CN107055754A - A kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas - Google Patents
A kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas Download PDFInfo
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- CN107055754A CN107055754A CN201710055117.3A CN201710055117A CN107055754A CN 107055754 A CN107055754 A CN 107055754A CN 201710055117 A CN201710055117 A CN 201710055117A CN 107055754 A CN107055754 A CN 107055754A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/06—Aerobic processes using submerged filters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2826—Anaerobic digestion processes using anaerobic filters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas, its structure is to set multiple sewage disposal units in underground；It will be circulated and intensive treatment in rural domestic sewage collection to sewage disposal unit by water delivery pipeline system, the sanitary sewage after processing is used as agricultural irrigation water or recharge of groundwater or is discharged directly into river course；Described sewage disposal unit includes：Pretreatment pool, circulatory pool and the part of Zero-valent Iron biofilter three, each processing unit structures are separate, are connected to each other by pipeline.Advantage：Low-maintenance, low energy consumption, anti-water quality and quantity impact, sewage treating efficiency is high；The respective advantage of intensive and ecological two kinds of technology paths is only coupled by a pump, the drainage situation of reply rural area complexity freely, it is ensured that the stabilization of effluent quality；Earth's surface land resource is saved simultaneously, and simple to be applicable, operational management is convenient, cheap.
Description
Technical field
The present invention relates to a kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas, can directly it apply
To the small-sized sanitary sewage disposal of domestic sewage in rural areas or villages and small towns, degraded and the water quality of Rural Plane Source Pollution thing simultaneously can be used for
Purification.Belong to environment protection sewage process field.
Background technology
Country sewage is scattered due to area, and the size of population is larger, collects the reasons such as difficulty and causes country sewage to turn into river lake water
The important pollution sources of body pollution, are also the important component of Rural Plane Source Pollution；Contain substantial amounts of organic matter in country sewage
With the organic salt such as nitrogen, phosphorus, undressed domestic sewage in rural areas is discharged directly into natural water, not only have impact on and make produce
Amount, and serious harm is brought to ecological environment and river and lake water quality.Therefore, the improvement of domestic sewage in rural areas is very urgent, and
It is significant.
The tupe of sanitary sewage includes focusing on and separated practices pattern；Focus on technology and technique
Highly developed, based on urban wastewater treatment firm, its day-to-day operation can reach relatively stable treatment efficiency；And rural area one
As in remote districts, sewage collecting pipe network is difficult to cover, therefore, and country sewage typically uses separated practices pattern；It is external
Include for the mainstream technology that domestic sewage in rural areas is used：Biological contact oxidation process, SBR activated sludge processes and membrane biological reaction
Device etc.；These techniques, technical requirements are higher, and technique controlling difficulty is big, and operating cost is higher, is unsuitable for the place of China's country sewage
Reason pattern；At present, the technology that China's country sewage is used mainly include sewage plant technique is minimized biologic treating technique, with
The coupling processing technology that artificial swamp is the eco-treatment technology of core and both are combined.Equally, these techniques there is also
Some problems, such as sewage treatment plant's technique miniaturization specific energy consumption are higher, and rural area lacks technical staff；Artificial swamp is accounted for
Ground area is big, and treatment effect is unstable；And China's rural area water change of water quality is big, peak draining can be set in the short time to processing
Apply the impact for causing water quantity and quality.In addition, nitrogen, phosphorus concentration are of a relatively high in China's domestic sewage in rural areas, general handling process
Removal effect to total nitrogen is not good.As Publication No. CN104098223B discloses a kind of rural scattered domestic sewage processing system
System and method, " biology " and " ecology " are coupled, and collect the advantage of the technology such as ecological floating island and artificial swamp, creative proposition
Ecological floating island-Artificial Wetland Techniques new technology of combined, makes full use of the repair of water plant, without taking up an area, cost it is low
Honest and clean and high treating effect, by sewage, controlledly dosing is to filler often in saturation state filler, and sewage is in a certain direction
During flowing, under the physics, chemical cooperated effect in filler, dirty Organic substance in water is by filtering, adsorbing, absorption,
Aerobic-anaerobic microbe is promoted to decompose to realize the high-efficient purification to sewage.But due to lacking the supply of carbon source and the battalion of anaerobic environment
Make, the system denitrifying capacity is weaker, and outlet effect is unstable.Just at present, the life in the countryside of practical application is put into
Sewage disposal system still has some limitations.
The present invention summarizes the deficiency in the existing technology for treating domestic sewage in rural area of China, takes into full account at China's country sewage
The demand and feature of reason, innovative proposes low-maintenance, and low energy consumption, anti-water quality and quantity impacts, and outlet effect stabilization
The intensive circulation Zero-valent Iron biofilter technology with water quality intensive treatment of coupling.
The content of the invention
Proposed by the present invention is a kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas, and its purpose is intended to
Overcome not enough present in existing technology for treating domestic sewage in rural area, with low-maintenance, low energy consumption, anti-water quality and quantity impact is dirty
Water treatment efficiency is high, stable effluent quality, while simple be applicable, operational management is convenient, the features such as cheap, and can answer extensively
For the intensive circulation Zero-valent Iron biofilter with intensive treatment of domestic sewage in rural areas.
The technical solution of the present invention：A kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas, its
It is characterised by：In underground, multiple sewage disposal units are set；By water delivery pipeline system by rural domestic sewage collection to sewage
Is circulated and intensive treatment in disposal unit, the sanitary sewage after processing as agricultural irrigation water or recharge of groundwater or
Person is discharged directly into river course；Described sewage disposal unit includes：Pretreatment pool, circulatory pool and Zero-valent Iron biofilter three
Part, three parts connect successively；Multiple sewage disposal unit structures are separate, connected to each other by pipeline；Institute
The Zero-valent Iron biofilter stated is divided into ordinary biofilter and built-in zero-valent iron reinforcing reaction tank two parts.
Advantages of the present invention：
（1）The respective advantage of intensive and ecological two kinds of technology paths, reply rural area freely have only been coupled by a pump
Complicated drainage situation, it is ensured that the stabilization of effluent quality；
（2）Aerobic-anaerobic-the anaerobic condition for forming different depth is built, beneficial to the removal of total nitrogen, Zero-valent Iron is reacted in anaerobic zone
In case, the microorganism growth of heterotrophic denitrification performance can be strengthened by the use of rice straw or wood chip as solid carbon source using additional,
Zero-valent Iron/microorganism coupled system is ultimately formed, NO is enhanced3 -Removal, while generation Fe3+/Fe2+There is good wadding
Solidifying performance, enhances the removal for the phosphorus that anaerobism is discharged；
（3）Zeolite layer is set above Zero-valent Iron reaction chamber, effluent quality has been ensured, also anaerobic environment is created for lower floor, extends
The service life of Zero-valent Iron；
（4）Whole circulating biological filter tank low-maintenance, low energy consumption, anti-water quality and quantity impact, sewage treating efficiency is high；
（5）Processing structures are embedded in underground, save ground resource, and raw brick is planted in laying at the top of disposal unit, builds good life
State environment；
（6）Zero-valent Iron reaction chamber is readily inspected replacing, is easy to management with safeguarding；
（7）Whole Engineering Material Price is cheap, be easily obtained and will not produce secondary pollution to environment；
（8）Whole engineering construction is simple, easy construction, function-stable, cheap, easy to use.
Brief description of the drawings
Accompanying drawing 1 is the circulation Zero-valent Iron biofilter schematic diagram of intensive treatment domestic sewage in rural areas.
Accompanying drawing 2 is the circulation Zero-valent Iron biofilter floor map of intensive treatment domestic sewage in rural areas.
Accompanying drawing 3 is Zero-valent Iron reaction chamber schematic diagram.
1 in figure it is aqueduct, 2 be pretreatment pool, 3 be grid in 10~40mm, 4 be circulatory pool, 5 is that sludge is collected
Groove, 6 be circulation air dissolved pump, 7 be discharge pipeline, 8 be sludge pump, 9 be Zero-valent Iron biofilter, 10 be water distribution area, 11 be that biology is filled out
Material（One kind in rubble, cobble, clinker or coke）, 12 be cobble supporting layer, 13 be reflux line, 14 be Zero-valent Iron reaction
Case, 15 be zeolite filler, 16 be overflow plate, 17 be drainage pipeline, 18 be φ 15 framework of steel reinforcement, 19 be wire rope net surface, 20 be
Zero-valent Iron filler（Combined by the one or more in three kinds of sponge iron, iron plane flower and waste iron filing）, 21 be wood chip（Straw
Stalk）, 22 be annulus hook.
Embodiment
A kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas, its structure is to set multiple dirts in underground
Water disposal unit；By water delivery pipeline system will be circulated in rural domestic sewage collection to sewage disposal unit and reinforcing at
Reason, the sanitary sewage after processing is used as agricultural irrigation water or recharge of groundwater or is discharged directly into river course；Described
Sewage disposal unit includes：Pretreatment pool, circulatory pool and the part of Zero-valent Iron biofilter three, each processing unit structures are mutual
It is independent, connected to each other by pipeline；Described Zero-valent Iron biofilter is divided into ordinary biofilter and built-in zero-valent iron
Strengthen reaction tank two parts.
The multiple sewage disposal unit is by fully buried or semi-buried in underground setting.
The pretreatment pool, which mainly removes suspension in raw sewage etc., can block the pollutant of filtrate, and make water quality equal
Change；Grid in built in pretreatment pool, the larger house refuse of interception and impurity.
A circulation air dissolved pump built in the circulatory pool, carries out effluent cycle and oxygen-enriched；Only by a pump coupled it is intensive and
The respective advantage of ecological two kinds of technology paths, the drainage situation of reply rural area complexity freely, it is ensured that effluent quality
It is stable；Air dissolved pump carries oxygen-enriched function simultaneously, and aerobic condition is provided for ordinary biofilter；Close to Zero-valent Iron in circulatory pool
The side wall of biofilter sets sludge collecting tank and discharge pipeline；Sludge collecting tank is mainly used in being enriched with and concentrated discharges through return duct
Come off and aging biomembrane, while the clear liquid on upper strata flows back into circulatory pool；Circulatory pool side wall close to collecting tank
Bottom set discharge pipeline, pass through sludge pump discharge concentration after sludge.
The Zero-valent Iron biofilter, profile is subcircular, and circular design can be eliminated at " dead angle "；Outermost wall
By Anti-seeping technology；Centre is common biological filter material pond, and internal layer is Zero-valent Iron reaction tank；The Inlet and outlet water side of Zero-valent Iron biofilter
Formula is " Zhou Jinzhong goes out ", and sewage enters water distribution area by aqueduct, is uniformly sprayed by water-locator and respectively enters common biology
Filler pond and Zero-valent Iron reinforcing reaction tank；Common biology filter material pond is configured to：Upper strata sets working lining, and the filler of working lining can
One kind in the rubble, cobble, clinker or the coke that are easily obtained for locality, particle diameter is 25~40mm, and the thickness of working lining is
1.5~1.8m；Lower floor sets supporting layer, and particle diameter is the scleroid cobbles of 70 ~ 100mm, and the thickness of supporting layer is 0.2m.Commonly
Filler surface attachment grown a large amount of microorganisms in biological filter material pond, forms biofilm system, the pollutant in sewage is played
Biodegradable effect；And because dissolved oxygen is constantly consumed in the biodegradation process of pollutant, from top to bottom gradually
Form aerobic zone and anoxic zone.Inner ring is that Zero-valent Iron strengthens reaction tank, and bottom is also the supporting layer of 0.2m thickness；The bottom of supporting layer
The centrally disposed reflux line in portion, the other end of reflux line is connected with circulatory pool, and the sewage of backflow and the biomembrane come off are arranged
Enter into sludge collecting tank, in addition, being advantageous in that before return duct setting Zero-valent Iron reaction zone can ensure to enter anaerobism zero
Valency iron reaction zone NO3 -Concentration；The packaged type Zero-valent Iron reaction chamber that quantity is not waited is loaded on supporting layer top successively, and Zero-valent Iron is anti-
It is cylinder to answer case, using φ 15 reinforcing bar as support frame, and its diameter is equal to the internal diameter that Zero-valent Iron strengthens reaction tank, and height is about
For 30cm, Zero-valent Iron reaction chamber is set to openable, and sets annulus to link up with the position at upper surface center, to check
Change；Filler is combined by the one or more in three kinds of sponge iron, iron plane flower and waste iron filing in Zero-valent Iron reaction chamber, together
When additional 10% volume wood chip or stalk.Zero-valent Iron reaction chamber is the core space of whole system, and it is to the pollutant in sewage
Play a part of reinforcing to remove, particularly nitrogen, phosphorus；Anaerobic zone of the Zero-valent Iron reaction chamber in whole biofilter, additional carbon,
Be conducive to the growth of denitrifying microorganism, in Zero-valent Iron reaction chamber microorganism be attached on irony carrier form Zero-valent Iron/
Microorganism coupled system, enhances NO3 -Removal, while generation Fe3+/Fe2+There is good flocculating property, enhance and detest
The removal for the phosphorus that oxygen evolution comes out；Micropollutants in the laying zeolite adsorption water outlet of Zero-valent Iron reaction chamber upper strata, have ensured water outlet
Water quality, while also creating anaerobic environment for the Zero-valent Iron reaction chamber of lower floor；The water outlet of Zero-valent Iron reaction tank uses the shape of overflow
Formula.
The technical solution of the present invention is further described below in conjunction with the accompanying drawings：
Such as accompanying drawing 1, shown in accompanying drawing 2 and accompanying drawing 3, laying water pipes 1 are to collect agriculture at the dispersion user sewage generation of rural area
Village's sanitary sewage；Bury using complete or semi-buried dig pretreatment pool 2, circulatory pool 4 and Zero-valent Iron biofilter successively in underground
9；The inside of pretreatment pool 2 sets 10~40mm middle grid 3；The side of pretreatment pool 3 is connected by aqueduct 1 with circulatory pool 4
It is logical；Side wall close to Zero-valent Iron biofilter 9 in circulatory pool 4 sets sludge collecting tank 5 and discharge pipeline 7；In sludge collecting tank 5
Sludge after concentration is discharged by sludge pump 8；A circulation air dissolved pump 6 built in circulatory pool（Carry oxygen-enriched function）, pass through water delivery
Pipeline is by the sewage lifting in circulatory pool to Zero-valent Iron biofilter 9；9 points of Zero-valent Iron biofilter is outermost wall, in
The Zero-valent Iron reaction tank of the common biological filter material pond and internal layer of interbed, be between common biology filter material pond and Zero-valent Iron reaction tank through
Cross the wall of Anti-seeping technology；The sewage of aqueduct is uniformly dispensed to the common biological filter material pond in intermediate layer by water distribution area 10
The surface of biologic packing material 11；The design height of packing layer 11 is about 1.5~1.8m, and packing material size is 25~40mm, selected filler（It is broken
One kind in stone, cobble, clinker or coke）Quality answers uniformity, and gathers materials on the spot, just with processing and transporting；Filler
The lower section of layer 11 laying 0.2m cobble supporting layer 12, the packing material size of cobble supporting layer 12 is between 70~100mm；Supporting layer 12
Bottom centre sets reflux line 13, and the other end of reflux line is connected with the sludge collecting tank 5 in circulatory pool 4；The zero of internal layer
The structure of valency iron reaction tank is that, by loading the Zero-valent Iron reaction chamber 14 that 5~6 height are about 0.3m, Zero-valent Iron reaction chamber 14 is
Cylinder, using φ 15 reinforcing bar as support frame 18, using wire rope net surface 19 as outer surface, the aperture of wire rope net surface is slightly less than
The particle diameter of iron filler；The disc diameter of Zero-valent Iron reaction chamber is equal in the internal diameter of Zero-valent Iron reaction tank, Zero-valent Iron reaction chamber 14
Filler is by Zero-valent Iron filler 20（One or more in three kinds of sponge iron, iron plane flower and waste iron filing are combined）With it is additional
The wood chip of 10% volume（Stalk）21 compositions；Zero-valent Iron reaction chamber is set to openable, and is set in the position at upper surface center
Annulus hook 22 is put, is easy to guide and support and checks replacing；Lay 0.3m zeolite filler 15, zeroth order in the upper strata of Zero-valent Iron reaction chamber 14
The delivery port of iron reaction tank sets overflow plate 16；Overflow water outlet is recycled by drainage pipeline 17 or directly discharged.
Flowers and plants and trees can be planted in the top of structures, good ecological environment is built.
A kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas, it handles the method for sewage, including such as
Lower step：
1）Pretreatment pool：The sanitary sewage of rural area casual household discharge is collected by aqueduct 1 and is discharged into pretreatment pool 2, in advance
The inside of processing pond 2 sets 10~40mm middle grid 3, larger house refuse and impurity to intercept；Sewage is being located in advance simultaneously
Manage and short stay is carried out in pond, main suspension removed in raw sewage etc. can block the pollutant of filtrate, and make water quality equal
Change；
2）Circulatory pool：Sewage after the preprocessed homogenizing of pond 2, enters circulatory pool 4 by aqueduct 1；One built in circulatory pool 4
Air dissolved pump 6 is circulated, effluent cycle is carried out and oxygen-enriched, the respective of intensive and ecological two kinds of technology paths has only been coupled by a pump
Advantage, the drainage situation of reply rural area complexity freely, it is ensured that the stabilization of effluent quality；Air dissolved pump 6 carries richness simultaneously
Oxygen function, aerobic condition is provided for ordinary biofilter.Side wall in the nearly Zero-valent Iron biofilter 9 of circulatory pool sets sludge to collect
Groove 5, the biomembrane that backflow sewage and aging for receiving Zero-valent Iron biofilter come off；Biomembrane after concentration passes through row
Mud pipe 7 is discharged via sludge pump 8；
3）Zero-valent Iron biofilter：The sewage of circulatory pool 4 is delivered to the upper water distribution area of Zero-valent Iron biofilter by air dissolved pump 6
10, to the upper surface of biologic packing material 11 dispense sewage by the way that water-locator is uniform, a large amount of microorganisms of biological filter material pond filler surface attachment,
Biofilm system is formed, biodegradable effect is played to the pollutant in sewage；It is oxygen-enriched due to enter biological filter material pond
Sewage, the predominantly aerobic microbiological of filtrate upper strata attachment, and needed during the microbial degradation of pollutant in consumption water
Dissolved oxygen, from top to bottom dirty oxygen in water gradually decrease, form the anoxic zone of lower floor；After being handled by biofilter
Sewage enters middle anaerobic zero-valent iron reaction chamber 14 by supporting layer 12；The condition of aerobic-anaerobic-anaerobism, beneficial to total nitrogen
Remove, the Zero-valent Iron of anaerobic zone and microorganism form Zero-valent Iron/microorganism coupled system, enhance NO3 -Removal, simultaneously generate
Fe3+/Fe2+There is good flocculating property, enhance the removal for the phosphorus that anaerobism is discharged；In the upper of Zero-valent Iron reaction zone
Layer lays zeolite layer 15, and the micropollutants in absorption water outlet have ensured effluent quality；It is provided with the bottom centre of supporting layer 12
Return duct 13, for sewage and the biomembrane that comes off of flowing back, return duct sets that be advantageous in that before Zero-valent Iron reaction zone can be with
Ensure to enter anaerobic zero-valent iron reaction zone NO3 -Concentration.
Claims (7)
1. a kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas, it is characterised in that：Set multiple in underground
Sewage disposal unit；It will be circulated and strengthened in rural domestic sewage collection to sewage disposal unit by water delivery pipeline system
Processing, the sanitary sewage after processing is used as agricultural irrigation water or recharge of groundwater or is discharged directly into river course；It is described
Sewage disposal unit include：Pretreatment pool, circulatory pool and the part of Zero-valent Iron biofilter three, three parts connect successively；Respectively
Individual sewage disposal unit structures are separate, connected to each other by pipeline；Described Zero-valent Iron biofilter is divided into
Ordinary biofilter and built-in zero-valent iron reinforcing reaction tank two parts.
2. a kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas according to claim 1, its feature
It is a circulation air dissolved pump built in described circulatory pool, carries out effluent cycle and oxygen-enriched；Circulatory pool is close to Zero-valent Iron biological filter
The side wall in pond sets sludge collecting tank and discharge pipeline.
3. a kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas according to claim 1, its feature
It is subcircular to be described Zero-valent Iron biofilter profile, and outermost layer is wall, and centre is common biological filter material pond, and inner ring is
Zero-valent Iron strengthens reaction tank, and Inlet and outlet water mode is " Zhou Jinzhong goes out ", and sewage sequentially passes through common biological filter material pond and Zero-valent Iron is strong
Change reaction tank, and in bottom centre's setting reflux line of Zero-valent Iron biofilter, the other end and circulatory pool of reflux line
It is connected, is passed into sludge collecting tank.
4. a kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas according to claim 3, its feature
It is working lining to be described ordinary biofilter upper strata, and the filler of working lining is local rubble, cobble, the clinker being easily obtained
Or one kind in coke, particle diameter is 25~40mm, and thickness is 1.5 ~ 1.8m；Lower floor is supporting layer, and particle diameter is 70 ~ 100mm's
Hard rubble or cobble, thickness is 0.2m.
5. a kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas according to claim 3, its feature
It is the packaged type Zero-valent Iron reaction chamber that the described built-in number completion amount of Zero-valent Iron reinforcing reaction tank is not waited；Zero-valent Iron reaction chamber is
Cylinder, using φ 15 reinforcing bar as its support frame, its diameter is equal to the internal diameter that Zero-valent Iron strengthens reaction tank, is highly about
30cm；Zero-valent Iron reaction chamber is set to openable, and sets annulus to link up with upper surface center, is easy to check and changes；
Lay zeolite in Zero-valent Iron reaction chamber upper strata；The side wall of Zero-valent Iron reinforcing reaction tank passes through Anti-seeping technology.
6. a kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas according to claim 5, its feature
It is in described Zero-valent Iron reaction chamber filler by one or more kinds of combinations in three kinds of sponge iron, iron plane flower and waste iron filing
Into while additional wood chip or stalk according to a certain percentage.
7. a kind of circulation Zero-valent Iron biofilter of intensive treatment domestic sewage in rural areas according to claim 1, its feature
It is that handling sewage comprises the following steps：
1）Pretreatment pool：Domestic sewage in rural areas is collected by pipe network and is discharged into pretreatment pool, and suspension in removal raw sewage etc. can
The pollutant of filtrate is blocked, and is homogenized water quality；
2）Circulatory pool：Built-in circulation air dissolved pump, carries out effluent cycle and oxygen-enriched, has only been coupled by a pump intensive and raw
The respective advantage of two kinds of technology paths of state, the complicated drainage situation in reply rural area freely, it is ensured that effluent quality it is steady
It is fixed；Air dissolved pump carries oxygen-enriched function simultaneously, and aerobic condition is provided for ordinary biofilter；In the nearly Zero-valent Iron biofilter of circulatory pool
Side wall sludge collecting tank is set, the biomembrane that backflow sewage and aging for receiving Zero-valent Iron biofilter come off, and
Carry out come off biomembrane enrichment concentration；After the side wall of circulatory pool sets discharge pipeline, discharge to concentrate by the bottom of collecting tank
Sludge；
3）Zero-valent Iron biofilter：The sewage of circulatory pool is delivered to the top of ordinary biofilter by air dissolved pump, passes through water distribution
Device is uniform to dispense sewage to filter material surface, and a large amount of microorganisms of biological filter material pond filler surface attachment form biofilm system, to dirt
Pollutant in water plays biodegradable effect；It is oxygen-enriched sewage due to enter biological filter material pond, the attachment of filtrate upper strata
Predominantly aerobic microbiological, and need to consume the dissolved oxygen in water during the microbial degradation of pollutant, it is dirty from top to bottom
Oxygen in water is gradually decreased, and forms the anoxic zone of lower floor；Sewage after biofilter is handled is entered by supporting layer
Middle anaerobic zero-valent iron reaction zone；The condition of aerobic-anaerobic-anaerobism, beneficial to the removal of total nitrogen, the Zero-valent Iron of anaerobic zone and micro-
Biology forms Zero-valent Iron/microorganism coupled system, enhances NO3 -Removal, while generation Fe3+/Fe2+There is good wadding
Solidifying performance, enhances the removal for the phosphorus that anaerobism is discharged；Zeolite layer is laid on the upper strata of Zero-valent Iron reaction zone, in absorption water outlet
Micropollutants, ensured effluent quality；Return duct is provided with the bottom of Zero-valent Iron biofilter, sewage and is come off for flowing back
Biomembrane, return duct is advantageous in that before being arranged on Zero-valent Iron reaction zone can ensure to enter anaerobic zero-valent iron reaction zone
NO3 -Concentration.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710055117.3A CN107055754B (en) | 2017-01-24 | 2017-01-24 | Circulating zero-valent iron biofilter for strengthening treatment of rural domestic sewage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710055117.3A CN107055754B (en) | 2017-01-24 | 2017-01-24 | Circulating zero-valent iron biofilter for strengthening treatment of rural domestic sewage |
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| CN107055754A true CN107055754A (en) | 2017-08-18 |
| CN107055754B CN107055754B (en) | 2020-09-01 |
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| CN110759595B (en) * | 2019-11-07 | 2020-08-04 | 生态环境部环境规划院 | Repair system for underground water with composite pollution of ammonia nitrogen and inorganic phosphorus |
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