Evaluation of continuous mesophilic, thermophilic and temperature phased anaerobic digestion of microwaved activated sludge
The effects of microwave (MW) pretreatment, staging and digestion temperature on anaerobic digestion were investigated in a setup of ten reactors. A mesophilic reactor was used as a control. Its performance was compared to single-stage mesophilic and thermophilic reactors treating pretreated and non...
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| Veröffentlicht in: | Water research (Oxford) 2011-04, Vol.45 (9), p.2822-2834 |
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| creator | Coelho, Nuno Miguel Gabriel Droste, Ronald L. Kennedy, Kevin J. |
| description | The effects of microwave (MW) pretreatment, staging and digestion temperature on anaerobic digestion were investigated in a setup of ten reactors. A mesophilic reactor was used as a control. Its performance was compared to single-stage mesophilic and thermophilic reactors treating pretreated and non-pretreated sludge, temperature-phased (TPAD) thermophilic-mesophilic reactors treating pretreated and non-pretreated sludge and thermophilic–thermophilic reactors also treating pretreated and non-pretreated sludge. Four different sludge retention times (SRTs) (20, 15, 10 and 5 d) were tested for all reactors. Two-stage thermo–thermo reactors treating pretreated sludge produced more biogas than all other reactors and removed more volatile solids. Maximum volatile solids (VS) removal was 53.1% at an SRT of 15 d and maximum biogas increase relative to control was 106% at the shortest SRT tested. Both the maximum VS removal and biogas relative increase were measured for a system with thermophilic acidogenic reactor and thermophilic methanogenic reactor. All the two-stage systems treating microwaved sludge produced sludge free of pathogen indicator bacteria, at all tested conditions even at a total system SRT of only 5 d. MW pretreatment and staging reactors allowed the application of very short SRT (5 d) with no significant decrease in performance in terms of VS removal in comparison with the control reactor. MW pretreatment caused the solubilization of organic material in sludge but also allowed more extensive hydrolysis of organic material in downstream reactors. The association of MW pretreatment and thermophilic operation improves dewaterability of digested sludge.
► We tested two different strategies for anaerobic digestion improvement. ► Microwaving alone produces better results than physical and temperature staging. ► The combination of Microwaving and TPAD increases the biogas production, solids removal and the applied loads without degradation in efficiency. ► MW and TPAD produce sludge with good pathogen removal. |
| doi_str_mv | 10.1016/j.watres.2011.02.032 |
| format | Article |
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► We tested two different strategies for anaerobic digestion improvement. ► Microwaving alone produces better results than physical and temperature staging. ► The combination of Microwaving and TPAD increases the biogas production, solids removal and the applied loads without degradation in efficiency. ► MW and TPAD produce sludge with good pathogen removal.</description><identifier>ISSN: 0043-1354</identifier><identifier>EISSN: 1879-2448</identifier><identifier>DOI: 10.1016/j.watres.2011.02.032</identifier><identifier>PMID: 21470653</identifier><identifier>CODEN: WATRAG</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>activated sludge ; Anaerobic digestion ; Anaerobiosis ; Applied sciences ; Bacteria ; Bacteria - metabolism ; Bacteria - radiation effects ; biogas ; Biological Oxygen Demand Analysis ; Bioreactors - microbiology ; Dewatering (separation process) ; digestion ; Exact sciences and technology ; Hydrogen-Ion Concentration ; hydrolysis ; indicator species ; Mesophilic ; methanogens ; Microwaves ; Organic materials ; pathogens ; Pollution ; Pretreatment ; Reactors ; Sewage - chemistry ; Sewage - microbiology ; Sludge ; Sludge pretreatment ; solubilization ; Temperature ; Thermophilic ; Two-stage digestion ; Waste Disposal, Fluid - methods ; Water treatment and pollution</subject><ispartof>Water research (Oxford), 2011-04, Vol.45 (9), p.2822-2834</ispartof><rights>2011 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2011 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c545t-146400e047adceb09df4dfd0d1c92551a5425519e5cd7918a3eae02a931555153</citedby><cites>FETCH-LOGICAL-c545t-146400e047adceb09df4dfd0d1c92551a5425519e5cd7918a3eae02a931555153</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.watres.2011.02.032$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24123728$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21470653$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Coelho, Nuno Miguel Gabriel</creatorcontrib><creatorcontrib>Droste, Ronald L.</creatorcontrib><creatorcontrib>Kennedy, Kevin J.</creatorcontrib><title>Evaluation of continuous mesophilic, thermophilic and temperature phased anaerobic digestion of microwaved activated sludge</title><title>Water research (Oxford)</title><addtitle>Water Res</addtitle><description>The effects of microwave (MW) pretreatment, staging and digestion temperature on anaerobic digestion were investigated in a setup of ten reactors. A mesophilic reactor was used as a control. Its performance was compared to single-stage mesophilic and thermophilic reactors treating pretreated and non-pretreated sludge, temperature-phased (TPAD) thermophilic-mesophilic reactors treating pretreated and non-pretreated sludge and thermophilic–thermophilic reactors also treating pretreated and non-pretreated sludge. Four different sludge retention times (SRTs) (20, 15, 10 and 5 d) were tested for all reactors. Two-stage thermo–thermo reactors treating pretreated sludge produced more biogas than all other reactors and removed more volatile solids. Maximum volatile solids (VS) removal was 53.1% at an SRT of 15 d and maximum biogas increase relative to control was 106% at the shortest SRT tested. Both the maximum VS removal and biogas relative increase were measured for a system with thermophilic acidogenic reactor and thermophilic methanogenic reactor. All the two-stage systems treating microwaved sludge produced sludge free of pathogen indicator bacteria, at all tested conditions even at a total system SRT of only 5 d. MW pretreatment and staging reactors allowed the application of very short SRT (5 d) with no significant decrease in performance in terms of VS removal in comparison with the control reactor. MW pretreatment caused the solubilization of organic material in sludge but also allowed more extensive hydrolysis of organic material in downstream reactors. The association of MW pretreatment and thermophilic operation improves dewaterability of digested sludge.
► We tested two different strategies for anaerobic digestion improvement. ► Microwaving alone produces better results than physical and temperature staging. ► The combination of Microwaving and TPAD increases the biogas production, solids removal and the applied loads without degradation in efficiency. ► MW and TPAD produce sludge with good pathogen removal.</description><subject>activated sludge</subject><subject>Anaerobic digestion</subject><subject>Anaerobiosis</subject><subject>Applied sciences</subject><subject>Bacteria</subject><subject>Bacteria - metabolism</subject><subject>Bacteria - radiation effects</subject><subject>biogas</subject><subject>Biological Oxygen Demand Analysis</subject><subject>Bioreactors - microbiology</subject><subject>Dewatering (separation process)</subject><subject>digestion</subject><subject>Exact sciences and technology</subject><subject>Hydrogen-Ion Concentration</subject><subject>hydrolysis</subject><subject>indicator species</subject><subject>Mesophilic</subject><subject>methanogens</subject><subject>Microwaves</subject><subject>Organic materials</subject><subject>pathogens</subject><subject>Pollution</subject><subject>Pretreatment</subject><subject>Reactors</subject><subject>Sewage - chemistry</subject><subject>Sewage - microbiology</subject><subject>Sludge</subject><subject>Sludge pretreatment</subject><subject>solubilization</subject><subject>Temperature</subject><subject>Thermophilic</subject><subject>Two-stage digestion</subject><subject>Waste Disposal, Fluid - methods</subject><subject>Water treatment and pollution</subject><issn>0043-1354</issn><issn>1879-2448</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkk2P1DAMhiMEYoeFf4CgF8SFFidNmukFCa2WD2klDrDnyJO4Mxn1i6SdFeLPk6qzcANOTqzHfh2_Yew5h4IDr94eizucAsVCAOcFiAJK8YBt-FbXuZBy-5BtAGSZ81LJC_YkxiMACFHWj9mF4FJDpcoN-3l9wnbGyQ99NjSZHfrJ9_Mwx6yjOIwH33r7JpsOFLrzLcPeZRN1IwWc5kDZeMBILqWRwrBLgPN7ivcdO2_DcIenhbCTP-GUTrGd3Z6eskcNtpGeneMlu_1w_e3qU37z5ePnq_c3uVVSTTmXlQQgkBqdpR3UrpGuceC4rYVSHJVcQk3KOl3zLZaEBALrkquUV-Ule732HcPwfU6jmc5HS22LPaWXmq2uRJk09H-QaXNCV_LfZCV0GgDqRMqVTHuIMVBjxuA7DD8MB7M4aY5mddIsThoQJjmZyl6cBeZdR-530b11CXh1BjBabJuAvfXxDye5KLXYJu7lyjU4GNyHxNx-TUoqfQcOWi9S71aCkgknT8FE66m35HwgOxk3-L_P-guSC8jq</recordid><startdate>20110401</startdate><enddate>20110401</enddate><creator>Coelho, Nuno Miguel Gabriel</creator><creator>Droste, Ronald L.</creator><creator>Kennedy, Kevin J.</creator><general>Elsevier Ltd</general><general>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>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope></search><sort><creationdate>20110401</creationdate><title>Evaluation of continuous mesophilic, thermophilic and temperature phased anaerobic digestion of microwaved activated sludge</title><author>Coelho, Nuno Miguel Gabriel ; Droste, Ronald L. ; Kennedy, Kevin J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c545t-146400e047adceb09df4dfd0d1c92551a5425519e5cd7918a3eae02a931555153</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>activated sludge</topic><topic>Anaerobic digestion</topic><topic>Anaerobiosis</topic><topic>Applied sciences</topic><topic>Bacteria</topic><topic>Bacteria - metabolism</topic><topic>Bacteria - radiation effects</topic><topic>biogas</topic><topic>Biological Oxygen Demand Analysis</topic><topic>Bioreactors - microbiology</topic><topic>Dewatering (separation process)</topic><topic>digestion</topic><topic>Exact sciences and technology</topic><topic>Hydrogen-Ion Concentration</topic><topic>hydrolysis</topic><topic>indicator species</topic><topic>Mesophilic</topic><topic>methanogens</topic><topic>Microwaves</topic><topic>Organic materials</topic><topic>pathogens</topic><topic>Pollution</topic><topic>Pretreatment</topic><topic>Reactors</topic><topic>Sewage - chemistry</topic><topic>Sewage - microbiology</topic><topic>Sludge</topic><topic>Sludge pretreatment</topic><topic>solubilization</topic><topic>Temperature</topic><topic>Thermophilic</topic><topic>Two-stage digestion</topic><topic>Waste Disposal, Fluid - methods</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Coelho, Nuno Miguel Gabriel</creatorcontrib><creatorcontrib>Droste, Ronald L.</creatorcontrib><creatorcontrib>Kennedy, Kevin J.</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>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><jtitle>Water research (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Coelho, Nuno Miguel Gabriel</au><au>Droste, Ronald L.</au><au>Kennedy, Kevin J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evaluation of continuous mesophilic, thermophilic and temperature phased anaerobic digestion of microwaved activated sludge</atitle><jtitle>Water research (Oxford)</jtitle><addtitle>Water Res</addtitle><date>2011-04-01</date><risdate>2011</risdate><volume>45</volume><issue>9</issue><spage>2822</spage><epage>2834</epage><pages>2822-2834</pages><issn>0043-1354</issn><eissn>1879-2448</eissn><coden>WATRAG</coden><abstract>The effects of microwave (MW) pretreatment, staging and digestion temperature on anaerobic digestion were investigated in a setup of ten reactors. A mesophilic reactor was used as a control. Its performance was compared to single-stage mesophilic and thermophilic reactors treating pretreated and non-pretreated sludge, temperature-phased (TPAD) thermophilic-mesophilic reactors treating pretreated and non-pretreated sludge and thermophilic–thermophilic reactors also treating pretreated and non-pretreated sludge. Four different sludge retention times (SRTs) (20, 15, 10 and 5 d) were tested for all reactors. Two-stage thermo–thermo reactors treating pretreated sludge produced more biogas than all other reactors and removed more volatile solids. Maximum volatile solids (VS) removal was 53.1% at an SRT of 15 d and maximum biogas increase relative to control was 106% at the shortest SRT tested. Both the maximum VS removal and biogas relative increase were measured for a system with thermophilic acidogenic reactor and thermophilic methanogenic reactor. All the two-stage systems treating microwaved sludge produced sludge free of pathogen indicator bacteria, at all tested conditions even at a total system SRT of only 5 d. MW pretreatment and staging reactors allowed the application of very short SRT (5 d) with no significant decrease in performance in terms of VS removal in comparison with the control reactor. MW pretreatment caused the solubilization of organic material in sludge but also allowed more extensive hydrolysis of organic material in downstream reactors. The association of MW pretreatment and thermophilic operation improves dewaterability of digested sludge.
► We tested two different strategies for anaerobic digestion improvement. ► Microwaving alone produces better results than physical and temperature staging. ► The combination of Microwaving and TPAD increases the biogas production, solids removal and the applied loads without degradation in efficiency. ► MW and TPAD produce sludge with good pathogen removal.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><pmid>21470653</pmid><doi>10.1016/j.watres.2011.02.032</doi><tpages>13</tpages></addata></record> |
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| subjects | activated sludge Anaerobic digestion Anaerobiosis Applied sciences Bacteria Bacteria - metabolism Bacteria - radiation effects biogas Biological Oxygen Demand Analysis Bioreactors - microbiology Dewatering (separation process) digestion Exact sciences and technology Hydrogen-Ion Concentration hydrolysis indicator species Mesophilic methanogens Microwaves Organic materials pathogens Pollution Pretreatment Reactors Sewage - chemistry Sewage - microbiology Sludge Sludge pretreatment solubilization Temperature Thermophilic Two-stage digestion Waste Disposal, Fluid - methods Water treatment and pollution |
| title | Evaluation of continuous mesophilic, thermophilic and temperature phased anaerobic digestion of microwaved activated sludge |
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