CN1460649A - High-effective block-resisting soil biological waste water treatment system - Google Patents
High-effective block-resisting soil biological waste water treatment system Download PDFInfo
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- CN1460649A CN1460649A CN03126761A CN03126761A CN1460649A CN 1460649 A CN1460649 A CN 1460649A CN 03126761 A CN03126761 A CN 03126761A CN 03126761 A CN03126761 A CN 03126761A CN 1460649 A CN1460649 A CN 1460649A
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- waste water
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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 belongs to the field of waste water treatment technology, is mainly relates to a method for treating domestic sewage and can adopt active sludge method to treat industrial organic waste water, and is characterized by utilizing the behaviour of soil microbe for decomposing organics to make waste water treatment, and the cleaning rate of BOD and COD can be up to above 95%, and the land on the waste water treatment system, can be used as greening ground on which the crops of vegetable, etc. of flower plant can be planted. Said invention also provides a method adopting multilayer transition interface for resisting block and adopting combination of air channel and high permeability sandwich to supply oxygen.
Description
Technical field
The invention belongs to wastewater treatment, can be used for sanitary sewage and the processing that can adopt the industrial organic waste water of Wastewater Treated by Activated Sludge Process.
Background technology
Contain a large amount of microorganisms in the soil, the biomass geochemistry effect that they carry out in soil can decomposing organic matter.Utilize soil microorganisms that organic decomposability is carried out the very big concern that wastewater treatment causes people already.Relevant research work starts from the 1950's, and is used for the sanitary wastewater processing since the end of the seventies in American-European and Japan.Its basic skills is the sanitary wastewater that will discharge through septic tank by in the soil that is embedded in subterranean water spraying pipe and is uniformly distributed in certain area, waste water is in the infiltration downwards of soil top aeration zone, and organism is wherein resolved into innoxious substance (Fig. 1) by aerobic bacteria.Its advantage is that construction cost is low, keep 10% (even do not need keep management) of overheads less than the conventional activated sludge method, purification rate to BOD and COD can reach more than 95%, soil on the Waste Water Treatment can be used as crops such as nonirrigated farmland planting vegetable or as land use for greening such as flower nursery, lawns, be a kind ofly both to have an economic benefit, the sewage water treatment method of ecological benefits is arranged again.Up to the present, the U.S. has the sanitary wastewater above 1/3rd to adopt diafiltration soil biogeochemistry method to handle, and this method of wastewater treatment also is widely used in Japan, Canada and Europe.
In actual applications, because the existence of particulate organic matter in the waste water, more serious soil latch up phenomenon often appears in traditional soil organisms treatment process, the ponding of subrange generally occurs along water spraying pipe, even large-scale ponding occurs.Because aerobic bacteria metabolism decomposing organic matter need consume a large amount of oxygen, and the oxygen in the conventional process system is that the diffusion to aeration zone provides from the face of land in dependence, therefore, soil stops up and not only reduces soil permeability greatly, and the appearance of ponding reduces the rate of diffusion (because oxygen solubleness and rate of diffusion in water all very little) of oxygen to aeration zone greatly, thereby reduce the waste water treatment efficiency of system, even lose its wastewater treatment function.To soil water supply with aproll is inhomogeneous also can cause local ponding, reduce the efficient of system.In addition, in this Sewage treatment systems, organic aerobic bacteria Decomposition mainly occurs in underground 40-70cm place, because the vertical diffusion oxygen supply is slow, (handling one ton of sanitary wastewater every day need about 40m for traditional soil waste water system inefficiency
2Even up to a hundred square metres land area), and will keep the airing function (can not be that big area is by the road surface of cement casting or court) on ground, thereby the sanitary wastewater that makes this method still only be used at present live than the single family of dispersive is handled.
In sum, utilizing the biomass geochemistry cleaning action of soil to handle sanitary wastewater is a kind ofly both to have an economic benefit, and the sewage water treatment method of ecological benefits is arranged again, but traditional method processing efficiency is very low, and system stability is poor, and the scope of application is little.The objective of the invention is to adopt the anti-clogging plug of multilayer transition interface; Adopt air passageways and hypertonicity interlayer associating oxygen supply to improve the oxygen delivery capacity of system greatly, thereby improve the waste water treatment efficiency of system and the stability of system, make it to be applicable to the processing of sub-district, cities and towns sanitary wastewater and industrial organic waste water.
The content of invention
Efficient anti-blocking soil organisms Waste Water Treatment of the present invention, be to make waste water by in the pedosphere that is embedded in subterranean water spraying pipe and is distributed in the sufficient good penetrability of oxygen supply, characteristics are to adopt to improve system architecture and improve organic rate of decomposition in the oxygen supply raising waste water, mainly be to adopt the anti-clogging plug of multilayer transition interface, method with adopting air passageways and hypertonicity interlayer associating oxygen supply specifically comprises the steps:
1), adopts by gravel bed (3) → layer of sand (4) → sand layer (5) → soil layer (6) → be used for multilayered structure of the gravel bed (10) of draining, particulate organic matter is scattered on a plurality of interfaces, required oxygen is except the vertical diffusion from the face of land, main is to be provided by hypertonicity oxygen supply layer (7), can quicken the decomposition of particulate organic matter greatly, keep the perviousness of soil;
2), adopt side direction air passageways (8) and the associating oxygen supply of high infiltration oxygen supply layer (7), in this system, it mainly is the air passageways (8) that relies on terminal to be communicated with the face of land that oxygen is supplied with, and passes ventilative wall (9), finishes by hypertonicity oxygen supply layer (7).
The present invention is mainly by changing system architecture and improving oxygen supply and come the discrete particles organism and improve its rate of decomposition.Concrete grammar is to adopt by gravel bed (3) → layer of sand (4) → sand layer (5) → soil layer (6) → be used for multilayered structure of the gravel bed (10) of draining, particulate organic matter is scattered on a plurality of interfaces, required oxygen is except the vertical diffusion from the face of land, main is to provide (accompanying drawing 1) by hypertonicity oxygen supply layer (7), can quicken the decomposition of particulate organic matter greatly, keep the perviousness of soil.Therefore the present invention has designed side direction air passageways (8) and highly permeable sublayer (7) associating oxygen supply (accompanying drawing 1).In this system, it mainly is the air passageways (8) that relies on terminal to be communicated with the face of land that oxygen is supplied with, and passes ventilative wall (9), finishes by hypertonicity oxygen supply layer.This system not only can make the waste water treatment efficiency of system improve several times to tens times, even and since the inhomogeneous system that makes of aproll local ponding appears, also can obviously not influence the function of system, improved the stability of system.
Description of drawings:
Fig. 1 is efficient anti-blocking soil organisms Waste Water Treatment schematic cross-section;
1-genetic soil, the underground water spraying pipe of 2-, 3-gravel bed, 4-layer of sand, 5-sand layer, 6-soil or improved infiltrative soil, 7-hypertonicity oxygen supply layer, 8-air passageways, the 9-wall of breathing freely, 10-is used for the gravel bed of draining;
The technical measures that the present invention taked are according to following theoretical principle:
1, multilayer transition interface anti-clogging plug technology
When near the gravel bed of waste water water spraying pipe entered the less soil of particle diameter, the suspended particle organism in the waste water will be filtered off, and formed a thin layer that is rich in particulate organic matter at its near interface.Along with the accumulation of particulate organic matter, its perviousness reduces, and when waste water infiltration speed during less than delivery rate, just ponding can occur near water spraying pipe, and finally make the forfeiture of system function.The oxygen requirement of this thin layer is big, and the delivery rate of the organic content of suspended particle, oxygen requirement and oxygen is relevant in its thickness and the waste water.Increasing waste water is the most popular method that reduces the soil chocking-up degree in the residence time of anaerobic pond, but can not really deal with problems.The present invention is then mainly by changing system architecture and improving oxygen supply and come the discrete particles organism and improve its rate of decomposition.Concrete grammar is the multilayered structure that adopts by gravel bed → layer of sand → (sand layer) → soil layer, particulate organic matter is scattered on a plurality of interfaces, required oxygen is except the vertical diffusion from the face of land, main is to provide (Fig. 2) by hypertonicity oxygen supply layer, can quicken the decomposition of particulate organic matter greatly, keep the perviousness of soil.
2, side direction air passageways and highly permeable sublayer associating oxygen supply
The principle and the experimental study of soil biogeochemistry wastewater treatment show that all the ability that system supplies with oxygen to aeration zone is one of deciding factor that influences its waste water treatment efficiency.The oxygen requirement of sanitary wastewater is generally 500-1000mg/l, and the waste water treatment efficiency of conventional system is 0.01-0.05 ton/m
2/ day, its theoretical oxygen demand is 5-50g/m
2/ day, this is equivalent to the amount that topsoil absorbs oxygen.Bring up to 0.10 ton/m as the waste water treatment efficiency that will make system
2More than/the sky, it is far from being enough that the oxygen that provides from face of land diffusion only is provided, so we have invented side direction air passageways and highly permeable sublayer associating oxygen supply (Fig. 2).In this system, it mainly is the air passageways that relies on terminal to be communicated with the face of land that oxygen is supplied with, and passes ventilative wall, finishes by hypertonicity oxygen supply layer.This system not only can make the waste water treatment efficiency of system improve several times to tens times, even and since the inhomogeneous system that makes of aproll local ponding appears, also can obviously not influence the function of system, improved the stability of system.Five, embodiment
1, waste water passes aeration zone required time and waste water treatment efficiency: under the competent situation of the oxygen supply in aeration zone, decomposition organic in the waste water also needs the regular hour.Suppose that hydraulic gradient is 1, the saturation water penetrating power of aeration zone (saturated Darcy velocity) is w ton/m
2/ day, aeration zone thickness is h (rice), and the effective porosity of soil is x%, and then waste water passes the aeration zone required time and is under saturation conditions
The actual flow velocity of water is less than saturated flow velocity under the operate under unsaturated conditions, and promptly waste water can be longer in the time that aeration zone is detained.According to available data and experimental studies results, waste water should just can make waste water be purified greater than 6 hours (t＞0.25 day) in residence time of aeration zone.In actual applications, aeration zone can not be by water saturation, and promptly the waste water treatment efficiency of system (p) should be less than w ton/m
2/ day.P than w little what with waste water in organic concentration etc. all multifactor relevant.Our suggestion under any circumstance, p≤0.75w in the ordinary course of things, as t＜7 hour, p≤0.5w then; T＞12 hour, then p ≈ 0.75w.
2, the design of hypertonicity oxygen supply layer and oxygen delivery capacity thereof
In order to strengthen the oxygen supply function and to prevent to enter air passageways because of the capillary adsorption makes waste water, we are designed to intermediate thin with hypertonicity oxygen supply layer, and both sides (near air passageways) thick (Fig. 2), concrete grammar is that the bottom surface of oxygen supply layer is the plane, end face is a cambered surface.Preventing that soil from stopping up and to the dual function of aeration zone oxygen supply in order to give full play to the oxygen supply layer, the pedosphere thickness that we advise being used on the oxygen supply layer wastewater treatment is 15-20cm.
The about 285g/m of the aerial content of oxygen
3, the aerial spread coefficient of oxygen is 1.6m in the time of 10 ℃
2/ day.The average content of supposing oxygen in the hypertonicity oxygen supply layer of air is 100g/m
3, and up and down all in 0.5 meter scope, all be consumed (the actual concentrations gradient of oxygen should be bigger), then can be to aeration zone supply oxygen 260g/m
2/ day, increase 5-50 doubly than conventional system.
Owing to changed the oxygen supply mode, even ponding near water spraying pipe, occurs, can not produce obviously influence to the function of system yet, improved the stability of system greatly.The invention effect
As previously mentioned, waste water passes the aeration zone required time and is under the water saturation condition:
According to the The laboratory study on behavior of permeability result of Chinese radiation protection research institute to northern China loess, when hydraulic gradient is 1, w=0.04 ton/m
2During/sky, x=25.Though permeability coefficient is relevant with multiple factors such as Soil structures, in general, the relation of being proportionate between w and the x.Generally speaking, when w＞0.2, x＞30.If h=0.5 rice, w=0.3 ton/m
2/ day, x＞30 then, t＞12 hour.P that advises according to the front and the relation of t, the waste water treatment efficiency of this system surpasses 0.25 ton/m
2/ sky is fully possible.Suppose that the average wastewater discharge of certain biotope each household is 0.6 ton/day, then the wastewater discharge at 100 families is 60 tons/day.If the waste water treatment efficiency of soil system is 0.2 ton/m
2/ day, then need 300m
2Land area; If the waste water treatment efficiency of system is 0.3 ton/m
2/ day, then only need 200m
2Land area.The surface in these soils can be used for greening, road or court, even can be built on stilts downstairs parking stall etc.This all is feasible in many urban lifes sub-district.
The characteristics of industrial sewage are that wastewater discharge is bigger.Suppose that certain factory discharges 200 tons of trade effluents every day, through flocculation sediment or filtration, its oxygen requirement is 400g/l (being lower than sanitary wastewater), and the waste water treatment efficiency of the system of setting up departments is 0.25 ton/m
2/ day, required land area is 800m
2, being equivalent to the area (can build 2-3 less system) of a small-sized garden and a basketball court, this all is feasible in many cases.
Claims (2)
1, a kind of efficient anti-blocking soil organisms Waste Water Treatment, be to make waste water by in the pedosphere that is embedded in subterranean water spraying pipe and is distributed in the sufficient good penetrability of oxygen supply, it is characterized in that adopting and improve system architecture and improve organic rate of decomposition in the oxygen supply raising waste water, it mainly is the method that adopts multilayer transition interface anti-clogging plug and adopt air passageways and hypertonicity interlayer associating oxygen supply.
2,, it is characterized in that the method that this system adopts comprises the steps: according to the efficient anti-blocking soil organisms Waste Water Treatment described in the claim 1
1), adopts by gravel bed (3) → layer of sand (4) → sand layer (5) → soil layer (6) → be used for multilayered structure of the gravel bed (10) of draining, particulate organic matter is scattered on a plurality of interfaces, required oxygen is except the vertical diffusion from the face of land, main is to be provided by hypertonicity oxygen supply layer (7), can quicken the decomposition of particulate organic matter greatly, keep the perviousness of soil;
2), adopt side direction air passageways (8) and the associating oxygen supply of high infiltration oxygen supply layer (7), in this system, it mainly is the air passageways (8) that relies on terminal to be communicated with the face of land that oxygen is supplied with, and passes ventilative wall (9), finishes by hypertonicity oxygen supply layer (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031267610A CN1209298C (en) | 2003-06-05 | 2003-06-05 | High-effective block-resisting soil biological waste water treatment system |
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|---|---|---|---|
| CNB031267610A CN1209298C (en) | 2003-06-05 | 2003-06-05 | High-effective block-resisting soil biological waste water treatment system |
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| CN1460649A true CN1460649A (en) | 2003-12-10 |
| CN1209298C CN1209298C (en) | 2005-07-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415655C (en) * | 2006-09-29 | 2008-09-03 | 中国科学院广州地球化学研究所 | High hydraulic loading underground infiltration sewage treatment multiplex system |
| CN105766281A (en) * | 2016-03-07 | 2016-07-20 | 南开大学 | Ecological water permeable lawn for urban sponge body building |
-
2003
- 2003-06-05 CN CNB031267610A patent/CN1209298C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415655C (en) * | 2006-09-29 | 2008-09-03 | 中国科学院广州地球化学研究所 | High hydraulic loading underground infiltration sewage treatment multiplex system |
| CN105766281A (en) * | 2016-03-07 | 2016-07-20 | 南开大学 | Ecological water permeable lawn for urban sponge body building |
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| Publication number | Publication date |
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| CN1209298C (en) | 2005-07-06 |
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Owner name: LVTONG ENVIRONMENTAL PROTECTION ENGINEERING CO., L Free format text: FORMER OWNER: GUANGZHOU GEOCHEMISTRY INST., CHINESE ACADEMY OF SCIENCES Effective date: 20091225 |
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Effective date of registration: 20091225 Address after: Room 511, research building, No. 102 KELONG street, Guangzhou, Tianhe District Patentee after: Guangzhou green environmental protection engineering Co., Ltd. Address before: Guangdong city of Guangzhou province Tianhe District Wushan Bai Shi Gang Patentee before: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050706 Termination date: 20150605 |
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