CN101973626A - Microporous aerating variable-speed oxidation ditch - Google Patents
Microporous aerating variable-speed oxidation ditch Download PDFInfo
- Publication number
- CN101973626A CN101973626A CN2010105207325A CN201010520732A CN101973626A CN 101973626 A CN101973626 A CN 101973626A CN 2010105207325 A CN2010105207325 A CN 2010105207325A CN 201010520732 A CN201010520732 A CN 201010520732A CN 101973626 A CN101973626 A CN 101973626A
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- Prior art keywords
- oxidation ditch
- aerobic zone
- ditch
- oxygen
- speed change
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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
- C02F3/302—Nitrification and denitrification treatment
-
- 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
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1257—Oxidation ditches
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a microporous aerating variable-speed oxidation ditch which comprises a ditch body, an anoxic zone and an aerobic zone, wherein the ditch body is provided with a water inlet, a mud inlet and a water outlet, propellers are arranged in the anoxic zone, an aerator is arranged in the aerobic zone, the ditch body is divided into the anoxic zone and the aerobic zone which have different cross-sectional areas by a barrier, and the cross-sectional area of the aerobic zone is larger than that of the anoxic zone. Because of the continuity principle of water flow in the ditch, the flow speed in the aerobic zone is smaller than that in the anoxic zone, thereby forming the microporous aerating variable-speed oxidation ditch. With the increase of the width or depth of the aerobic zone, the cross-sectional area can be increased, and the flow speed in the aerobic zone can be reduced. In such a way, the speed variation amplitude of the variable-speed oxidation ditch can be increased, the quantity of the required propellers can be reduced and the energy consumption can be reduced.
Description
Technical field
The present invention relates to a kind of municipal effluent oxidation ditch treatment process, particularly a kind of micro-pore aeration speed change oxidation ditch is used for the reorganization and expansion of old oxidation ditch and newly-built.
Background technology
Oxidation ditch is one of main method of municipal sewage treatment.Existing oxidation ditch is the annular irrigation canals and ditches, in establish aeration and current thruster.When mixed solution when angle of rake promotion lower edge irrigation canals and ditches flow, in turn through the zone at aeration equipment place and the zone of no aeration equipment, formation aerobic zone and oxygen-starved area.After sewage and returned sluge entered oxidation ditch, the mixed solution of formation was during through the aeration zone, and the microorganism in the mud utilizes oxygen that aerator sends into the organic pollutant aerobic degradation in the sewage to be carried out simultaneously nitrated (with the ammonia oxidation in the water is NO
3 -); When mixed solution during through the oxygen-starved area, the NO that the microorganism in the mud utilizes aerobic stage to produce
3 -Carry out denitrification, with the degraded of the organism anoxic in the sewage, simultaneously with NO
3 -Be reduced to nitrogen.Aeration is equipped with surface aeration and micro-pore aeration.Surface aeration is by impeller or changes the rotation generation aproll effect of brushing, airborne oxygen is dissolved in the water; And micro-pore aeration is that the various forms of aeration heads of being made by corundum, rubber or other materials with microvoid structure (or dish) are set under water, when air enters aeration head by gas blower by pipeline, be cut and be separated into diameter, make airborne oxygen dissolve in purpose in the water quickly and efficiently thereby reach less than 1 micron small bubbles.Adopt the oxidation ditch of micro-pore aeration to be referred to as aerated oxidation ditch, be one of oxidation ditch comparatively commonly used at present.
Existing various oxidation ditch is divided into DE oxidation ditch, T oxidation ditch, Carousel oxidation ditch and Orbal oxidation ditch etc.Although the irrigation canals and ditches structure formation difference of various oxidation ditches, the oxygen-starved area in the same oxidation ditch, irrigation canals and ditches is all identical with the degree of depth with aerobic sector width, and therefore, mixed solution is at the flow velocity all identical (being referred to as the constant speed oxidation ditch) of oxygen-starved area and aerobic zone in the ditch.The mud in the mixed solution mixes preferably, contacts with water in the ditch in order to make, finish corresponding biochemical reaction, flow velocity in the oxidation ditch must be kept certain flow velocity (more than the 0.3m/s), the effect of carrying under one's arms by current, make the mud in the mixed solution be in suspended state, reach the purpose of mixing contact.Otherwise the mud in the mixed solution will precipitate and separate, and this also is that oxidation ditch must be provided with angle of rake reason place.
Aerobic zone in aerated oxidation ditch because the effect of aeration has formed mixed effect preferably, does not need as the oxygen-starved area, reaches the blended effect by flow velocity.Therefore, formed the waste of energy at the aerobic zone of constant speed oxidation ditch.
Summary of the invention
In order to overcome the energy wastage that aerobic zone flow velocity too high (identical with the oxygen-starved area) brings in the existing constant speed aerated oxidation ditch, the objective of the invention is to, a kind of micro-pore aeration speed change oxidation ditch is provided, this micro-pore aeration speed change oxidation ditch is by the width and the degree of depth of different sites in the same irrigation canals and ditches that change existing aerated oxidation ditch, regulate the cross-sectional area of irrigation canals and ditches, reach the effect of the flow velocity of different sites in the final adjusting ditch, form micro-pore aeration speed change oxidation ditch.Promptly under the situation of keeping the oxygen-starved area section, increase the aerobic zone cross-sectional area, the flow velocity of aerobic zone is reduced significantly, reduce the required impellent of flow in the ditch, promptly reduce the quantity that is provided with of impeller significantly, thereby reach the dual purpose that reduces construction investment and working cost.
In order to realize above-mentioned task, the technical solution that the present invention adopts is as follows:
A kind of micro-pore aeration speed change oxidation ditch, comprise ditch body, oxygen-starved area and aerobic zone, water-in and mud inlet and water outlet are arranged on the ditch body, thruster is arranged in the oxygen-starved area, aerating apparatus is arranged in the aerobic zone, it is characterized in that, described ditch body is divided into different oxygen-starved area of cross-sectional area and aerobic zone by dividing plate, wherein, the cross-sectional area of aerobic zone is greater than the cross-sectional area of oxygen-starved area.
Because the principle of continuity of current in ditch, the flow velocity of aerobic zone will be less than the flow velocity of oxygen-starved area, thereby forms the speed change oxidation ditch.Aerobic zone wide or big deeply more, cross-sectional area is big more, and the flow velocity of aerobic zone is more little, and the speed change amplitude of speed change oxidation ditch is big more, and required thruster quantity is just few more, and energy expenditure is just low more.
Compare with existing constant speed aerated oxidation ditch, after the present invention has adopted different form of fractures, the flow velocity of microporous aerated oxidation ditch aerobic zone reduces significantly, and the flow velocity in the oxidation ditch is to rely on the puopulsion unit that is arranged in the ditch to produce, flow velocity is high more, required thruster is many more, and the electric energy of consumption is also many more.Therefore, adopt the speed change oxidation ditch, can when keeping oxidation ditch inherent treatment effect and processing power, reduce construction investment (purchasing and install angle of rake quantity) and working cost (electric energy) significantly.
Description of drawings
Fig. 1 is the structural map of dark speed change oxidation ditch such as micro-pore aeration, and wherein (a) is orthographic plan, (b) is sectional drawing;
Fig. 2 is the structural map of the wide speed change oxidation ditch of micro-pore aeration, and wherein (a) is orthographic plan, (b) is sectional drawing;
Fig. 3 is the structural map with micro-pore aeration speed change oxidation ditch of two-stage anoxic and aerobic zone, and wherein (a) is orthographic plan, (b) is sectional drawing.
Label among the figure is represented respectively: 1, ditch body, 2, dividing plate, 3, the oxygen-starved area, 4, aerobic zone, 5, thruster, 6, aerating apparatus, 7, water-in, 8, mud inlet, 9, water outlet.Arrow among the figure is represented water (flow) direction, and alphabetical b represents width, and alphabetical h represents the degree of depth.
The present invention is described in further detail below in conjunction with drawings and Examples.
Embodiment
Referring to accompanying drawing, micro-pore aeration speed change oxidation ditch of the present invention, comprise ditch body 1, oxygen-starved area 2 and aerobic zone 3, water-in 7 and mud inlet 8 and water outlet 9 are arranged on the ditch body 1, thruster 5 is arranged in the oxygen-starved area 3, aerating apparatus 6 is arranged in the aerobic zone 4, ditch body 1 is divided into cross-sectional area different oxygen-starved area 3 and aerobic zone 4 by dividing plate 2, wherein, the cross-sectional area of aerobic zone 4 is greater than the cross-sectional area of oxygen-starved area 3.
The principle of work of micro-pore aeration speed change oxidation ditch of the present invention is: when the mud that is refluxed by second pond and sewage enter oxygen-starved area 3 in the ditch body 1 together by water-in 7 and mud inlet 8, mud and sewage mix at once with the mixed solution of oxygen-starved area 3, microorganism in the mud utilizes the organism in the water inlet that the nitrate reduction that oxygen-starved area in the ditch 3 produces is nitrogen, and self is oxidized to carbonic acid gas organism; When mixed solution passes through aerobic zone 4 in ditch, the oxygen that nitrifier in the mud utilizes aerobic zone 4 aerators to supply with is oxidized to nitrate with ammonia nitrogen, use for next cycle anoxic section, the heterotrophic bacterium in the mud utilizes oxygen to be oxidized to carbonic acid gas remaining organism in the mixed solution simultaneously.So move in circles.Pollutents such as organism in the sewage and ammonia nitrogen are removed, and reach the purpose of removing organism and ammonia nitrogen simultaneously.
In technique scheme, but aerobic zone 4 is identical with oxygen-starved area 3 degree of depth, the width difference, with this form etc. the dark speed change oxidation ditch of profound and subtle hole aeration (Fig. 1, among the figure, h
1=h
2, b
1B
2); But aerobic zone 4 is identical with oxygen-starved area 3 width, degree of depth difference, with this form wide micro-pore aeration speed change oxidation ditch (Fig. 2, among the figure, b
1=b
2, h
1〉=h
2); But aerobic zone 4 is all inequality with oxygen-starved area 3 degree of depth and width, forms to broaden with this to deepen micro-pore aeration speed change oxidation ditch; Also can be designed to aerobic zone 4 and oxygen-starved area 3(Fig. 3 of a plurality of serial or parallel connections), form combination micro-pore aeration speed change oxidation ditch, to satisfy different design requirementss.
Below be the embodiment that the contriver provides, need to prove that following embodiment is some more excellent examples, main purpose is to understand better the present invention, the invention is not restricted to these embodiment.
Embodiment 1:
Certain interim test factory adopts existing microporous aerated oxidation ditch method Treating Municipal Sewage, and the oxidation ditch volume is 20m
3, the volumetric ratio of aerobic zone and oxygen-starved area is 1:2, and flow velocity is identical, is 0.3m/s, and allocating power is 2 in the thruster of 100W.The municipal effluent COD concentration that enters the oxidation ditch treatment system is 200～300mg/L, total nitrogen 30～40mg/L.The COD concentration of handling the back water outlet is 20～30mg/L, total nitrogen 10～15mg/L.
Adopt profound and subtle hole aeration speed change oxidation ditch (Fig. 1) such as of the present invention that it is transformed, the volumetric ratio of aerobic zone 4 and oxygen-starved area 3 is 1:2, the flow velocity of oxygen-starved area 3 still maintains 0.3m/s, and the flow velocity of aerobic zone 4 is reduced to 0.1m/s, and thruster 5 is reduced to 1 by two.Treatment effect is preceding identical with transformation, has reached the purpose that reduces thruster quantity simultaneously and cut down the consumption of energy.
Embodiment 2:
Secondary microporous aerated oxidation ditch method Treating Municipal Sewage is adopted in certain sewage work's design, and the oxidation ditch volume is 4000m
3, the volumetric ratio of aerobic zone 4 and oxygen-starved area 3 is 1:3, and the flow velocity of aerobic zone and oxygen-starved area is identical in the ditch, is 0.3m/s, and allocating power is 4 in the thruster of 10KW.The municipal effluent COD concentration that enters the oxidation ditch treatment system is 200～300mg/L, total nitrogen 30～40mg/L.The COD concentration of handling the back water outlet is 20～30mg/L, total nitrogen 10～15mg/L.
Change into and adopt secondary micro-pore aeration speed change oxidation ditch of the present invention (Fig. 3), the volumetric ratio of aerobic zone 4 and oxygen-starved area 3 still is 1:3, the flow velocity of oxygen-starved area 3 still maintains 0.3m/s, and the flow velocity of aerobic zone 4 is reduced to 0.15 m/s, and thruster 5 is reduced to 2 by 4.Treatment effect is preceding identical with transformation, has reached the purpose that reduces thruster quantity simultaneously and cut down the consumption of energy.
Claims (5)
1. micro-pore aeration speed change oxidation ditch, comprise ditch body (1), oxygen-starved area (2) and aerobic zone (3), water-in (7) and mud inlet (8) and water outlet (9) are arranged on the ditch body (1), thruster (5) is arranged in the oxygen-starved area (3), aerating apparatus (6) is arranged in aerobic zone (4), it is characterized in that, described ditch body (1) is divided into different oxygen-starved area of cross-sectional area (3) and aerobic zone (4) by dividing plate (2), wherein, the cross-sectional area of aerobic zone (4) is greater than the cross-sectional area of oxygen-starved area (3).
2. micro-pore aeration speed change oxidation ditch as claimed in claim 1 is characterized in that, described oxygen-starved area (3) are identical with the degree of depth of aerobic zone (4), width difference, dark speed change oxidation ditch such as formation.
3. micro-pore aeration speed change oxidation ditch as claimed in claim 1 is characterized in that, described oxygen-starved area (3) are identical with the width of aerobic zone (4), and degree of depth difference forms wide speed change oxidation ditch.
4. micro-pore aeration speed change oxidation ditch as claimed in claim 1 is characterized in that, the degree of depth and the width of described oxygen-starved area (3) and aerobic zone (4) are all inequality, and forming broadens deepens the speed change oxidation ditch.
5. micro-pore aeration speed change oxidation ditch as claimed in claim 1 is characterized in that, described oxygen-starved area (3) and aerobic zone (4) are by plural serial stage or compose in parallel formation combination speed change oxidation ditch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105207325A CN101973626B (en) | 2010-10-27 | 2010-10-27 | Microporous aerating variable-speed oxidation ditch |
| PCT/CN2011/081165 WO2012055340A1 (en) | 2010-10-27 | 2011-10-24 | Microporous aerating speed-changing oxidation ditch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105207325A CN101973626B (en) | 2010-10-27 | 2010-10-27 | Microporous aerating variable-speed oxidation ditch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101973626A true CN101973626A (en) | 2011-02-16 |
| CN101973626B CN101973626B (en) | 2012-05-30 |
Family
ID=43573542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105207325A Expired - Fee Related CN101973626B (en) | 2010-10-27 | 2010-10-27 | Microporous aerating variable-speed oxidation ditch |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101973626B (en) |
| WO (1) | WO2012055340A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012055340A1 (en) * | 2010-10-27 | 2012-05-03 | 西安建筑科技大学 | Microporous aerating speed-changing oxidation ditch |
| CN102815789A (en) * | 2012-09-19 | 2012-12-12 | 陕西科技大学 | Oxidation ditch and denitrification operation method thereof |
| CN103663698A (en) * | 2013-12-27 | 2014-03-26 | 西安建筑科技大学 | Method and structure for holing and flow regime regulation without changes in tank shape of oxidation ditch |
| CN110746037A (en) * | 2019-09-29 | 2020-02-04 | 广西皖维生物质科技有限公司 | Pretreatment method of high-concentration organic wastewater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275722A (en) * | 1992-02-25 | 1994-01-04 | Beard Harold J | Oxidation ditch wastewater treatment and denitrification system |
| CN2415029Y (en) * | 2000-04-13 | 2001-01-17 | 广东省环境工程装备总公司 | Sewage treating device |
| CN201109746Y (en) * | 2007-09-21 | 2008-09-03 | 安徽国祯环保节能科技股份有限公司 | Annular zanjon oxidation ditch |
| CN201325907Y (en) * | 2008-12-17 | 2009-10-14 | 北京桑德环境工程有限公司 | Sewage treatment system for oxidation ditch |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60183096A (en) * | 1984-02-29 | 1985-09-18 | Nippon Kokan Kk <Nkk> | Treatment of waste water |
| US5861095A (en) * | 1997-04-09 | 1999-01-19 | Lemna Corporation | Method and device for treating wastewater |
| US20070289922A1 (en) * | 2006-06-15 | 2007-12-20 | Ladron De Guevara Cesar | Modular wastewater treatment system |
| CN101973626B (en) * | 2010-10-27 | 2012-05-30 | 西安建筑科技大学 | Microporous aerating variable-speed oxidation ditch |
-
2010
- 2010-10-27 CN CN2010105207325A patent/CN101973626B/en not_active Expired - Fee Related
-
2011
- 2011-10-24 WO PCT/CN2011/081165 patent/WO2012055340A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275722A (en) * | 1992-02-25 | 1994-01-04 | Beard Harold J | Oxidation ditch wastewater treatment and denitrification system |
| CN2415029Y (en) * | 2000-04-13 | 2001-01-17 | 广东省环境工程装备总公司 | Sewage treating device |
| CN201109746Y (en) * | 2007-09-21 | 2008-09-03 | 安徽国祯环保节能科技股份有限公司 | Annular zanjon oxidation ditch |
| CN201325907Y (en) * | 2008-12-17 | 2009-10-14 | 北京桑德环境工程有限公司 | Sewage treatment system for oxidation ditch |
Non-Patent Citations (2)
| Title |
|---|
| 《中国给水排水》 20011231 曹瑞钰等 改善氧化沟流速分布的措施 第16-18页 1-5 第17卷, 第2期 2 * |
| 《合肥工业大学学报(自然科学版)》 20050531 汤利华等 氧化沟动力配置的讨论 第494-496页 1-5 第28卷, 第5期 2 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012055340A1 (en) * | 2010-10-27 | 2012-05-03 | 西安建筑科技大学 | Microporous aerating speed-changing oxidation ditch |
| CN102815789A (en) * | 2012-09-19 | 2012-12-12 | 陕西科技大学 | Oxidation ditch and denitrification operation method thereof |
| CN103663698A (en) * | 2013-12-27 | 2014-03-26 | 西安建筑科技大学 | Method and structure for holing and flow regime regulation without changes in tank shape of oxidation ditch |
| CN110746037A (en) * | 2019-09-29 | 2020-02-04 | 广西皖维生物质科技有限公司 | Pretreatment method of high-concentration organic wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101973626B (en) | 2012-05-30 |
| WO2012055340A1 (en) | 2012-05-03 |
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Granted publication date: 20120530 Termination date: 20131027 |