Pressurised electro-osmotic dewatering of activated and anaerobically digested sludges: Electrical variables analysis
Pressurised electro-osmotic dewatering (PEOD) of two sewage sludges (activated and anaerobically digested) was studied under constant electric current (C.C.) and constant voltage (C.V.) with a laboratory chamber simulating closely an industrial filter. The influence of sludge characteristics, proces...
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| Veröffentlicht in: | Water research (Oxford) 2012-09, Vol.46 (14), p.4405-4416 |
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| creator | Citeau, M. Olivier, J. Mahmoud, A. Vaxelaire, J. Larue, O. Vorobiev, E. |
| description | Pressurised electro-osmotic dewatering (PEOD) of two sewage sludges (activated and anaerobically digested) was studied under constant electric current (C.C.) and constant voltage (C.V.) with a laboratory chamber simulating closely an industrial filter. The influence of sludge characteristics, process parameters, and electrode/filter cloth position was investigated. The next parameters were tested: 40 and 80A/m2, 20, 30, and 50V—for digested sludge dewatering; and 20, 40 and 80A/m2, 20, 30, and 50V—for activated sludge dewatering. Effects of filter cloth electric resistance and initial cake thickness were also investigated.
The application of PEOD provides a gain of 12 points of dry solids content for the digested sludge (47.0% w/w) and for the activated sludge (31.7% w/w). In PEOD processed at C.C. or at C.V., the dewatering flow rate was similar for the same electric field intensity. In C.C. mode, both the electric resistance of cake and voltage increase, causing a temperature rise by ohmic effect. In C.V. mode, a current intensity peak was observed in the earlier dewatering period. Applying at first a constant current and later on a constant voltage, permitted to have better control of ohmic heating effect. The dewatering rate was not significantly affected by the presence of filter cloth on electrodes, but the use of a thin filter cloth reduced remarkably the energy consumption compared to a thicker one: 69% of reduction energy input at 45% w/w of dry solids content. The reduction of the initial cake thickness is advantageous to increase the final dry solids content.
► Tests were carried out in a laboratory cell simulating an industrial filter-press. ► They were performed under constant electric current and constant voltage. ► Effects of filter cloth and filter cake electric resistance were investigated. ► The choice of electrical modes is important in order to extend the process. |
| doi_str_mv | 10.1016/j.watres.2012.05.053 |
| format | Article |
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The application of PEOD provides a gain of 12 points of dry solids content for the digested sludge (47.0% w/w) and for the activated sludge (31.7% w/w). In PEOD processed at C.C. or at C.V., the dewatering flow rate was similar for the same electric field intensity. In C.C. mode, both the electric resistance of cake and voltage increase, causing a temperature rise by ohmic effect. In C.V. mode, a current intensity peak was observed in the earlier dewatering period. Applying at first a constant current and later on a constant voltage, permitted to have better control of ohmic heating effect. The dewatering rate was not significantly affected by the presence of filter cloth on electrodes, but the use of a thin filter cloth reduced remarkably the energy consumption compared to a thicker one: 69% of reduction energy input at 45% w/w of dry solids content. The reduction of the initial cake thickness is advantageous to increase the final dry solids content.
► Tests were carried out in a laboratory cell simulating an industrial filter-press. ► They were performed under constant electric current and constant voltage. ► Effects of filter cloth and filter cake electric resistance were investigated. ► The choice of electrical modes is important in order to extend the process.</description><identifier>ISSN: 0043-1354</identifier><identifier>EISSN: 1879-2448</identifier><identifier>DOI: 10.1016/j.watres.2012.05.053</identifier><identifier>PMID: 22748325</identifier><identifier>CODEN: WATRAG</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Activated sludge ; Anaerobically digested sludge ; Anaerobiosis ; Applied sciences ; Biodegradation, Environmental ; Biofouling ; Cakes ; Chemical and Process Engineering ; Cities ; Cloth ; Conditioning ; Dewatering ; Drying ; electric current ; electric field ; Electric filters ; Electric Impedance ; Electric potential ; electrical resistance ; Electricity ; Electro-osmotic dewatering ; Electrodes ; Electroosmosis - methods ; energy ; Engineering Sciences ; Environmental Engineering ; Environmental Sciences ; Exact sciences and technology ; Filter cloth ; Filtration ; France ; ohmic heating ; Pollution ; Polymers - chemistry ; Pressure ; Pressure consolidation ; Reproducibility of Results ; sewage ; Sewage - chemistry ; Sewage - microbiology ; Sludge ; temperature ; Voltage ; Waste Disposal, Fluid - methods ; Water - chemistry ; Water treatment and pollution</subject><ispartof>Water research (Oxford), 2012-09, Vol.46 (14), p.4405-4416</ispartof><rights>2012 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2012 Elsevier Ltd. All rights reserved.</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c516t-6df118f777c7f41749bb09f23bbb17bfd0aeff2cff52e77138588494a7bb27e63</citedby><cites>FETCH-LOGICAL-c516t-6df118f777c7f41749bb09f23bbb17bfd0aeff2cff52e77138588494a7bb27e63</cites><orcidid>0000-0002-2673-7807 ; 0000-0003-1662-9180</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0043135412003910$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,776,780,881,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26136996$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22748325$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-02154053$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Citeau, M.</creatorcontrib><creatorcontrib>Olivier, J.</creatorcontrib><creatorcontrib>Mahmoud, A.</creatorcontrib><creatorcontrib>Vaxelaire, J.</creatorcontrib><creatorcontrib>Larue, O.</creatorcontrib><creatorcontrib>Vorobiev, E.</creatorcontrib><title>Pressurised electro-osmotic dewatering of activated and anaerobically digested sludges: Electrical variables analysis</title><title>Water research (Oxford)</title><addtitle>Water Res</addtitle><description>Pressurised electro-osmotic dewatering (PEOD) of two sewage sludges (activated and anaerobically digested) was studied under constant electric current (C.C.) and constant voltage (C.V.) with a laboratory chamber simulating closely an industrial filter. The influence of sludge characteristics, process parameters, and electrode/filter cloth position was investigated. The next parameters were tested: 40 and 80A/m2, 20, 30, and 50V—for digested sludge dewatering; and 20, 40 and 80A/m2, 20, 30, and 50V—for activated sludge dewatering. Effects of filter cloth electric resistance and initial cake thickness were also investigated.
The application of PEOD provides a gain of 12 points of dry solids content for the digested sludge (47.0% w/w) and for the activated sludge (31.7% w/w). In PEOD processed at C.C. or at C.V., the dewatering flow rate was similar for the same electric field intensity. In C.C. mode, both the electric resistance of cake and voltage increase, causing a temperature rise by ohmic effect. In C.V. mode, a current intensity peak was observed in the earlier dewatering period. Applying at first a constant current and later on a constant voltage, permitted to have better control of ohmic heating effect. The dewatering rate was not significantly affected by the presence of filter cloth on electrodes, but the use of a thin filter cloth reduced remarkably the energy consumption compared to a thicker one: 69% of reduction energy input at 45% w/w of dry solids content. The reduction of the initial cake thickness is advantageous to increase the final dry solids content.
► Tests were carried out in a laboratory cell simulating an industrial filter-press. ► They were performed under constant electric current and constant voltage. ► Effects of filter cloth and filter cake electric resistance were investigated. ► The choice of electrical modes is important in order to extend the process.</description><subject>Activated sludge</subject><subject>Anaerobically digested sludge</subject><subject>Anaerobiosis</subject><subject>Applied sciences</subject><subject>Biodegradation, Environmental</subject><subject>Biofouling</subject><subject>Cakes</subject><subject>Chemical and Process Engineering</subject><subject>Cities</subject><subject>Cloth</subject><subject>Conditioning</subject><subject>Dewatering</subject><subject>Drying</subject><subject>electric current</subject><subject>electric field</subject><subject>Electric filters</subject><subject>Electric Impedance</subject><subject>Electric potential</subject><subject>electrical resistance</subject><subject>Electricity</subject><subject>Electro-osmotic dewatering</subject><subject>Electrodes</subject><subject>Electroosmosis - methods</subject><subject>energy</subject><subject>Engineering Sciences</subject><subject>Environmental Engineering</subject><subject>Environmental Sciences</subject><subject>Exact sciences and technology</subject><subject>Filter cloth</subject><subject>Filtration</subject><subject>France</subject><subject>ohmic heating</subject><subject>Pollution</subject><subject>Polymers - chemistry</subject><subject>Pressure</subject><subject>Pressure consolidation</subject><subject>Reproducibility of Results</subject><subject>sewage</subject><subject>Sewage - chemistry</subject><subject>Sewage - microbiology</subject><subject>Sludge</subject><subject>temperature</subject><subject>Voltage</subject><subject>Waste Disposal, Fluid - methods</subject><subject>Water - chemistry</subject><subject>Water treatment and pollution</subject><issn>0043-1354</issn><issn>1879-2448</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkluL1DAUx4so7rj6DUT7IuhDx1ybdB-EZVldYUBB9zkk6cmYIdOsSTsy397UjuubCifk9juX5H-q6jlGa4xw-3a3_qHHBHlNECZrxIvRB9UKS9E1hDH5sFohxGiDKWdn1ZOcdwghQmj3uDojRDBJCV9V0-cSIk_JZ-hrCGDHFJuY93H0tu6hpIDkh20dXa3t6A9l39d6mIeGFI23OoRj3fst5Pkqh6kvy4v6-les-bo-6OS1CZBnp3DMPj-tHjkdMjw7zefV7fvrr1c3zebTh49Xl5vGctyOTds7jKUTQljhGBasMwZ1jlBjDBbG9UiDc8Q6xwkIgankUrKOaWEMEdDS8-rNEvebDuou-b1ORxW1VzeXGzWfIYI5Kx93wIV9vbB3KX6fymvU3mcLIegB4pQVbjlmGIuO_BtFRBZrufwflFFOqEQFZQtqU8w5gbuvGCM1S652apFczZIrxIvR4vbilGEye-jvnX5rXIBXJ0DnIodLerA-_-FaTNuumz_r5cI5HZXelpZQt19KJl76BnWIdYV4txBQNDt4SCpbD4OF3qeituqj_3utPwGC8tWo</recordid><startdate>20120915</startdate><enddate>20120915</enddate><creator>Citeau, M.</creator><creator>Olivier, J.</creator><creator>Mahmoud, A.</creator><creator>Vaxelaire, J.</creator><creator>Larue, O.</creator><creator>Vorobiev, E.</creator><general>Elsevier Ltd</general><general>Elsevier</general><general>IWA Publishing/Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7QH</scope><scope>7ST</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H97</scope><scope>L.G</scope><scope>SOI</scope><scope>7SU</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0002-2673-7807</orcidid><orcidid>https://orcid.org/0000-0003-1662-9180</orcidid></search><sort><creationdate>20120915</creationdate><title>Pressurised electro-osmotic dewatering of activated and anaerobically digested sludges: Electrical variables analysis</title><author>Citeau, M. ; Olivier, J. ; Mahmoud, A. ; Vaxelaire, J. ; Larue, O. ; Vorobiev, E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c516t-6df118f777c7f41749bb09f23bbb17bfd0aeff2cff52e77138588494a7bb27e63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Activated sludge</topic><topic>Anaerobically digested sludge</topic><topic>Anaerobiosis</topic><topic>Applied sciences</topic><topic>Biodegradation, Environmental</topic><topic>Biofouling</topic><topic>Cakes</topic><topic>Chemical and Process Engineering</topic><topic>Cities</topic><topic>Cloth</topic><topic>Conditioning</topic><topic>Dewatering</topic><topic>Drying</topic><topic>electric current</topic><topic>electric field</topic><topic>Electric filters</topic><topic>Electric Impedance</topic><topic>Electric potential</topic><topic>electrical resistance</topic><topic>Electricity</topic><topic>Electro-osmotic dewatering</topic><topic>Electrodes</topic><topic>Electroosmosis - methods</topic><topic>energy</topic><topic>Engineering Sciences</topic><topic>Environmental Engineering</topic><topic>Environmental Sciences</topic><topic>Exact sciences and technology</topic><topic>Filter cloth</topic><topic>Filtration</topic><topic>France</topic><topic>ohmic heating</topic><topic>Pollution</topic><topic>Polymers - chemistry</topic><topic>Pressure</topic><topic>Pressure consolidation</topic><topic>Reproducibility of Results</topic><topic>sewage</topic><topic>Sewage - chemistry</topic><topic>Sewage - microbiology</topic><topic>Sludge</topic><topic>temperature</topic><topic>Voltage</topic><topic>Waste Disposal, Fluid - methods</topic><topic>Water - chemistry</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Citeau, M.</creatorcontrib><creatorcontrib>Olivier, J.</creatorcontrib><creatorcontrib>Mahmoud, A.</creatorcontrib><creatorcontrib>Vaxelaire, J.</creatorcontrib><creatorcontrib>Larue, O.</creatorcontrib><creatorcontrib>Vorobiev, E.</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Aqualine</collection><collection>Environment Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Environment Abstracts</collection><collection>Environmental Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Water research (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Citeau, M.</au><au>Olivier, J.</au><au>Mahmoud, A.</au><au>Vaxelaire, J.</au><au>Larue, O.</au><au>Vorobiev, E.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pressurised electro-osmotic dewatering of activated and anaerobically digested sludges: Electrical variables analysis</atitle><jtitle>Water research (Oxford)</jtitle><addtitle>Water Res</addtitle><date>2012-09-15</date><risdate>2012</risdate><volume>46</volume><issue>14</issue><spage>4405</spage><epage>4416</epage><pages>4405-4416</pages><issn>0043-1354</issn><eissn>1879-2448</eissn><coden>WATRAG</coden><abstract>Pressurised electro-osmotic dewatering (PEOD) of two sewage sludges (activated and anaerobically digested) was studied under constant electric current (C.C.) and constant voltage (C.V.) with a laboratory chamber simulating closely an industrial filter. The influence of sludge characteristics, process parameters, and electrode/filter cloth position was investigated. The next parameters were tested: 40 and 80A/m2, 20, 30, and 50V—for digested sludge dewatering; and 20, 40 and 80A/m2, 20, 30, and 50V—for activated sludge dewatering. Effects of filter cloth electric resistance and initial cake thickness were also investigated.
The application of PEOD provides a gain of 12 points of dry solids content for the digested sludge (47.0% w/w) and for the activated sludge (31.7% w/w). In PEOD processed at C.C. or at C.V., the dewatering flow rate was similar for the same electric field intensity. In C.C. mode, both the electric resistance of cake and voltage increase, causing a temperature rise by ohmic effect. In C.V. mode, a current intensity peak was observed in the earlier dewatering period. Applying at first a constant current and later on a constant voltage, permitted to have better control of ohmic heating effect. The dewatering rate was not significantly affected by the presence of filter cloth on electrodes, but the use of a thin filter cloth reduced remarkably the energy consumption compared to a thicker one: 69% of reduction energy input at 45% w/w of dry solids content. The reduction of the initial cake thickness is advantageous to increase the final dry solids content.
► Tests were carried out in a laboratory cell simulating an industrial filter-press. ► They were performed under constant electric current and constant voltage. ► Effects of filter cloth and filter cake electric resistance were investigated. ► The choice of electrical modes is important in order to extend the process.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><pmid>22748325</pmid><doi>10.1016/j.watres.2012.05.053</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0002-2673-7807</orcidid><orcidid>https://orcid.org/0000-0003-1662-9180</orcidid></addata></record> |
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| subjects | Activated sludge Anaerobically digested sludge Anaerobiosis Applied sciences Biodegradation, Environmental Biofouling Cakes Chemical and Process Engineering Cities Cloth Conditioning Dewatering Drying electric current electric field Electric filters Electric Impedance Electric potential electrical resistance Electricity Electro-osmotic dewatering Electrodes Electroosmosis - methods energy Engineering Sciences Environmental Engineering Environmental Sciences Exact sciences and technology Filter cloth Filtration France ohmic heating Pollution Polymers - chemistry Pressure Pressure consolidation Reproducibility of Results sewage Sewage - chemistry Sewage - microbiology Sludge temperature Voltage Waste Disposal, Fluid - methods Water - chemistry Water treatment and pollution |
| title | Pressurised electro-osmotic dewatering of activated and anaerobically digested sludges: Electrical variables analysis |
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