CN100417606C - Biological adsorption and artificial wetland combined town sewage treatment system and method - Google Patents
Biological adsorption and artificial wetland combined town sewage treatment system and method Download PDFInfo
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- CN100417606C CN100417606C CNB2006101440269A CN200610144026A CN100417606C CN 100417606 C CN100417606 C CN 100417606C CN B2006101440269 A CNB2006101440269 A CN B2006101440269A CN 200610144026 A CN200610144026 A CN 200610144026A CN 100417606 C CN100417606 C CN 100417606C
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- artificial swamp
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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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- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention relates to the cities sewage system and treating method which combines biological adsorbing and artificial wet land, and it belongs to city-government and environmental-protection domain. The system includes coarse and fine racks, sedimentation basin, and aerator and depositing tank of a stage in AB technology, underflow gallet beds artificial wet land and pipes connecting all devices. The method includes the following steps: removing the floating substances and fine sands through the coarse and fine racks, sendiment basin; removing the suspended particulate and organics, nitrogen and phosphorous through aerator of A stage; precipitating the floccular active sludge and organic suspended particulate through the depositing tank of A stage; the water entering the underflow gallet beds artificial wet land; contacting sterilizing to discharge the water. The invention has combined the biological adsorption and artificial wet land which can remove some organics in advance to increase the possibility of bio-treating the water so that it has solved many problems in wet land treating technology such as large occupying area, easy to be blocked and poor treatment efficiency in winter.
Description
Technical field:
The invention belongs to municipal administration and field of environmental engineering, be specifically related to the town sewage New Process for Treatment that a kind of biological absorption combines with artificial swamp.
Background technology
Artificial swamp originates from the seventies in 20th century, is one of development in recent years ecological wastewater processing technology rapidly.Artificial swamp is meant the ecosystem artificial design-build, simulating nature wetland structure and function, utilize the physics, chemistry of system's mesostroma-plant-microorganism, biological triple coordinative roles, realize efficient purification sewage by matrix filtration, absorption, precipitation, ion-exchange, plant absorbing and microbiological degradation.Characteristics such as treatment effect that artificial swamp is good and investment and working cost are low, operational administrative is simple and convenient make it obtain in the whole world using widely.
According to its water stream characteristics, artificial swamp can be divided into surface current wetland and current wetland two classes.Surface current wetland and natural wetland are similar, and sewage has advantages such as less investment, simplicity of design from wetland surface current mistake, but floor space is bigger, hydraulic load is too small, and the water surface exposed easily and froze winter, easily multiplies shortcoming such as mosquitos and flies summer it is seldom adopted in design.Current wetland does not have the free-water level of exposure, and sewage is seepage flow under filling surface, can overcome the shortcoming of above surface current.In actual applications, drowned flow artificial wet land occupies main status.The U.S. has 600 many places artificial wet land systems to be used for handling municipal administration, agricultural and trade effluent at present, most of undercurrent type system that adopts; In the underground undercurrent of the many employings system of some countries in Europe, the multiple wetland plants such as reed, calamus and cattail of planting of this type systematic adopt gravel to make filler; In addition, also obtained using widely in other national artificial swamp technology.
Though the application of artificial swamp is more extensive at present, but also exist weak point, it is bigger to be mainly reflected in floor space, stop up easily, particularly the dormancy phenomenon appears in wetland plant under cold condition, the root system microbial metabolism is slow, and the wetland processing efficiency is descended significantly, thereby has limited the promotion and application of artificial swamp technology.
AB method sewage treatment process is the abbreviation of absorption-biological degradation (Adsorption-Biodegration) technology.The AB method is made up of biological absorbing unit of A section and B section biological degradation unit.The biological absorbing unit of A section is made up of A section aeration tank and A section settling tank, and B section biological degradation unit is made up of B section aeration tank and secondary sedimentation basins.This method is not established preliminary sedimentation tank, make the A section have higher load, and can make full use of, utilize the stronger adsorptive power of mud through the preferred microbial population of water exhaust system, reach removal, alleviated the load of B section greatly holophytic nutrition materials such as some hardly degraded organic substance and nitrogen, phosphorus.Shortcomings such as but complete adsorption biodegradation sludge output is bigger, and B section biological degradation cell process is more have also limited its development.
Summary of the invention:
The objective of the invention is in order to overcome the weak point of above-mentioned artificial swamp technology in sewage disposal, the sewage water treatment method that a kind of biological absorption and artificial swamp combine is proposed, biological absorbing unit is set before artificial swamp, can remove a part of organism in advance, improve the biodegradability of sewage, thus solved effectively that the artificial swamp floor space more greatly, is easily stopped up and winter poor processing effect problem.
The town sewage treatment system that a kind of biological absorption that the present invention proposes and artificial swamp combine, it is characterized in that, this Sewage treatment systems comprises thickness grid and settling pit, the A section aeration tank and the A section settling tank of the biological absorbing unit of the A section of adsorption biodegradation, the undercurrent gravel bed artificial swamp, and the pipeline that is used to connect each equipment, its annexation is: thickness grid and settling pit are provided with sewage inlet and water outlet, the water outlet of thickness grid and settling pit links to each other with the water-in of A section aeration tank, the water outlet of A section aeration tank links to each other with the water-in of A section settling tank, the water outlet of A section settling tank links to each other with the water-in of undercurrent gravel bed artificial swamp, the sludge outlet that is arranged on this A section settling tank bottom links to each other with the mud import of A section aeration tank, and this sludge outlet links to each other with device for dehydrating sladge waste by pipeline simultaneously.
The sewage water treatment method of the employing said system that the present invention proposes is characterized in that this method may further comprise the steps:
1) pending sewage carries out pre-treatment through thickness grid and settling pit, removes floating matter and fine sand particle, to guarantee the normal operation of follow-up processing flow;
2) this water enters the A section aeration tank of the biological absorbing unit of A section of adsorption biodegradation then, removes suspended particle (SS) and organism (BOD) in this water, the while denitrogenation dephosphorizing;
3) this sewage continues the A section settling tank by the biological absorbing unit of A section of adsorption biodegradation, and (summer, A section aeration tank is aeration or a small amount of aeration not in order to save energy consumption to make cotton-shaped active sludge in this water and inorganic suspended particles precipitation; Winter, normal aeration was biological absorbing unit operation according to the A section of adsorption biodegradation in order to ensure running effect);
4) water outlet of this settling tank enters into the undercurrent gravel bed artificial swamp; The water outlet of artificial swamp is through qualified discharge behind the contact sterilizing.
Characteristics of the present invention and effect:
The biological absorbing process that the present invention adopts is the A section that adopts in conventional absorption-biological degradation (Adsorption-Biodegration is called for short AB) technology.Adopt biological absorbing process not establish preliminary sedimentation tank, under the situation of the residence time, utilize the stronger adsorptive power of active sludge to reach higher organic matter removal effect than weak point.Biological absorbing process has that load is high, mud age is short, bacterial reproduction speed is fast, sludge settling property good, capacity of resisting impact load is strong, stable, pH and toxic substance are had very big characteristics such as shock absorption.Sewage wherein non-solubility organism (comprising suspended matter and colloidalmaterial) after biological absorbing process is handled is removed in a large number, not only alleviated the operating load of subsequent technique greatly, greatly reduce the residence time of follow-up artificial wetland process, effectively reduced its floor space, biodegradability can also be improved.Especially in the winter of northern area, low temperature causes the artificial swamp treatment effect relatively poor, with biological absorbing process as pre-treatment after, can effectively improve processing efficiency.
Artificial swamp of the present invention is a undercurrent type gravel bed system artificial swamp, does not have the adding of soil can reduce possibility of jamming like this, and can improve the utilization ratio of oxygen.
The sewage treatment process that the present invention combines biology absorption and artificial swamp combines traditional activated sludge process with novel ecological wastewater processing technology, learn from other's strong points to offset one's weaknesses acting in conjunction.Biological absorbing unit is set before artificial swamp, can remove a part of BOD in advance, improve the biodegradability of sewage, thus solved effectively that the artificial swamp floor space more greatly, is easily stopped up and winter poor processing effect problem, be applied at present obtain good effect in the engineering.
Description of drawings
Fig. 1 is water treatment system structure of the present invention and treatment scheme synoptic diagram.
Embodiment
Below in conjunction with drawings and Examples content of the present invention is specifically described.
Town sewage treatment system and sewage water treatment method that a kind of biological absorption that the present invention proposes and artificial swamp combine, as shown in Figure 1, this Sewage treatment systems comprises thickness grid and settling pit, the A section aeration tank and the A section settling tank of the biological absorbing unit of the A section of adsorption biodegradation, the undercurrent gravel bed artificial swamp, and the pipeline that is used to connect each equipment, its annexation is: thickness grid and settling pit are provided with sewage inlet and water outlet, the water outlet of thickness grid and settling pit links to each other with the water-in of A section aeration tank, the water outlet of A section aeration tank links to each other with the water-in of A section settling tank, the water outlet of A section settling tank links to each other with the water-in of undercurrent gravel bed artificial swamp, the sludge outlet that is arranged on this A section settling tank bottom links to each other with the mud import of A section aeration tank, links to each other with device for dehydrating sladge waste by pipeline simultaneously.
In addition,, in A section aeration tank, be provided with the aerating apparatus that links to each other with the air blast machine room, and be provided with water contact sterilizing unit at the water outlet of artificial swamp for reaching better treatment effect.
The water treating equipment that each equipment in the said system all can adopt conventional ripening to produce
Utilize the water treatment method of this system may further comprise the steps:
1) pending sewage carries out pre-treatment through thickness grid and settling pit, removes floating matter and fine sand particle, to guarantee the normal operation of follow-up processing flow;
2) this water enters the A section aeration tank of the biological absorbing unit of A section of adsorption biodegradation then, removes suspended particle (SS) and organism (BOD) in this water, the while denitrogenation dephosphorizing;
3) this sewage continues the A section settling tank by the biological absorbing unit of A section of adsorption biodegradation, and (summer, A section aeration tank is aeration or a small amount of aeration not in order to save energy consumption to make cotton-shaped active sludge in this water and inorganic suspended particles precipitation; Winter, normal aeration was biological absorbing unit operation according to the A section of adsorption biodegradation in order to ensure running effect);
4) water outlet of this settling tank enters into the undercurrent gravel bed artificial swamp; The water outlet of artificial swamp is through qualified discharge behind the contact sterilizing.
The hydraulic detention time of above-mentioned A section aeration tank is 30min～50min, and sludge loading reaches 4.0kgBOD
5/ kgMLSSd～6.0kgBOD
5/ kgMLSSd, dissolved oxygen are 0.5mg/l～1.5mg/l; A section settling tank hydraulic surface loading is 1.1m
3/ m
2H～1.3m
3/ m
2H, hydraulic detention time are 1.4h～2.0h.
Above-mentioned steps 3) comprise also in that the sedimentary mud of a part that will produce is back to A section aeration tank, return sludge ratio is 50%～75%; Excess sludge is drained (but landfill or fertile as farming) after handling through belt thickening all-in-one.
Effective gravel bed system degree of depth of undercurrent type gravel bed system artificial swamp of the present invention is 0.8～1.0m, and hydraulic detention time is 1.0d～1.5d, and the water inlet volumetric loading is 0.07kgBOD
5/ m
2D～0.10kgBOD
5/ m
2D.
Embodiment 1
The sewage disposal scale of present embodiment is 2.0 ten thousand m
3/ d, intaking is the sanitary sewage in cities and towns.
The sewage water treatment method of present embodiment may further comprise the steps:
1) pending sewage at first carries out pre-treatment through thickness grid and settling pit, removes floating matter and fine sand particle (thickness grid and settling pit are the conventional equipment of water treatment) in this sewage;
2) this water enters the A section aeration tank of the biological absorbing unit of A section of adsorption biodegradation then, removes suspended particle (SS) and organism (BOD) in this water, the while denitrogenation dephosphorizing; The parameter that adopt the A section aeration tank of present embodiment is: hydraulic detention time 30min, sludge loading 6.0kgBOD
5/ kgMLSSd, dissolved oxygen are 0.5mg/l;
3) this sewage continues the A section settling tank by the A section of adsorption biodegradation, makes cotton-shaped active sludge and inorganic suspended particles precipitation in this water; Its hydraulic surface loading of A section settling tank of present embodiment is 1.3m
3/ m
2H, hydraulic detention time are 1.4h;
Comprise also that in step 3) the sedimentary mud of a part that will produce is back to A section aeration tank, return sludge ratio is 50%～75%; Excess sludge is drained after handling through belt thickening all-in-one, but landfill or fertile as farming;
4) water outlet of this settling tank enters into the undercurrent gravel bed artificial swamp; The water outlet of artificial swamp gets final product qualified discharge through contact sterilizing; The artificial swamp degree of depth of present embodiment is 1.0m, and hydraulic detention time is 1.5d, and the water inlet volumetric loading is 0.07kgBOD
5/ m
2D.
Behind this engineering operation, obtain good operating performance.A section aeration tank aeration not during summer is pressed the design variable operation winter.After testing, the water outlet in summer and winter all reaches the one-level B standard among " urban wastewater treatment firm pollutant emission standard " GB18918-2002.
Embodiment 2
The sewage disposal scale of present embodiment is 8000m
3/ d, intaking is sanitary sewage and trade effluent, trade effluent accounts for 20% of sewage total amount.
The sewage water treatment method of present embodiment may further comprise the steps:
1) pending sewage at first passes through thickness grid and settling pit, removes floating matter and fine sand particle in this sewage;
2) this water A section of entering adsorption biodegradation is the A section aeration tank of biological absorbing unit then, removes suspended particle (SS) and organism (BOD) in this water, and the parameter that adopt the A section aeration tank of present embodiment is: hydraulic detention time 40min, sludge loading 4.0kgBOD
5/ kgMLSSd, dissolved oxygen are 1.5mg/l;
3) sewage continues the A section settling tank by the A section of adsorption biodegradation, makes cotton-shaped active sludge and inorganic suspended particles precipitation in this water; Its hydraulic surface loading of A section settling tank of present embodiment is 1.1m
3/ m
2H, hydraulic detention time are 2.0h; Sludge handling process is identical with embodiment 1
4) water outlet of settling tank enters into the undercurrent gravel bed artificial swamp, and the water outlet of artificial swamp gets final product qualified discharge through contact sterilizing.The artificial swamp degree of depth of present embodiment is 0.8m, and hydraulic detention time is 1.2d, and the water inlet volumetric loading is 0.08kgBOD
5/ m
2D.
After this engineering debug operation, obtain good operating performance.Aeration rate is reduced in A section aeration tank during summer, presses the design variable operation winter.After testing, water outlet all reaches the one-level A standard among " urban wastewater treatment firm pollutant emission standard " GB18918-2002.
Embodiment 3
The sewage disposal scale is 6000m
3/ d, intaking is sanitary sewage.
The sewage water treatment method of present embodiment may further comprise the steps:
1) pending sewage at first carries out pre-treatment through thickness grid and settling pit, removes floating matter and fine sand particle in this sewage;
2) this water enters the A section aeration tank of the biological absorbing unit of A section of adsorption biodegradation then, removes suspended particle (SS) and organism (BOD) in this water, the while denitrogenation dephosphorizing; The design variable that adopt the A section aeration tank of present embodiment is hydraulic detention time 50min, sludge loading 4.5kgBOD
5/ kgMLSSd, dissolved oxygen are 1.2mg/l;
3) this sewage continues the A section settling tank by the A section of adsorption biodegradation, makes cotton-shaped active sludge and inorganic suspended particles precipitation in this water; The A section settling tank of present embodiment, its hydraulic surface loading is 1.3m
3/ m
2H, hydraulic detention time are 2.0h;
4) water outlet of this settling tank enters into the undercurrent gravel bed artificial swamp; The water outlet of artificial swamp gets final product qualified discharge through contact sterilizing; The artificial swamp degree of depth of present embodiment is 0.8m, and hydraulic detention time is 1.0d, and the water inlet volumetric loading is 0.10kgBOD
5/ m
2D; The water outlet of artificial swamp gets final product qualified discharge through contact sterilizing.Sludge handling process is identical with embodiment 1.
After this engineering debug operation, obtain good operating performance.After testing, water outlet all reaches the one-level A standard among " urban wastewater treatment firm pollutant emission standard " GB18918-2002.
Claims (7)
1. the town sewage treatment system that combines of biological absorption and artificial swamp, it is characterized in that, this Sewage treatment systems comprises thickness grid and settling pit, the A section aeration tank and the A section settling tank of the biological absorbing unit of the A section of adsorption biodegradation, the undercurrent gravel bed artificial swamp, and the pipeline that is used to connect each equipment, its annexation is: thickness grid and settling pit are provided with sewage inlet and water outlet, the water outlet of thickness grid and settling pit links to each other with the water-in of A section aeration tank, the water outlet of A section aeration tank links to each other with the water-in of A section settling tank, the water outlet of A section settling tank links to each other with the water-in of undercurrent gravel bed artificial swamp, the sludge outlet that is arranged on this A section settling tank bottom links to each other with the mud import of A section aeration tank, and this sludge outlet links to each other with device for dehydrating sladge waste by pipeline simultaneously.
2. town sewage treatment system as claimed in claim 1 is characterized in that, is provided with the aerating apparatus that links to each other with the air blast machine room in described A section aeration tank, and is provided with water contact sterilizing unit at the water outlet of artificial swamp.
3. sewage water treatment method that adopts town sewage treatment system as claimed in claim 1 is characterized in that this method may further comprise the steps:
1) pending sewage carries out pre-treatment through thickness grid and settling pit, removes floating matter and fine sand particle;
2) this water enters the A section aeration tank of the biological absorbing unit of A section of adsorption biodegradation then, removes suspended particle and organism in this water, simultaneously denitrogenation dephosphorizing;
3) this sewage continues the A section settling tank by the biological absorbing unit of A section of adsorption biodegradation, makes cotton-shaped active sludge and inorganic suspended particles precipitation in this water;
4) water outlet of this settling tank enters into the undercurrent gravel bed artificial swamp; The water outlet of artificial swamp is through qualified discharge behind the contact sterilizing.
4. method as claimed in claim 3 is characterized in that, the hydraulic detention time of described A section aeration tank is 30min～50min, and sludge loading reaches 4.0kgBOD
5/ kgMLSSd～6.0kgBOD
5/ kgMLSSd, dissolved oxygen are 0.5mg/l～1.5mg/l.
5. method as claimed in claim 3 is characterized in that, described A section settling tank hydraulic surface loading is 1.1m
3/ m
2H～1.3m
3/ m
2H, hydraulic detention time are 1.4h～2.0h.
6. method as claimed in claim 3 is characterized in that, also comprises the sedimentary mud of a part that will the produce full A section aeration tank of refluxing in the described step 3), and return sludge ratio is 50%～75%; Excess sludge is drained after handling through belt thickening all-in-one.
7. method as claimed in claim 3 is characterized in that, effective gravel bed system degree of depth of described undercurrent type gravel bed system artificial swamp is 0.8m～1.0m, and hydraulic detention time is 1.0d～1.5d, and the water inlet volumetric loading is 0.07kgBOD
5/ m
2D～0.10kgBOD
5/ m
2D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101440269A CN100417606C (en) | 2006-11-24 | 2006-11-24 | Biological adsorption and artificial wetland combined town sewage treatment system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101440269A CN100417606C (en) | 2006-11-24 | 2006-11-24 | Biological adsorption and artificial wetland combined town sewage treatment system and method |
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| Publication Number | Publication Date |
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| CN1966424A CN1966424A (en) | 2007-05-23 |
| CN100417606C true CN100417606C (en) | 2008-09-10 |
Family
ID=38075442
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|---|---|---|---|
| CNB2006101440269A Expired - Fee Related CN100417606C (en) | 2006-11-24 | 2006-11-24 | Biological adsorption and artificial wetland combined town sewage treatment system and method |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100398466C (en) * | 2007-07-20 | 2008-07-02 | 北京市水利科学研究所 | North low-temperature area undercurrent artificial wetland winter operation method |
| JP5443059B2 (en) * | 2009-05-29 | 2014-03-19 | 株式会社東芝 | Water treatment equipment |
| CN102603116B (en) * | 2012-03-07 | 2013-07-24 | 光大环保科技发展（北京）有限公司 | Distribution treatment combination technological method for domestic sewage of small-sized towns |
| CN106045208A (en) * | 2016-07-12 | 2016-10-26 | 佛山杰致信息科技有限公司 | Domestic sewage treatment method |
| CN108147624A (en) * | 2018-01-25 | 2018-06-12 | 南昌工程学院 | A kind of processing method of country sewage |
| CN108483827B (en) * | 2018-06-15 | 2023-10-27 | 王一然 | Treatment and purification system for urban rain water channel main channel effluent |
| CN109179907B (en) * | 2018-10-27 | 2023-09-26 | 河北雄安德荫源环境科技有限公司 | Domestic sewage ecological treatment system for summer |
| CN109354206A (en) * | 2018-12-10 | 2019-02-19 | 佛山科学技术学院 | A kind of method of Sewage treatment in constructed wetland |
| CN112811734A (en) * | 2021-01-14 | 2021-05-18 | 山东大学 | Biological-ecological coupling sewage treatment device and method |
| CN113845233A (en) * | 2021-11-04 | 2021-12-28 | 盐城师范学院 | Adjustable anti-blocking wetland system |
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