A review of thermal sludge pre-treatment processes to improve dewaterability
As a result of the wide application and utilization of the waste activated sludge process, excess sludge presents a serious disposal problem. Many efforts have been devoted to reduce the excess sludge by treatments such as digestion and dewatering. It has been known for many years that a thermal pre...
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| Veröffentlicht in: | Journal of Hazardous Materials 2003-03, Vol.98 (1), p.51-67 |
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| creator | Neyens, E Baeyens, J |
| description | As a result of the wide application and utilization of the waste activated sludge process, excess sludge presents a serious disposal problem. Many efforts have been devoted to reduce the excess sludge by treatments such as digestion and dewatering. It has been known for many years that a thermal pre-treatment gives an improvement in the dewaterability of sludges. This paper provides a literature review concerning the optimum treatment conditions to obtain enhanced dewaterability and digestibility of sludge. The main commercial hydrolysis processes (Cambi, Porteous and Zimpro) are discussed. The literature findings concerning the optimum treatment conditions of thermal or thermochemical pre-treatments are reviewed.
The second part of this paper deals with the fundamentals of improving sludge dewatering. The influence of extracellular polymer (ECP) on settling and dewatering characteristics is discussed, together with the importance of cations and ECP-hydrophobicity in the flocculation and dewatering process. Finally, the effect on exocellular polymer, dewaterability, settleability and colloidal stability of activated sludge by treatment with sulfuric acid was studied. |
| doi_str_mv | 10.1016/S0304-3894(02)00320-5 |
| format | Article |
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The second part of this paper deals with the fundamentals of improving sludge dewatering. The influence of extracellular polymer (ECP) on settling and dewatering characteristics is discussed, together with the importance of cations and ECP-hydrophobicity in the flocculation and dewatering process. Finally, the effect on exocellular polymer, dewaterability, settleability and colloidal stability of activated sludge by treatment with sulfuric acid was studied.</description><identifier>ISSN: 0304-3894</identifier><identifier>EISSN: 1873-3336</identifier><identifier>DOI: 10.1016/S0304-3894(02)00320-5</identifier><identifier>PMID: 12628777</identifier><identifier>CODEN: JHMAD9</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Acid treatment ; Applied sciences ; Dewaterability ; ECP ; Exact sciences and technology ; Humans ; Hydrolysis ; Other industrial wastes. Sewage sludge ; Pollution ; Polymers ; Sludge pre-treatment ; Temperature ; Waste Disposal, Fluid - methods ; Wastes</subject><ispartof>Journal of Hazardous Materials, 2003-03, Vol.98 (1), p.51-67</ispartof><rights>2003 Elsevier Science B.V.</rights><rights>2003 INIST-CNRS</rights><rights>Copyright 2003 Elsevier Science B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c587t-42855f291a5a2828a68c1576eabf8ddbb1b58e4fcb0b9c469032bbabe2c14d053</citedby><cites>FETCH-LOGICAL-c587t-42855f291a5a2828a68c1576eabf8ddbb1b58e4fcb0b9c469032bbabe2c14d053</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0304-3894(02)00320-5$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>313,314,780,784,792,3550,27922,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=14652835$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/12628777$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Neyens, E</creatorcontrib><creatorcontrib>Baeyens, J</creatorcontrib><title>A review of thermal sludge pre-treatment processes to improve dewaterability</title><title>Journal of Hazardous Materials</title><addtitle>J Hazard Mater</addtitle><description>As a result of the wide application and utilization of the waste activated sludge process, excess sludge presents a serious disposal problem. Many efforts have been devoted to reduce the excess sludge by treatments such as digestion and dewatering. It has been known for many years that a thermal pre-treatment gives an improvement in the dewaterability of sludges. This paper provides a literature review concerning the optimum treatment conditions to obtain enhanced dewaterability and digestibility of sludge. The main commercial hydrolysis processes (Cambi, Porteous and Zimpro) are discussed. The literature findings concerning the optimum treatment conditions of thermal or thermochemical pre-treatments are reviewed.
The second part of this paper deals with the fundamentals of improving sludge dewatering. The influence of extracellular polymer (ECP) on settling and dewatering characteristics is discussed, together with the importance of cations and ECP-hydrophobicity in the flocculation and dewatering process. Finally, the effect on exocellular polymer, dewaterability, settleability and colloidal stability of activated sludge by treatment with sulfuric acid was studied.</description><subject>Acid treatment</subject><subject>Applied sciences</subject><subject>Dewaterability</subject><subject>ECP</subject><subject>Exact sciences and technology</subject><subject>Humans</subject><subject>Hydrolysis</subject><subject>Other industrial wastes. Sewage sludge</subject><subject>Pollution</subject><subject>Polymers</subject><subject>Sludge pre-treatment</subject><subject>Temperature</subject><subject>Waste Disposal, Fluid - methods</subject><subject>Wastes</subject><issn>0304-3894</issn><issn>1873-3336</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkU1vEzEQhi1URNPATwDtpag9LIy_vaeqqtqCFIkDcLZs7yy42s0W22nVf4_TRO0xJ2ukx_POzEPIRwpfKFD19SdwEC03nTgDdg7AGbTyDVlQo3nLOVdHZPGCHJOTnO8AgGop3pFjyhQzWusFWV02CR8iPjbz0JS_mCY3Nnnc9H-wuU_YloSuTLgutZoD5oy5KXMTp1o-YNPjoyuYnI9jLE_vydvBjRk_7N8l-X1z_evqW7v6cfv96nLVBml0aQUzUg6so046ZphxygQqtULnB9P33lMvDYohePBdEKqry3nvPLJARQ-SL8nnXd86xL8N5mKnmAOOo1vjvMlWc-iAcnEQZLpTsp7zIEg7pQ0Xh6OpUIqyev8lkTswpDnnhIO9T3Fy6clSsFuD9tmg3eqxwOyzQbsN-LQP2PgJ-9dfe2UVON0DLgc3DsmtQ8yvnFCSGb5tdLHjsJqohpPNIeI6YB8ThmL7OR4Y5T-lHLeF</recordid><startdate>20030317</startdate><enddate>20030317</enddate><creator>Neyens, E</creator><creator>Baeyens, J</creator><general>Elsevier B.V</general><general>Elsevier</general><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>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7U7</scope><scope>7UA</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>7X8</scope></search><sort><creationdate>20030317</creationdate><title>A review of thermal sludge pre-treatment processes to improve dewaterability</title><author>Neyens, E ; Baeyens, J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c587t-42855f291a5a2828a68c1576eabf8ddbb1b58e4fcb0b9c469032bbabe2c14d053</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Acid treatment</topic><topic>Applied sciences</topic><topic>Dewaterability</topic><topic>ECP</topic><topic>Exact sciences and technology</topic><topic>Humans</topic><topic>Hydrolysis</topic><topic>Other industrial wastes. Sewage sludge</topic><topic>Pollution</topic><topic>Polymers</topic><topic>Sludge pre-treatment</topic><topic>Temperature</topic><topic>Waste Disposal, Fluid - methods</topic><topic>Wastes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Neyens, E</creatorcontrib><creatorcontrib>Baeyens, J</creatorcontrib><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>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Toxicology Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of Hazardous Materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Neyens, E</au><au>Baeyens, J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A review of thermal sludge pre-treatment processes to improve dewaterability</atitle><jtitle>Journal of Hazardous Materials</jtitle><addtitle>J Hazard Mater</addtitle><date>2003-03-17</date><risdate>2003</risdate><volume>98</volume><issue>1</issue><spage>51</spage><epage>67</epage><pages>51-67</pages><issn>0304-3894</issn><eissn>1873-3336</eissn><coden>JHMAD9</coden><abstract>As a result of the wide application and utilization of the waste activated sludge process, excess sludge presents a serious disposal problem. Many efforts have been devoted to reduce the excess sludge by treatments such as digestion and dewatering. It has been known for many years that a thermal pre-treatment gives an improvement in the dewaterability of sludges. This paper provides a literature review concerning the optimum treatment conditions to obtain enhanced dewaterability and digestibility of sludge. The main commercial hydrolysis processes (Cambi, Porteous and Zimpro) are discussed. The literature findings concerning the optimum treatment conditions of thermal or thermochemical pre-treatments are reviewed.
The second part of this paper deals with the fundamentals of improving sludge dewatering. The influence of extracellular polymer (ECP) on settling and dewatering characteristics is discussed, together with the importance of cations and ECP-hydrophobicity in the flocculation and dewatering process. Finally, the effect on exocellular polymer, dewaterability, settleability and colloidal stability of activated sludge by treatment with sulfuric acid was studied.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><pmid>12628777</pmid><doi>10.1016/S0304-3894(02)00320-5</doi><tpages>17</tpages></addata></record> |
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| ispartof | Journal of Hazardous Materials, 2003-03, Vol.98 (1), p.51-67 |
| issn | 0304-3894 1873-3336 |
| language | eng |
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| source | MEDLINE; Elsevier ScienceDirect Journals Complete |
| subjects | Acid treatment Applied sciences Dewaterability ECP Exact sciences and technology Humans Hydrolysis Other industrial wastes. Sewage sludge Pollution Polymers Sludge pre-treatment Temperature Waste Disposal, Fluid - methods Wastes |
| title | A review of thermal sludge pre-treatment processes to improve dewaterability |
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