CN100415662C - System and process for sawage treating with baffling wet land filtering tank and rateral underflow wet land bed - Google Patents
System and process for sawage treating with baffling wet land filtering tank and rateral underflow wet land bed Download PDFInfo
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- CN100415662C CN100415662C CNB2005100570472A CN200510057047A CN100415662C CN 100415662 C CN100415662 C CN 100415662C CN B2005100570472 A CNB2005100570472 A CN B2005100570472A CN 200510057047 A CN200510057047 A CN 200510057047A CN 100415662 C CN100415662 C CN 100415662C
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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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Abstract
The present invention relates to a sewage treatment system combining deflection wetland filtering ponds with lateral undercurrent wetland beds and a method thereof. The system is formed by sequentially connecting a pretreatment structure, a deflection type wetland filtering pond set and a lateral undercurrent wetland bed set by a water way in a gradient downward mode, wherein at least one vertical flow blocking wall is arranged in each filtering pond of the deflection type wetland filtering pond set. Water flow passes through the filtering ponds in the flowing state of up-down deflection, and haydite or zeolite stuffing is filled in the filtering ponds on which aquatic plants are planted. The lateral undercurrent wetland bed set is composed of multiple stages of lateral undercurrent wetland beds, natural reoxygenation areas and a compatible-oxygen stabilization pond, wherein water in each lateral undercurrent wetland bed horizontally flows in an S shape, and an upper stage of wetland bed is connected with a lower stage of wetland bed by the natural reoxygenation areas to carry out multiple stages of aerobic-anoxic-aerobic circulating biological reactions for sewage. The system has the advantages of high utilization rate of pond volume, small ground occupation area, good treatment effect of the method and long-term maintenance; therefore, the sewage treatment system is especially suitable for treating town sewage with high concentration.
Description
Technical field
The invention belongs to sewage disposal, environmental protection technical field, be specifically related to a kind of rotating wetland filtering pond+lateral subsurface flow wetland bed waste water treatment system device and treatment process.
Background technology
Look into newly by science and technology, not seeing as yet at present both at home and abroad has the research bibliographical information that adopts deflector type wetland filter tank and lateral subsurface flow wetland bed technique to handle town sewage, and also not seeing has deflector type wetland filter tank+relevant report that lateral subsurface flow wetland bed compounding technology is disposed of sewage.
The Ecological Disposal technology of utilizing " natural purification system " is by reclaiming, utilizing the resource in the biosystem to play a role, be a kind of low cost in the sewage disposal, less energy-consumption, the simple and easy treatment technology that effectively combines with ecoscape, this is a kind of desirable water prevention and cure of pollution technology for the area that lacks in fund, technology.
Existing artificial marsh sewage treating method mainly contains: free-water level (spacious stream, surface current) type, undercurrent type, undercurrent percolation type, notch cuttype etc.The handling principle of free-water level type artificial swamp is comparatively similar to biological pond, and its processing efficiency is low, takes up an area of and Chi Rongda, and investment is high.Current wetland mainly is to utilize the cut-off filter effect of filler and part biological sorption and remove pollutent, and subject matter is that sewage mainly is under anaerobism or the anoxia condition, and effluent quality is relatively poor, occurs slough and blockage problem easily.Undercurrent percolation type artificial swamp is actually a kind of of percolation type land treatment system, sewage is by the water distribution system water distribution, through packing layer and pedosphere, collect by the header that is embedded in the soil at last downwards, mainly utilize the filtration of filler and soil, adsorption to remove pollutent.The subject matter of these artificial wet land treating methods has: need comparatively complicated water distribution system, short easily stream, treatment effect is difficult to long-time maintenance, stop up easily, floor space is big, mainly be applicable to the raw waste water of lower concentration or micro-polluted water etc., generally bad for the town sewage effect, successful example preferably not also.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, a kind of rotating wetland filtering pond+lateral subsurface flow wetland bed waste water treatment system device and method is provided, it is low to solve the prior art utilization rate of tank volume, floor space is big, short easily stream, treatment effect is difficult to long-term maintenance, is not suitable for the problem of handling the higher concentration town sewage.
Technical scheme of the present invention is as follows:
A kind of rotating wetland filtering pond+lateral subsurface flow wetland bed waste water treatment system device, with the downward form of gradient, the water route links to each other and constitutes successively by pre-treatment structures, deflector type wetland filter tank group, lateral subsurface flow wetland bed group for it.
Described deflector type wetland filter tank group is made up of the multistage filter tank that forms downward gradient; be provided with vertical choking wall in each filter tank; reserve water stream channel on top, filter tank or bottom, current pass the filter tank with the fluidised form of baffling up and down, place haydite or zeolite filler in the filter tank and plant waterplant.
Described lateral subsurface flow wetland bed group is made up of the downward lateral subsurface flow wetland bed of multistage gradient, natural reaeration district and concurrently oxygen stabilization pond; Be provided with parallel staggered training wall in each lateral subsurface flow wetland bed, separated by spaces in the bed is become the current raceway groove of S shape, in raceway groove, place ceramics filling, and the plantation waterplant; Upper level wetland bed with link to each other by the natural reaeration district between next stage is wetland bed, the wetland bed connection stabilization pond of last step, stabilization pond are one to hold the water structures, drainage pipeline is arranged at terminal bottom.
The packing material size of placing in described deflector type wetland filter tank not at the same level and the lateral subsurface flow wetland bed dwindles successively.
Described natural reaeration district adopts drop water aeration pond form in the steeper area of physical features, has 1.0 meters～1.5 meters drop drop between this drop water aeration pond and the upper level lateral subsurface flow wetland bed.
Described natural reaeration district adopts thin water layer reoxygenation ditch form in the more smooth area of physical features, should thin water layer reoxygenation ditch be a horizontal channel, current form thickness in ditch be 3～10 millimeters thin water layer, makes water fully contact with air, reaches the purpose of natural reaeration.
Plantation has submerged plant or emergent in the described stabilization pond.
Described pre-treatment structures are made up of grid and settling pit successively.
It is as follows to utilize the said system device to carry out the method steps of rotating wetland filtering pond+lateral subsurface flow wetland bed sewage disposal:
1, earlier town sewage is carried out pre-treatment, remove bigger floating matter, suspended substance and the silt of particle diameter;
2, pretreated sewage enters deflector type wetland filter tank group, sewage is walked with mode plug-flow in the filter tank of baffling up and down, filling surface in the filter tank forms the anaerobe film, sewage is under the effect of anaerobion, anaerobic reaction and hydrolysis reaction take place, and leaf, stem and root by waterplant transmit dissolved oxygen to the middle part, filter tank, forms aerobic microenvironment, removes organism in the sewage and nutritive substance nitrogen, phosphorus;
3, the water of handling through deflector type wetland filter tank flows into the lateral subsurface flow wetland bed downwards, sewage is carried out with S type undercurrent in wetland bed, under the effect of waterplant, substantially be in wetland bed under the oxygen condition of holding concurrently, sewage natural reaeration district between wetland bed carries out natural reaeration, improve oxygen level in the follow-up wetland, through the aerobic circulating biological reaction of multistage current wetland bed → natural reaeration district → current wetland bed circulation carrying out multi-stage anaerobic → aerobic-anoxic, remove organism and nitrogen repeatedly;
4, the water after the processing enters stabilization pond at last, further evolves in the pond ecosystem of simulating nature, detects and discharges after water quality reaches emission standard.
4. Fa Ming advantage and positively effect
This rotating wetland filtering pond+lateral subsurface flow wetland bed sewage disposal technology is compared with existing artificial swamp technology has following advantage.
1. existing artificial swamp treatment technology is primarily aimed at the micro-polluted water (as polluted river water, rainwater) of lower concentration, and it is also few to be directly used in the examples of many successful of handling the higher concentration town sewage.The technology of the present invention is promptly developed at the town sewage of higher concentration.
2. treatment effect is good, and can keep for a long time.The anaerobe reaction at first takes place in sewage in deflector type wetland filter tank, macromolecule organic in the raw waste water is converted into low molecule organic matter, improve the biodegradability of sewage, in the lateral subsurface flow wetland bed of aerobic, double oxygen, remove the pollutent of the overwhelming majority then, enter stabilization pond at last, guarantee effluent quality.At hydraulic detention time (the required hydraulic detention time of existing artificial swamp treatment technology generally needs 5-10 days) in 12 ~ 24 hours, effluent quality can reach country's " urban wastewater treatment firm pollutant emission standard " one-level B standard (GB18918-2002) fully.Filler is arranged on the whole flow direction, and particle diameter is descending, can make full use of the effect of damming of filler, and is difficult for stopping up, and can keep treatment effect for a long time.
3. utilization rate of tank volume height, floor space is little, does not need additionally to provide power.Existing constructed wetland waste water treatment technology usually because water distribution is inhomogeneous, the slough occurs, and utilization rate of tank volume is not high; Processing efficiency is low simultaneously, and the pond depth causes floor space very big.The technology of the present invention, sewage is walked in total system with the form of plug-flow attitude, walks with S type fluidised form in the lateral subsurface flow wetland bed by the filter tank in baffling mode up and down in deflector type wetland filter tank, and total system does not have the slough, and utilization rate of tank volume improves greatly.Adopt the Processing Structure of first anaerobism (deflector type wetland filter tank) back aerobic (lateral subsurface flow wetland bed) simultaneously, improve processing efficiency greatly, increased pond dark (mainly in first section deflector type filter tank) again and significantly reduced floor space, this is very meaningful to the area of land used anxiety.The required unit occupied area of the technology of the present invention Treating Municipal Sewage is 2～3.5m
2/ (m
3/ d), well below 15～50m of existing artificial swamp treatment technology
2/ (m
3/ d).
Description of drawings
Fig. 1 is the schema of deflector type wetland filter tank+lateral subsurface flow wetland bed sewage water treatment method;
Fig. 2 is the floor map of deflector type wetland filter tank+lateral subsurface flow wetland bed waste water treatment system device;
Fig. 3 is that the A of Fig. 2 is to view.
Embodiment
Further describe the present invention below in conjunction with Fig. 1, Fig. 2 and Fig. 3 from the angle of water treatment procedure:
Town sewage is admitted to pre-treatment structures 2 through inlet channel 1, at first can carry out pre-treatment through grid 21, settling pit 22, removes bigger floating matter, suspended substance and the silt etc. of particle diameter, avoids follow-up deflector type wetland filter tank to stop up.Sewage can further be removed the bigger suspended substance of particle diameter simultaneously through equalizing tank 23 regulating pondages and water quality then.
Enter deflector type wetland filter tank group 3 through pretreated raw waste water by pipeline.This deflector type wetland filter tank group 3 is made up of by downward gradient array in 700～1000 millimeters filter tank three grades of degree of depth.Be provided with vertical choking wall 31 in each filter tank, reserve water stream channel 32 in filter tank bottom, current pass with U-shaped at the bottom of the pond, and sewage is walked with mode plug-flow in the group of filter tank of baffling up and down.In deflector type wetland filter tank, place ceramics filling or the zeolite filler 33 (can place the filler of uniform grading in the one-level filter tank, but the packing material size in filter tank at the same level should not dwindle successively) of particle diameter 12～6mm.Deflector type wetland filter tank is behind normal the startup, and filling surface can form the anaerobe film, and sewage under the effect of anaerobion anaerobic reaction and hydrolysis reaction takes place.The larger molecular organics of former water can be degraded to small organic molecule and the CH that is easy to aerobic decomposition
4, H
2S and H
2Inorganicss such as O, the waterplant of planting simultaneously in the filter tank 34 can absorb a part of nutritive substance, is used for self growth, transmits dissolved oxygen by leaf, stem and root to the middle part, filter tank simultaneously, the aerobic microenvironment of local formation is convenient to the removal of organism and nutritive substance nitrogen, phosphorus around in the root district.
Sewage enters lateral subsurface flow wetland bed group 4 by pipeline and handles after handling through deflector type wetland filter tank.Lateral subsurface flow wetland bed group is made up of multistage lateral subsurface flow wetland bed 41, natural reaeration district 42 and concurrently oxygen stabilization pond 43.Inhomogeneous for fear of water distribution, improve utilization rate of tank volume, be provided with parallel staggered training wall 411 in each lateral subsurface flow wetland bed, separated by spaces in the bed is become the current raceway groove 412 of S shape, sewage is with the undercurrent implementation in wetland bed of S type.Wetland bed channel depth is set to 200～500 millimeters, and channel width is 400～1000 millimeters, (looking conditions such as handling the water yield and land used restriction determines).Place ceramics filling in raceway groove, the packing material size in filter tank at the same level should not dwindle successively.Plantation waterplant 413 in raceway groove.Because whole channel depth is more shallow, in the coverage of root system of plant, so under the comparatively intensive prerequisite of plant cultivating, be in substantially under the oxygen condition of holding concurrently in wetland bed.Link to each other by natural reaeration district 42 between the wetland bed and back one-level of upper level is wetland bed.When landform is steep, in order to strengthen the reoxygenation amount, improve oxygen level in the follow-up wetland, can adopt the mode of drop water aeration; If landform is more smooth, drop water aeration is set comparatively at need, can adopt thin water layer reoxygenation ditch to carry out natural reaeration (as shown in Fig. 2 and 3), this ditch is a horizontal channel, be that current are through one section horizontal channel, forming thickness is the thin water layer of 3～10mm, makes water extensively to contact with air, increases reoxygenation efficient.Pass through multistage current wetland bed → natural reaeration district → current wetland bed → natural reaeration district so repeatedly ... it is aerobic that sewage is in multistage anoxic → aerobic-anoxic continuously ... the circulating biological reaction, organism in the sewage is well removed, and nitrogen also obtains removing by multistage aerobic nitrification effect and anoxic denitrification effect simultaneously.
Water after the processing enters concurrently oxygen stabilization pond 43 at last, and concurrently oxygen stabilization pond is appearance water structures, and drainage pipeline 5 is arranged at terminal bottom.In concurrently oxygen stabilization pond 43, can plant some submerged plants or emergent 431, can raise fish, the pond ecosystem of simulating nature simultaneously.Sewage after wetland bed processing can further be evolved in stabilization pond, can characterize the water quality quality of water outlet simultaneously by the fish in the stabilization pond and some other indicative biologies.
The applicant adopts system and method for the present invention respectively at state, the Liangshan Mountain, Sichuan Province Lugu Lake landscaped area sewage works (2000m
3/ d) press down (800m of sewage work with Zhong County, Chongqing City new life
3/ d) in experimental applications, treatment effect is good, effluent quality " urban wastewater treatment firm pollutant emission standard " primary standard (GB18918-2002) that is up to state standards.In the application of Lugu Lake landscaped area, state, the Liangshan Mountain, Sichuan Province sewage works, raw waste water design influent quality is COD350mg/L, BOD 200mg/L, NH
3-N 35mg/L, TP 4.0mg/L, hydraulic detention time are under 24 hours the situation, effluent quality " urban wastewater treatment firm pollutant emission standard " the one-level A standard (GB18918-2002) that is up to state standards.
Claims (7)
1. rotating wetland filtering pond+lateral subsurface flow wetland bed waste water treatment system device is characterized in that: with the downward form of gradient, the water route links to each other and constitutes successively by pre-treatment structures, deflector type wetland filter tank group, lateral subsurface flow wetland bed group in system;
Described deflector type wetland filter tank group is made up of the multistage filter tank that forms downward gradient, be provided with at least one vertical choking wall in each filter tank, reserve water stream channel on top, filter tank or bottom, current pass the filter tank with the fluidised form of baffling up and down, place haydite or zeolite filler in the filter tank and top plantation waterplant;
Described lateral subsurface flow wetland bed group is made up of the downward lateral subsurface flow wetland bed of multistage gradient, natural reaeration district and concurrently oxygen stabilization pond; Be provided with parallel staggered training wall in each lateral subsurface flow wetland bed, separated by spaces in the bed is become the current raceway groove of S shape, in raceway groove, place ceramics filling, and the plantation waterplant; Upper level wetland bed with link to each other by the natural reaeration district between next stage is wetland bed, the wetland bed connection concurrently oxygen stabilization pond of last step, concurrently oxygen stabilization pond are one to hold the water structures, drainage pipeline is arranged at terminal bottom.
2. Sewage treatment systems device according to claim 1 is characterized in that: the packing material size of placing in described rotating wetland filtering pond not at the same level and the lateral subsurface flow wetland bed dwindles successively.
3. Sewage treatment systems device according to claim 1 and 2 is characterized in that: described natural reaeration district is a drop water aeration pond, has 1.0～1.5 meters drop drop between this drop water aeration pond and the upper level lateral subsurface flow wetland bed.
4. Sewage treatment systems device according to claim 1 and 2 is characterized in that: described natural reaeration district is a thin water layer reoxygenation ditch, and this thin water layer reoxygenation ditch is a horizontal channel, and current form thickness in ditch be 3～10 millimeters thin water layer.
5. Sewage treatment systems device according to claim 1 and 2 is characterized in that: plantation has submerged plant or emergent in the described concurrently oxygen stabilization pond.
6. Sewage treatment systems device according to claim 1 and 2 is characterized in that: described pre-treatment structures are made up of grid and settling pit successively.
7. rotating wetland filtering pond+lateral subsurface flow wetland bed sewage water treatment method, treatment step is as follows:
(1) earlier town sewage is carried out pre-treatment, remove bigger floating matter, suspended substance and the silt of particle diameter;
(2) pretreated sewage enters deflector type wetland filter tank group, sewage is walked with mode plug-flow in the filter tank of baffling up and down, filling surface in the filter tank forms the anaerobe film, sewage is under the effect of anaerobion, anaerobic reaction and hydrolysis reaction take place, and leaf, stem and root by waterplant transmit dissolved oxygen to the middle part, filter tank, forms aerobic microenvironment, removes organism in the sewage and nutritive substance nitrogen, phosphorus:
(3) water of handling through deflector type wetland filter tank flows into the lateral subsurface flow wetland bed downwards, sewage is carried out with S type undercurrent in wetland bed, under the effect of waterplant, substantially be in wetland bed under the oxygen condition of holding concurrently, sewage natural reaeration district between wetland bed carries out natural reaeration, improve oxygen level in the follow-up wetland, through the aerobic circulating biological reaction of multistage current wetland bed → natural reaeration district → current wetland bed circulation carrying out multi-stage anaerobic → aerobic-anoxic, remove organism and nitrogen repeatedly;
(4) water after the processing enters stabilization pond at last, further purifies in the pond ecosystem of simulating nature, detects and discharges after water quality reaches emission standard.
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| CNB2005100570472A CN100415662C (en) | 2005-04-28 | 2005-04-28 | System and process for sawage treating with baffling wet land filtering tank and rateral underflow wet land bed |
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| CN100415662C true CN100415662C (en) | 2008-09-03 |
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| 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 |
| CN111977813B (en) * | 2020-08-14 | 2022-04-22 | 苏州工业园区园林绿化工程有限公司 | Constructed wetland sewage treatment system |
| CN113087304A (en) * | 2021-04-12 | 2021-07-09 | 浙江大学能源工程设计研究院有限公司 | Pharmaceutical chemical wastewater treatment method and multi-stage plug-flow double-layer facultative reactor |
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