CN102001793B - Method and system for treating sewage of tidal flow and horizontal subsurface flow combined wetland - Google Patents
Method and system for treating sewage of tidal flow and horizontal subsurface flow combined wetland Download PDFInfo
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- CN102001793B CN102001793B CN2010105655957A CN201010565595A CN102001793B CN 102001793 B CN102001793 B CN 102001793B CN 2010105655957 A CN2010105655957 A CN 2010105655957A CN 201010565595 A CN201010565595 A CN 201010565595A CN 102001793 B CN102001793 B CN 102001793B
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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 relates to a method and a system for treating sewage of a tidal flow and horizontal subsurface flow combined wetland. The system comprises a water distribution system, a tidal flow artificial wetland nitrification system, a horizontal subsurface flow artificial wetland denitrification system and a time program controller. A sequencing batch type operating mode is adopted by the treatment system; the sewage is injected into a tidal flow artificial wetland to a specified water level by a water inlet pump in a specified time; an electric valve is opened after the specified time; the purified sewage of the tidal flow artificial wetland is collected to a middle collection barrel; the purified sewage is then injected into a horizontal subsurface flow artificial wetland through a perforated partition plate; and finally the purified sewage is discharged out of a water outlet. The invention has low treatment cost and good denitrification effect, the removal rate of chemical oxygen demand (COD) is 95.12 percent, the removal rate of NH4<+>-N is 72.73 percent, the removal rate of PO4<3>-P is 26.34 percent and the removal rate of TN is 60.67 percent, meanwhile the problem of artificial wetland substrate blockage is effectively solved and long-term stable operation of the system is guaranteed.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to the method and system that a kind of tide current and horizontal drowned flow combination type wetland are disposed of sewage.
Background technology
Along with China's urbanization, industriallization and economic fast development, water environment degradation, the water resources imbalance between supply and demand becomes increasingly conspicuous, and has seriously restricted comprehensive Sustainable development of China's economic society.Utilizing novel sewage disposal technology, strengthen waste water control and reuse, is to improve water surrounding, alleviates a kind of effective way that water resources lacks.Artificial swamp is to utilize soil-plant-action of microorganisms to realize a kind of ecological wastewater processing mode of pollutant removal.For other sewage treatment process; Artificial swamp have build and working cost cheap; Pollution substances such as nitrogen, phosphorus are removed advantages such as ability is strong, maintenance management is easy, anti impulsion load is strong, be widely used in the processing of Rural areas sewage, polluted surface water etc.
Yet because artificial swamp is the mimic natural ecosystems, receive weather effect bigger, especially in the winter time, low temperature and plant are withered etc., and problem is influence its further restrictive factor of popularization.The horizontal drowned flow artificial wet land that extensively adopts at present; Treatment sewage flows through from the wetland bottom; Matrix is in submerged condition for a long time; In the winter time under the coldcondition liquid level diffusion reoxygenation and root system of plant to secrete oxygen limited in one's ability, a body shows as anaerobic environment, is unfavorable for the decomposition of large amount of organic and the oxidation removal of ammonia nitrogen.And in the vertical current constructed wetland; When current flow with action of gravity unsaturation in matrix, can strengthen the oxygen diffusibility of wetland bed body, but its reoxygenation amount still can not satisfy large amount of organic oxygenolysis and the nitrobacteria demand to the ammonia oxidation removal; A large amount of undecomposed organic substances are gathered in stromal surface and cause a body to stop up; Thereby the change hydraulic detention time, and then change its hydraulic load, influence treatment effect.Tidal flow artificial wetland is the focus of recent research, and it is that wetland is full of water and drains by time sequence period property ground, thereby realizes and strengthen the removal of pollution substance, but because its reoxygenation ability is stronger, is unfavorable for the carrying out of denitrification process.
Present water body control is main with the removal of COD and ammonia nitrogen mainly; And a little less than the control relative thin to total nitrogen; Along with people's is to the needs of the raising gradually and the body eutrophication control of water requirement; The control of total nitrogen is extremely urgent, therefore demands researching and developing sewage water treatment method and the treatment system with efficient denitrification effect urgently.
Summary of the invention
The technical problem that the present invention solves at first be overcome existing single-stage tidal flow artificial wetland sewage water treatment method and the single-stage horizontal under-current artificial wetland sewage treatment method nitrated-the denitrification approach is not smooth, the problem that nitrogen removal rate is not high.
The technical scheme that the present invention proposes is the sewage water treatment method that a kind of processing cost is low, denitrification effect is good.Tidal flow artificial wetland can be assumed to be to the removal process of pollutent that absorption in early stage is held back and mikrobe oxygen consumption 2 stages of degraded in later stage.Tidal flow artificial wetland is under the waterflooding state; At first pollution substance is adsorbed in biofilm surface; In emptying, oxygen is sucked matrix pores then, the oxygen that is inhaled into matrix pores can be transferred to microbial film inside at short notice and offer nitrobacteria etc., promotes contaminant degradation; And then raising contaminant removal efficiency; The operation scheme of " tide current " has also promoted formation gradually stable, highdensity microbial film simultaneously, thereby realizes that tidal flow artificial wetland improves constantly the Pollutant Treatment effect, reduces the possibility that matrix is stopped up.Tidal flow artificial wetland is handled back sewage and is contained a large amount of nitrate salt, because the sewage that horizontal drowned flow artificial wet land is handled flows through from the wetland bottom, matrix is in submerged condition for a long time; The bed body shows as anaerobic environment; Therefore the stronger denitrifying capacity of horizontal drowned flow artificial wet land capable of using is strengthened " denitrification " function, thereby " nitrated-denitrification " approach of assurance is unimpeded; And then the raising of promotion nitrogen removal rate, improve wastewater purifying efficiency.
Another main points of the present invention provide tide current and the horizontal drowned flow combination type wetland treatment system that realizes aforesaid method.Said system is made up of water distribution system, tidal flow artificial wetland nitrification, horizontal drowned flow artificial wet land denilrification system and program timer, and treatment system adopts the sequence batch (operating method.
The present invention realizes through following technical measures:
At first; Intake pump injects tidal flow artificial wetland nitrification bed body to the specific water surface at the appointed time with sewage, behind specified time, opens motorized valve then, sewage collecting to the sewage middle part gathering barrel after the tidal flow artificial wetland nitrification is purified; Intake pump is injected into horizontal drowned flow artificial wet land denilrification system bed body again; Water inlet place of bed body is provided with the perforation dividing plate, guarantees water distribution uniformity, at last through the water outlet water outlet.The entire operation process is accomplished by time controller control.
The method and system that above-mentioned a kind of tide current and horizontal drowned flow combination type wetland are disposed of sewage is characterized in that: the tidal flow artificial wetland nitrification comprises a body, water distribution system and matrix.Water distribution system is lower than stromal surface, and the water surface is lower than stromal surface, and hydraulic load is 0.2-0.3m
3/ m
2/ d, operating temperature is 6～35 ℃.
The method and system that above-mentioned a kind of tide current and horizontal drowned flow combination type wetland are disposed of sewage; It is characterized in that: the tidal flow artificial wetland nitrification adopts for 3 cycles/operation scheme of d; Realize " water inlet-reaction-emptying-idle " circulation; Effectively promoted the purification of pollution substance and the reinforcement of nitrification function, reduce the bed body stop up maybe, be the working time of system: water inlet 10min, reaction 230min, emptying 3-5min, idle 235-237min.
The method and system that above-mentioned a kind of tide current and horizontal drowned flow combination type wetland are disposed of sewage is characterized in that: in tidal flow artificial wetland nitrification matrix, insert the porous PVC vertical tube, thereby strengthen the reoxygenation function of tidal flow artificial wetland system.
The method and system that above-mentioned a kind of tide current and horizontal drowned flow combination type wetland are disposed of sewage is characterized in that: the horizontal drowned flow artificial wet land denilrification system comprises a body, perforation water distribution board and matrix.The operation scheme of undercurrent helps realizing the operation of total system under coldcondition, and the perforation water distribution board helps water distribution uniformity.
The method and system that above-mentioned a kind of tide current and horizontal drowned flow combination type wetland are disposed of sewage is characterized in that: the wetland plant on the bed body of tidal flow artificial wetland nitrification, horizontal drowned flow artificial wet land denilrification system is one or several in Canna generalis Bailey, reed, the cattail.
The method and system that above-mentioned a kind of tide current and horizontal drowned flow combination type wetland are disposed of sewage; It is characterized in that: the matrix in the bed body of tidal flow artificial wetland nitrification, horizontal drowned flow artificial wet land denilrification system is one or several in gravel, zeolite, the haydite, and can carry out proportioning according to different-grain diameter.
Description of drawings
Accompanying drawing is a kind of tide current of the present invention and the horizontal drowned flow combination type wetland system construction drawing of disposing of sewage.
The former water gathering barrel of 1-, 2-intake pump, 3-PLC time controller, 4-water-in; 5-tidal flow artificial wetland bed body, 6-motorized valve, 7-sewage middle part gathering barrel, 8-horizontal drowned flow artificial wet land bed body; The 9-dividing plate of boring a hole, 10-water outlet, 11-porous PVC vertical tube; The 12-wetland plant, 13-wetland matrix, 14-level control valve.
Embodiment
Details are as follows: sewage is removed bigger inorganic particulate matter and suspended impurity in the sewage at former water gathering barrel (1) through action of gravity; Intake pump (2) injects tidal flow artificial wetland bed body (5) through water-in (4) at the appointed time with sewage, is placed with porous PVC vertical tube (11) in the bed body and strengthens reoxygenation usefulness.Physics, chemistry and biological triple synergy of the complex ecosystem that absorption and the mikrobe three of sewage through wetland plant (12) and wetland matrix (13) forms are purified processing; Motorized valve (6) is opened then, and the sewage after purifying is flow to sewage middle part gathering barrel (7) within a certain period of time.Through intake pump the sewage in the sewage middle part gathering barrel (7) is got into horizontal drowned flow artificial wet land bed body (8) again, water inlet place of bed body is provided with perforation dividing plate (9), guarantees water distribution uniformity.Sewage after will handling is at last discharged through water outlet (10), can be through control level control valve (14) to regulate wetland bed body elevation of water surface in actual moving process.The entire operation process is accomplished by time controller (3) control.
Embodiment 1:
Utilize above-mentioned embodiment to purify waste water.Wherein tidal flow artificial wetland bed body is Φ 30cm, the synthetic glass right cylinder of H80cm, and wherein packed height is 65cm, filling substrate gravel (the big gravel 15cm of bottom Φ 25-50mm, middle part Φ 8-12mm gravel 20cm, top Φ 3-5mm gravel 30cm) in it.Adopt for 3 cycles/operation scheme of d, the 10min of wherein intaking, reaction 230min, emptying 5min, idle 23min day handle water yield 12L; Horizontal drowned flow artificial wet land bed body is the synthetic glass body of D 40cm * L 50cm * H 30cm.In medial temperature is 9 ℃, on average intake COD 146.20-170.75mg/L, NH
4 +-N 33.12-41.93mg/L, PO
4 3--P is under the 4.28-5.11mg/L condition, and the pollutent of tidal flow artificial wetland is on average removed COD 74.09%, NH
4 +-N 36.70%, PO
4 3--P 20.96%, TN 6.13%; On average remove COD82.12%, NH through the horizontal drowned flow artificial wet land pollutent
4 +-N 52.73%, PO
4 3--P 31.80%, TN 34.13%.
Embodiment 2:
Utilize above-mentioned embodiment to purify waste water.Wherein tidal flow artificial wetland bed body is the synthetic glass right cylinder of Φ 30cm, H80cm, and wherein packed height is 65cm, filling substrate gravel (the big gravel 15cm of bottom Φ 25-50mm, middle part Φ 8-12mm gravel 20cm, top Φ 3-5mm gravel 30cm) in it.Adopt for 3 cycles/operation scheme of d, the 10min of wherein intaking, reaction 230min, emptying 5min, idle 23min day handle water yield 12L; Horizontal drowned flow artificial wet land bed body is the synthetic glass body of D 40cm * L 50cm * H 30cm.In medial temperature is 25 ℃, on average intake COD 105.65-179.03mg/L, NH
4 +-N 34.43-41.64mg/L, PO
4 3--P is under the 4.60-4.78mg/L condition, and the pollutent of tidal flow artificial wetland is on average removed COD 88.65%, NH
4 +-N 48.22%, PO
4 3--P 20.03%, TN 7.9%; On average remove COD95.12%, NH through the horizontal drowned flow artificial wet land pollutent
4 +-N 72.73%, PO
4 3--P 26.34%, TN 60.67%.
Claims (2)
1. the system that disposes of sewage of tide current and horizontal drowned flow combination type wetland; Said system comprises water distribution system, tidal flow artificial wetland nitrification, horizontal drowned flow artificial wet land denilrification system and program timer composition, and treatment system adopts the sequence batch (operating method; At first intake pump injects tidal flow artificial wetland nitrification bed body to the specific water surface at the appointed time with sewage; Motorized valve is opened behind specified time; Sewage collecting to sewage middle part gathering barrel with after the purification of tidal flow artificial wetland nitrification is injected into horizontal drowned flow artificial wet land denilrification system bed body through intake pump again, and water inlet place of bed body is provided with the perforation dividing plate; Guarantee water distribution uniformity, discharge through water outlet at last; The entire operation process is accomplished by time controller control;
Above-mentioned tidal flow artificial wetland nitrification comprises first body, water distribution system and first matrix; Water distribution system is lower than first stromal surface, and the water body liquid level is lower than first stromal surface, and hydraulic load is 0.2-0.3m
3/ m
2/ d, operating temperature is 6～35 ℃;
Above-mentioned horizontal drowned flow artificial wet land denilrification system comprises second body, perforation water distribution board and second matrix; The operation scheme of undercurrent helps realizing the operation of total system under coldcondition, and the perforation water distribution board helps water distribution uniformity;
Insert the porous PVC vertical tube in first matrix of above-mentioned tidal flow artificial wetland nitrification, thereby strengthen the oxygen enrichment function of tidal flow artificial wetland system;
Wetland plant on the bed body of above-mentioned tidal flow artificial wetland nitrification and horizontal drowned flow artificial wet land denilrification system is one or several in Canna generalis Bailey, reed, the cattail;
Matrix in the bed body of above-mentioned tidal flow artificial wetland nitrification and horizontal drowned flow artificial wet land denilrification system is one or several in gravel, zeolite, the haydite, and carries out proportioning according to different-grain diameter.
2. system according to claim 1; It is characterized in that: the tidal flow artificial wetland nitrification adopts for 3 cycles/operation scheme of d; Realize " water inlet-reaction-emptying-idle " circulation; Effectively promoted the purification of pollution substance and the reinforcement of nitrification function, reduced the probability that the bed body stops up, be the working time of system: water inlet 10min, reaction 230min, emptying 3-5min, idle 235-237min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105655957A CN102001793B (en) | 2010-11-30 | 2010-11-30 | Method and system for treating sewage of tidal flow and horizontal subsurface flow combined wetland |
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| CN2010105655957A CN102001793B (en) | 2010-11-30 | 2010-11-30 | Method and system for treating sewage of tidal flow and horizontal subsurface flow combined wetland |
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| CN102001793B true CN102001793B (en) | 2012-11-21 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102923860A (en) * | 2012-11-26 | 2013-02-13 | 中国农业大学 | Method for enhanced nitrogen removal of tidal flow-horizontal subsurface flow hybrid constructed wetland and system thereof |
| CN102942293B (en) * | 2012-12-06 | 2013-09-25 | 中国农业大学 | Tidal current wetland coupled electrochemical reinforced denitrification and dephosphorization method and system |
| CN103232138B (en) * | 2013-04-24 | 2014-04-16 | 中国农业大学 | Combined constructed wetland treatment method and system for nitrobenzene wastewater |
| CN103288220B (en) * | 2013-06-19 | 2014-06-11 | 中国环境科学研究院 | Shallow artificial wetland system for biozeolite strengthened nitrification |
| CN104150715B (en) * | 2014-08-20 | 2016-03-02 | 中国环境科学研究院 | Tidal flow artificial wetland and Efficiency for Soil Aquifer Treatment combined sewage water treatment unit and method |
| CN106007181A (en) * | 2016-06-23 | 2016-10-12 | 张锦宇 | Tidal mixed flow constructed wetland system and sewage treatment method |
| CN107215958B (en) * | 2017-07-24 | 2022-09-27 | 中国科学院水生生物研究所 | Application method and device of composite vertical tidal flow artificial wetland |
| CN109399808A (en) * | 2018-12-10 | 2019-03-01 | 云南大学 | A kind of bacteria filter device and application method of high-efficient purification sewage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050041A (en) * | 2006-04-03 | 2007-10-10 | 国家环境保护总局华南环境科学研究所 | Method for governing pollution of river surge |
| CN101575157A (en) * | 2009-06-12 | 2009-11-11 | 华南农业大学 | Method and system for treating sewage through composite tidal current artificial marsh |
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| CA2471048C (en) * | 2002-09-19 | 2006-04-25 | Suncor Energy Inc. | Bituminous froth hydrocarbon cyclone |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101050041A (en) * | 2006-04-03 | 2007-10-10 | 国家环境保护总局华南环境科学研究所 | Method for governing pollution of river surge |
| CN101575157A (en) * | 2009-06-12 | 2009-11-11 | 华南农业大学 | Method and system for treating sewage through composite tidal current artificial marsh |
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Granted publication date: 20121121 Termination date: 20181130 |