CN103936161B - 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 - Google Patents
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 Download PDFInfo
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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
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Abstract
The invention discloses a kind of plant carbon source strengthened artificial wet land that utilizes to the method and system of low-carbon high-nitrogen sewage denitrogenation.Discarded farm crop or wetland plant stalk are hydrolyzed as carbon source by the present invention, are added by hydrolyzed solution to artificial swamp, improve the nitric efficiency of low-carbon high-nitrogen sewage.Invention also provides a kind for the treatment of system, structure is simple, and the mode adding carbon source is scientific and reasonable, realizes well utilizing plant carbon source strengthened artificial wet land to the effect of low-carbon high-nitrogen sewage denitrogenation.The plant carbon source that the inventive method adopts is cheap and easy to get, release carbon ability strong, biological denitrification denitrification effect is good, hydrolyzed solution is prepared simple and practical, and carbon addition method continuous service ability is strong, safeguard simple, secondary pollution is little, production cost is low, solves the technical barrier of artificial wetland treatment low carbon-nitrogen ratio sewage treatment plant tail water with simple method.
Description
Technical field
The present invention relates to technical field of sewage, be specifically related to a kind of plant carbon source strengthened artificial wet land that utilizes to the method and system of low-carbon high-nitrogen sewage denitrogenation, be applicable to the nitric efficiency improving low-carbon high-nitrogen polluted-water.
Background technology
The secondary that what current most of sewage work performed is in " urban wastewater treatment firm pollutant emission standard " or the emission standard of one-level B, reach the emission standard that one-level A is even higher, generally all need to carry out advanced treatment to sewage, this also will increase technical difficulty and the cost of sewage disposal greatly.Existing sewage work of China, particularly Shelter in South China Cities sewage treatment plant tail water height are nitrated and carbon source not enough, and C/N is lower, are difficult to carry out denitrogenation processing further.Low-carbon high-nitrogen polluted-water is directly discharged into the sensitive water body such as river, lake, will cause a series of serious water pollution problems, as body eutrophication etc.Utilize artificial swamp to carry out advanced treatment to sewage treatment plant tail water, water outlet reaches higher emission standard and has many research, but carbon source deficiency has become restriction artificial swamp to the key factor of above-mentioned polluted-water nitrogen removal performance.
For the present situation that above-mentioned artificial swamp is lower to the further nitric efficiency of sewage treatment plant tail water, add the denitrification denitrogenation effect that carbon source effectively can improve artificial swamp selectively.The method solved is more common in liquid make-up carbon source in water inlet, and as small molecule organic compounds such as methyl alcohol, formaldehyde, glucose and fructose, effectively can improve nitric efficiency, but these carbon sources can cause Wetland clogging, operation cost is high, or the problem such as secondary pollution is larger.Have research by direct for plant carbon source material landfill in the inner supplementary carbon source of wetland, but the rotten decomposition of plant needs for some time, and easily occur Wetland clogging problem and increase the problem such as hard-degraded substance, colourity increase in water outlet.Also have using vegetable material as the direct landfill of organic carbon source to improve the report of the nitric efficiency of artificial swamp, but the key issue that this technology runs in engineering is, the hydrolysis of vegetable material is first quick and back slow, cause accumulate in a large number the early stage being hydrolyzed release, and middle and later periods release slowly, stably carbon source be can not provide, thus nitric efficiency and effluent quality instability caused.Separately have the vitriol oil hydrolyzing plant material utilizing certain mass mark to be applied to the report of wetland again, but the hydrolyzed solution chemical composition that this technology obtains change, and pH value meta-acid, be not suitable for as artificial swamp microorganism utilizes.
The plant hydrolyzed liquid be hydrolyzed add natural condition in artificial swamp under is as denitrification organic carbon source, can avoid adding organic micromolecular drawback, also overcome the deficiency of direct landfill vegetable material as carbon source, add plant hydrolyzed liquid as denitrification organic carbon source improve artificial swamp to tail water nitric efficiency have safe and efficient, continue the advantages such as renewable and secondary pollution is less, have research plant hydrolyzed liquid such as Folium Cucumidis sativi and tomato hydrolyzed solution, Ipomoea batatas soak solution etc. to improve sewage water denitrification efficiency as denitrifying carbon source.But different plant hydrolyzed liquid compositions is different, effect of performance is different, the more important thing is that the difference of addition manner exists obvious difference to artificial swamp denitrification denitrogenation effect.
Summary of the invention
For the problem of existing artificial wetland treatment low-carbon high-nitrogen sewage denitrification denitrogenation poor effect, the invention provides a kind of plant carbon source strengthened artificial wet land that utilizes to the method for low-carbon high-nitrogen sewage denitrogenation, utilize discarded farm crop or wetland plant stalk, and in conjunction with the dosing method of science, play and improve artificial wetland treatment low-carbon high-nitrogen sewage denitrification denitrogenation effect.
Another object of the present invention is to provide the system realizing described method.
A further object of the invention is to provide described method or systematic difference.
Object of the present invention is achieved by the following technical programs:
There is provided a kind of plant carbon source strengthened artificial wet land that utilizes to the method for low-carbon high-nitrogen sewage denitrogenation, comprise the following steps:
S1. vegetable material soak solution is soaked hydrolysis and obtain hydrolyzed solution;
S2. S1 gained hydrolyzed solution is added to artificial swamp;
S3. add and discharge the low-molecular-weight organic matter that can be able to be utilized by denitrifying bacteria to the hydrolyzed solution decomposition of artificial swamp, strengthened artificial wet land is to low-carbon high-nitrogen sewage denitrogenation;
Wherein, vegetable material described in S1 is discarded farm crop or wetland plant stalk;
Soak solution described in S1 is water, and the mass volume ratio of described vegetable material and described soak solution, in g/mL, is 1:20 ~ 80;
Described in S1, hydrolysis is hydrolyzed into COD
crconcentration be 3000 ~ 4000 mg/L;
The interpolation volume of hydrolyzed solution described in S2, measures hydrolyzed solution COD before adding
crconcentration C, according to artificial swamp flooding quantity every day V
1and influent COD
crconcentration C
1with the concentration C of TN
2, according to required C/N ratio, calculate the interpolation volume V of hydrolyzed solution.Wherein hydrolyzed solution total nitrogen is ignored, and regulates and controls C/N ratio by under meter coutroi velocity.Under concrete calculating: C/N ratio=total COD:TN=(CV+C
1v
1): (C
2v
1).
Add described in S2 is add to artificial swamp middle level.
Preferably, vegetable material described in S1 is one or more mixture of giantreed, Canna generalis Bailey, cyperus alternifolius, bagasse or grass stalk.Vegetable material is discarded farm crop or wetland plant stalk, releases carbon ability strong, wide material sources, cheap and easy to get and be second stage employ.
If adopt multiple, the usage ratio of preferred various plants material is wait mass ratio.
Described vegetable material, through collecting, cleaning, dry, cut simple pre-treatment such as cutting, soaks hydrolysis with the solid-to-liquid ratio of science at normal temperatures and pressures, and hydrolysis is dipped to COD
crconcentration no longer change and reach stable, net filtration after filtration, collect filtrate, to obtain final product.Soak time is about 5 days.
The present invention is through experimental studies a large amount of for a long time, and summary obtains, and above-mentioned vegetable material is in massfraction, and content of cellulose is 27 ~ 35%, and hemicellulose level is 12 ~ 20%, and content of lignin is 20 ~ 28%, and soluble lignin content is between 8 ~ 13%.Adopt above-mentioned vegetable material, it is strong that it releases carbon ability, direct employing water is as soak solution, and under the suitable solid-liquid ratio condition of science, normal temperature and pressure conditions, realize hydrolysis, hydrolysis process requires simple, be applicable to practical application, the hydrolyzed solution prepared adds to artificial swamp, progressively decomposes under the effect of microorganism, discharges the low-molecular-weight organic matter that can be able to be utilized by denitrifying bacteria, remove the nitrogen in low carbon-nitrogen ratio sewage sustainedly and stably, greatly improve the nitric efficiency of wet land system.
Preferably, the mass volume ratio of vegetable material described in S1 and described soak solution, in g/mL, is 1:20.
Preferably, adding described in S2 is added to artificial swamp middle level with the form of drip irrigation by hydrolyzed solution.Hydrolyzed solution directly adds to artificial swamp middle level by the present invention's setting, avoids due to the decomposition and consumption dissolved oxygen of hydrolyzed solution and causes the suppression to nitration reaction.And the form of drip irrigation ensure that the persistence that carbon source provides and stability.
Preferably, described artificial swamp middle level is below artificial swamp surface 25 ~ 30cm.
The inventive method according to supplementary carbon source total amount and time length, can also control the supplementary flow velocity of carbon source with under meter, and stable constantly for system provides plant carbon source, after adding carbon source, system is run by original mode.
The present invention provides a kind of system realizing described method simultaneously, a kind of plant carbon source strengthened artificial wet land that utilizes is to the system of low-carbon high-nitrogen sewage denitrogenation, comprise carbon source adding set and artificial swamp, described carbon source adding set comprises hydrolyzed solution release pond, carbon source supplements supervisor and carbon source supplements arm, described carbon source is supplemented supervisor one end and is communicated with hydrolyzed solution release pond, the other end is placed in artificial swamp top layer, and described carbon source is supplemented arm one end and is communicated with the supplementary supervisor of carbon source, and the other end gos deep into artificial swamp middle level.
The present invention sets up independent hydrolyzed solution release pond at artificial swamp feed-water end, the power into water can be provided to realize effect of the present invention with gravitional force, not consume energy.
Preferably, described artificial swamp is several unit, and surface arranges carbon source and supplements supervisor, and described carbon source is supplemented the carbon source that supervisor is communicated with this unit respectively and supplemented arm.
One of alternatively, the carbon source that described artificial swamp cell surface is arranged is supplemented and is responsible for serial communication successively, and the first artificial wetland unit carbon source is supplemented supervisor one end and is communicated with hydrolyzed solution release pond.Preferably, described carbon source is supplemented between supervisor and is arranged under meter.Preferably, in system of the present invention, each artificial wetland unit area is 50m
2, during thickness 40 ~ 60cm, can arrange that 6 carbon sources supplement supervisor, often prop up carbon source supplementary supervisor connection 8 carbon sources and supplement arm.
Alternatively two, one end that the carbon source that described artificial swamp cell surface is arranged supplements supervisor is communicated with hydrolyzed solution release pond respectively, and the carbon source that the other end is communicated with this unit respectively supplements arm one end.Preferably, in system of the present invention, each artificial wetland unit area is 50m
2, during thickness 40 ~ 60cm, can arrange that 6 carbon sources supplement supervisor, often prop up carbon source supplementary supervisor connection 8 carbon sources and supplement arm.
Preferably, described carbon source supplements the pvc pipe of supervisor for being evenly arranged with certain spacing.Described spacing is preferably 50 ~ 60cm.
Preferably, described carbon source supplement arm be evenly drilled with aperture be 1 ~ 2mm give water hole.Replenisher supplements with the form of drip irrigation, be preferably evenly drilled with 1.5mm give water hole.
Preferably, it is pvc pipe that described carbon source supplements arm, length 30cm, and diameter is 2cm, be drilled with aperture be 1.5mm give water hole.Supplementary hydrolyzed solution is supplemented to wetland middle level, reduces to minimum to the suppression of nitrification.
Preferably, arrange filtering net before described hydrolyzed solution release pond water outlet, effectively prevent canebreak from entering wetland and cause blocking and mosquitos and flies to create disturbances to, discharging pond also can mounting cover further.
Described hydrolyzed solution release pond and carbon source arrange under meter, coutroi velocity between supplementing and being responsible for.
Preferably, described hydrolyzed solution release pond water exit position arranges filtering net.
Preferably, described hydrolyzed solution release pond and carbon source arrange under meter between supplementing and being responsible for.
The present invention provides the application of described method and system simultaneously, is specifically applied to and improves artificial swamp to the sanitary sewage of low-carbon high-nitrogen, surface water and/or treatment plant's tail water denitrogenation processing efficiency aspect.
The present invention has following beneficial effect:
It is not good that prior art utilizes Wastewater Treatment by Constructed Wetlands to realize denitrification effect, or complex process, is difficult to promote, or the material cost used is higher, and what have also needs use strong acid, not environmentally, also dangerous.The present invention sums up scientific and reasonable technical scheme, the farm crop that effective utilization is discarded or wetland plant stalk, adopt water as soak solution, prepare hydrolyzed solution, the dosing method of further employing science adds to artificial swamp, stable continue provide plant carbon source for system, the problem that the low-carbon high-nitrogen sewage denitrification denitrogenation efficiency that solution causes due to carbon source deficiency is not high, processing condition are gentle, simple, cost is lower, has important actual application value.The vegetable material economy that the present invention adopts is easy to get, and releases that carbon ability is strong and biological denitrification denitrification effect better, is beneficial to the second stage employ of waste plant straws; Plant carbon source hydrolyzed solution extracting method of the present invention is simple, and follow-up operation and maintenance management is simple; Plant hydrolyzed liquid of the present invention is that organic carbon source addition manner is stable convenient, with low cost, and persistence is strong, and running maintenance is simple, and secondary pollution is little.The present invention solves artificial swamp to the inefficient technical barrier of low-carbon high-nitrogen sewage denitrogenation processing with simple method, also solves the concrete technical problems such as the screening of vegetable material, the preparation of hydrolyzed solution, the adding set of carbon source and addition manner simultaneously.
Invention further provides the system realizing the inventive method, structure is simple, and application efficiency is high, and follow-up operation and maintenance management is simple, and addition manner is stable convenient, and persistence is strong, and running maintenance is simple, and secondary pollution is little.
Accompanying drawing explanation
One of Fig. 1 present system structural representation.
Fig. 2 present system structural representation two.
Fig. 3 present system structural representation three.
Embodiment
Further illustrate the present invention below in conjunction with the drawings and specific embodiments, unless stated otherwise, the material such as artificial swamp matrix, reagent that the present invention relates to is the material that this area routine uses.
Embodiment 1
The present embodiment provides a kind of plant carbon source strengthened artificial wet land that utilizes to the system of low-carbon high-nitrogen sewage denitrogenation, and primary structure is shown in shown in accompanying drawing 1, in accompanying drawing 1,1 is hydrolyzed solution release pond, and 2 to supplement for carbon source and are responsible for, and 3 supplement arm for carbon source, 4 is wetland plant, and 5 is matrix.
This artificial wet land system is positioned at region, Huizhou City, utilizes treatment scale to be 500 m
3the combined type artificial wetland of/d carries out advanced treatment to low-carbon high-nitrogen sewage treatment plant tail water.Treatment step is as follows:
S1. vegetable material soak solution is soaked hydrolysis and obtain hydrolyzed solution;
S2. S1 gained hydrolyzed solution is added to artificial swamp;
S3. add and discharge the low-molecular-weight organic matter that can be able to be utilized by denitrifying bacteria to the hydrolyzed solution decomposition of artificial swamp, strengthened artificial wet land is to low-carbon high-nitrogen sewage denitrogenation.
Particularly, collect giantreed, clean, dry, cut pre-treatment such as cutting, be placed in hydrolyzed solution release pond, the ratio being 1g:20mL according to the solid-to-liquid ratio of giantreed and water is soaked, giantreed hydrolysis under normal temperature and pressure.Be hydrolyzed into the 5th day, concentration no longer changes and reaches stable, and gained hydrolyzed solution concentration is at 3000 ~ 4000 mg/L.
Carbon source throwing device is arranged in artificial swamp, described carbon source adding set comprises hydrolyzed solution release pond 1, carbon source supplements supervisor 2 and carbon source supplements arm 3, described carbon source is supplemented supervisor 2 one end and is communicated with hydrolyzed solution release pond 1, the other end is placed in artificial swamp top layer, described carbon source is supplemented arm 3 one end connection carbon source and is supplemented supervisor 2, and the other end gos deep into artificial swamp middle level.Each cell layout 6 PVC carbon sources supplement supervisor.Often prop up supervisor's connection 8 carbon sources and supplement arm, each unit has arm 48.Arm is length 30 cm, is evenly drilled with the pvc pipe that aperture 1.5 mm is 2 cm to the diameter in water hole, extends to wetland middle level.Entering wetland for preventing canebreak causes blocking and mosquitos and flies to create disturbances to, and release pond is installed filter screen and adds a cover.
Hydrolyzed solution in hydrolyzed solution release pond, provides the power into water with gravitional force, and hydrolyzed solution release pond and carbon source are connected with under meter coutroi velocity between supplementing and being responsible for.The concentration C of hydrolyzed solution CODcr is measured, according to artificial swamp flooding quantity every day V before adding
1and the concentration C of influent COD cr
1with the concentration C of TN
2.According to required C/N ratio, calculate annex solution volume V.Wherein hydrolyzed solution total nitrogen is ignored, and regulates and controls C/N ratio by under meter coutroi velocity.Under concrete calculating: C/N ratio=total COD:TN=(CV+C
1v
1): (C
2v
1).According to supplementary carbon source total amount (V) and time length, control with under meter the flow velocity that carbon source supplements, stable continue provide plant carbon source for system, after adding carbon source, system is run by original mode.
Artificial swamp operation scheme adopt intermittent type enter sewage, the even cloth of water inlet pipe on artificial swamp top layer, 12 h of intaking, interval 12 h.Hydraulic load is by 1.0 m
3/ (m
2d) run.
Influent COD cr concentration is at about 20 mg/L, and CODcr concentration of intaking after supplementing hydrolyzed solution can reach 85.5 mg/L, and TN concentration is at 3.97 ~ 15.76 mg/L, NO
3-N 2.9 ~ 11.2 mg/L.
Experimental result shows, add plant hydrolyzed liquid and regulate C/N to be 8, run when hydraulic load is 1.0 m/d, each index all can reach good removal effect: TN clearance can up to 40 %, and elimination capacity is 1.92 g. (m
2.d)
-1, NO
3-N clearance can Da Keda 35 about %, and elimination capacity is 1.34 g. (m
2.d)
-1, ammonia nitrogen is lower due to influent concentration, almost can all remove, and after adding carbon source, water outlet CODcr is basically stable at about 10 mg/L, can not cause secondary pollution, significantly improve nitric efficiency.
Embodiment 2
The present embodiment provides a kind of plant carbon source strengthened artificial wet land that utilizes to the system of low-carbon high-nitrogen sewage denitrogenation, and primary structure is with embodiment 1.
This artificial wet land system is positioned at region, Huizhou City, utilizes treatment scale to be 500 m
3the combined type artificial wetland of/d is to low-carbon high-nitrogen, and the higher city river sewage of ammonia nitrogen concentration carries out advanced treatment.Treatment step is as follows:
S1. vegetable material soak solution is soaked hydrolysis and obtain hydrolyzed solution;
S2. S1 gained hydrolyzed solution is added to artificial swamp;
S3. add and discharge the low-molecular-weight organic matter that can be able to be utilized by denitrifying bacteria to the hydrolyzed solution decomposition of artificial swamp, strengthened artificial wet land is to low-carbon high-nitrogen sewage denitrogenation.
Particularly, collect Canna generalis Bailey and bagasse, be the ratio mixing of 1:1 in mass ratio, clean, dry, cut pre-treatment such as cutting, be placed in hydrolyzed solution release pond, the ratio being 1g:20mL according to Canna generalis Bailey and the quality of bagasse mixture and the solid-to-liquid ratio of water is soaked, Canna generalis Bailey and bagasse hydrolysis under normal temperature and pressure.Be hydrolyzed into the 5th day, concentration no longer changes and reaches stable, and gained hydrolyzed solution concentration is at 3000 ~ 4000 mg/L.
Carbon source throwing device is arranged in artificial swamp, described carbon source adding set comprises hydrolyzed solution release pond 1, carbon source supplements supervisor 2 and carbon source supplements arm 3, described carbon source is supplemented supervisor 2 one end and is communicated with hydrolyzed solution release pond 1, the other end is placed in artificial swamp top layer, described carbon source is supplemented arm 3 one end connection carbon source and is supplemented supervisor 2, and the other end gos deep into artificial swamp middle level.Each unit arranges that 6 PVC carbon sources supplement supervisor altogether.Often prop up supervisor's connection 8 carbon sources and supplement arm, each unit has arm 48.Arm is length 30 cm, is evenly drilled with the pvc pipe that aperture 1.5 mm is 2 cm to the diameter in water hole, extends to wetland middle level.Entering wetland for preventing canebreak causes blocking and mosquitos and flies to create disturbances to, and release pond is installed filter screen and adds a cover.
Hydrolyzed solution in hydrolyzed solution release pond, provides the power into water with gravitional force, and hydrolyzed solution release pond and carbon source are connected with under meter coutroi velocity between supplementing and being responsible for.The concentration C of hydrolyzed solution CODcr is measured, according to artificial swamp flooding quantity every day V before adding
1and the concentration C of influent COD cr
1with the concentration C of TN
2.According to required C/N ratio, calculate annex solution volume V.Wherein hydrolyzed solution total nitrogen is ignored, and regulates and controls C/N ratio by under meter coutroi velocity.Under concrete calculating: C/N ratio=total COD:TN=(CV+C
1v
1): (C
2v
1).According to supplementary carbon source total amount (V) and time length, control with under meter the flow velocity that carbon source supplements, stable continue provide plant carbon source for system, after adding carbon source, system is run by original mode.
Artificial swamp operation scheme adopt intermittent loading, the even cloth of water inlet pipe on artificial swamp top layer, 12 h of intaking, interval 12 h.Hydraulic load is by 1.0 m
3/ (m
2d) run.
Influent COD cr concentration is at about 17 mg/L, and CODcr concentration of intaking after supplementing hydrolyzed solution can reach 86.2 mg/L, and TN concentration is at 10 ~ 14 mg/L, NO
3 --N2.9 ~ 9 mg/L, NH
4 +-N 3 ~ 8 mg/L.
Experimental result shows, add plant hydrolyzed liquid and regulate C/N to be 8, run when hydraulic load is 1.0 m/d, each index all can reach good removal effect: TN clearance can up to 45 %, and elimination capacity is 2.25 m
3/ (m
2d), NH
4 +-N clearance can Da Keda 43 about %, and elimination capacity is 1.78 m
3/ (m
2d), NO
3 --N clearance can Da Keda 43 about %, and elimination capacity is 1.8 m
3/ (m
2d), after adding carbon source, water outlet CODcr is basically stable at about 10 mg/L, can not cause secondary pollution, significantly improve nitric efficiency.
Embodiment 3
Other are with embodiment 2, are 1:30 unlike solid-to-liquid ratio.
Artificial swamp operation scheme adopt intermittent loading, the even cloth of water inlet pipe on artificial swamp top layer, 12 h of intaking, interval 12 h.Hydraulic load is by 1.0 m
3/ (m
2d) run.
Influent COD cr concentration is at about 20 mg/L, and CODcr concentration of intaking after supplementing hydrolyzed solution can reach 65.5 mg/L, and TN concentration is at 10.2 ~ 14.8 mg/L, NO
3 --N2.9 ~ 9.2 mg/L, NH
4 +-N 3 ~ 8.1 mg/L.
Experimental result shows, now press example 2 controlled hydrolysis flow quantity, add plant hydrolyzed liquid and regulate C/N to be only about 6, run when hydraulic load is 1.0 m/d, each index all can reach good removal effect: TN clearance can up to 35 %, and elimination capacity is 1.8 m
3/ (m
2d), NH
4 +-N clearance can Da Keda 45 about %, and elimination capacity is 1.69 m
3/ (m
2d), NO
3 --N clearance can Da Keda 40 about %, and elimination capacity is 1.6 g. (m
2.d)
-1, after adding carbon source, water outlet CODcr is basically stable at about 10 mg/L, can not cause secondary pollution, significantly improve nitric efficiency.
Embodiment 4
Other are with embodiment 2, and unlike not establishing carbon source to supplement arm, supplement supervisor with 6 carbon sources and added and artificial swamp surface by hydrolyzed solution, hydrolyzed solution slowly infiltrates artificial swamp matrix voluntarily.
Artificial swamp operation scheme adopt intermittent loading, the even cloth of water inlet pipe on artificial swamp top layer, 12 h of intaking, interval 12 h.Hydraulic load is by 1.0 m
3/ (m
2d) run.
Influent COD cr concentration is at about 19 mg/L, and CODcr concentration of intaking after supplementing hydrolyzed solution can reach 87.2 mg/L, and TN concentration is at 10 ~ 14.6 mg/L, NO
3 --N 2.9 ~ 9.2 mg/L, NH
4 +-N 3.4 ~ 8.3 mg/L.
Experimental result shows, add plant hydrolyzed liquid and regulate C/N to be 8, run when hydraulic load is 1.0 m/d, each index all can reach good removal effect: TN clearance can up to 42 %, and elimination capacity is 2.1m
3/ (m
2d), NH
4 +-N clearance can Da Keda 28 about %, and elimination capacity is 1.12m
3/ (m
2d), NO
3 --N clearance can Da Keda 43 about %, and elimination capacity is 1.8 m
3/ (m
2d), after adding carbon source, water outlet CODcr is basically stable at about 10 mg/L, can not cause secondary pollution, significantly improve nitric efficiency.
Embodiment 5
Other are with embodiment 2, supplement supervisor unlike each cell layout 3 PVC carbon sources.Often prop up supervisor's connection 4 carbon sources and supplement arm, arm is length 30 cm, is evenly drilled with the pvc pipe that aperture 1.5 mm is 2 cm to the diameter in water hole, extends to wetland middle level.
Artificial swamp operation scheme adopt intermittent loading, the even cloth of water inlet pipe on artificial swamp top layer, 12 h of intaking, interval 12 h.Hydraulic load is by 1.0 m
3/ (m
2d) run.
Influent COD cr concentration is at about 20 mg/L, and CODcr concentration of intaking after supplementing hydrolyzed solution can reach 87.1 mg/L, and TN concentration is at 10 ~ 14.6 mg/L, NO
3 --N2.9 ~ 9.2 mg/L, NH
4 +-N 3.4 ~ 8.3 mg/L.
Experimental result shows, add plant hydrolyzed liquid and regulate C/N to be 8, run when hydraulic load is 1.0 m/d, each index all can reach good removal effect: TN clearance can up to 43 %, and elimination capacity is 2.14 m
3/ (m
2d), NH
4 +-N clearance can Da Keda 34 about %, and elimination capacity is 1.36 m
3/ (m
2d), NO
3 --N clearance can Da Keda 40 about %, and elimination capacity is 1.62 m
3/ (m
2d), after adding carbon source, water outlet CODcr is basically stable at about 11 mg/L, can not cause secondary pollution, significantly improve nitric efficiency.
Embodiment 6
The present embodiment provides a kind of plant carbon source strengthened artificial wet land that utilizes to the system of low-carbon high-nitrogen sewage denitrogenation, primary structure is shown in shown in accompanying drawing 2, in accompanying drawing 2,1 is hydrolyzed solution release pond, 2 is the supplementary supervisor of first module carbon source, 3 supplement arm for first module carbon source, and 4 is first module wetland plant, and 5 is first module matrix; 6 is that second unit carbon source supplements supervisor, and 7 supplement arm for second unit carbon source, and 8 is second unit wetland plant, and 9 is second unit matrix.
This artificial wet land system is positioned at territory, Community of Guangzhou City, utilizes treatment scale to be 500 m
3the combined type artificial wetland of/d carries out advanced treatment to low-carbon high-nitrogen sewage treatment plant tail water.Treatment step is as follows:
S1. vegetable material soak solution is soaked hydrolysis and obtain hydrolyzed solution;
S2. S1 gained hydrolyzed solution is added to artificial swamp;
S3. add and discharge the low-molecular-weight organic matter that can be able to be utilized by denitrifying bacteria to the hydrolyzed solution decomposition of artificial swamp, strengthened artificial wet land is to low-carbon high-nitrogen sewage denitrogenation.
Particularly, collect cyperus alternifolius, clean, dry, cut pre-treatment such as cutting, be placed in hydrolyzed solution release pond, the ratio being 1g:20mL according to the solid-to-liquid ratio of cyperus alternifolius and water is soaked, cyperus alternifolius hydrolysis under normal temperature and pressure.Be hydrolyzed into the 5th day, concentration no longer changes and reaches stable, and gained hydrolyzed solution concentration is at 3000 ~ 4000 mg/L.
Carbon source throwing device is arranged respectively in first module and second unit artificial swamp, described carbon source adding set comprises hydrolyzed solution release pond 1, first module carbon source supplements supervisor 2 and first module carbon source supplements arm 3, second unit carbon source supplements supervisor 6 and second unit carbon source supplements arm 7, and first module carbon source is supplemented supervisor 2 and is communicated with second unit carbon source and supplements supervisor 6.Described first module carbon source is supplemented supervisor 2 one end and is communicated with hydrolyzed solution release pond 1, the other end is placed in first module artificial swamp top layer, described first module carbon source is supplemented arm 3 one end connection first module carbon source and is supplemented supervisor 2, and the other end gos deep into first module artificial swamp middle level; Described second unit carbon source is supplemented supervisor 6 one end connection first module carbon source and is supplemented supervisor 2, the other end is placed in second unit artificial swamp top layer, described second unit carbon source is supplemented arm 7 one end connection second unit carbon source and is supplemented supervisor 6, and the other end gos deep into second unit artificial swamp middle level.Each cell layout 6 PVC carbon sources supplement supervisor.Often prop up supervisor's connection 8 carbon sources and supplement arm, each unit has arm 48.Arm is length 30 cm, is evenly drilled with the pvc pipe that aperture 1.5 mm is 2 cm to the diameter in water hole, extends to wetland middle level.Entering wetland for preventing canebreak causes blocking and mosquitos and flies to create disturbances to, and release pond is installed filter screen and adds a cover.
Hydrolyzed solution in hydrolyzed solution release pond, provides the power into water with gravitional force, and hydrolyzed solution release pond and carbon source are connected with under meter coutroi velocity between supplementing and being responsible for.The concentration C of hydrolyzed solution CODcr is measured, according to artificial swamp flooding quantity every day V before adding
1and the concentration C of influent COD cr
1with the concentration C of TN
2.According to required C/N ratio, calculate annex solution volume V.Wherein hydrolyzed solution total nitrogen is ignored, and regulates and controls C/N ratio by under meter coutroi velocity.Under concrete calculating: C/N ratio=total COD:TN=(CV+C
1v
1): (C
2v
1).According to supplementary carbon source total amount (V) and time length, control with under meter the flow velocity that carbon source supplements, stable continue provide plant carbon source for system, after adding carbon source, system is run by original mode.
Artificial swamp operation scheme adopt intermittent loading, the even cloth of water inlet pipe on artificial swamp top layer, 12 h of intaking, interval 12 h.Hydraulic load is by 1.0 m
3/ (m
2d) run.
Influent COD cr concentration is at about 16 mg/L, and CODcr concentration of intaking after supplementing hydrolyzed solution can reach 89.2 mg/L, and TN concentration is at 4.02 ~ 14.76 mg/L, NO
3 --N 3.1 ~ 12.2 mg/L.
Experimental result shows, add plant hydrolyzed liquid and regulate C/N to be 8, run when hydraulic load is 1.0 m/d, each index all can reach good removal effect: TN clearance can up to 47 %, and elimination capacity is 2.58 m
3/ (m
2d), NO
3 --N clearance can Da Keda 43 about %, and elimination capacity is 2.05 m
3/ (m
2d), ammonia nitrogen is lower due to influent concentration, almost can all remove, and after adding carbon source, water outlet CODcr is basically stable at about 12 mg/L, can not cause secondary pollution, significantly improve nitric efficiency.
Embodiment 7
The present embodiment provides a kind of plant carbon source strengthened artificial wet land that utilizes to the system of low-carbon high-nitrogen sewage denitrogenation, primary structure is shown in shown in accompanying drawing 3, in accompanying drawing 3,1 is hydrolyzed solution release pond, 2 is the supplementary supervisor of first module carbon source, 3 supplement arm for first module carbon source, and 4 is first module wetland plant, and 5 is first module matrix; 6 is that second unit carbon source supplements supervisor, and 7 supplement arm for second unit carbon source, and 8 is second unit wetland plant, and 9 is second unit matrix.
This artificial wet land system is positioned at region, Guangdong Province, utilizes treatment scale to be 500 m
3the combined type artificial wetland of/d carries out advanced treatment to low-carbon high-nitrogen sewage treatment plant tail water.Treatment step is as follows:
S1. vegetable material soak solution is soaked hydrolysis and obtain hydrolyzed solution;
S2. S1 gained hydrolyzed solution is added to artificial swamp;
S3. add and discharge the low-molecular-weight organic matter that can be able to be utilized by denitrifying bacteria to the hydrolyzed solution decomposition of artificial swamp, strengthened artificial wet land is to low-carbon high-nitrogen sewage denitrogenation.
Particularly, collect bagasse and grass stalk (mass ratio 1:1), clean, dry, cut pre-treatment such as cutting, be placed in hydrolyzed solution release pond, the ratio being 1g:20mL according to the solid-to-liquid ratio of cyperus alternifolius and water is soaked, bagasse and grass stalk hydrolysis under normal temperature and pressure.Be hydrolyzed into the 5th day, concentration no longer changes and reaches stable, and gained hydrolyzed solution concentration is at 3000 ~ 4000 mg/L.
Carbon source throwing device is arranged respectively in first module and second unit artificial swamp, described carbon source adding set comprises hydrolyzed solution release pond 1, first module carbon source supplements supervisor 2 and first module carbon source supplements arm 3, second unit carbon source supplements supervisor 6 and second unit carbon source supplements arm 7, first module carbon source is supplemented supervisor 2 and second unit carbon source and is supplemented supervisor 6 one end and be communicated with hydrolyzed solution release pond 1 respectively, the other end is placed in first module artificial swamp top layer and second unit artificial swamp top layer respectively, described first module carbon source is supplemented arm 3 one end connection first module carbon source and is supplemented supervisor 2, the other end gos deep into first module artificial swamp middle level, described second unit carbon source is supplemented supervisor 6 one end connection first module carbon source and is supplemented supervisor 2, the other end is placed in second unit artificial swamp top layer, described second unit carbon source is supplemented arm 7 one end connection second unit carbon source and is supplemented supervisor 6, and the other end gos deep into second unit artificial swamp middle level.Each cell layout 6 PVC carbon sources supplement supervisor.Often prop up supervisor's connection 8 carbon sources and supplement arm, each unit has arm 48.Arm is length 30 cm, is evenly drilled with the pvc pipe that aperture 1.5 mm is 2 cm to the diameter in water hole, extends to wetland middle level.Entering wetland for preventing canebreak causes blocking and mosquitos and flies to create disturbances to, and release pond is installed filter screen and adds a cover.
Hydrolyzed solution in hydrolyzed solution release pond, provides the power into water with gravitional force, and hydrolyzed solution release pond and carbon source are connected with under meter coutroi velocity between supplementing and being responsible for.The concentration C of hydrolyzed solution CODcr is measured, according to artificial swamp flooding quantity every day V before adding
1and the concentration C of influent COD cr
1with the concentration C of TN
2.According to required C/N ratio, calculate annex solution volume V.Wherein hydrolyzed solution total nitrogen is ignored, and regulates and controls C/N ratio by under meter coutroi velocity.Under concrete calculating: C/N ratio=total COD:TN=(CV+C
1v
1): (C
2v
1).According to supplementary carbon source total amount (V) and time length, control with under meter the flow velocity that carbon source supplements, stable continue provide plant carbon source for system, after adding carbon source, system is run by original mode.
Artificial swamp operation scheme adopt intermittent loading, the even cloth of water inlet pipe on artificial swamp top layer, 12 h of intaking, interval 12 h.Hydraulic load is by 1.0 m
3/ (m
2d) run.
Influent COD cr concentration is at about 20 mg/L, and CODcr concentration of intaking after supplementing hydrolyzed solution can reach 87.8 mg/L, and TN concentration is at 3.67 ~ 15.96 mg/L, NO
3 --N 2.4 ~ 12.2 mg/L.
Experimental result shows, add plant hydrolyzed liquid and regulate C/N to be 8, run when hydraulic load is 1.0 m/d, each index all can reach good removal effect: TN clearance can up to 42 %, and elimination capacity is 2.12 m
3/ (m
2d), NO
3 --N clearance can Da Keda 41 about %, and elimination capacity is 1.72 m
3/ (m
2d), ammonia nitrogen is lower due to influent concentration, almost can all remove, and after adding carbon source, water outlet CODcr is basically stable at about 10 mg/L, can not cause secondary pollution, significantly improve nitric efficiency.
Claims (6)
1. utilize plant carbon source strengthened artificial wet land to a method for low-carbon high-nitrogen sewage denitrogenation, it is characterized in that, comprise the following steps:
S1. vegetable material soak solution is soaked hydrolysis and obtain hydrolyzed solution;
S2. S1 gained hydrolyzed solution is added to artificial swamp;
S3. add and discharge the low-molecular-weight organic matter that can be able to be utilized by denitrifying bacteria to the hydrolyzed solution decomposition of artificial swamp, strengthened artificial wet land is to low-carbon high-nitrogen sewage denitrogenation;
Wherein, vegetable material described in S1 is one or more mixture of giantreed, cyperus alternifolius or bagasse; Soak solution described in S1 is water, and the mass volume ratio of described vegetable material and described soak solution, in g/mL, is 1:20;
Described in S1, hydrolysis is hydrolyzed into COD
crconcentration be 3000 ~ 4000 mg/L;
Adding described in S2 is add to artificial swamp middle level, and described artificial swamp middle level is below artificial swamp surface 25 ~ 30cm.
2. the application of method described in claim 1, is characterized in that, is applied to and improves artificial swamp to the sanitary sewage of low-carbon high-nitrogen, surface water and/or treatment plant's tail water denitrogenation processing efficiency aspect.
3. one kind realizes the system of method described in claim 1, it is characterized in that, comprise carbon source adding set and artificial swamp, described carbon source adding set comprises hydrolyzed solution release pond, carbon source supplements supervisor and carbon source supplements arm, described carbon source is supplemented supervisor one end and is communicated with hydrolyzed solution release pond, the other end is placed in artificial swamp top layer, and described carbon source is supplemented arm one end and is communicated with the supplementary supervisor of carbon source, and the other end gos deep into artificial swamp middle level; Described hydrolyzed solution release pond water exit position arranges filtering net; Described hydrolyzed solution release pond and carbon source arrange under meter between supplementing and being responsible for.
4. system according to claim 3, is characterized in that, described artificial swamp is several unit,
Surface arranges carbon source and supplements supervisor, and described carbon source is supplemented the carbon source that supervisor is communicated with this unit respectively and supplemented arm; The carbon source that described artificial swamp cell surface is arranged is supplemented and is responsible for serial communication successively, and the first artificial wetland unit carbon source is supplemented supervisor one end and is communicated with hydrolyzed solution release pond.
5. system according to claim 4, is characterized in that, each artificial wetland unit area is 50m
2, thickness 40 ~ 60cm, arranges that 6 carbon sources supplement supervisor, often props up carbon source supplementary supervisor connection 8 carbon sources and supplements arm; It is pvc pipe that described carbon source supplements arm, length 30cm, and diameter is 2cm, be drilled with aperture be 1.5mm give water hole.
6. system according to claim 3, is characterized in that, described artificial swamp is several unit,
Each artificial wetland unit surface arranges carbon source and supplements supervisor, and described carbon source is supplemented the carbon source that supervisor is communicated with this unit respectively and supplemented arm; One end that the carbon source that described artificial swamp cell surface is arranged supplements supervisor is communicated with hydrolyzed solution release pond respectively, and the carbon source that the other end is communicated with this unit respectively supplements arm one end.
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