CN1235814C - System and method for treating of sewage by combined artificial wet land - Google Patents
System and method for treating of sewage by combined artificial wet land Download PDFInfo
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- CN1235814C CN1235814C CNB031571611A CN03157161A CN1235814C CN 1235814 C CN1235814 C CN 1235814C CN B031571611 A CNB031571611 A CN B031571611A CN 03157161 A CN03157161 A CN 03157161A CN 1235814 C CN1235814 C CN 1235814C
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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
Abstract
The present invention discloses a system and a method for combined artificial wetland treatment for sewage. The system comprises a pretreatment unit and a combined wetland unit, wherein the combined wetland unit at least comprises a stage of vertical-current artificial wetland bed and a stage of horizontal-undercurrent flow type artificial wetland bed and can additionally comprise another stage of horizontal-undercurrent flow type artificial wetland bed which is arranged between the pretreatment unit and the vertical-current artificial wetland bed to form multiple-stage combination. The system is applied to the condition of large pollution load, and sewage is firstly treated by the pretreatment unit and then is primarily degraded by flowing into the vertical-current artificial wetland bed; the sewage finally flows into the horizontal-undercurrent flow type artificial wetland bed to further remove pollutants. The system and the method adopt the multi-stage wetland combination and integrates the advantages of two wetland kinds; therefore, the system and the method have the advantages of good nitrogen removing effect, high quality of treated water, relatively small occupation area and simple capital construction, and also effectively resolves the problem of sewage treatment in independent living districts which are far from urban drainage network management.
Description
Technical field
The present invention relates to a kind of sewage processing system and method, relate in particular to a kind of system and method for combinatorial artificial wetland processing of small-scale sanitary sewage, belong to field of environment engineering technology.
Background technology
Sanitary sewage is meant the sub-district of living on one's own life away from urban drainage pipe network on a small scale, mainly refers to the sanitary sewage on ground such as village, suburban villa.Though the sanitary sewage amount is few on a small scale, its distribution total amount is many, does not have practicable sewage treatment process.Present increasing along with the national environmental protection working dynamics, the enhancing of people's environmental consciousness, the processing of sanitary sewage becomes an important problem gradually on a small scale.
The artificial swamp utilization principle similar to natural ecosystems is that physics, chemistry and biological triple synergies realize the purification to sewage.It is the soil-plant-microorganism ecological environment of a uniqueness, and it has formed inner good circulation and has had favorable economic benefit and ecological benefits.Have that investment is low, running maintenance is simple, effluent quality good, increase greenery area, improve and beautify advantages such as ecotope, vision view excellence, especially be fit to the processing of sanitary sewage on a small scale.But it also has the big limitation of floor space, and is desirable not enough to the removal of nitrogen phosphorus.Chinese patent specification sheets CN1333190 discloses a kind of sewage water treatment method and device, this method principal character is that sewage at first passes through settling tank, enter a plug-flow bed then, it is wetland bed to enter a special descending-up stream again, enter a water quality at last and modify the pool, water outlet is modified once more.Though this method method than before is significantly improved, processing efficiency improves, and area reduces to some extent, but the wetland bed processing efficiency of pulling flow type is less than the vertical-flow wetland bed, so this plant area area is still bigger, be not suitable for the processing of sanitary sewage on a small scale.This device also is unfavorable for denitrogenation in addition, because the removal of nitrogen is to remove by the nitration reaction and the anti-nitration reaction in second step of the first step in the sewage, and this device be anti-nitration reaction preceding and nitration reaction after, the removal effect of nitrogen must reflux if obtain preferably, and the operation operation is just complicated like this.Descending-up stream wetland in this device still belongs to vertical-flow wetland in addition, and surperficial water distribution is multiplied mosquitos and flies easily, has a health and problem attractive in appearance.
Summary of the invention
The objective of the invention is to solve the not good and big problem of floor space of current artificial wet field facilities for treating sewage nitrogen removal effect, provide that a kind of capital construction working cost is cheap, pollutant removal good, water outlet can reach emission standard, the system and method that the combinatorial artificial wetland of a kind of sewage that floor space is relatively little is handled, and having overcome vertical-flow wetland surface water distribution influences sanitary condition and shortcoming attractive in appearance, has solved the dispersive handling problem of sanitary sewage on a small scale.
The objective of the invention is to be achieved through the following technical solutions:
The system that a kind of combinatorial artificial wetland of sewage is handled, comprising: comprise pretreatment unit and combination type wetland unit, described combination type wetland unit comprises one-level vertical current constructed wetland bed and one-level horizontal drowned flow flow pattern constructed wetland bed at least; The water-in of described pretreatment unit connects sewer line, and the water outlet of pretreatment unit connects the vertical current constructed wetland bed, and the water outlet of vertical current constructed wetland bed connects horizontal drowned flow flow pattern constructed wetland bed.
Described combination type wetland unit also comprises increases one-level horizontal drowned flow flow pattern constructed wetland bed, is provided with to be to constitute multistage combination between processing unit and the vertical current constructed wetland bed, is applied to the bigger situation of pollution load.
Described pretreatment unit is a hydrolytic tank or settling tank, also can be that a methane-generating pit is applied to system handles fecal sewage and the unseparated situation of sanitary sewage.
Thick gravel pebbles or the granular activated charcoal material of one deck 5cm laid on described vertical current constructed wetland bed surface, arranges water distributor down at it, avoided the generation of multiplying and reduced stink of mosquitos and flies.
Described each wetland bed end and inwall are all laid tar felt, are coated with waterproof layer then, prevent the effluent seepage polluted underground water.
The method that a kind of combinatorial artificial wetland of sewage is handled, sewage is at first handled through pretreatment unit, remove big particulate pollutant and suspended substance in the waste water, with the rejection to organics of the non-solubilised state in the raw waste water and be converted into the organism of solubilised state, prevent to stop up wet land system; Flow into the vertical current constructed wetland bed then, to organic pollutant degradation and carry out nitration reaction; Flow into horizontal drowned flow flow pattern constructed wetland bed at last, realize anti-nitration reaction and pollutent is further removed.
After sewage is handled through pretreatment unit, flow into a horizontal drowned flow flow pattern constructed wetland bed of an increase earlier, after tentatively degrading, flow into the vertical current constructed wetland bed again.
The present invention adopts multistage wetland combination, combine the advantage of two class wetland types, reach more satisfactory treatment effect, especially has good nitrogen removal effect, effluent quality is good, lay gravel pebbles or active carbon material on the wetland top layer, prevent sewage stop the surface and multiply mosquitos and flies and the sewage that dams in big impurity, guaranteed good sanitary condition; And floor space is less relatively, and capital construction is simple, and is simple to operate, efficiently solves the sewage handling problem away from the sub-district of living on one's own life of municipal drainage webmaster such as rural area, suburban villa.
Description of drawings
Fig. 1 is three grades of combinatorial artificial marsh sewage treatment system synoptic diagram;
Fig. 2 is the plane and the diagrammatic cross-section of the water inlet and the water outlet of vertical current constructed wetland.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail:
The combinatorial artificial marsh sewage treatment system that the present invention has adopted vertical current constructed wetland bed and horizontal drowned flow flow pattern constructed wetland bed to combine, concretely, carry out specific combination according to the characteristics of two kinds of dissimilar wetlands exactly, the advantage of comprehensive two class wetland types reaches more satisfactory combined effect.Specifically comprising a pretreatment unit, can be a hydrolytic tank or settling tank, also can be a methane-generating pit, is used for the unseparated situation of system handles fecal sewage and sanitary sewage.
Combination type wetland system can also can be for multistage for two-stage according to the character of sewage, during the two-stage combination vertical current flow pattern artificial swamp preceding, horizontal drowned flow flow pattern artificial swamp after; During multistage combination, can be before above-mentioned two-stage system, to add one-level horizontal drowned flow flow pattern artificial swamp again.Through pretreated sewage, if pollution load is bigger, at first by a horizontal drowned flow flow pattern artificial swamp, tentatively degrade, remove certain chemical oxygen demand COD, biochemical oxygen demand (BOD) BOD and a large amount of suspended solids, prevent to stop up the vertical current constructed wetland bed of next stage, pass through vertical current constructed wetland then, vertical current constructed wetland adopts the intermittent water inflow mode, can improve the transmittability of oxygen, has BOD preferably, COD removes ability and nitration reaction ability, and this stage mainly is an aerobic processes, and nitrogen-containing pollutant is converted into nitric nitrogen and nitrite nitrogen substantially by nitration reaction.Water outlet enters a horizontal drowned flow artificial wet land at last again, pollutent is further removed, this moment, the form of Continuous Flow was adopted in water inlet, the height of control rising pipe, make the wetland bed high-water state that is in of horizontal drowned flow that anaerobic environment is provided, in this stage, nitric nitrogen and nitrite nitrogen can be converted into nitrogen or nitrogen oxide effusion by anti-nitration reaction, and the system that makes has the removal effect of good nitrogen.If pollution load is smaller, can omit the horizontal drowned flow flow pattern artificial swamp of the first step, pretreated sewage directly enters vertical current constructed wetland.
Thick gravel pebbles or the granular activated charcoal material of one deck 5cm laid on the surface of vertical current constructed wetland bed, and then layout water distributor, avoided the generation of multiplying and reduced stink of mosquitos and flies, guarantee sanitary condition preferably, overcome the shortcoming that surperficial water distribution in the prior art is multiplied mosquitos and flies easily, influenced environment.
The embodiment of the multistage combination of the combinatorial artificial wet land treating system of sewage of the present invention as shown in Figure 1, as Fig. 1, native system comprises: pretreatment unit 1, horizontal drowned flow artificial wet land bed 2, vertical current constructed wetland bed 3, horizontal drowned flow artificial wet land bed 4; The sanitary sewage of process pretreatment unit 1 at first enters into a horizontal drowned flow artificial wet land bed 2 to carry out the preliminary degraded of organic pollutant and removes most suspended solid, the water distribution of horizontal drowned flow artificial wet land bed 2 and receipts water side have adopted gravel pebbles 5, it is provided with the gradient and is about 1%-2%, sewage runs to opposite side from the water distribution side in the mode of undercurrent, horizontal drowned flow artificial wet land has filtration characteristic preferably, remove the effective of suspended solid and bacterium, prevent the block vertical flow artificial swamp.Wetland bed 2 height is 80cm, medium wherein the end of to the top be that diameter is the cobble 10cm of 2-5cm successively, diameter is the coarse sand 30cm of 0.1-0.5cm, diameter is the fine sand 35cm of 0-0.1cm, wetland bed 2 long-width ratio was greater than 3: 1; Plant 11 can be planted between sandy soil, Scirpus tabernaemontani, Arundo donax can be chosen, acorus calamus variegatus Scirpus tabernaemontani etc. with ornamental value.The water outlet of horizontal drowned flow artificial wet land bed 2 is collected through rising pipe 6, adopt the mode intermittently vertical current constructed wetland bed 3 of batching then, the vertical current constructed wetland bed adopts water intake mode intermittently can improve the transmission rate of oxygen, ability with good removal chemical oxygen demand COD, biochemical oxygen demand (BOD) BOD, at this stage chemical oxygen demand COD, biochemical oxygen demand (BOD) BOD major part obtains removing, and ammonia nitrogen NH4-N obtains transforming substantially.
Wetland bed 3 is that surperficial water distribution vertically flows into a body, its concrete structure as shown in Figure 2, laying 5cm gravel pebbles or granular activated charcoal material 7 on the top layer can make sewage infiltrate a body fast, prevent sewage from stopping the surface and multiply mosquitos and flies and the sewage that dams in big impurity, and when hydraulic load increases, can also prevent erosion, guarantee good sanitary condition the bed surface; Water distribution system 8 is water pipes that the 0.5mm ostium excurrens is arranged at the top, guarantees that water inlet evenly; On rising pipe 9 pipes hole is arranged also,, go out the side that water collection pipe laterally is placed in water outlet for avoiding the short circuit of current.The concrete structure of vertical current constructed wetland bed 3 is highly to be 85cm; Medium wherein the end of to the top be that diameter is the cobble 10cm of 2-5cm successively, diameter is the coarse sand 30cm of 0.1-0.5cm, and diameter is the fine sand 35cm of 0-0.1cm, and diameter is the gravel pebbles 75cm of 1-2cm, sandy soil are built equally can plant ornamental type plant 11, beautifies the environment.Horizontal drowned flow artificial wet land bed 4 is delivered in water outlet at last, and denitrification process is further removed and finished to pollutent.
The structure of horizontal drowned flow artificial wet land bed 4 is with wetland bed 2, but the external flexible pipe 10 of its rising pipe, can up and downly regulate water level in the body according to different requirements.The water outlet that is in operation will keep the water level in the higher bed body, and anaerobic environment is provided, and realizes anti-nitration reaction.The water outlet of final level drowned flow artificial wet land bed 4 back up to standard discharging or reuse.
Above-mentioned each wetland bed end and inwall are all laid tar felt, are coated with waterproof layer then, prevent the effluent seepage polluted underground water.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1, the system of a kind of combinatorial artificial wetland of sewage processing, it is characterized in that: comprise pretreatment unit and combination type wetland unit, described combination type wetland unit comprises one-level vertical current constructed wetland bed and one-level horizontal drowned flow flow pattern constructed wetland bed at least; The water-in of described pretreatment unit connects sewer line, and the water outlet of pretreatment unit connects the vertical current constructed wetland bed, and the water outlet of vertical current constructed wetland bed connects horizontal drowned flow flow pattern constructed wetland bed.
2, the system of the combinatorial artificial wetland of sewage according to claim 1 processing, it is characterized in that: described combination type wetland unit also comprises increases one-level horizontal drowned flow flow pattern constructed wetland bed, be arranged between pretreatment unit and the vertical current constructed wetland bed, constitute multistage combination.
3, the system of the combinatorial artificial wetland of sewage according to claim 1 processing, it is characterized in that: described pretreatment unit is a hydrolytic tank or settling tank, or a methane-generating pit.
4, the system of the combinatorial artificial wetland of sewage according to claim 1 processing is characterized in that: thick gravel pebbles or the granular activated charcoal material of one deck 5cm laid on described vertical current constructed wetland bed surface, arranges water distributor down at it.
5, the system of the combinatorial artificial wetland of sewage according to claim 1 and 2 processing, it is characterized in that: described each wetland bed end and inwall are all laid tar felt, are coated with waterproof layer then.
6, the method handled of a kind of combinatorial artificial wetland of sewage, it is characterized in that: sewage is at first handled through pretreatment unit, flows into the vertical current constructed wetland bed then, degrades and carries out nitration reaction; Flow into horizontal drowned flow flow pattern constructed wetland bed at last, realize anti-nitration reaction and pollutent is further removed.
7, the method for the combinatorial artificial wetland of sewage according to claim 6 processing, it is characterized in that: after sewage is handled through pretreatment unit, flow into a horizontal drowned flow flow pattern constructed wetland bed of an increase earlier, after tentatively degrading, flow into the vertical current constructed wetland bed again.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031571611A CN1235814C (en) | 2003-09-16 | 2003-09-16 | System and method for treating of sewage by combined artificial wet land |
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| CNB031571611A CN1235814C (en) | 2003-09-16 | 2003-09-16 | System and method for treating of sewage by combined artificial wet land |
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| CN1235814C true CN1235814C (en) | 2006-01-11 |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337939C (en) * | 2005-03-29 | 2007-09-19 | 华南农业大学 | Method for treating home wastewater through artificial wetland combined vertical current with surface current |
| CN100415662C (en) * | 2005-04-28 | 2008-09-03 | 重庆大学 | System and process for sawage treating with baffling wet land filtering tank and rateral underflow wet land bed |
| CN100436344C (en) * | 2005-06-14 | 2008-11-26 | 青岛理工大学 | Two-segment type latent current wetland sewage treatment method |
| CN100400438C (en) * | 2005-09-21 | 2008-07-09 | 中国环境科学研究院 | Nutrient-rich river-lake water body and initial rainwater composite artificial wet land treating system |
| CN100551850C (en) * | 2006-04-29 | 2009-10-21 | 广州德润环保科技发展有限公司 | Composite ecological treatment method of sewage for artificial wet land and system thereof |
| CN100371269C (en) * | 2006-06-30 | 2008-02-27 | 南京大学 | Method and installation for treating domestic sewage by using artificial wetland |
| CN100418904C (en) * | 2006-07-03 | 2008-09-17 | 华南农业大学 | Vertical current and horizontal current integrated composite artificial wetland treatment method for treating urban sewage |
| CN101638264B (en) * | 2009-08-27 | 2011-04-06 | 同济大学 | Sponge anti-clogging strengthening compound flow constructed wetland domestic sewage treatment device |
| CN101693587B (en) * | 2009-10-21 | 2013-05-22 | 中国环境科学研究院 | Artificial wetland rural sewage courtyard type landscape treating device capable of denitrifying and dephosphorizing in regions |
| CN101781060B (en) * | 2010-03-02 | 2012-04-18 | 河北农业大学 | Composite artificial marsh sewage treatment system |
| CN102173511B (en) * | 2011-01-18 | 2012-11-28 | 上海交通大学 | Active-matrix-reinforced underflow constructed wetland device |
| CN102260021A (en) * | 2011-06-01 | 2011-11-30 | 同济大学 | Process and device for deep denitrogenation of domestic wastewater without additional carbon source |
| CN102603118A (en) * | 2012-03-12 | 2012-07-25 | 浙江省环境保护科学设计研究院 | Sewage treatment method based on blasting laminated artificial wetland |
| CN102642990B (en) * | 2012-04-28 | 2013-09-11 | 重庆大学 | Constructed wetland sewage treatment nitrous oxide discharging control system |
| CN104030440B (en) * | 2014-06-17 | 2016-02-17 | 哈尔滨工业大学 | A kind of multithread state strengthening composite under-current artificial wetland system and using method thereof |
| CN106698659A (en) * | 2017-01-24 | 2017-05-24 | 武汉理工大学 | Expressway service area sewage comprehensive treatment device |
| CN110642481B (en) * | 2019-11-04 | 2022-04-19 | 重庆交通大学 | Domestic sewage integrated treatment system suitable for villages and treatment method thereof |
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2003
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