluidized bed through pipeline 9, and is mixed with the water that the mixed matrix treatments of oozing is down crossed, and stays for some time in the bottom of vertical fluidized bed, finishes the part anti-nitration reaction.The treat effluent of vertical current constructed wetland can be utilized the drop between vertical current constructed wetland bed body and the retention basin, opens valve 14, and the water outlet gravity flow enters retention basin.Nitrify water is promoted to anoxic pond through water pump 11 by pipeline 10, water meter 5 is housed on the pipeline 10, introduce a part of sewage from high-water case 3 simultaneously and directly be added to anoxic pond as carbon source by pipeline 4, mix in anoxic pond with the nitrated water outlet of vertical fluidized bed, carry out denitrification, overflow enters water distribution again and is responsible for 6 by dividing plate 16 then, and this is a complete circulation.
(mg/L is %) shown in table 1, table 2, table 3, table 4 and table 5 for treatment effect.
Wherein, table 1 be under the different reflux ratios A/O type vertical current constructed wetland system to the treatment effect situation of sanitary sewage;
Table 2 is the treatment effect situation of the interior denitrification of vertical current to sanitary sewage;
Table 3 is the interior increase NH with quantity of reflux of anoxic pond 4 +-N, NO 3 -The dynamic changes of concentration of-N;
Table 4 is with residence time NH in the anoxic pond 4 +-N, NO 3 -The dynamic changes of concentration of-N and TN;
Table 5 is the treatment effect of A/O type vertical current constructed wetland system to sanitary sewage.
Table 1: system is to the treatment effect situation of sanitary sewage under the different reflux ratios
Table 4: anoxic pond is interior with residence time NH 4 +-N, NO 3 -The dynamic changes of concentration of-N and TN
Table 5:A/O type vertical current constructed wetland system is to the treatment effect of sanitary sewage

Claims (9)

1. an anaerobic-aerobic vertical current constructed wetland is handled the method for sanitary sewage, it is characterized in that may further comprise the steps:
(1) sewage is removed sand grains and suspended particulate matter through precipitation;
(2) sewage after the precipitation process is introduced anoxic pond, enters water distributor by anoxic pond, batches on substrate of vertical-flow constructed wetlands by water distributor;
(3) hold back and adsorb through the filtration of substrate of vertical-flow constructed wetlands, microbiological deterioration is removed the picked-up of most of oxygen consumption organic and root system of plant and is removed part nitrogen and TP in the sewage, carries out nitration reaction; Nitrify water after the nitration reaction carries out flowing to retention basin behind the part anti-nitration reaction with the sewage of handling through step (1) is mixed in the bottom of vertical current constructed wetland;
(4) water in the retention basin is evacuated to anoxic pond; Introduce a part of sewage of handling through step (1) as carbon source, the water in the retention basin mixes in anoxic pond with carbon source sewage, carries out anti-nitration reaction;
(5) sewage behind step (4) anti-nitration reaction passes through vertical current constructed wetland once more, begins next circulation; The whether draining of artificial control retention basin.
2. handle the method for sanitary sewage according to the described anaerobic-aerobic vertical current constructed wetland of claim 1, it is characterized in that described substrate of vertical-flow constructed wetlands is the mixture of the blast furnace slag and the peat composed of rotten mosses.
3. handle the method for sanitary sewage according to the described anaerobic-aerobic vertical current constructed wetland of claim 2, the volume ratio that it is characterized in that the described blast furnace slag and the peat composed of rotten mosses is 4~19: 1.
4. handle the method for sanitary sewage according to the described anaerobic-aerobic vertical current constructed wetland of claim 1, it is characterized in that the described nitrify water of step (3) and the volume ratio of the sewage of handling through step (1) are 4~6: 1.
5. handle the method for sanitary sewage according to the described anaerobic-aerobic vertical current constructed wetland of claim 1, it is characterized in that the described root system of plant of step (3) is the Canna generalis Bailey root system.
6. handle the method for sanitary sewage according to the described anaerobic-aerobic vertical current constructed wetland of claim 1, it is characterized in that the water in the described retention basin of step (4) and the volume ratio of carbon source sewage are 4: 1.
7. a system that realizes the method for the described anaerobic-aerobic vertical current constructed wetland processing of claim 1 sanitary sewage is characterized in that comprising settling tank, elevated tank, anoxic pond, vertical current constructed wetland and retention basin; Be provided with water pump and be connected water pipe between described settling tank and the elevated tank, described elevated tank links to each other with the vertical current constructed wetland bottom with anoxic pond respectively by water pipe; Described vertical current constructed wetland is filled with matrix and is furnished with water distributor, and is provided with flowing water Valve and communicates with retention basin; Described anoxic pond is in the vertical current constructed wetland top position, and its bottom is provided with and porosely links to each other with the water distributor of vertical current constructed wetland; Described anoxic pond links to each other by water pipe with retention basin; Described retention basin is equipped with submersible pump at the vertical current constructed wetland lower position in the retention basin, the bottom, pond is provided with water discharging valve.
8. system according to claim 7 is characterized in that described water distributor is responsible for by water distribution and many water distribution branch pipes are formed " king " font, is distributed in 5~10cm place under the substrate of vertical-flow constructed wetlands surface; Described water distribution is responsible for the centre that is distributed in vertical current constructed wetland, and its length is identical with matrix length; Described water distribution branch pipe length is half of matrix width, and the one end is fixed on the water distribution person in charge's both sides and is connected with the water distribution person in charge, the other end sealing, and the downward position of water distribution branch pipe has aperture.
9. system according to claim 7 is characterized in that being provided with dividing plate in the described anoxic pond.
CN200810027812XA 2008-04-30 2008-04-30 Method and system for processing sanitary sewage with anoxygenous-aerobic vertical current artificial wet land Active CN101269897B (en)

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CN101462796B (en) * 2008-12-30 2012-02-01 中国科学院水生生物研究所 Method and apparatus for supplementing composite vertical current constructed wetland carbon source
CN102815786B (en) * 2011-06-09 2015-09-02 中国水产科学研究院 Impact type integration denitrification bio-reactor
CN102910740B (en) * 2012-11-09 2014-05-21 上海市城市排水有限公司 System for treating constructed wetland fillers of organic composite slag

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