CN102583764A - Combined packing multistage terrace type vertical flow constructed wetland sewage treatment method - Google Patents
Combined packing multistage terrace type vertical flow constructed wetland sewage treatment method Download PDFInfo
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- CN102583764A CN102583764A CN2012100683273A CN201210068327A CN102583764A CN 102583764 A CN102583764 A CN 102583764A CN 2012100683273 A CN2012100683273 A CN 2012100683273A CN 201210068327 A CN201210068327 A CN 201210068327A CN 102583764 A CN102583764 A CN 102583764A
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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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- 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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention belongs to the technical field of environmental protection and discloses a combined packing multistage terrace type vertical flow constructed wetland sewage treatment method, which comprises the following steps of: precipitating domestic sewage subjected to secondary biochemical treatment, and allowing the domestic sewage to enter a multistage terrace type vertical flow constructed wetland consisting of combined packing, so that water is purified. The method has the advantages of good treatment effect, high efficiency, high impact load resistance, stable operation, low investment cost and the like. Limits of pollutant discharge in the treated effluent reach the grade-A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002), wherein the chemical oxygen demand (COD) is less than 50mg/L, the ammonia nitrogen is less than 5mg/L, the total phosphorus is less than 0.5mg/L, and the total nitrogen is less than 15mg/L, so that the effluent can be directly discharged.
Description
Technical field
The invention belongs to environmental protection technical field, relate to the multistage terrace-type vertical current constructed wetland of a kind of combined stuffing sewage water treatment method.
Background technology
China agricultural samll cities and towns focus mostly in middle part and western mountainous areas and knob, belong to the economically less developed region, receive the restriction of the level of economic development, and they often are difficult to bear the great number construction operation of large-scale wastewater treatment plant and the expense of safeguarding.Because agriculture population in small towns scale is less, live and comparatively disperse, so sewage has discharging and disperse, characteristics such as water quality and water yield fluctuation are big.Existing agriculture samll cities and towns WWT mode is still mostly to be directly to enter river course nearby after the one-level septic tank dispersion treatment, and along with development of town economy, quantity of wastewater effluent continues to increase, and will cause severe contamination to receiving water body.China is the country on mountain more than, because the topographical condition and the local level of economic development, traditional large-scale centralized formula WWT mode can run into bigger difficulty.Therefore, suddenly wait to research and develop less energy-consumption sewage disposal technology of suiting measures to local conditions and practical sewage treatment process according to locality nature, economy and society condition.
Artificial swamp is as a kind of emerging ecological sewage treatment technology; More and more receive people's attention, this technology running maintenance is simple, and can tackle load impact preferably; Also can effectively remove organism, nitrogen, phosphorus in the sewage, be a kind of sewage water treatment method that has wide application prospects.Compare with conventional processes, the fabrication cost and the working cost of artificial swamp is lower, operational administrative is simple, treatment effect good.Through the apolegamy of wetland structure design, filler, plant, the adjusting of operation condition etc., can make water outlet reach " water environment quality standard " (GB3838-2002) I class to IV class standard, handle back water and can be used as landscape water and farmland irrigation water.Current patent of invention around the artificial swamp application has kind more than 300 approximately; Its type of skill can roughly be divided into following several types: center on the artificial wetland process that specific influent quality designs; This type of technology spininess is to the advanced treatment of trade effluent, like CN101254974 method of handling arsenic-containing waste water with the Herba pteridis vittatae artificial swamp; The optimization of the technology of artificial swamp; Generally comprise the optimization of artificial swamp element; Use new filler; Study the use of uniting of novel wetland plant or artificial swamp and other technologies, like one kind of CN101514053 with the eutrophication water body artificial wetland processing system of steel-making waste residue as matrix, CN101445300 eutrophic water low-energy consumption mobility bed-constructed wetland combination treatment method.But these inventions are many from process object or processing means, and ecological resources and the terrain feature with the locality do not take in.In addition, because the power that artificial swamp is disposed of sewage mainly comes from sun power, therefore numerous investigators often ignore energy consumption problem in the further reduction wetland technology.There are the big characteristics of topographical elevation difference in China agricultural samll cities and towns their location; Sometimes the topographical elevation difference of same samll cities and towns can reach tens meters even rice up to a hundred; If can make full use of this part potential energy and develop the novel artificial wetland device; Not only can reduce the energy consumption cost of WWT significantly, and can competent oxygen be provided, help improving the artificial wet land water quality purification efficiency for artificial swamp.
Summary of the invention
To defective of the prior art; The purpose of this invention is to provide the multistage terrace-type vertical current constructed wetland of a kind of combined stuffing sewage water treatment method, the limit value of handling pollutant emission in the water outlet of back reaches " urban wastewater treatment firm pollutant emission standard " one-level A standard in (GB18918-2002).
Technical scheme of the present invention is following:
The invention provides the multistage terrace-type vertical current constructed wetland of a kind of combined stuffing sewage water treatment method; This method may further comprise the steps: the sewage post precipitation after the secondary biochemical treatment; Get in the multistage terrace-type vertical current constructed wetland of combined stuffing formation; Stopped 2～5 days, water quality is purified.
Described multistage terrace-type vertical current constructed wetland long-width ratio is 1: 1.5-1: 3, have 4 grades of wetland device series operations, and the drop height is 400-800mm between every grade.
The employed combinations of plant of described multistage terrace-type vertical current constructed wetland is a first step wetland: reed; Second stage wetland: Canna generalis Bailey; Third stage wetland: Herba Bidentis Bipinnatae; Fourth stage wetland: calamus.
Described combined stuffing is a first step wetland: particle diameter is the big gravel of 15-18mm; Second stage wetland: particle diameter is the little gravel of 8-10mm; Third stage wetland: particle diameter be big gravel and the particle diameter of 15-18mm be 8-10mm little gravel mix gravel, big gravel and pebble stone volume ratio are 1: 1; Fourth stage wetland: particle diameter is that little gravel and the particle diameter of 8-10mm is the bamboo charcoal of 3mm, and both proportional ranges are 1: 1～1: 3.
Described combined stuffing layer thickness is 50～80cm.
Described first step wetland, second stage wetland, third stage wetland and fourth stage wetland are divided into inhalant region, wetland is handled main unit district, exhalant region; Current get into inhalant region through water inlet pipe, vertically enter into wetland through water distributor then and handle the main unit district, flow into exhalant region through the perforation rising pipe again.
Described sewage residence time in multistage terrace-type vertical current constructed wetland is 2～5 days.
The present invention compares with prior art, has the following advantages and beneficial effect:
1, construction cost of the present invention is low, can reduce investment outlay significantly, and operational management is convenient, and processing cost is low;
2, the present invention is according to the big characteristics of agriculture samll cities and towns' area topographical elevation difference; Develop multistage terrace-type vertical current constructed wetland; The practical waste disposal plant of this kind has the characteristics of low power energy-saving type; The series operation of 4 grades of constructed wetland devices simultaneously can increase substantially the purification efficiency of sewage, can extensively promote the use of in mountain area samll cities and towns.
3, the present invention develops the artificial swamp that novel cheap filler bamboo charcoal and different-grain diameter gravel based on the native country ecological resources be combined stuffing agriculture small town sewage is carried out advanced treatment; Both consider the wetland construction cost, given full play to the performance of each filler again; Bamboo charcoal has comparatively special pore texture, can strengthen organic absorption in the sewage is removed, and can good carrier be provided for adhering to of mikrobe again; Gravel has also guaranteed the removal effect to pollutents such as nitrogen, phosphorus as conventional filler.
4, the present invention optimizes the native country wetland plant Herba Bidentis Bipinnatae that pollutents such as nitrogen, phosphorus is had good removal effect in the foliage filter screening combined aspects, and the sewage purification ability of arranging in pairs or groups simultaneously is strong and have wetland plant reed, Canna generalis Bailey and the calamus of landscape effect concurrently; More than the combination of four kinds of wetland plants, can be when increasing the wet land system processing power dewing ground bring the landscape effect of grace.
5, method of the present invention have that treatment effect is good, efficient is high, capacity of resisting impact load is strong, stable, advantage such as investment cost is low.The limit value of handling pollutant emission in the water outlet of back reaches " urban wastewater treatment firm pollutant emission standard " one-level A standard in (GB18918-2002); Wherein COD is below 50mg/L, and ammonia nitrogen is below 5mg/L, and total phosphorus is below 0.5mg/L; Total nitrogen can directly discharge below 15mg/L.
Description of drawings
Fig. 1 is the synoptic diagram of the multistage terrace-type vertical current constructed wetland of the combined stuffing of the embodiment of the invention 1 sewage water treatment method.
Fig. 2 is a single-stage constructed wetland device schematic side view.
Fig. 3 is a single-stage constructed wetland device schematic top plan view.
Fig. 4 is the treatment effect figure of the multistage terrace-type vertical current constructed wetland of combined stuffing of the present invention to COD.
Fig. 5 is that the multistage terrace-type vertical current constructed wetland of combined stuffing of the present invention is to the treatment of ammonia nitrogen design sketch.
Fig. 6 is the treatment effect figure of the multistage terrace-type vertical current constructed wetland of combined stuffing of the present invention to total phosphorus.
Fig. 7 is the treatment effect figure of the multistage terrace-type vertical current constructed wetland of combined stuffing of the present invention to total nitrogen.
Embodiment
Below in conjunction with the accompanying drawing illustrated embodiment the present invention is further described.
Fig. 1 is the synoptic diagram of the multistage terrace-type vertical current constructed wetland of the combined stuffing of the embodiment of the invention 1 sewage water treatment method.Sewage post precipitation after the secondary biochemical treatment; Get in the multistage terrace-type vertical current constructed wetland of combined stuffing formation; Multistage terrace-type vertical current constructed wetland long-width ratio is all could in 1: 1.5,1: 2 and 1: 3; Have 4 grades of wetland device series operations, the drop height is that 400mm, 600mm or 800mm all can between every grade.Fig. 2 is a single-stage constructed wetland device side-view; Fig. 3 is a single-stage constructed wetland device vertical view.First step wetland, second stage wetland, third stage wetland and fourth stage wetland are of a size of 1m * 0.6m, and height 0.8m, first step wetland, second stage wetland, third stage wetland and fourth stage wetland are divided into inhalant region, wetland is handled main unit district, exhalant region; Current get into inhalant region through water inlet pipe 1, vertically enter into wetland through water distributor 2 then and handle the main unit district, flow into exhalant region through perforation rising pipe 3 again.
The series connection of level Four vertical-flow wetland is used.The employed combinations of plant of multistage terrace-type vertical current constructed wetland is reed, Canna generalis Bailey, Herba Bidentis Bipinnatae, four kinds of emergents of calamus, is planted in respectively in multistage terrace-type vertical current constructed wetland the 1st, 2,3,4 stage arrangements.The combined stuffing layer thickness is that 50cm, 60cm or 80cm all can.Aspect the filler layout, first step wetland arranges that particle diameter is the big gravel of 15-18mm, and second stage wetland arranges that particle diameter is the little gravel of 8-10mm, third stage wetland arrange particle diameter be big gravel and the particle diameter of 15-18mm be 8-10mm little gravel mix gravel; Big gravel and pebble stone volume ratio are 1: 1; Fourth stage wetland is that particle diameter is that little gravel and the particle diameter of 8-10mm is the mixing of the bamboo charcoal of 3mm, and both proportional ranges are 1: 1,1: 2 or 1: 3.It is dirty stifled that this kind array mode can either prevent, reduces head loss, can also utilize this part potential energy that has big drop between the wetland devices at different levels simultaneously, increases the filler space oxygenation, for root system of plant and mikrobe provide better growing environment.
Wetland is following to the purification process of sewage: at first through submersible pump agriculture small town sewage is evacuated to elevated tank, sewage is natural subsidence in water head tank, and excessive sewage returns hold well via overflow.Sewage in tank the residence time for 1-3 days through after the simple precipitation, make the sewage vertical subsurface flow get into multistage terraced fields artificial swamp through water distribution system, its flooding velocity is regulated flow rate control through pump.Effluent stream is through artificial swamps at different levels, and at the front end of combination type wetland, artificial swamp waits effect through filtering absorption, removes pollutents such as organism, SS; Remove pollutents such as nitrogen phosphorus in the stage casing through the aerobic-anaerobic reaction; At the material of tail end, suppress the effect of pathogenic bacterium in addition through plant root exudation.
The continuous water intake mode of 24h is adopted in the wetland operation, and intaking is agriculture small town sewage.Starting the operating period, water intaking power residence time 5d, hydraulic load is 0.96m
3/ (m
2D).In operational process, progressively increase hydraulic load according to the effluent quality situation, finally can make the hydraulic detention time of this artificial swamp reach 2d, hydraulic load is 2.4m
3/ (m
2D).Show that through the operation result of continuous 6 wheat harvesting periods this is that the multistage terrace-type vertical current constructed wetland of combined stuffing has good flexibility to sewage with bamboo charcoal and gravel, to COD, NH
4 +-N, TP, TN etc. have stable and removal effect preferably, and concrete treatment effect is seen Fig. 4, Fig. 5, Fig. 6, Fig. 7.Fig. 4 is the treatment effect figure of the multistage terrace-type vertical current constructed wetland of the present invention to COD.Fig. 5 is that the multistage terrace-type vertical current constructed wetland of the present invention is to NH
4 +The treatment effect figure of-N.Fig. 6 is the treatment effect figure of the multistage terrace-type vertical current constructed wetland of the present invention to total phosphorus.Fig. 7 is the treatment effect figure of the multistage terrace-type vertical current constructed wetland of the present invention to total nitrogen.During the steady running of more than four months, the COD mean concns is that 93.58mg/L, TN mean concns are that 19.64mg/L, TP mean concns are 1.55mg/L, NH in the water inlet
4 +-N concentration is 12.67mg/L; The limit value of pollutant emission reaches " urban wastewater treatment firm pollutant emission standard " one-level A standard in (GB18918-2002) in the water outlet, and wherein COD is below 50mg/L, and ammonia nitrogen is below 5mg/L; Total nitrogen is below 15mg/L, and total phosphorus is below 0.5mg/L.
The above-mentioned description to embodiment is can understand and use the present invention for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (7)
1. the multistage terrace-type vertical current constructed wetland of combined stuffing sewage water treatment method; It is characterized in that: this method may further comprise the steps: the sewage post precipitation after the secondary biochemical treatment; Get in the multistage terrace-type vertical current constructed wetland of combined stuffing formation, water quality is purified.
2. the multistage terrace-type vertical current constructed wetland of combined stuffing according to claim 1 sewage water treatment method; It is characterized in that: described multistage terrace-type vertical current constructed wetland long-width ratio is 1: 1.5～1: 3; Have 4 grades of wetland device series operations, the drop height is 400-800mm between every grade.
3. the multistage terrace-type vertical current constructed wetland of combined stuffing according to claim 1 sewage water treatment method is characterized in that: the employed combinations of plant of described multistage terrace-type vertical current constructed wetland is a first step wetland: reed; Second stage wetland: Canna generalis Bailey; Third stage wetland: Herba Bidentis Bipinnatae; Fourth stage wetland: calamus.
4. the multistage terrace-type vertical current constructed wetland of combined stuffing according to claim 1 sewage water treatment method, it is characterized in that: described combined stuffing is a first step wetland: particle diameter is the big gravel of 15-18mm; Second stage wetland: particle diameter is the little gravel of 8-10mm; Third stage wetland: particle diameter be big gravel and the particle diameter of 15-18mm be 8-10mm little gravel mix gravel, big gravel and pebble stone volume ratio are 1: 1; Fourth stage wetland: particle diameter is that little gravel and the particle diameter of 8-10mm is the bamboo charcoal of 3mm, and both proportional ranges are 1: 1～1: 3.
5. the multistage terrace-type vertical current constructed wetland of combined stuffing according to claim 4 sewage water treatment method, it is characterized in that: described combined stuffing layer thickness is 50～80cm.
6. according to claim 3 or the multistage terrace-type vertical current constructed wetland of 4 described combined stuffings sewage water treatment method, it is characterized in that: described first step wetland, second stage wetland, third stage wetland and fourth stage wetland are divided into inhalant region, wetland is handled main unit district, exhalant region; Current get into inhalant region through water inlet pipe (1), vertically enter into wetland through water distributor (2) then and handle the main unit district, flow into exhalant region through perforation rising pipe (3) again.
7. the multistage terrace-type vertical current constructed wetland of combined stuffing according to claim 1 sewage water treatment method is characterized in that: described sewage residence time in multistage terrace-type vertical current constructed wetland is 2～5 days.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887590A (en) * | 2012-11-09 | 2013-01-23 | 四川四通欧美环境工程有限公司 | Grading root zone sewage treatment ecological constructed wetland system |
| CN103351080A (en) * | 2013-07-02 | 2013-10-16 | 贵州师范大学 | Purification method for rural domestic sewage and stepped sewage percolation purification system |
| CN103359881A (en) * | 2013-07-24 | 2013-10-23 | 中国科学院亚热带农业生态研究所 | Method for reducing and controlling wastewater pollution of pig farm |
| CN112499881A (en) * | 2020-09-08 | 2021-03-16 | 桂林理工大学 | Wetland treatment method for domestic sewage in terrace region |
| CN114656037A (en) * | 2020-12-23 | 2022-06-24 | 广州怡境景观设计有限公司 | Terrace wetland rain sewage purification system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054237A (en) * | 2007-05-14 | 2007-10-17 | 华南农业大学 | Method of treating sewage by composite vertical down flow artificial wet field and treatment system thereof |
| US20090255862A1 (en) * | 2008-03-27 | 2009-10-15 | Mark Harrison | Eco-treament system |
| CN102030443A (en) * | 2009-09-25 | 2011-04-27 | 宁波大学 | Terrace type composite vertical flow forest wetland and domestic sewage treatment method thereof |
-
2012
- 2012-03-15 CN CN201210068327.3A patent/CN102583764B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054237A (en) * | 2007-05-14 | 2007-10-17 | 华南农业大学 | Method of treating sewage by composite vertical down flow artificial wet field and treatment system thereof |
| US20090255862A1 (en) * | 2008-03-27 | 2009-10-15 | Mark Harrison | Eco-treament system |
| CN102030443A (en) * | 2009-09-25 | 2011-04-27 | 宁波大学 | Terrace type composite vertical flow forest wetland and domestic sewage treatment method thereof |
Non-Patent Citations (6)
| Title |
|---|
| 《中国给水排水》 20110530 张姝等 花湖人工湿地对污水的净化效果研究 25－28页，第26页右栏第3段 1－7 第27卷, 第9期 * |
| 《杭州农业与科技》 20090228 郑洁敏等 不同人工湿地填料对水体中磷素吸附能力的研究 32－34页，32页右栏第1段 1－7 , 第2期 * |
| 《水资源保护》 20080131 詹鹏等 梯田式人工湿地处理生活污水的初步研究 27－30页，第28页左栏第2－4段，图1 1－7 第24卷, 第1期 * |
| 张姝等: "花湖人工湿地对污水的净化效果研究", 《中国给水排水》 * |
| 詹鹏等: "梯田式人工湿地处理生活污水的初步研究", 《水资源保护》 * |
| 郑洁敏等: "不同人工湿地填料对水体中磷素吸附能力的研究", 《杭州农业与科技》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887590A (en) * | 2012-11-09 | 2013-01-23 | 四川四通欧美环境工程有限公司 | Grading root zone sewage treatment ecological constructed wetland system |
| CN103351080A (en) * | 2013-07-02 | 2013-10-16 | 贵州师范大学 | Purification method for rural domestic sewage and stepped sewage percolation purification system |
| CN103359881A (en) * | 2013-07-24 | 2013-10-23 | 中国科学院亚热带农业生态研究所 | Method for reducing and controlling wastewater pollution of pig farm |
| CN103359881B (en) * | 2013-07-24 | 2014-12-17 | 中国科学院亚热带农业生态研究所 | Method for reducing and controlling wastewater pollution of pig farm |
| CN112499881A (en) * | 2020-09-08 | 2021-03-16 | 桂林理工大学 | Wetland treatment method for domestic sewage in terrace region |
| CN114656037A (en) * | 2020-12-23 | 2022-06-24 | 广州怡境景观设计有限公司 | Terrace wetland rain sewage purification system |
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