CN101462796B - Method and apparatus for supplementing composite vertical current constructed wetland carbon source - Google Patents
Method and apparatus for supplementing composite vertical current constructed wetland carbon source Download PDFInfo
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- CN101462796B CN101462796B CN2008102463089A CN200810246308A CN101462796B CN 101462796 B CN101462796 B CN 101462796B CN 2008102463089 A CN2008102463089 A CN 2008102463089A CN 200810246308 A CN200810246308 A CN 200810246308A CN 101462796 B CN101462796 B CN 101462796B
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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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Abstract
The invention discloses a method and a device for replenishing a carbon source of a composite vertical flow manpower wetland. The method comprises that: firstly, an aeration pipe of the composite vertical flow manpower wetland is connected with an emptying pipe of which the pipe wall is provided with pores through a tee to form a carbon source conveying pipeline, and the inside of the wetland is provided with a filler and is grown with plants; secondly, glucose in a dissolution tank is dissolved through tap water; and finally, the liquid carbon source is pumped to the venting pipe of the surface layer of the wetland through a metering pump and flows out through the pores arranged in the pipe wall of the emptying pipe. The device has the following connecting relations: the metering pump isconnected with the carbon source dissolution tank and a connecting hose respectively; the aeration pipe of the composite vertical flow manpower wetland is connected with the connecting hose and the emptying pipe of which the pipe wall is provided with the pores respectively; the aeration pipe of the composite vertical flow manpower wetland and the emptying pipe of which the pipe wall is provided with the pores of the bottom of the wetland are connected through the tee; and the emptying pipe of which the pipe wall is provided with the pores is positioned on the bottom layer of the wetland. Themethod is simple, feasible and convenient to operate, can effectively improve denitrifying efficiency of the composite vertical flow wetland, saves the carbon source and has obvious economic benefit.
Description
Technical field
The invention belongs to the environmental engineering technical field of sewage, more specifically relate to a kind of method of supplementing composite vertical current constructed wetland carbon source, also relate to a kind of device of supplementing composite vertical current constructed wetland carbon source method simultaneously, be applicable to the processing of low carbon-nitrogen ratio sewage.
Technical background
Artificial swamp is the 20th century a kind of novel sewage treatment process that grow up of the seventies; Have characteristics such as efficient height, cost is low, operational management is simple, aspect the processing of sewage, extraordinary trade effluent, mining sewage, agricultural and livestock industry sewage, refuse tip percolate and aquiculture waste water application is being arranged all.
The main path of artificial swamp denitrogenation is the nitrification and denitrification effect that relies on mikrobe, and the removal amount of other removal approach such as plant absorbing, ammonia nitrogen volatilization etc. is considerably less.Organonitrogen in the wet land system is at first accomplished the ammonifying process that transforms to ammonia nitrogen by the ammonifying bacteria effect, and ammonia nitrogen continues to be converted into nitric nitrogen (NO under the effect of nitrococcus, nitrifier
2 -, NO
3 -), last nitrous acid nitrogen or nitrate nitrogen are reduced to N under denitrification
2O and N
2From system, get rid of.The removal of the nitrogen in the system mainly is the result of denitrification.It is a reduction reaction, needs organic carbon source that electron donor is provided.Thereby, can provide the required carbon source of competent anti-nitration reaction just directly determining the height of wet land system denitrogenation ability.China south is the sewage of low ratio of carbon to ammonium more commonly, and nitric efficiency is low when carrying out a biological disposal upon, and causes the water outlet TN can't qualified discharge.The nitric efficiency that how to solve this type of low carbon-nitrogen ratio sewage has become the focus of recent research.
The mode of current additional constructed wetland carbon source mainly is in water inlet, to replenish; Just change a kind of mode of water inlet character in essence, and these ways can cause the part carbon source on the wetland upper strata aerobic decomposition to take place, cause the waste of carbon source; Increase unnecessary cost of sewage disposal; Therefore how through increasing the artificial wet land system interior carbon source, enhance system function, be worth very much exploring thereby improve nitric efficiency.
Summary of the invention
The objective of the invention is to be to provide a kind of method of supplementing composite vertical current constructed wetland carbon source; Do not influencing on the original function of wetland ventpipe and blow-down pipe; Utilize their transport pipes again, replenish outer carbon source to the wetland bottom, for anti-nitration reaction provides enough electron donors as supplementary carbon source; Improve wetland and carried out denitrifying environment, improved denitrification effect.This method is simple, and is easy to operate, can improve the nitric efficiency of composite vertical current wetland effectively, and this method can save the part carbon source and add pipeline, and economic benefit is obvious.
Another object of the present invention is the device that has been to provide a kind of supplementing composite vertical current constructed wetland carbon source method; Simple in structure, easy to use, this device can add to wetland inside with additional carbon; For wetland bottom anti-nitration reaction provides enough electron donors; Improve wetland and carried out denitrifying environment, improved denitrification effect, be superior to the device of supplementary carbon source in water inlet.And the blow-down pipe that this device has utilized existing ventpipe of composite vertical current artificial wetland and tube wall perforate has been saved most installation cost as the carbon source transport pipe.
To achieve these goals, the present invention adopts following technical measures:
A kind of method of supplementing composite vertical current constructed wetland carbon source the steps include:
A, the blow-down pipe of composite vertical current artificial wetland ventpipe with the tube wall perforate is connected with threeway; Form the carbon source transport pipe, filler is installed in the wetland, plant plant; One end that will connect flexible pipe then is enclosed within on the ventpipe that exposes the wet land filler top layer, and the other end links to each other with the water outlet of volume pump.
B, glucose (or other water-soluble organic carbon source: like starch, sucrose, fructose, ethanol, methyl alcohol, sodium acetate etc.) is dissolved with tap water in lixator fully.
C, the liquid carbon source among the A is pumped in the ventpipe on wetland top layer through volume pump; Liquid carbon source flow into downwards in the blow-down pipe of the tube wall perforate that links to each other with its bottom along ventpipe; Flow out through the aperture on the blow-down pipe tube wall of tube wall perforate again, enter into the wetland bottom, for wetland bottom anti-nitration reaction provides enough electron donors; Improved wetland and carried out denitrifying environment, significance has improved the denitrification effect of wetland to low-carbon high-nitrogen waste water.
Filler is installed is three kinds in hard coal, biological ceramic particle, zeolite in the described wetland, plant Canna generalis Bailey in the downstream wetland, plant calamus in up stream the pond in.
A kind of device of realizing the method for above-mentioned supplementing composite vertical current constructed wetland carbon source, it comprises the blow-down pipe of carbon source lixator, volume pump, connection flexible pipe, composite vertical current artificial wetland ventpipe, tube wall perforate.Function of each device with annexation is: volume pump respectively with the carbon source lixator, to be connected flexible pipe continuous; The composite vertical current artificial wetland ventpipe links to each other with the blow-down pipe that is connected flexible pipe, tube wall perforate respectively; The composite vertical current artificial wetland ventpipe is connected with threeway with the blow-down pipe of the tube wall perforate of wetland bottom; The blow-down pipe of tube wall perforate is positioned at the wetland bottom, and the blow-down pipe tube wall perforate aperture of tube wall perforate is 5～7mm, and pitch of holes is 150～200mm.
A, carbon source lixator: additional carbon generally is pulverous solid, need be introduced into the carbon source lixator and dissolve, and the present invention selects the quick lixator of band stirrer for use.
B, volume pump: to the sewage of different treatment amount and different C/N, the carbon source amount that is added in the wetland is all different, need accurately add, so the present invention adopts volume pump to carry out the carbon source regulation and control.
C, connect flexible pipe: be used for being connected of volume pump water outlet and composite vertical current artificial wetland ventpipe, function is the transport pipe as additional carbon.
D, composite vertical current artificial wetland ventpipe: ventpipe is to reach the standpipe on the wetland top layer from the wetland bottom, and original function is all gases (N that the inner microbial process of wetland is produced down
2, CO
2, CH
4Deng) output in the atmosphere, and can replenish wetland oxygen.In the present invention, the blow-down pipe of composite vertical current artificial wetland ventpipe with the tube wall perforate of wetland bottom is connected with threeway, forms a system, as the transport pipe of carbon source.
The blow-down pipe of E, tube wall perforate: the blow-down pipe of tube wall perforate is positioned at the wetland bottom, and original function is in order to get into empty bed stage or maintenance at wetland the time, drains the inner treating water of wetland.But at the wetland normal operating phase, blow-down pipe leaves unused, so in the present invention, the wetland blow-down pipe is fully utilized, and is used for being connected the back with ventpipe and carries additional carbon.Blow-down pipe tube wall perforate aperture is 5～7mm, and pitch of holes is 150～200mm.
Compare with the traditional method of supplementary carbon source in the wetland water inlet, beneficial effect of the present invention is embodied in:
1, carbon source compensation process provided by the invention directly utilizes distinctive ventpipe of composite vertical current artificial wetland and coupled bottom blow-down pipe as the carbon source transport pipe, has saved the part drug feeding pipeline, has saved installation cost.
2, the present invention adopts and adds carbon source to the wetland bottom, and as the wetland additional carbon, C/N only needs 4.3 just can improve the wetland denitrification effect greatly with glucose, is lower than in water inlet, to add the carbon source that needs, and has saved the carbon source cost.In an embodiment, water inlet nitric nitrogen concentration average is 28.8mgL
-1, COD
CrAverage is 110mgL
-1, hydraulic load is 0.85m
3(m
2D)
-1, hydraulic detention time is 20h, control group with add system's nitric nitrogen behind the 1.5g glucose and go out water concentration and be respectively 12.38mgL
-1, 7.98mgL
-1, the nitric nitrogen average removal rate is respectively 57.0%, 72.3%.Experimental result shows through supplementary carbon source, have been improved wetland and has carried out denitrifying environment for anti-nitration reaction provides enough electron donors to composite vertical current artificial wetland bottom, and wetland has significance to improve to the denitrification effect of low-carbon high-nitrogen waste water.The COD that contains in the water inlet
CrAdd the 1.5g glucose that adds, actual C/N ratio is merely 4.3: 1, far below in water inlet, adding the required C/N ratio of denitrification that carbon source is accomplished (6: 1～7: 1).Therefore the outstanding advantage of this supplementary carbon source method is that significance improves the wetland nitric efficiency, and practices thrift the additional carbon cost.
Description of drawings
Fig. 1 is a kind of plumbing installation synoptic diagram of method of supplementing composite vertical current constructed wetland carbon source.
Wherein, 1-carbon source lixator (the quick lixator of powder), 2-volume pump, 3-connect the blow-down pipe of flexible pipe, 4-composite vertical current artificial wetland ventpipe, the perforate of 5-tube wall.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation.
Method referring to a kind of supplementing composite vertical current constructed wetland carbon source of Fig. 1 the steps include:
A, according to Fig. 1; The blow-down pipe of composite vertical current artificial wetland ventpipe with the tube wall perforate is connected with threeway; Form the carbon source transport pipe, an end that will connect flexible pipe then is enclosed within on the ventpipe that exposes the wet land filler top layer, and the other end links to each other with the water outlet of volume pump.Filler is installed in the wetland, is planted plant.
B, the basis amount of disposing of sewage and wetland water inlet C/N; Calculate the wetland required carbon source amount that adds of disposing of sewage; After taking by weighing quantitative carbon source is put in the lixator, under agitation carbon source fully is dissolved in the tap water, every cover composite vertical current artificial wetland processing water yield is 60L/d among the embodiment; Replenish glucose 1.5g, be dissolved in the 500ml tap water.
C, before composite vertical current wetland water inlet; Rise to the liquid carbon source among the A in the ventpipe of composite vertical current wetland with volume pump; Liquid carbon source flows into downwards in the blow-down pipe of the tube wall perforate that links to each other with its bottom along ventpipe; Flow out the perforate from the blow-down pipe tube wall of tube wall perforate then, enter into the wetland bottom filling at last.
D, liquid carbon source are disposable be input to the wetland bottom after, pull out the connection flexible pipe on the ventpipe, the water inlet of beginning wetland, operation phase, recover the original function of wetland ventpipe.
A kind of device of realizing the method for above-mentioned supplementing composite vertical current constructed wetland carbon source, it comprises carbon source lixator 1, volume pump 2, connects the blow-down pipe 5 of flexible pipe 3, composite vertical current artificial wetland ventpipe 4, tube wall perforate.Function of each device with annexation is: volume pump 2 respectively with carbon source lixator 1, to be connected flexible pipe 3 continuous; Composite vertical current artificial wetland ventpipe 4 links to each other 5 with the blow-down pipe that is connected flexible pipe 3, tube wall perforate respectively; Composite vertical current artificial wetland ventpipe 4 is connected with the blow-down pipe 5 usefulness threeways of the tube wall perforate of wetland bottom; The blow-down pipe 5 of tube wall perforate is positioned at the wetland bottom, and the blow-down pipe 5 tube wall perforate apertures of tube wall perforate are 5～7mm, and pitch of holes is 150～200mm.
A, carbon source lixator 1: additional carbon generally is pulverous solid, need be introduced into the carbon source lixator and dissolve, and the present invention selects the quick lixator of band stirrer for use.
B, volume pump 2: to the sewage of different treatment amount and different C/N, the carbon source amount that is added in the wetland is all different, need accurately add, so the present invention adopts volume pump to carry out the carbon source regulation and control.
C, connect flexible pipe 3: be used for being connected of volume pump water outlet and composite vertical current artificial wetland ventpipe, function is the transport pipe as additional carbon.
D, composite vertical current artificial wetland ventpipe 4: ventpipe is to reach the standpipe on the wetland top layer from the wetland bottom, and original function is all gases (N that the inner microbial process of wetland is produced down
2, CO
2, CH
4Deng) output in the atmosphere, and can replenish wetland oxygen.In the present invention, the blow-down pipe 5 usefulness threeways of composite vertical current artificial wetland ventpipe 4 with the tube wall perforate of wetland bottom are connected, form a system, as the transport pipe of carbon source.
The blow-down pipe 5 of E, tube wall perforate: the blow-down pipe 5 of tube wall perforate is positioned at the wetland bottom, and original function is in order to get into empty bed stage or maintenance at wetland the time, drains the inner treating water of wetland.But at the wetland normal operating phase, blow-down pipe leaves unused, so in the present invention, the wetland blow-down pipe is fully utilized, and is used for being connected the back with ventpipe and carries additional carbon.The blow-down pipe 5 tube wall perforate apertures of tube wall perforate are 5～7mm, and pitch of holes is 150～200mm.The pipe diameter that is used is handled the water yield, carbon source dosage and design specifications according to wetland and is calculated decision, will not limit at this.
Its working process is in an embodiment:
(1) according to the method A of above-mentioned supplementing composite vertical current constructed wetland carbon source; Making up and handling the water yield is little lifetime measurement system two covers of composite vertical current artificial wetland of 60L/d; Wet land filler is made up of for three kinds hard coal, biological ceramic particle, zeolite; Plant Canna generalis Bailey in the downstream wetland, plantation calamus in the up stream pond.
(2) 1.5g glucose is dissolved in the 500ml tap water,, directly replaces lixator with beaker because the water yield is little.
(3) the 500ml D/W is directly poured into wherein in the ventpipe of the little lifetime measurement system of a cover, the 500ml tap water is poured in the other cover system as control group.
(4) beginning wetland water inlet, water inlet nitric nitrogen concentration average is 28.8mgL
-1, COD
CrAverage is 110mgL
-1, hydraulic load is 0.85m
3(m
2D)
-1, hydraulic detention time is 20h.
(5) get two cover wetland effluents and carry out water, control group with add system's nitric nitrogen behind the 1.5g glucose and go out water concentration and be respectively 12.38mgL
-1, 7.98mgL
-1, the nitric nitrogen average removal rate is respectively 57.0%, 72.3%.
Experimental result shows through supplementary carbon source, have been improved wetland and has carried out denitrifying environment for anti-nitration reaction provides enough electron donors to composite vertical current artificial wetland bottom, and wetland has significance to improve to the denitrification effect of low-carbon high-nitrogen waste water.In an embodiment, the COD that contains in the water inlet
CrAdd the 1.5g glucose that adds, actual C/N ratio is merely 4.3: 1, far below in water inlet, adding the required C/N ratio of denitrification that carbon source is accomplished (6: 1～7: 1).Therefore the outstanding advantage of this supplementary carbon source method is that significance improves the wetland nitric efficiency, and practices thrift the additional carbon cost.
Claims (3)
1. the method for a supplementing composite vertical current constructed wetland carbon source the steps include:
A, the blow-down pipe of composite vertical current artificial wetland ventpipe with the tube wall perforate is connected with threeway; Form the carbon source transport pipe, filler is installed in the wetland, plant plant; One end that will connect flexible pipe then is enclosed within on the ventpipe that exposes the wet land filler top layer, and the other end links to each other with the water outlet of volume pump;
B, glucose is dissolved with tap water in lixator;
C, the liquid carbon source among the B is pumped in the ventpipe on wetland top layer through volume pump; Liquid carbon source flow into downwards in the blow-down pipe of the tube wall perforate that links to each other with its bottom along ventpipe; Flow out through the aperture on the blow-down pipe tube wall of tube wall perforate again, enter into the wetland bottom;
Described composite vertical current artificial wetland is downstream-up stream composite vertical current artificial wetland.
2. device of realizing the described supplementing composite vertical current constructed wetland carbon source method of claim 1; It comprises carbon source lixator (1), volume pump (2), composite vertical current artificial wetland ventpipe (4); It is characterized in that: volume pump (2) respectively with carbon source lixator (1), be connected flexible pipe (3) and link to each other; Composite vertical current artificial wetland ventpipe (4) links to each other with the blow-down pipe (5) that is connected flexible pipe (3), tube wall perforate respectively; Composite vertical current artificial wetland ventpipe (4) is connected with threeway with the blow-down pipe (5) of the tube wall perforate of wetland bottom, and the blow-down pipe of tube wall perforate (5) is positioned at the wetland bottom.
3. the device of a kind of supplementing composite vertical current constructed wetland carbon source method according to claim 2 is characterized in that: the blow-down pipe of described tube wall perforate (5) tube wall perforate aperture is 5～7mm, and pitch of holes is 150～200mm.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092859A (en) * | 2010-12-09 | 2011-06-15 | 中国科学院水生生物研究所 | Vertical-flow artificial wetland composite matrix |
| CN102616938A (en) * | 2012-04-09 | 2012-08-01 | 复旦大学 | Method for improving pollutant purification effect of artificial wetland by controlling carbon/nitrogen (C/N) ratio of inlet water |
| CN102689989B (en) * | 2012-06-14 | 2013-12-11 | 中国科学院水生生物研究所 | Method and device for supplementing vertical flow constructed wetland solid carbon source |
| CN103274530B (en) * | 2013-06-19 | 2014-04-09 | 中国环境科学研究院 | Zonal vertical current artificial wetland system with reinforced denitrification function |
| CN103936161B (en) * | 2014-04-25 | 2015-09-30 | 暨南大学 | A kind of plant carbon source strengthened artificial wet land that utilizes is to the method and system of low-carbon high-nitrogen sewage denitrogenation |
| CN111153496A (en) * | 2020-01-20 | 2020-05-15 | 广东环境保护工程职业学院 | Aquaculture water planting fungus purifier |
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