CN1800061A - Process for promoting reduction of activated sludge - Google Patents
Process for promoting reduction of activated sludge Download PDFInfo
- Publication number
- 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
- Authority
- CN
- China
- Prior art keywords
- sludge
- ultrasonic
- mud
- technology according
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title claims abstract description 18
- 230000001737 promoting effect Effects 0.000 title claims abstract 3
- 230000009467 reduction Effects 0.000 title abstract description 6
- 230000029087 digestion Effects 0.000 claims abstract description 22
- 238000005516 engineering process Methods 0.000 claims abstract description 18
- 238000005189 flocculation Methods 0.000 claims description 12
- 230000016615 flocculation Effects 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 9
- 238000002604 ultrasonography Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 238000002525 ultrasonication Methods 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 208000005156 Dehydration Diseases 0.000 abstract description 12
- 230000018044 dehydration Effects 0.000 abstract description 12
- 238000006297 dehydration reaction Methods 0.000 abstract description 12
- 239000008394 flocculating agent Substances 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000010865 sewage Substances 0.000 description 4
- 239000010801 sewage sludge Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000000967 suction filtration Methods 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 206010057248 Cell death Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000036983 biotransformation Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000009089 cytolysis Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000005111 flow chemistry technique Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 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
- Y02W10/20—Sludge processing
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a process technology for reducing excess sludge. The technical scheme of the invention is to apply the sound field to the sludge treatment process to achieve the purposes of promoting sludge dehydration and anaerobic digestion and finally achieving sludge reduction. Namely, the excess sludge of a petrochemical plant is concentrated for about 24 hours (the water content of the sludge is 96-98%), is irradiated by a proper ultrasonic field, and then is divided into two routes: firstly, directly adding a flocculating agent, dehydrating and burying; secondly, the sludge enters an anaerobic digestion device to digest and decompose most organic matters in the sludge, and then a flocculating agent is added for dehydration treatment. Finally, the volume of the sludge and the content of organic matters in the sludge are reduced, and the pressure of excess sludge treatment is relieved.
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 promoting reduction of activated sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101229358A CN100390080C (en) | 2005-12-08 | 2005-12-08 | Process for promoting reduction of activated sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1800061A true CN1800061A (en) | 2006-07-12 |
| CN100390080C CN100390080C (en) | 2008-05-28 |
Family
ID=36810323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101229358A Expired - Fee Related CN100390080C (en) | 2005-12-08 | 2005-12-08 | Process for promoting reduction of activated sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100390080C (en) |
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 |
|---|---|---|---|---|
| JPS5874200A (en) * | 1981-10-26 | 1983-05-04 | Meidensha Electric Mfg Co Ltd | Dehydrating method for waterworks sludge |
| JPS5874199A (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100390080C (en) | 2008-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100390080C (en) | Process for promoting reduction of activated sludge | |
| CN107010788B (en) | Large-scale pig farm cultivation wastewater treatment system and method | |
| CN1321078C (en) | Method for sludge reduction using ultrasonic treatment | |
| CN102329051B (en) | Rubbish percolate treatment device by taking advanced oxidation and comprehensive membrane treatment as cores | |
| KR20130112145A (en) | Anaerobic piggery wastewater treatment and bio gas assemble apparatus | |
| CN101704615A (en) | Method for reducing sludge by adopting ultrasound-magnetic field coupling to disrupt sludge | |
| CN103298751A (en) | Treatment of a waste stream through production and utilization of oxyhydrogen gas | |
| CN102531313A (en) | Method for treating sludge and promoting reduction of sludge by using ferrate | |
| CN103043869B (en) | Recycling sewage treatment equipment by utilizing automatic backflow reactor and sewage treatment method thereof | |
| CN1569699A (en) | Process for treating excess sludge | |
| CN1730415A (en) | Technique for treating garbage percolate based on diatomite and UASB | |
| CN101244882A (en) | Method for reducing sewage sludge in biological sewage treatment process by using ultrasound wave | |
| CN105016594A (en) | Method for treating nutrient substances in excess sludge and special high-voltage alternating-current pulse sludge decomposition device | |
| JP3698419B2 (en) | Organic sludge reduction method and apparatus | |
| CN100337948C (en) | Comprehensive treatment method and system for sludge from city sewage processing | |
| CN1554603A (en) | Process and method for treating city waste warter | |
| CN213295084U (en) | A effluent treatment plant for kitchen garbage handles | |
| CN204079590U (en) | A kind of sewage generating system adopting anaerobically fermenting process | |
| CN113860632A (en) | Pretreatment system and method for landfill leachate wastewater | |
| CN104163542B (en) | Sanitary sewage filtering device | |
| CN203613083U (en) | Equipment for ultrasonic Fenton reaction and anaerobic digestion combined treatment of industrial sludge | |
| CN107352711B (en) | Sewage treatment system with nano electrolysis and high-frequency oscillation | |
| Nour et al. | The Potentials of an Integrated Ultrasonic Membrane Anaerobic System (IUMAS) in Treating Sugar Cane Wastewater | |
| CN204079725U (en) | A kind of utilize burning sewage in the device of foul smell for generating electricity | |
| CN204022619U (en) | Sanitary sewage filtering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080528 Termination date: 20100108 |