CN102030410B - Improved magnetic powder high concentration activated sludge process for sewage treatment - Google Patents
Improved magnetic powder high concentration activated sludge process for sewage treatment Download PDFInfo
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- CN102030410B CN102030410B CN2010105434085A CN201010543408A CN102030410B CN 102030410 B CN102030410 B CN 102030410B CN 2010105434085 A CN2010105434085 A CN 2010105434085A CN 201010543408 A CN201010543408 A CN 201010543408A CN 102030410 B CN102030410 B CN 102030410B
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- magnetic powder
- magnetic
- activated sludge
- sludge
- high concentration
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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
Abstract
The invention provides an improved process without entering of the magnetic powder into a biochemical system based on the existing magnetic powder high concentration activated sludge process, aiming at solving the problems of potential sedimentation and the like caused by the entering of the magnetic powder into the biochemical system. The process is characterized by using a magnetic powder separator to recover the magnetic powder in the returned sludge and in the excess sludge. The invention has the beneficial effects that the activated sludge well combined with the magnetic powder of large specific gravity has excellent sedimentation performance, a sedimentation basin can stably maintain the high concentration activated sludge in the biochemical system, and the removing effect of pollutants is excellent. The magnetic powder in the return sludge is recovered into a mixing tank and the sedimentation basin, therefore the magnetic powder can not enter the biochemical system, thereby avoiding the sedimentation of the magnetic powder. The process provided by the invention has the advantages that no strong stirring is needed and the energy is saved. The magnetic powder in the excess sludge is also recovered, the operator just needs to replenish the lost magnetic powder instead of adding a great quantity of magnetic powder, thereby obviously reducing the cost. Since a small quantity of flocculants are added continuously or intermittently, so that the activated sludge can be well combined with the magnetic powder, thereby ensuring the excellent sedimentation performance of the sludge.
Description
Technical field
The present invention relates to a kind of improved magnetic powder high concentration activated sludge treatment process that is used for WWT; Can be used for municipal sewage treatment or similar Industrial Wastewater Treatment; Have the advantages that to keep high-concentration activated sludge than the magnetic of great (more than 4), reach the effect that significantly improves processing power (particularly the degree of depth is denitrogenated in short-term) through adding.
Background technology
The magnetic powder high concentration activated sludge treatment process is the basis of technology of the present invention.This technology has the characteristics of activated sludge concentration height (6-12g/L), Aerobic Pond dissolved oxygen concentration low (below the 2mg/L), hydraulic detention time short (8.32h); Under water inlet total nitrogen 47.85mg/L condition; The water outlet total nitrogen is 6.13mg/L only; Actual nitrogen removal rate reaches 86.99%, even has substantially exceeded desirable nitrogen removal rate 79.20%, obviously reaches the international leading level.This technology also has fabulous removal effect to other pollutent.
The limitation of magnetic powder high concentration activated sludge treatment process is that magnetic is present among the biochemical system, under the agitation condition of general biochemical treatment, is difficult to suspend; Need powerful the stirring; So energy consumption is higher, and magnetic is deposited in the biochemical system normal operation of influence and treatment effect easily.
Summary of the invention
The object of the invention in order to overcome the above-mentioned deficiency of prior art, is confined to be in settling tank and the mixing pit major technique means with magnetic just; Avoid magnetic to get into biochemical system; Thereby need not powerful the stirring, energy efficient, and avoid the magnetic deposition; For the abundant adjusting of biochemical system creates conditions, guarantee the normal operation and the treatment effect of biochemical system.
The technical scheme that the present invention adopts is: add magnetic at mixing pit; Utilize the magnetic separating device to reclaim the magnetic in returned sluge and the excess sludge; The magnetic that reclaims with get into settling tank once more after mixed solution mixes, magnetic only is confined in settling tank and the mixing pit, magnetic no longer gets into biochemical system.
The present invention is the basis with the magnetic powder high concentration activated sludge treatment process, and difference is that the active sludge in the biochemical system does not contain magnetic, and the active sludge that only gets in the settling tank through mixing pit contains magnetic.
Biochemistry pool adopts " oxygen of holding concurrently is aerobic " combination, and aerobic area and aerobic zone respectively are divided into two sections of front and back, and activated sludge concentration (not counting magnetic) is controlled at more than the 6g/L, and aerobic leading portion dissolved oxygen concentration is controlled at about 1mg/L,
Water inlet sewage mixes the formation mixed solution with backflow mixed liquor and returned sluge; Oxygen leading portion, hold concurrently oxygen back segment, aerobic leading portion and the aerobic rear end of holding concurrently of flowing through successively; In double oxygen leading portion and double oxygen back segment, carry out denitrification, in aerobic leading portion, carry out synchronous nitration and denitrification, in aerobic back segment, carry out nitrated.Mixed solution gets into mixing pit at last to be mixed with flocculation agent and magnetic, gets into settling tank again and carries out solid-liquid separation, discharges primary water.Returned sluge and excess sludge all reclaim magnetic through magnetic separating apparatus.Establish the mixed solution internal reflux in the biochemical system in addition.
The invention has the beneficial effects as follows: fabulous with the activated sludge settling property of heavy magnetic good combination, the high-concentration activated sludge that settling tank can the stable maintenance biochemical system.Magnetic in the returned sluge utilizes magnetic separator to reclaim, so magnetic does not get into biochemical system, avoids magnetic in biochemical system, to deposit, and need not powerful the stirring, energy efficient, the normal operation and the treatment effect of assurance biochemical system.Magnetic in the excess sludge utilizes magnetic separator to reclaim, so need not add magnetic in a large number, only needs to replenish the magnetic that runs off, and significantly reduces cost.Add small amount of flocculant continuously or intermittently, active sludge is combined well with magnetic, and introduced chemical enhanced dephosphorization, water outlet can be stablized reach one-level A standard-required comprehensively.
The present invention can be widely used in all municipal sewage plants; Treatment effect is fabulous, can reach high total nitrogen removal effect, removes ammonia nitrogen, total phosphorus and other pollutent simultaneously quite effectively; Magnetic does not get into biochemical treatment system, does not influence the operation and the adjusting of biochemical treatment; Need not powerful the stirring, aeration rate is less, and the magnetic magnitude of recruitment is less, and flocculant dosage is less, practices thrift running cost; The residence time is short, practices thrift construction investment, and is convenient to the existing utility transformation.
Description of drawings
Fig. 1, process flow sheet of the present invention.
Embodiment
1. adopt the operation scheme of magnetic powder high concentration activated sludge treatment process; Be the high (6-12g/L of activated sludge concentration; Do not count magnetic), aerobic leading portion dissolved oxygen concentration low (about 1mg/L), hydraulic detention time short (6.50-8.32h); Adopt settling tank, biochemistry pool adopts " oxygen of holding concurrently is aerobic " combination.
2. the disposable magnetic that adds in mixing pit, and add small amount of flocculant continuously or intermittently.
3. the magnetic in the returned sluge utilizes the magnetic separator to reclaim, and magnetic gets into mixing pit and reuses, and returned sluge is back to the oxygen leading portion of holding concurrently.
4. the magnetic in the excess sludge utilizes the magnetic separator to reclaim, and magnetic gets into mixing pit and reuses, and excess sludge enters sludge treating system.
5. a small amount of loss of magnetic is inevitably, if magnetic is not enough because of loss, then to mixing pit small amount of supplemental magnetic.
Claims (3)
1. improved magnetic powder high concentration activated sludge sewage treatment process, it is characterized in that: magnetic does not get into biochemistry pool; Between biochemistry pool and settling tank, mixing pit is set, the initial stage disposablely adds magnetic and follow-up small amount of supplemental magnetic therein, and adds flocculation agent continuously; Utilize the magnetic separating device to retrieve the returned sluge in autoprecipitation pond and the magnetic in the excess sludge, the magnetic of recovery get into mixing pit and with get into settling tank again after mixed solution mixes, returned sluge is got back to biochemistry pool, excess sludge is discharged to sludge treating system; Biochemistry pool adopts " oxygen of holding concurrently is aerobic " combination, and aerobic area and aerobic zone are divided into two sections of front and back, between aerobic back segment and the double oxygen leading portion mixed solution internal reflux are set.
2. a kind of improved magnetic powder high concentration activated sludge sewage treatment process according to claim 1, it is characterized in that: the activated sludge concentration of biochemistry pool is controlled at more than the 6g/L.
3. a kind of improved magnetic powder high concentration activated sludge sewage treatment process according to claim 1, it is characterized in that: the dissolved oxygen concentration of aerobic leading portion is controlled at 1mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010105434085A CN102030410B (en) | 2010-11-15 | 2010-11-15 | Improved magnetic powder high concentration activated sludge process for sewage treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105434085A CN102030410B (en) | 2010-11-15 | 2010-11-15 | Improved magnetic powder high concentration activated sludge process for sewage treatment |
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| Publication Number | Publication Date |
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| CN102030410A CN102030410A (en) | 2011-04-27 |
| CN102030410B true CN102030410B (en) | 2012-05-30 |
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| CN2010105434085A Expired - Fee Related CN102030410B (en) | 2010-11-15 | 2010-11-15 | Improved magnetic powder high concentration activated sludge process for sewage treatment |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627375A (en) * | 2012-04-01 | 2012-08-08 | 北京工业大学 | Integrated treatment method and integrated treatment device for polluted river and lake water |
| CN103265110A (en) * | 2013-05-10 | 2013-08-28 | 李继香 | Water treatment method using magnetically biologically enhanced membrane bioreactor |
| CN103341403B (en) * | 2013-07-11 | 2016-04-13 | 北京精瑞科迈净水技术有限公司 | The super magnetic separator that a kind of magnetic reclaims and the super magnetic separation system that magnetic reclaims |
| CN105540987A (en) * | 2015-12-31 | 2016-05-04 | 青岛太平洋化工装备有限公司 | Water deep purification method |
| CN105399288B (en) * | 2015-12-31 | 2018-01-05 | 青岛太平洋化工装备有限公司 | A kind of biological method for treating waste water |
| CN106396271B (en) * | 2016-10-27 | 2019-03-15 | 环境保护部华南环境科学研究所 | A method of improving activated sludge settling property |
| CN112358035A (en) * | 2020-06-09 | 2021-02-12 | 青岛颐和水务有限公司 | Carrier biological enhanced sewage treatment process |
| CN111847606A (en) * | 2020-07-21 | 2020-10-30 | 北京精瑞科迈净水技术有限公司 | Magnetic powder wet-type adding system and method |
| CN111892229B (en) * | 2020-07-31 | 2021-05-14 | 江苏启创环境科技股份有限公司 | Method for deeply purifying and efficiently recovering trace phosphorus in biochemical tail water |
| CN112897820A (en) * | 2021-03-30 | 2021-06-04 | 三亚易可霖环保科技有限公司 | Equipment and method for treating sewage by talcum powder high-concentration activated sludge process |
| CN115259356A (en) * | 2022-07-22 | 2022-11-01 | 三亚易可霖环保科技有限公司 | Improved talcum powder high-concentration activated sludge process sewage treatment equipment and method thereof |
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| JPH09150180A (en) * | 1995-12-01 | 1997-06-10 | Ishikawajima Harima Heavy Ind Co Ltd | Activated sludge recovering device and method thereof |
| JPH1043786A (en) * | 1996-07-30 | 1998-02-17 | Ishikawajima Harima Heavy Ind Co Ltd | Aeration tank |
| CN101798141A (en) * | 2009-07-09 | 2010-08-11 | 北京精瑞科迈净水技术有限公司 | Magnetic powder high concentration activated sludge treatment method for sewage treatment |
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