CN1800061A - Process for facilitating sludge decrement - Google Patents
Process for facilitating sludge decrement Download PDFInfo
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- CN1800061A CN1800061A CNA2005101229358A CN200510122935A CN1800061A CN 1800061 A CN1800061 A CN 1800061A CN A2005101229358 A CNA2005101229358 A CN A2005101229358A CN 200510122935 A CN200510122935 A CN 200510122935A CN 1800061 A CN1800061 A CN 1800061A
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- sludge
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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
- Y02W10/20—Sludge processing
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Abstract
The invention relates to a excess sludge decrement processing technique. The technical project in said invention is to apply acoustic field to sludge disposal process to come up to the aim of accelerating sludge dewatering, anaerobic digesting and sludge decrement finally. The excess sludge in petrochemical factory is concentrated for 24h (the sludge moisture percentage is 96%~98%), radiated by proper ultrasonic field and then divided into two paths: Firstly, add flocculating agent directly, dewater, fill; secondly, add flocculating agent and dewater after the sludge enters anaerobic digestion devices and most of the organic substances in sludge is digested. The invention decreases the volume of sludge and concentration of organic substances in sludge, reduces the pressure of handling excess sludge.
Description
Technical field
The present invention relates to a kind of Technology that promotes the dehydration of wastewater treatment plant excess sludge, anaerobic digestion, relate in particular to the Technology that ultrasonic field is used for the dehydration of petrochemical plant excess sludge, anaerobic digestion.
Background technology
Along with popularizing of petrochemical complex, oil refining sewerage biological treatment, the final processing of excess sludge has become current ten minutes distinct issues.In recent years, because country is more and more higher to the environment attention degree, pollutant emission standard is increasingly stringent also.The excess sludge that city domestic sewage produces can be used as compost; Petrochemical plant mud does not allow simple landfill or farmland utilization owing to contain hazardous and noxious substances.China's municipal effluent annual emissions is 41,400,000,000 m at present
3, the second-stage treatment rate reaches 15%, and the mud generation is about 1,500 ten thousand tons of every year (by water ratio 97%).According to the minimizing planning of China municipal sewage plant, 2010, China's municipal sewage treatment amount and processing rate all will increase, and the mud annual production also will be increased to present 5 times.
Because the effect of acoustic cavitation, ultrasonic pretreatment can produce phonochemical reaction, strengthens the bio-transformation of organic moiety, accelerates cytolysis.When being used for the mud return-flow system, can strengthen the cell resolvability, reduce sludge yield; When being used for device for dehydrating sladge waste, can reduce the content of combination water in the mud, help sludge dewatering, mud decrement and finally reduce processing costs.Ultrasound-enhanced anaerobic degradation sewage sludge can reduce fermentation time.
Ultrasonic technology is subjected to people just day by day as a kind of new Pollution abatement technology and payes attention to, and it is demonstrating great potential aspect enhanced sewage sludge treatment machine poisonous and harmful and the organic wastewater with difficult degradation thereby processing.
Relate to ultrasonic sound field and handle the research of mud, domestic have one piece of patent: the Chinese utility model patent CN2702992Y on June 1st, 2005.It is a kind of ultrasonic sludge disintegration device, import, outlet are arranged respectively at entire body top, the bottom of this device, cylindrical shell connection ultra-sonic generator suitable for reading, the ultrasound tube that connects ultra-sonic generator is positioned at cylindrical shell, be connected with ultrasound probe in the ultrasound tube, cylindrical shell is arranged with several and is positioned at casing, and previous outlet is communicated with by sludge carrier pipe with back one import, under the casing bearing is arranged.This patent has been described a kind of mud ultrasonic disintegration device, only is a kind of description of apparatus-form, and final process result is that mud is broken, and does not relate to the content that relevant sludge treatment technique aspect and sludge dewatering, anaerobic digestion etc. are handled eventually.
Refinery or oilfield sump oil dehydration new technology, application number: 200510094267.2, adopt the supersound process sump oil, moisture sump oil was through ultrasonication 2～30 minutes, and ultrasonic frequency is 5kHz～100kHz; The uniprocessing that moisture sump oil can be made up of one group of ultrasonic device and hot slurry tank also can be adopted secondary or multiple-stage treatment.Its technical scheme is: make the water droplet coalescence in the sump oil and realize oily water separation by hyperacoustic capable ripple or standing wave effect, at the clear and definite dehydration treatment method and the industrial realization mode of high aquosity proposition of sump oil.Though this new technology also adopts ultrasonic technique to be used for dirty oil dewatering, but it and process object of the present invention are different, the principle of ultrasonication is also different, and ultransonic effect is the content that reduces combination water in the excess sludge among the present invention, thus the dewatering of strengthening subsequent; Suitable in addition ultrasonication can make sludge crushing, improves the activity of anerobe, promotes anaerobic sludge digestion, thereby improves the dewatering of digested sludge.
Summary of the invention
The present invention has proposed a kind of novel process that ultrasonic field and sludge treatment technique are combined and use for the handling problems that solves municipal wastewater treatment plant and petrochemical plant residual active sludge, improve, strengthen existing sludge dewatering, anaerobic digestion process, promote the petrochemical plant excess sludge reduction, satisfy the needs of petrochemical plant sewage disposal and environmental protection.
Technical scheme of the present invention reaches the purpose that promotes sludge dewatering and subsequent anaerobic digestion for ultrasonic field and sludge treatment technique are combined.A kind of excess sludge reduction Technology that promotes the dehydration of wastewater treatment plant excess sludge, anaerobic digestion is characterized in that excess sludge after concentrating, and through uniform reverberation ultrasonic field pretreater processing, enters flocculation, pressure-filtering process then earlier; Perhaps earlier enter flocculation, pressure-filtering process again through anaerobic digestion.The excess sludge that is petrochemical plant earlier through suitable ultrasonic field irradiation, is divided into two lines through concentrate (moisture percentage in sewage sludge is 96%～98%) about 24h then, and the one, directly add flocculation agent, dehydration, landfill or burning; The 2nd, enter anaerobic digestion device, most of organism digest and decompose is fallen, and then added flocculation agent, processed reaches purpose at the bottom of the sludge reduction.
Wherein ultrasonic processor comprises ultra-sonic generator, ultrasonic transducer and treatment tank; The treatment tank bottom is equipped with ultrasound transducer array; Ultrasonic transducer is piezoelectric ceramic ultrasound transverter or ultrasonic magnetostrictive transverter; The sounding effect of transverter forms uniform reverberant field.
Wherein mud is through being the action time of ultrasonic sound field: promote sludge dewatering 2-5min, promote anaerobic sludge digestion 2-30min; The ultrasonic frequency scope is 10kHz-18kHz; The sound intensity is: promote sludge dewatering 200W/m
2-1000W/m
2, promote anaerobic sludge digestion 2000W/m
2-8000W/m
2The top condition of different types of mud may be different, and the water ratio of sound power and optimum sound frequency and excess sludge and character etc. are relevant.
This Technology also can be used for handling poisonous and hazardous excess sludge except that common residual active sludge.Art breading result can reduce excess sludge combination water content; Promote the excess sludge dehydration; Reduce the sludge filtration resistivity; Reduce the flocculation agent consumption; Promote anaerobic digestion process, reduce anaerobic digestion time, increase gas production rate, reduce organic content in the mud.
Beneficial effect:
1, utilizes reverberant field and promote sludge dewatering, follow-up anaerobism effect.Can improve the expansion characteristics of mud, the combination water content in the mud is reduced to below the 2.0g/g from 16.7g/g, reduce the about order of magnitude of mud resistivity.Can improve the operability of sludge filtration process, the sludge filtration characteristic is tended towards stability within whole pressure range.
2, adopt this technology can reduce the consumption 1/4～1/3 of flocculation agent in the filtration procedure, save great amount of cost.
3, adopt this technology can make water ratio be about 99% high moisture excess sludge after the small power supersound process, become water ratio and be about 75～85% than dewatered sludge (depending on different follow-up press filtration methods).Sludge volume significantly reduces, and has reduced the difficulty of follow-up sludge treatment, has alleviated the pressure of landfill yard.
4, the large power supersonic pre-treatment can destroy excess sludge bacterium, worm cell walls, improves the biological activity of anerobe, reduces the total COD amount of mud through anaerobic digestion.When reaching identical COD reduction amount, can make the digestion process time shorten to 15～18 days, improve more than 5 days by 20～23 days; Increase and produce methane tolerance.
Description of drawings
Fig. 1 is the processing flow chart of present technique invention.
E-1 mud thickener among the figure, E-3 ultrasonic processing apparatus, E-4 flocculate jar, E-5 anaerobic sludge digestion jar, and the E-7 pressure filter, E-2, E-6 pump, V-1, V-2 ... the V-7 valve.
As shown in Figure 1: excess sludge again among the mud thickener E-1 through for some time sedimentation, become the thickened sludge of water ratio about 98%, enter then and carry out supersound process among the ultrasonic processing apparatus E-3, be divided into two lines then: the one, enter among the flocculation jar E-4 and flocculate, enter pressure filter E-7 dehydration then; The 2nd, be introduced into and carry out anaerobic digestion among the anaerobic digestor E-5, most of organic matter decomposition is fallen, enter then among the flocculation jar E-4 and flocculate, enter pressure filter E-7 dehydration again.Mud landfill or burning disposal after the dehydration, the moisture of deviating from is looked the height of organic concentration, loops back the oxygen consumption flow processing, perhaps directly discharging.
Specific embodiment
1. adopt present technique to handle raising sub-petrochemical industry water factory excess sludge, normal temperature is handled, ultrasonic frequency 10kHz sludge retention time 15min, sound intensity 1000W/m
2Moisture percentage in sewage sludge reduces to 81% from original＞99%, and the mud resistivity is from 3.59 * 10
12Drop to 0.43 * 10
12, the flocculation agent consumption drops to 0.6% (butt) from 0.7% (butt), and the anaerobic sludge digestion time became 18 days by 22 days.
2. adopt 18kHz ultrasonic wave (＞2000W/m
2) handle certain petrochemical plant excess sludge, can destroy mud flco structure, smash the mud cell, organic matter is discharged into the organism that liquid phase becomes resolvability, make mud SCOD concentration improve more than 10 times.The mud of crossing through ultrasonication, SCOD/TCOD ratio in the digestive process (wherein TCOD is the initial total COD value of primary sludge) remains at more than 0.05, much larger than not passing through ultrasonication, promoted the sludge hydrolytic reaction, increase gas production rate about 53%, anaerobism 10 days just can make the COD reduced rate reach more than 40%.
3. adopt probe type ultrasonic producer and cleaning groove type producer (15.8kHz) that mud is handled.Under the sonde-type, ultrasonic wave is at 400W/m
2Under the sound intensity of the left and right sides, handle mud 2.5min, can eliminate pressure threshold, after the filter of mud water ratio in whole suction filtration pressure range all the increase with pressure reduce; Under the cleaning groove type, suction filtration 20min under 620mmHg vacuum tightness, ultrasonic wave sound intensity 32.2W/m
2Under to handle mud be 2.5min, water ratio is minimum after the filter of mud.Can reduce simultaneously the usage quantity of flocculation agent, reduce to 5 ‰ (butts) by 7 ‰ (butts) after the supersound process.
Claims (5)
1, a kind of promotion sludge decrement technology is characterized in that excess sludge after concentrating, and through uniform reverberation ultrasonic field pretreater processing, enters flocculation, pressure-filtering process then earlier; Perhaps earlier enter flocculation, pressure-filtering process again through anaerobic digestion.
2, technology according to claim 1 is characterized in that the reverberation ultrasonic field treater comprises ultra-sonic generator, ultrasonic transducer and treatment tank, and the treatment tank bottom is equipped with ultrasound transducer array.
3, technology according to claim 1 is characterized in that ultrasonic transducer is piezoelectric ceramic ultrasound transverter or ultrasonic magnetostrictive transverter, and the sounding effect of transverter forms uniform reverberant field.
4, technology according to claim 1 is characterized in that mud through ultrasonication 2～30min, and ultrasonic frequency is 10kHz～18kHz.
5, technology according to claim 1 is characterized in that promoting that the sludge dewatering sound intensity is 200W/m
2-1000W/m
2, promote that the anaerobic sludge digestion sound intensity is 2000W/m
2-8000W/m
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101229358A CN100390080C (en) | 2005-12-08 | 2005-12-08 | Process for facilitating sludge decrement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101229358A CN100390080C (en) | 2005-12-08 | 2005-12-08 | Process for facilitating sludge decrement |
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| Publication Number | Publication Date |
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| CN1800061A true CN1800061A (en) | 2006-07-12 |
| CN100390080C CN100390080C (en) | 2008-05-28 |
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| CNB2005101229358A Expired - Fee Related CN100390080C (en) | 2005-12-08 | 2005-12-08 | Process for facilitating sludge decrement |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249513A (en) * | 2010-05-21 | 2011-11-23 | 金达坂(上海)新能源设备有限公司 | Innocent treatment system and method for urban sludge |
| CN102531313A (en) * | 2012-01-16 | 2012-07-04 | 宁波工程学院 | Method for treating sludge and promoting reduction of sludge by using ferrate |
| CN102583918A (en) * | 2012-02-21 | 2012-07-18 | 南京大学 | Method for reducing pathogenic microorganisms in sludge from sewage treatment plant |
| CN102701548A (en) * | 2012-05-25 | 2012-10-03 | 中国人民大学 | Method for efficiently and fast treating high-content arsenic in surplus sludge |
| CN102815848A (en) * | 2012-09-13 | 2012-12-12 | 江苏江达生态科技有限公司 | Surplus sludge high-efficiency drying technique |
| CN108101323A (en) * | 2018-01-05 | 2018-06-01 | 中冶华天南京工程技术有限公司 | It is ultrasonically treated the technique of municipal wastewater excess sludge |
| WO2021089924A1 (en) * | 2019-11-08 | 2021-05-14 | Eco Wws Oy | Drying method and device for sludge |
| CN115231781A (en) * | 2022-08-08 | 2022-10-25 | 阳城县安阳污水处理有限公司 | Sewage treatment process with low sludge yield |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874199A (en) * | 1981-10-26 | 1983-05-04 | Meidensha Electric Mfg Co Ltd | Dehydrating method for waterworks sludge |
| JPS5874200A (en) * | 1981-10-26 | 1983-05-04 | Meidensha Electric Mfg Co Ltd | Dehydrating method for waterworks sludge |
| JP3444783B2 (en) * | 1998-04-30 | 2003-09-08 | 株式会社クボタ | Removal method of dioxins in sludge |
-
2005
- 2005-12-08 CN CNB2005101229358A patent/CN100390080C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249513A (en) * | 2010-05-21 | 2011-11-23 | 金达坂(上海)新能源设备有限公司 | Innocent treatment system and method for urban sludge |
| CN102249513B (en) * | 2010-05-21 | 2014-04-16 | 金达坂(上海)新能源设备有限公司 | Innocent treatment system and method for urban sludge |
| CN102531313A (en) * | 2012-01-16 | 2012-07-04 | 宁波工程学院 | Method for treating sludge and promoting reduction of sludge by using ferrate |
| CN102583918A (en) * | 2012-02-21 | 2012-07-18 | 南京大学 | Method for reducing pathogenic microorganisms in sludge from sewage treatment plant |
| CN102701548A (en) * | 2012-05-25 | 2012-10-03 | 中国人民大学 | Method for efficiently and fast treating high-content arsenic in surplus sludge |
| CN102815848A (en) * | 2012-09-13 | 2012-12-12 | 江苏江达生态科技有限公司 | Surplus sludge high-efficiency drying technique |
| CN102815848B (en) * | 2012-09-13 | 2014-03-12 | 江苏江达生态科技有限公司 | Surplus sludge high-efficiency drying technique |
| CN108101323A (en) * | 2018-01-05 | 2018-06-01 | 中冶华天南京工程技术有限公司 | It is ultrasonically treated the technique of municipal wastewater excess sludge |
| WO2021089924A1 (en) * | 2019-11-08 | 2021-05-14 | Eco Wws Oy | Drying method and device for sludge |
| CN115231781A (en) * | 2022-08-08 | 2022-10-25 | 阳城县安阳污水处理有限公司 | Sewage treatment process with low sludge yield |
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|---|---|
| CN100390080C (en) | 2008-05-28 |
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Granted publication date: 20080528 Termination date: 20100108 |