CN1281518C - Sewerage treatment method by using precoated dynamic membrane to filter mixed liquor of activated sludge - Google Patents
Sewerage treatment method by using precoated dynamic membrane to filter mixed liquor of activated sludge Download PDFInfo
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- CN1281518C CN1281518C CNB2004100212815A CN200410021281A CN1281518C CN 1281518 C CN1281518 C CN 1281518C CN B2004100212815 A CNB2004100212815 A CN B2004100212815A CN 200410021281 A CN200410021281 A CN 200410021281A CN 1281518 C CN1281518 C CN 1281518C
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- dynamic membrane
- precoating
- precoated
- filter
- precoated dynamic
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- 239000012528 membrane Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000010802 sludge Substances 0.000 title claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000000429 assembly Methods 0.000 claims abstract description 21
- 230000000712 assembly Effects 0.000 claims abstract description 21
- 239000010865 sewage Substances 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 14
- 239000004744 fabric Substances 0.000 claims abstract description 11
- 239000003973 paint Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 4
- 238000005201 scrubbing Methods 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 230000004907 flux Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract 2
- 239000002245 particle Substances 0.000 abstract 2
- 231100000719 pollutant Toxicity 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000007791 liquid phase Substances 0.000 abstract 1
- 238000005273 aeration Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- 244000005700 microbiome Species 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002207 metabolite Substances 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000003206 sterilizing agent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- 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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- Activated Sludge Processes (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention belongs to the technical field of sewage treatment and reclaimed water recycles in environmental engineering. The present invention is characterized in that industrial filter cloth is made into filter assemblies; a dynamic membrane is formed on the surface of the industrial filter cloth by a precoating method to improve filter performance; the dynamic membrane precoated assemblies are fixed on a framework and are arranged in a bioreactor to drain water under the action of a suction pump. The present invention has the advantages that the filter assemblies made of the industrial filter cloth have low cost; the dynamic membrane with absorbing and retaining effects on pollutants can guarantee the safety and the reliability of effluent water quality and can simultaneously prevent the pollutants and microbes from diffusion to the surfaces and the internal parts of the fibers of the filter cloth to relieve the pollution degree of the filter cloth; the particle of a precoating agent has large particle size and the formed dynamic membrane has high porosity, low condensibility and strong liquid phase permeation so as to delay the enhancement of operation pressure; the dynamic membrane precoated assemblies is just scrubbed after being polluted and flux can restore without chemical reagent consumption.
Description
Technical field
The invention belongs to field of environment engineering technology, relate to sewage disposal and technology of middle water recycle, particularly use the sewage water treatment method of precoated dynamic membrane filter activity mud mixed liquid.
Background technology
China is one of 13 poor-water states in the world, a lack of water surplus in the of existing 400 in the city surplus in the of 600, because of the industrial output value that lack of water reduces annual above 1,200 hundred million yuan.Use water quality and the water price middle water low than Drinking Water is afforested, carwash, flushing sanitation utensil etc., water resources that can saves valuable relaxes the imbalance between supply and demand of municipal water, also can reduce the burden of sewerage system.Membrane bioreactor (membrane bioreactorMBR) is considered to one of the most rising wastewater treatment and reuse technology, itself can substitute three technologies in activated sludge tank, second pond, filter tank in the traditional wastewater processing, water outlet only need add a small amount of sterilizing agent (avoiding taking place secondary pollution) just can realize reuse, and sludge yield is low, floor space is little, and is easy to operate.But the technical feasibility of self is not only depended in a kind of widespread use of technology, also depends on its economic feasibility, and it is to hinder the subject matter that MBR applies that membrane module costs an arm and a leg wayward with the film pollution.Treatment scale is 240m
3In the reusing sewage system of/d, it is 57.3% that the film imported component costs of integral type film biological reactor accounts for the gross investment ratio, and the replacement charge of film accounts for 58% of working cost, and power charge accounts for 21% of working cost; Pollute for delaying film, about 40: 1, the energy consumption of aeration accounts for more than 96% of power charge to the membrane biological reactor process gas-water ratio usually.
For reducing the price of membrane module, it is that the Dynamic Membrane of utilizing microorganism and meta-bolites thereof to form on the bolting silk of 100 μ m is filtered that Tsing-Hua University is devoted to study in the aperture.The result shows, system to total clearance of COD basically greater than 80%, but, the Dynamic Membrane surface contamination is serious, and is to avoid the too high below aeration that carries out of working pressure can make the Dynamic Membrane completely destroy, and water outlet SS on average reaches 2270mg/l, Dynamic Membrane just can form again behind the 35min, therefore needing increases the device that the water outlet in for some time behind the aeration of below is returned processing, also having problems aspect effluent quality and the system operation stability, also has gap apart from practical application.People such as Kiso find under the working pressure less than 1KPa, non-woven fabrics can carry out the separation of active sludge effectively, and it is little with the membrane bioreactor gap aspect the removal of pollutents such as turbidity, organism, but not good to colibacillary removal effect, the surface contamination phenomenon is much more serious than membrane bioreactor.
Summary of the invention
The purpose of this invention is to provide a kind of sewage water treatment method of using precoated dynamic membrane filter activity mud mixed liquid, its required device is called precoated dynamic membrane-bio-reactor.The novel sewage water treatment method of this kind not only has all advantages of membrane bioreactor, and can fundamentally solve problems such as the high and film pollution of the membrane module cost of yoke membrane bioreactor wide popularization and application is wayward.
The technical scheme that realizes the sewage water treatment method of application precoated dynamic membrane filter activity mud mixed liquid of the present invention is:
Adopt industrial filter cloth parcel rigidity square frame to form filter assemblies, water outlet is left on filter assemblies top; Suction force causes the surface depression when avoiding water outlet, and the built-in iron wire frame of assembly supports.Add precoating paint in the precoating pond of splendid attire clear water, precoating paint adopts Powdered Activated Carbon, diatomite or kaolin, stir it is mixed, and suction pump suction water outlet, water outlet is circulated back to the precoating pond.Under the force action of shearing force and the normal force that caused by suction, precoating paint is attached to the filter assemblies surface gradually, and forms uniform precoated dynamic membrane, and the precoating process takes 20-30min, precoated dynamic membrane thickness 1-3mm.
Single precoated dynamic membrane assembly flux maintains 40-80L/hm
2Between, be convenient to unpick and wash filtration area≤4m for guaranteeing that precoated layer is all even
2, the precoated dynamic membrane number of components is determined divided by the product of single membrane module flux and filtration area by handling the water yield in the bio-reactor.After the filter assemblies precoating, be fixed on the framework, framework places bio-reactor, and makes active sludge intermixture flood framework.Framework upper is across a total header, the precoated dynamic membrane assembly be arranged in parallel by vertical direction, inter-module is every suitable distance, rising pipe is connected with total header, sewage filters through active sludge degraded and precoated dynamic membrane, under the suction pump effect, enter the inside of membrane module hollow, discharge by total header.Aerated conduit is settled in the bio-reactor bottom, and middle bubble aeration head is arranged on the pipeline, and aeration produces shearing force, delays pollution substance and accumulates at the precoated dynamic membrane assembly surface.Slideway is set in the bio-reactor, is convenient to the extraction of framework, the precoated dynamic membrane assembly can be pulled down separately after polluting, and after scrubbing, places the precoating of precoating pond, can be reentered in the bio-reactor and filter.The precoating pond is the rectangle pond, can hold filter assemblies and stirrer, and makes clear water flood filter assemblies to get final product, do not have the restriction of hydraulic detention time.Handle sanitary sewage COD concentration when 300-500mg/l, hydraulic detention time is not less than 6 hours in the bio-reactor; Handle sanitary sewage COD concentration when 600-1000mg/l, hydraulic detention time is not less than 8 hours in the bio-reactor.The bio-reactor volume satisfies the hydraulic detention time requirement simultaneously, and active sludge intermixture must flood the precoated dynamic membrane component framework.
Effect of the present invention and benefit are: precoated dynamic membrane has absorption and crown_interception to pollution substance, when further improving filtering accuracy, can prevent that pollution substance and microorganism to industrial filter cloth fiber surface and internal divergence, alleviating the industrial filter cloth pollution level; And precoating paint self grain diameter Dynamic Membrane porosity height, compressibility big, that form is little, has stronger liquid infiltration performance, thereby delays the raising of working pressure; Precoated dynamic membrane is easy to from the filter cloth surface isolation, and precoating paint can make flux obtain more effective recovery together with adsorbed pollution substance and microbial metabolites wash-out together during cleaning; Industrial filter cloth is cheap and easy to get, 10-15 unit/m
2Price and 500 yuan/m of hollow-fibre membrane
2Price greatly differ from each other, thereby can reduce cost significantly; The precoated dynamic membrane assembly pollutes the back only need be scrubbed, and flux just can recover, and need not consume chemical reagent.
Precoated dynamic membrane-biological reactor process effluent quality of using precoated dynamic membrane filter activity mud mixed liquid can satisfy middle water reuse requirement, and can be used to carwash, afforest and flush the toilet, and also with low cost, simple to operate.Precoated dynamic membrane-bio-reactor is with a wide range of applications in sewage disposal and middle water reuse field, as: the area of no sewerage pipeline network, as holiday resort, travelling scenery district; Area or place that middle water reuse demand is arranged are as hotel, car wash trade; The renewal upgrading of existing municipal sewage plant etc.
Description of drawings
Accompanying drawing 1 is a bio-reactor part synoptic diagram in precoated dynamic membrane-biological reactor process.
Among the figure: 1 gas blower; Bubble aeration device in 2; 3 precoated dynamic membrane assemblies; 4 frameworks; 5 bio-reactors; 6 vacuum meters; 7 tensimeters; 8 suction pumps.
Accompanying drawing 2 is precoating pond part synoptic diagram in precoated dynamic membrane-biological reactor process.
Among the figure: 9 precoating ponds; 10 filter assemblies; 11 stirrers; 12 suction pumps.
Embodiment
Below in conjunction with technical scheme and accompanying drawing, describe the specific embodiment of the invention in detail.
Embodiment
Handle the sanitary sewage water yield and press 45m
3/ d meter, COD concentration is 600mg/l.Single precoated dynamic membrane assembly flux maintains 80L/hm
2, filtration area is 3m
2, the single face area is 1.5m
2, specifically be of a size of: high 1.5m, long 1.0m, then calculating needs 8 of filter assemblies.Get single filter assemblies and place precoating pond 9, splendid attire clear water in the pond, and add precoating paint, precoating paint adopts Powdered Activated Carbon.Precoated dynamic membrane thickness is by 1mm, and then each filter assemblies needs precoating paint 3L.Open stirrer 11 precoating paint is mixed, suction pump 12 suction water outlets, water outlet is circulated back to precoating pond 9.Circulated 25 minutes, and formed uniform precoated dynamic membrane on the filter assemblies surface.
8 precoated dynamic membrane assembly 3 parallel being installed in the framework 4, the rising pipe of precoated dynamic membrane assembly is connected with the total header in framework top, and framework is put into bio-reactor 5 along slideway, and active sludge intermixture floods framework 4 in the bio-reactor.Start gas blower 1 aeration, produce shearing force, when delaying the film pollution, for microorganism in the reactor provides growth metabolism essential oxygen.Under suction pump 8 effects, enter the inside of precoated dynamic membrane assembly hollow through active sludge degraded and the filtering treating water of precoated dynamic membrane, discharge from total header.Can pull down separately after precoated dynamic membrane assembly 3 pollutes, after scrubbing, place 9 precoatings of precoating pond, can be reentered in the bio-reactor 5 and filter.Hydraulic detention time is 8 hours in the bio-reactor, and useful volume is 15m
3, the biological respinse implement body is of a size of: long 2m, and wide 3m, available depth 2.5m, superelevation 0.5m, height overall are 3.0m.
Claims (3)
1. sewage water treatment method of using precoated dynamic membrane filter activity mud mixed liquid is characterized by:
A) form filter assemblies, single filter assemblies filtration area≤4m with filter cloth parcel rigidity square frame
2:
B) get single filter assemblies and place the precoating pond, and make suction pump connect the filter assemblies water outlet; Add precoating paint in the precoating pond of splendid attire clear water, precoating paint adopts Powdered Activated Carbon, diatomite or kaolin; Stirrer places the precoating pond, opens stirrer precoating paint is mixed; Suction pump suction water outlet, water outlet is circulated back to the precoating pond; Under the force action of shearing force and the normal force that caused by suction, the filter assemblies surface forms precoated dynamic membrane; The precoating process is 20-30min, precoated dynamic membrane thickness 1-3mm;
C) the precoated dynamic membrane assembly be arranged in parallel by vertical direction, is fixed on the framework, and framework places bio-reactor, and makes active sludge intermixture flood framework; Precoated dynamic membrane assembly rising pipe is connected with the total header in framework top, and sewage filters through active sludge degraded and precoated dynamic membrane, is discharged by total header under the suction pump effect.
2. a kind of sewage water treatment method of using precoated dynamic membrane filter activity mud mixed liquid according to claim 1, it is characterized by: the precoated dynamic membrane assembly can be pulled down separately after polluting, after scrubbing, place the precoating of precoating pond, be reentered in the bio-reactor and filter.
3. a kind of sewage water treatment method of using precoated dynamic membrane filter activity mud mixed liquid according to claim 1 is characterized by: slideway is set in bio-reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100212815A CN1281518C (en) | 2004-04-09 | 2004-04-09 | Sewerage treatment method by using precoated dynamic membrane to filter mixed liquor of activated sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100212815A CN1281518C (en) | 2004-04-09 | 2004-04-09 | Sewerage treatment method by using precoated dynamic membrane to filter mixed liquor of activated sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1562801A CN1562801A (en) | 2005-01-12 |
| CN1281518C true CN1281518C (en) | 2006-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100212815A Expired - Fee Related CN1281518C (en) | 2004-04-09 | 2004-04-09 | Sewerage treatment method by using precoated dynamic membrane to filter mixed liquor of activated sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101746848B (en) * | 2008-12-12 | 2012-05-23 | 同济大学 | Dynamic film separating method for processing sewage by using biological diatomite |
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| CN100368316C (en) * | 2006-02-17 | 2008-02-13 | 南京工业大学 | High-flux flexible bionic dynamic membrane assembly and manufacturing method and application thereof |
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| CN101555047B (en) * | 2008-04-08 | 2011-04-20 | 曹达文 | Dynamic membrane support body and component for realizing water supply/sewage water treatment |
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| CN102288525B (en) * | 2011-05-09 | 2013-07-24 | 中国科学技术大学苏州研究院 | Device and method for testing filtration resistance of coarse mesh filtration membrane in dynamic membrane bioreactor |
| CN102580379B (en) * | 2012-03-13 | 2014-05-28 | 上海同臣环保科技有限公司 | Filter tank |
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| CN111792742B (en) * | 2019-09-29 | 2022-05-17 | 中国科学院生态环境研究中心 | Method for strengthening anti-pollution capacity of nanofiltration membrane through multistage collaborative filtration |
| CN110981090B (en) * | 2019-12-10 | 2022-02-11 | 煤科集团杭州环保研究院有限公司 | Coal mine industry square domestic sewage treatment device and method |
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2004
- 2004-04-09 CN CNB2004100212815A patent/CN1281518C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101746848B (en) * | 2008-12-12 | 2012-05-23 | 同济大学 | Dynamic film separating method for processing sewage by using biological diatomite |
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| CN1562801A (en) | 2005-01-12 |
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