CN103387291B - Blocking restrain method for constructed wetland - Google Patents
Blocking restrain method for constructed wetland Download PDFInfo
- Publication number
- CN103387291B CN103387291B CN201310291964.1A CN201310291964A CN103387291B CN 103387291 B CN103387291 B CN 103387291B CN 201310291964 A CN201310291964 A CN 201310291964A CN 103387291 B CN103387291 B CN 103387291B
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- China
- Prior art keywords
- wetland
- constructed wetland
- enzymatic hydrolysis
- blocking
- enzymolysis
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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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- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
A blocking restrain method for constructed wetland comprises following steps: adding beta-glucanase to have enzymatic hydrolysis reactions for 48 to 60 hours after the reactor starts, and controlling the enzymatic hydrolysis conditions as follows: the enzymatic hydrolysis temperature: 38 to 40 DEG C, the pH: 6.0 to 6.5, the enzyme usage amount: 0.8 mg/mL to 1.6 mg/mL, the auxiliary aeration intensity: 1.5 to 3 m<3>/(m<2>.d). The constructed wetland is vertical flow constructed wetland, subsurface constructed wetland or subsurface-vertical flow constructed wetland. The method adds beta-glucanase to have enzymatic hydrolysis reactions and performs aeration (the aeration intensity: 1.5 to 3 m<3>/(m<2>.d)) to assist the enzymatic hydrolysis reactions during the wetland operation process, so that extracellular polysaccharide is high effectively degraded to achieve the goal of restraining wetland blocking, the ecological environment and functions of the system is effectively maintained, and the method has good adaptability and practicality. The method not only can restrain the blocking, but also can maintain or even improve the processing efficiency of the pollutant of the system.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to a kind of efficient blocking method that presses down of artificial swamp, be applicable to that pollution load is high, organic and inorganic particle substrate concentration is higher etc. and easily cause the sewage disposal of Wetland clogging.
Background technology
Artificial swamp is a kind of sewage treatment ecological engineering new technology that 20 century 70s grow up.Owing to having the features such as low, the less energy consumption of investment, management are simple, artificial swamp is by extensive sanitary sewage and the pollution of area source processing that must be applied to vast Small Urban and grass roots, percolate dispose and lake pollution control in.
Long-term engineering practice shows, the artificial swamp of quovis modo all there will be latch up phenomenon in various degree after operation for some time.It on the process nature stopping up, is exactly the process that effective porosity reduces, the wherein anaerobic digestion product of the polysaccharose substance in artificial swamp colmatation zone and poly-urine class material, and be subject to low temperature limitation and the organic substance that is not degraded is the major cause that causes effective porosity to reduce, excessive obstruction can cause wetland fluid conductivity to reduce, and then the discharge capacity of wetland is declined, can cause the generation of wetland entirety anaerobic environment simultaneously, affect wherein microorganism eubolism activity, the decline of system treatment effect, operation life are shortened.Will effectively control obstruction, the starting point and key point are just to keep the effective porosity of Wetland Substrate.
The at present measure of reply Wetland clogging is mainly divided into three aspects: 1, physical measure: intermittent water inflow, stop bed dry, the periodic replacement wet land filler that falls; 2, chemical: apply and melt microbial inoculum (as clorox) or microbial inhibitor; 3, biological control measure: periodical reaping plant.
Mainly there is the deficiency of three aspects: in the current measure of taking:
One, above-mentioned physical measure all needs to interrupt over a period to come the normal operation of wetland, thereby affects overall processing efficiency, and the required fund of part measure and quantities larger, practical application is not strong;
Two, above-mentioned chemical, by killing and wounding or suppressing microorganism and suppress to stop up, has bad impact to wetland Interior habitat long-term stability, and the chemical-biological preparation of its input simultaneously exists the problem of water outlet secondary pollution, unpredictable on the impact of receiving water body;
Three, suppress to stop up effect unstable by the mode of periodical reaping plant, and required manually larger.
Summary of the invention
the technical problem solving:the object of the invention is to dispose for existing wetland the deficiency of choked technique, provide a kind of artificial swamp to press down blocking method, the method by carrying out the enzymolysis (adding beta-glucanase with water inlet) of for some time in artificial swamp operational process, add the beta-glucanase exocellular polysaccharide in Wetland Substrate of can degrading, improve the strainability of matrix, improve filtration velocity, avoid it to accumulate organic in the outer polymer of excessive born of the same parents and water inlet because of hostile environment condition, inorganic particulate matter forms high-moisture percentage, low-density gelinite, the effective porosity tying up between Wetland Substrate results in blockage.In adding beta-glucanase, carrying out artificial aeration assists and can in the different dissolved oxygen environment of creating suitable nitrated and denitrification respectively, strengthen collision and the friction between matrix granule, can promote so the abundant degraded of beta-glucanase to exocellular polysaccharide in Wetland Substrate, make larger the pressing down of beta-glucanase performance block up effect.
technical scheme:artificial swamp presses down blocking method, adds beta-glucanase and carry out enzymolysis after reactor operation, and enzymolysis time is 48-60 hour.
Described enzymatic hydrolysis condition is that temperature is 38-40 DEG C, and pH is 6.0-6.5.
The enzyme dosage of described enzymolysis is 0.8mg/mL-1.6mg/mL.
The auxiliary aeration rate of enzymolysis is 1.5-3 m
3/ (m
2.d).
Described artificial swamp is vertical current constructed wetland, drowned flow artificial wet land or compound flow constructed wetland.
beneficial effect:
1, the present invention carries out enzymolysis auxiliary aeration (aeration rate is 1.5-3 m by add beta-glucanase in wetland operational process
3/ (m
2.d)) process, the exocellular polysaccharide of can not only degrading efficiently reaches and suppresses the object of Wetland clogging, and ecotope and the function of keeping system effectively, therefore has good adaptability and practicality.
2, the present invention can also maintain and even improve the processing efficiency of system to pollutent in suppressing obstruction.
3, when being that 38-40 DEG C, pH add 0.8mg/mL-1.6mg/mL beta-glucanase under 6.0-6.5 condition in temperature, and to carry out aeration rate be 1.5-3 m
3/ (m
2.d), when aeration is assisted, it is best that the treatment effect to system and effective porosity and hydraulic detention time improve effect.
Embodiment
following examples further illustrate content of the present invention, but should not be construed as limitation of the present invention.Without departing from the spirit and substance of the case in the present invention, the amendment that the inventive method, step or condition are done and replacement, all belong to scope of the present invention.
if do not specialize, the conventional means that in embodiment, technique means used is well known to those skilled in the art.
embodiment 1
In the present embodiment, the water inlet hydraulic load of vertical current constructed wetland is 0.5m
3/ (m
2.d), enzymolysis time is 48-60 hour, and optimum enzymolysis condition is that temperature is that 38-40 DEG C, pH are 6.0-6.5, and best enzyme dosage is 0.8mg/mL-1.6mg/mL, and the auxiliary aeration rate of enzymolysis is 1.5-3 m
3/ (m
2.d).Measurement result COD clearance is 85%, and ammonia nitrogen removal frank is 80%, and nitrogen removal rate is 85%, and hydraulic detention time extends 15%, and effective porosity reduces 5%.Measurement result is as following table in detail.
Pollutent and main technical details contrast:
| Technical scheme | COD clearance (%) | NH 3-N clearance (%) | TN clearance (%) | Net porosity rate of fall-off (%) | Hydraulic detention time rate elongation (%) |
| Common artificial swamp | 60 | 35 | 34 | 20 | 50 |
| Enzymolysis artificial swamp | 85 | 80 | 85 | 5 | 15 |
embodiment 2
In the present embodiment, the water inlet hydraulic load of drowned flow artificial wet land is 0.5m
3/ (m
2.d), enzymolysis time is 48-60 hour, and optimum enzymolysis condition is that temperature is that 38-40 DEG C, pH are 6.0-6.5, and best enzyme dosage is 0.8mg/mL-1.6mg/mL, and the auxiliary aeration rate of enzymolysis is 1.5-3 m
3/ (m
2.d).Measurement result COD clearance is 80%, and ammonia nitrogen removal frank is 75%, and nitrogen removal rate is 80%, and hydraulic detention time extends 16%, and effective porosity reduces 8%.Measurement result is as following table in detail.
Pollutent and main technical details contrast
| Technical scheme | COD clearance (%) | NH 3-N clearance (%) | TN clearance (%) | Net porosity rate of fall-off (%) | Hydraulic detention time rate elongation (%) |
| Common artificial swamp | 60 | 35 | 34 | 20 | 50 |
| Enzymolysis artificial swamp | 80 | 75 | 80 | 8 | 16 |
embodiment 3
In the present embodiment, the water inlet hydraulic load of compound flow constructed wetland is 0.5m
3/ (m
2.d), enzymolysis time is 48-60 hour, and optimum enzymolysis condition is that temperature is that 38-40 DEG C, pH are 6.0-6.5, and best enzyme dosage is 0.8mg/mL-1.6mg/mL, and the auxiliary aeration rate of enzymolysis is 1.5-3 m
3/ (m
2.d).Measurement result COD clearance is 90%, and ammonia nitrogen removal frank is 80%, and nitrogen removal rate is 85%, and hydraulic detention time extends 10%, and effective porosity reduces 3%.Measurement result is as following table in detail.
Pollutent and main technical details contrast:
| Technical scheme | COD clearance (%) | NH 3-N clearance (%) | TN clearance (%) | Net porosity rate of fall-off (%) | Hydraulic detention time rate elongation (%) |
| Common artificial swamp | 65 | 40 | 36 | 15 | 40 |
| Enzymolysis artificial swamp | 90 | 80 | 85 | 3 | 10 |
The present invention suppresses the method for artificial swamp obstruction by add beta-glucanase auxiliary aeration in wetland.The method will add beta-glucanase and artificial aeration combines, by exocellular polysaccharide in beta-glucan enzyme liberating Wetland Substrate, improve the strainability of matrix, improve filtration velocity, and the microbubble producing by the aeration head being arranged in the middle part of matrix fully mixes with water inlet, in the different dissolved oxygen environment of creating suitable nitrated and denitrification respectively, strengthen collision and the friction between matrix granule, control with this low-density gelinite of high viscosity forming because of a large amount of accumulation of the outer polymer of extracellular microbial and tie up the latch up phenomenon that net pore space is caused.Present method is simple, in keeping even improving system processing efficiency, obstruction process has been carried out to effective control.
Claims (1)
1. artificial swamp presses down blocking method, it is characterized in that after reactor operation, adding beta-glucanase carries out enzymolysis, and the water inlet hydraulic load of compound flow constructed wetland is 0.5m
3/ (m
2.d), enzymolysis time is 48-60 hour, and optimum enzymolysis condition is that temperature is that 38-40 DEG C, pH are 6.0-6.5, and best enzyme dosage is 0.8mg/mL-1.6mg/mL, and the auxiliary aeration rate of enzymolysis is 1.5-3 m
3/ (m
2.d).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310291964.1A CN103387291B (en) | 2013-07-12 | 2013-07-12 | Blocking restrain method for constructed wetland |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310291964.1A CN103387291B (en) | 2013-07-12 | 2013-07-12 | Blocking restrain method for constructed wetland |
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| CN103387291A CN103387291A (en) | 2013-11-13 |
| CN103387291B true CN103387291B (en) | 2014-09-10 |
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ID=49531725
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| CN201310291964.1A Expired - Fee Related CN103387291B (en) | 2013-07-12 | 2013-07-12 | Blocking restrain method for constructed wetland |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104803483B (en) * | 2015-04-08 | 2017-05-03 | 河海大学 | Fluoride-containing wastewater treatment system based on constructed wetland assisted by aeration enzymolysis |
| CN105776550A (en) * | 2016-03-10 | 2016-07-20 | 中国科学院水生生物研究所 | Method for relieving blockage of constructed wetland |
| CN108101221B (en) * | 2017-12-27 | 2020-05-22 | 浙江大学 | Method for controlling and recovering constructed wetland filler biological blockage |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100486465C (en) * | 2005-01-10 | 2009-05-13 | 中国农业大学 | Method for recovering filtration rate of hyperfiltration membrane |
| JP2007160242A (en) * | 2005-12-15 | 2007-06-28 | Japan Organo Co Ltd | Ballast water preparation apparatus, ship equipped with it, and ballast water preparation method |
| JP2008109859A (en) * | 2006-10-27 | 2008-05-15 | Asahi Breweries Ltd | Filter-regenerating apparatus |
| CN100424022C (en) * | 2006-12-08 | 2008-10-08 | 华中科技大学 | Biological/enzymatic wet land sewage processing method |
| CN102078770B (en) * | 2010-12-02 | 2012-06-27 | 华南农业大学 | Solid compound enzyme for cleaning filtering membrane of draught beer |
| CN102435486A (en) * | 2011-09-01 | 2012-05-02 | 上海市环境科学研究院 | Method for classifying artificial wetland obstructions and extracting components of artificial wetland obstructions |
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Granted publication date: 20140910 Termination date: 20170712 |