CN1636895A - Sludge stabilizing electrochemical treating process - Google Patents
Sludge stabilizing electrochemical treating process Download PDFInfo
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- CN1636895A CN1636895A CN 200410084745 CN200410084745A CN1636895A CN 1636895 A CN1636895 A CN 1636895A CN 200410084745 CN200410084745 CN 200410084745 CN 200410084745 A CN200410084745 A CN 200410084745A CN 1636895 A CN1636895 A CN 1636895A
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- mud
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Abstract
The sludge stabilizing electrochemical treating process includes to set sludge from primary settling tank and the secondary settling tank into electrolytic apparatus with cathode and anode or with 3D electrodes, electrolytic treatment with voltage regulating power supply or pulse power supply under static condition, aeration stirring or mechanically stirring condition for 5-50 min to stabilize sludge and kill pathogen in sludge completely. Hydrochloric acid, sodium chloride or electrolyte may be added to speed the sludge stabilizing treatment. The present invention has simple process, low power consumption and less investment, and the technology may be adopted in sewage treating yard.
Description
Technical field
The present invention relates to a kind of sludge stabilizing electrochemical treating process, adopt electrochemical method that the mud of municipal wastewater treatment plant is carried out stabilization, harmless treatment, belong to field of environment engineering technology.
Background technology
Mud is the secondary product of municipal sewage plant, from the mud of sewage work's preliminary sedimentation tank and second pond discharge, owing to contain a large amount of easy putrid organic components, thereby can give out very strong stink; In addition, a large amount of parasitic ovums, pathogenic microorganism etc. are also often arranged in the mud.Therefore, carry out often needing carry out stabilization treatment before agricultural, landfill etc. disposes at mud to mud.What sludge stabilizing was handled main employing at present is the biological process stabilization technique, comprises anaerobic digestion, aerobic sigestion, high-temperature micro-aerobic digestion, the digestion of anaerobic-aerobic two-stage and compost etc.Biological process stabilization technique cost is lower, but has shortcomings such as occupation of land is big, length consuming time.Except the biological process stabilization technique, chemical method stable (lime stabilization, chlorine oxidation and ozone oxidation etc.) also has application to a certain degree, the chemical method stabilization technique treatment time is shorter, but exist after the sludge treatment volume to become big (as lime stabilization) or security requirement is higher and operation is difficult for problems such as (stable as chlorine, ozone is stable), therefore relatively rare in actual applications.In addition, present sludge stabilizing technology has comprised that also the physics method stablizes (as pyroprocessing, ultrasonication etc.), but the physics method is stable then because energy consumption is too big, and effect is reason such as ideal not to the utmost, is difficult to be committed to application.Electrochemical process is used more in sewage disposal, but aspect sludge stabilizing, yet there are no relevant report.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of sludge stabilizing electrochemical treating process is provided, mud is reached subtract appearance rapidly, and effectively kill pathogenic agent in the mud, nervously be difficult to adopt biological process to provide the choice of technology thereby take up an area of to the sewage work that mud carries out stabilization treatment for some.
Know-why of the present invention is the free chlorine (Cl that utilizes anode to produce
2), hypochlorous acid (HClO), chloric acid (HClO
3) and the hydrogen peroxide (H that produces of negative electrode
2O
2) and hydroxyl free radical (OH) etc. the organism in the mud is carried out quick oxidation, and with the pathogenic agent quick inactivating, thereby realize sludge stabilization and innoxious.
The technical scheme that technical solution problem of the present invention is taked is as follows:
The mud that preliminary sedimentation tank and two layers of pond are emitted is inserted in the electrolyzer with yin, yang electrode, adopts the voltage stabilized source or the pulse power to carry out electrolysis treatment, and the spacing of yin, yang electrode is 2～10cm.Electrolysis voltage when adopting voltage stabilized source is 10～40V, and electric current is 0.6～1.6A; Electrolysis voltage when adopting the pulse power is 100～110V, electric current 0.1～0.2A; After the electrolysis 5～50 minutes, can make mud reach stabilization, the pathogenic agent in the mud is thoroughly killed.
Electrolysis treatment of the present invention promptly after mud is inserted electrolyzer, utilizes aeration stirring or mechanical stirring to carry out electrolysis treatment except can also carrying out under agitated conditions carrying out under the static conditions, can reach the good treatment effect.
The electrolyzer that the present invention adopts can also be the electrolyzer with three-diemsnional electrode, and promptly in the reaction unit with yin, yang electrode, the material that adding gac etc. can conduct electricity forms thin layer of successive between anodic-cathodic, and this is three-diemsnional electrode.The mud that preliminary sedimentation tank and two layers of pond are emitted is inserted in the electrolyzer with three-diemsnional electrode, under static conditions or under agitated conditions mud is carried out electrolysis treatment, can make mud reach stabilization, and the pathogenic agent in the mud is thoroughly killed.
The present invention can also add ionogen when carrying out the mud electrolysis treatment, promptly after mud is inserted electrolyzer, adding hydrochloric acid again in mud is reduced to below 6.0 pH, perhaps in mud, add 0.1～1% sodium-chlor (g/100ml mud, be weight sodium chloride/sludge volume ratio), carry out pneumatic blending or mechanical stirring, can reach sludge stabilizing, kill the effect of the pathogenic agent in the mud.
Effect of the present invention is significant, because in the mud electrolytic process, no matter be to adopt the voltage stabilized source or the pulse power, voltage is all very low, and electric current is very little, and electrolysis time does not need very longly can reach the ideal treatment effect, therefore current consumption is not high, because the sludge treatment time is short, and the sludge treatment container volume is much smaller than biological treatment, the initial cost of mud electrolytic vessel is very little simultaneously.Mud is after electrolysis treatment, and its pathogenic agent and sludge stabilizing degree can reach the requirement of the agricultural quality standard of mud (GB4248-84).If the heavy metal content of mud itself does not exceed standard, what the mud after the electrolysis can be safe is agricultural use.
Description of drawings
Fig. 1 for the present invention adopt by the yin, yang two mud electrolyzer fundamental diagram of main body very.
Among Fig. 1,1 is storage mud groove, and 2 is electrolyzer, and 3,4 are respectively the yin, yang electrode, and 5 is the electric current regulation device, and 6 is the mud discharging device, and 7 is valve, and 8 is aerating system.
The three-diemsnional electrode mud electrolyzer fundamental diagram that accompanying drawing 2 adopts for the present invention.
Among Fig. 2,1 is storage mud groove, and 2 is electrolyzer, and 3,4 are respectively the yin, yang electrode, and 5 is the electric current regulation device, and 6 is the mud discharging device, and 7 is valve, and 8 is aerating system, and 9 is the third dimension electrode of being made up of electro-conductive material such as gac.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.
Fig. 1 for the present invention adopt by the yin, yang two mud electrolyzer fundamental diagram of main body very.As shown in Figure 1, the mud electrolyzer is by electrolyzer 2, anodic-cathodic 3,4, and electric current regulation device 5 is formed.From the power supply of electric current regulation device 5 outputs is the voltage stabilized source or the pulse power.Mud moves in the electrolyzer 2 from storage mud groove 1, carries out stabilization treatment then in electrolyzer 2.In treating processes, can carry out aeration (valve 7 is closed, and aeration stops) by the aerating system of controlling by valve 78, sludge stabilizing discharges by mud discharging device 6 after handling.
The three-diemsnional electrode mud electrolyzer fundamental diagram that Fig. 2 adopts for the present invention.As shown in Figure 2, the mud electrolyzer is by electrolyzer 2, and third dimension electrode 9, the electric current regulation device 5 be made up of good conductive materials such as gacs that place anodic-cathodic 3,4 and bottom are formed.From the power supply of electric current regulation device 5 outputs is the voltage stabilized source or the pulse power.Mud moves in the electrolyzer 2 from storage mud groove 1, carries out stabilization treatment then in electrolyzer 2.In treating processes, can carry out aeration (valve 7 is closed, and this aeration stops) by the aerating system of controlling by valve 78, sludge stabilizing discharges by mud discharging device 6 after handling.
The following stated embodiments of the invention adopt the device of accompanying drawing 1 or accompanying drawing 2 to carry out respectively.
Embodiment 1
Get Shanghai Sewage Plant solid content and be 1.8% liquid sludge, utilize Fig. 1 device, do not have and utilize the voltage stabilized source electrolysis treatment under the aeration stirring condition, yin, yang interelectrode distance 2cm in the electrolyzer, voltage is 20V, electric current is 0.8A, after the electrolysis 20 minutes, the volatile solid degradation rate can reach 27% in the mud, electrolysis 50 minutes, volatile solid in the mud can remove 37%, and pathogenic agent is promptly all killed after 20 minutes in electrolysis.
Embodiment 2
Get Shanghai Sewage Plant solid content and be 2.7% liquid sludge, utilize Fig. 1 device, carry out the electrolysis treatment under the aeration stirring condition, yin, yang interelectrode distance 10cm in the electrolyzer, voltage is 40V, and electric current is 1.6A, and electrolysis is after 15 minutes, the volatile solid degradation rate can reach 43% in the mud, electrolysis 20 minutes, the volatile solid in the mud can remove 48%, electrolysis 30 minutes, volatile solid clearance reaches 49% in the mud, and pathogenic agent is promptly all killed after 15 minutes in electrolysis.
Embodiment 3
Get Shanghai Sewage Plant solid content and be 2.7% liquid sludge, utilize Fig. 1 device, carry out the electrolysis treatment under the aeration stirring condition, yin, yang interelectrode distance 4cm in the electrolyzer, voltage is 20V, and electric current is 1.6A, before the electrolysis, add 1% sodium-chlor (g/100ml mud, be weight sodium chloride/sludge volume ratio), electrolysis is after 10 minutes, and the volatile solid degradation rate can reach 40% in the mud, electrolysis 15 minutes, the volatile solid can remove 47% in the mud; If do not add sodium-chlor but directly with mud with hcl acidifying to pH4.1, mud can reach the stabilization effect about 40% about 10 minutes, electrolysis 15 minutes, the volatile solid in the mud reduces by 45%, pathogenic agent all is killed.
Embodiment 4
Get Shanghai Sewage Plant solid content and be 2.7% liquid sludge, utilize Fig. 2 device, carry out the electrolysis treatment under the aeration stirring condition, yin, yang interelectrode distance 10cm in the electrolyzer, voltage is 35V, and electric current is 1.2A, and electrolysis is after 5 minutes, the volatile solid degradation rate can reach 26% in the mud, about electrolysis 15 minutes, mud volatile solid clearance can reach 57%, electrolysis 20 minutes, volatile solid can remove 57.6% in the mud, and pathogenic agent is promptly all killed after 5 minutes in electrolysis.
Embodiment 5
Get Shanghai Sewage Plant solid content and be 2.7% liquid sludge, utilize the three-dimensional electrolysis device of Fig. 2, carry out the electrolysis treatment under the aeration stirring condition, yin, yang interelectrode distance 4cm in the electrolyzer, voltage is 20V, electric current is 0.8A.Before the electrolysis, add 1% sodium-chlor (g/100ml mud, be weight sodium chloride/sludge volume ratio), after the electrolysis 3 minutes, the mud volatile solid can remove 21%, electrolysis 10 minutes, the volatile solid clearance reaches 48%, electrolysis 15 minutes, the volatile solid in the mud reduces by 51%, and the pathogenic agent in the mud is all killed; If do not add sodium-chlor but directly with mud with hcl acidifying to pH4.1, mud in the time of 10 minutes, can reach the stabilization effect about 20% and 40% in electrolysis 3 minutes and electrolysis respectively equally, pathogenic agent all is killed.After changing the yin, yang interelectrode distance into 10cm, be 40V at voltage, electric current is 1.6A, can reach corresponding treatment effect.
Embodiment 6
Get Shanghai Sewage Plant solid content and be 2.7% liquid sludge, utilize Fig. 1 device, adopt pulsed current, carry out the electrolysis treatment under the aeration stirring condition, yin, yang interelectrode distance 4cm in the electrolyzer, voltage is 110V, electric current is 0.12A.After the electrolysis 10 minutes, the mud volatile solid can remove 45%, electrolysis 15 minutes, and the volatile solid clearance reaches 50%, electrolysis 20 minutes, the volatile solid in the mud reduces by 52%, and the pathogenic agent in the mud is all killed.
Claims (4)
1, a kind of sludge stabilizing electrochemical treating process, it is characterized in that the mud that preliminary sedimentation tank and two layers of pond emit is inserted in the electrolyzer with yin, yang electrode, adopt the voltage stabilized source or the pulse power to carry out electrolysis treatment, the spacing of yin, yang electrode is 2～10cm; Electrolysis voltage when adopting voltage stabilized source is 10～40V, and electric current is 0.6～1.6A; Electrolysis voltage when adopting the pulse power is 100～110V, and electric current is 0.1～0.2A; Electrolysis made mud reach stabilization after 5～50 minutes under static conditions or under aeration stirring or mechanical stirring condition, and the pathogenic agent in the mud is killed.
2, according to the sludge stabilizing electrochemical treating process of claim 1, it is characterized in that described electrolyzer can also be the electrolyzer with three-diemsnional electrode, promptly in reaction unit, add electro-conductive material with yin, yang electrode, between anodic-cathodic, form thin layer of successive, be three-diemsnional electrode.
3, according to the sludge stabilizing electrochemical treating process of claim 1 or 2, it is characterized in that when electrolysis treatment, in every 100ml mud, add the sodium-chlor of 0.1～1g.
4, according to the sludge stabilizing electrochemical treating process of claim 1 or 2, it is characterized in that when electrolysis treatment, in mud, add hydrochloric acid pH is reduced to below 6.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100847457A CN1332898C (en) | 2004-12-02 | 2004-12-02 | Sludge stabilizing electrochemical treating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100847457A CN1332898C (en) | 2004-12-02 | 2004-12-02 | Sludge stabilizing electrochemical treating process |
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| Publication Number | Publication Date |
|---|---|
| CN1636895A true CN1636895A (en) | 2005-07-13 |
| CN1332898C CN1332898C (en) | 2007-08-22 |
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ID=34847381
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100847457A Expired - Fee Related CN1332898C (en) | 2004-12-02 | 2004-12-02 | Sludge stabilizing electrochemical treating process |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249503A (en) * | 2011-05-12 | 2011-11-23 | 泉州师范学院 | In-situ electrolysis deodorization process for municipal sludge |
| CN102718382A (en) * | 2012-06-27 | 2012-10-10 | 常州浩瀚新材料科技有限公司 | Sludge processing technology by electrochemical direct oxidation |
| CN103723898A (en) * | 2014-01-10 | 2014-04-16 | 天津机科环保科技有限公司 | Pipeline type high-voltage decomposition sludge crushing device |
| CN103951146A (en) * | 2014-03-14 | 2014-07-30 | 上海申耀环保工程有限公司 | Sludge reduction and desiccation combination method |
| CN104003594A (en) * | 2014-05-14 | 2014-08-27 | 上海交通大学 | Method for increasing rate of sludge biological stabilization in sewage plant |
| CN104193125A (en) * | 2014-08-15 | 2014-12-10 | 上海交通大学 | Electrochemical/sodium hypochlorite coupled sludge reduction pretreatment method |
| CN105314806A (en) * | 2014-08-04 | 2016-02-10 | 昆山美淼环保科技有限公司 | Pretreatment method for deep dehydration of sludge |
| CN107913905A (en) * | 2017-12-21 | 2018-04-17 | 中科京投环境科技江苏有限公司 | A kind of device of showering mercury contaminated soil |
| CN111333438A (en) * | 2020-03-09 | 2020-06-26 | 广州市环境保护工程设计院有限公司 | System and method for treating surplus sludge of urban domestic sewage |
| CN111377581A (en) * | 2019-12-28 | 2020-07-07 | 湖南大学 | Method for electrochemically inactivating pathogenic microorganisms in sludge |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437498B (en) * | 2018-12-21 | 2020-10-13 | 中国石油大学(北京) | Method and device for treating low-concentration oily sludge in refinery sewage field |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4193854A (en) * | 1977-12-23 | 1980-03-18 | Union Carbide Corporation | Heavy metal removal from wastewater sludge |
| JPH09276898A (en) * | 1996-04-17 | 1997-10-28 | Ishigaki:Kk | Elution of harmful heavy metal in sludge |
| JPH1071399A (en) * | 1996-06-28 | 1998-03-17 | Mie Pref Gov | Treatment of sludge |
| CN1131180C (en) * | 2000-06-16 | 2003-12-17 | 清华大学 | Electrical sludge-dewatering equipment with horizontal electric field |
-
2004
- 2004-12-02 CN CNB2004100847457A patent/CN1332898C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249503A (en) * | 2011-05-12 | 2011-11-23 | 泉州师范学院 | In-situ electrolysis deodorization process for municipal sludge |
| CN102718382A (en) * | 2012-06-27 | 2012-10-10 | 常州浩瀚新材料科技有限公司 | Sludge processing technology by electrochemical direct oxidation |
| CN102718382B (en) * | 2012-06-27 | 2014-01-15 | 常州浩瀚新材料科技有限公司 | Sludge processing technology by electrochemical direct oxidation |
| CN103723898A (en) * | 2014-01-10 | 2014-04-16 | 天津机科环保科技有限公司 | Pipeline type high-voltage decomposition sludge crushing device |
| CN103951146A (en) * | 2014-03-14 | 2014-07-30 | 上海申耀环保工程有限公司 | Sludge reduction and desiccation combination method |
| CN103951146B (en) * | 2014-03-14 | 2015-11-18 | 上海申耀环保工程有限公司 | A kind of mud decrement and mummification method for combined use |
| CN104003594B (en) * | 2014-05-14 | 2016-05-04 | 上海交通大学 | Improve the method for sewage plant sludge bio-stabilization speed |
| CN104003594A (en) * | 2014-05-14 | 2014-08-27 | 上海交通大学 | Method for increasing rate of sludge biological stabilization in sewage plant |
| CN105314806A (en) * | 2014-08-04 | 2016-02-10 | 昆山美淼环保科技有限公司 | Pretreatment method for deep dehydration of sludge |
| CN104193125A (en) * | 2014-08-15 | 2014-12-10 | 上海交通大学 | Electrochemical/sodium hypochlorite coupled sludge reduction pretreatment method |
| CN104193125B (en) * | 2014-08-15 | 2016-03-02 | 上海交通大学 | The sludge reduction pretreatment process of electrochemistry/clorox coupling |
| CN107913905A (en) * | 2017-12-21 | 2018-04-17 | 中科京投环境科技江苏有限公司 | A kind of device of showering mercury contaminated soil |
| CN111377581A (en) * | 2019-12-28 | 2020-07-07 | 湖南大学 | Method for electrochemically inactivating pathogenic microorganisms in sludge |
| CN111333438A (en) * | 2020-03-09 | 2020-06-26 | 广州市环境保护工程设计院有限公司 | System and method for treating surplus sludge of urban domestic sewage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1332898C (en) | 2007-08-22 |
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