The characterisation of slurry dewatering
The dewatering of flocculated suspensions presents a significant challenge to water and waste water processing operations world-wide. Traditionally the dewatering process is enhanced through the use of flocculants or a surface chemical modifier to draw together fine particles and increase settling r...
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| Veröffentlicht in: | Water science and technology 2000-01, Vol.41 (8), p.9-16 |
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| container_title | Water science and technology |
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| creator | AZIZ, A. A. A DE KRETSER, R. G DIXON, D. R SCALES, P. J |
| description | The dewatering of flocculated suspensions presents a significant challenge to water and waste water processing operations world-wide. Traditionally the dewatering process is enhanced through the use of flocculants or a surface chemical modifier to draw together fine particles and increase settling rates and sediment permeabilities, however, present methods of gauging chemical performance are somewhat empirical. Recently, Landman and White developed a theory of suspension filtration which incorporates the compressibility and permeability of a sediment into a filtration diffusivity, D(φ). D(φ) is a material property used to calculate the time scale of a dewatering process from first principles for a given set of process conditions i.e. final desired solids concentration, applied pressure, initial sediment height. A model alumina system and an alum water treatment sludge have been used to show the effect of flocculation conditions on compressibility, permeability (determined from filtration experiments) and the diffusivity, D(φ). |
| doi_str_mv | 10.2166/wst.2000.0136 |
| format | Article |
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A. A ; DE KRETSER, R. G ; DIXON, D. R ; SCALES, P. J</creator><contributor>Ho, G ; Skrypsi-Mantele, S (eds)</contributor><creatorcontrib>AZIZ, A. A. A ; DE KRETSER, R. G ; DIXON, D. R ; SCALES, P. J ; Ho, G ; Skrypsi-Mantele, S (eds)</creatorcontrib><description>The dewatering of flocculated suspensions presents a significant challenge to water and waste water processing operations world-wide. Traditionally the dewatering process is enhanced through the use of flocculants or a surface chemical modifier to draw together fine particles and increase settling rates and sediment permeabilities, however, present methods of gauging chemical performance are somewhat empirical. Recently, Landman and White developed a theory of suspension filtration which incorporates the compressibility and permeability of a sediment into a filtration diffusivity, D(φ). D(φ) is a material property used to calculate the time scale of a dewatering process from first principles for a given set of process conditions i.e. final desired solids concentration, applied pressure, initial sediment height. A model alumina system and an alum water treatment sludge have been used to show the effect of flocculation conditions on compressibility, permeability (determined from filtration experiments) and the diffusivity, D(φ).</description><identifier>ISSN: 0273-1223</identifier><identifier>ISBN: 1900222388</identifier><identifier>ISBN: 9781900222389</identifier><identifier>EISSN: 1996-9732</identifier><identifier>DOI: 10.2166/wst.2000.0136</identifier><identifier>CODEN: WSTED4</identifier><language>eng</language><publisher>London: IWA</publisher><subject>Alum ; Aluminum oxide ; Applied sciences ; Chemical engineering ; Compressibility ; Dewatering ; Diffusivity ; Exact sciences and technology ; Filtration ; Flocculation ; Freshwater ; Gaging ; Liquid-liquid and fluid-solid mechanical separations ; Other industrial wastes. Sewage sludge ; Permeability ; Pollution ; Sediments ; Sludge ; Slurries ; Wastes ; Wastewater ; Water treatment</subject><ispartof>Water science and technology, 2000-01, Vol.41 (8), p.9-16</ispartof><rights>2001 INIST-CNRS</rights><rights>Copyright IWA Publishing Apr 2000</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c323t-9a070f9a38d55fa50b044cf97a9e44d5822e75eafb798e61cf1730bb97e6481a3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>309,310,314,780,784,789,790,23930,23931,25140,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1017032$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><contributor>Ho, G</contributor><contributor>Skrypsi-Mantele, S (eds)</contributor><creatorcontrib>AZIZ, A. A. A</creatorcontrib><creatorcontrib>DE KRETSER, R. G</creatorcontrib><creatorcontrib>DIXON, D. R</creatorcontrib><creatorcontrib>SCALES, P. J</creatorcontrib><title>The characterisation of slurry dewatering</title><title>Water science and technology</title><description>The dewatering of flocculated suspensions presents a significant challenge to water and waste water processing operations world-wide. Traditionally the dewatering process is enhanced through the use of flocculants or a surface chemical modifier to draw together fine particles and increase settling rates and sediment permeabilities, however, present methods of gauging chemical performance are somewhat empirical. Recently, Landman and White developed a theory of suspension filtration which incorporates the compressibility and permeability of a sediment into a filtration diffusivity, D(φ). D(φ) is a material property used to calculate the time scale of a dewatering process from first principles for a given set of process conditions i.e. final desired solids concentration, applied pressure, initial sediment height. A model alumina system and an alum water treatment sludge have been used to show the effect of flocculation conditions on compressibility, permeability (determined from filtration experiments) and the diffusivity, D(φ).</description><subject>Alum</subject><subject>Aluminum oxide</subject><subject>Applied sciences</subject><subject>Chemical engineering</subject><subject>Compressibility</subject><subject>Dewatering</subject><subject>Diffusivity</subject><subject>Exact sciences and technology</subject><subject>Filtration</subject><subject>Flocculation</subject><subject>Freshwater</subject><subject>Gaging</subject><subject>Liquid-liquid and fluid-solid mechanical separations</subject><subject>Other industrial wastes. Sewage sludge</subject><subject>Permeability</subject><subject>Pollution</subject><subject>Sediments</subject><subject>Sludge</subject><subject>Slurries</subject><subject>Wastes</subject><subject>Wastewater</subject><subject>Water treatment</subject><issn>0273-1223</issn><issn>1996-9732</issn><isbn>1900222388</isbn><isbn>9781900222389</isbn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNpdkEtrwzAQhEUf0CTtsfdAS6EHp7uSbVnHEvqCQC_pWawVqXFw7FSyCfn3lUkOpadl2Zlh52PsFmHGMc-f9qGbcQCYAYr8jI1QqTxRUvBzNkYFwDkXRXHBRsClSDBuV2wcwiZapEhhxB6Xazs1a_JkOuurQF3VNtPWTUPde3-YruyehkPzfc0uHdXB3pzmhH29vizn78ni8-1j_rxIjOCiSxSBBKdIFKssc5RBCWlqnJKkbJqusoJzKzNLrpSqsDkah1JAWSpp87RAEhP2cMzd-fant6HT2yoYW9fU2LYPGmUuM4gdJ-zun3DT9r6Jv2lUqRAoEDGqkqPK-DYEb53e-WpL_qAR9MBQR4Z6YKgHhlF_f0qlYKh2nhpThT8mlBCL_gJ1D22E</recordid><startdate>20000101</startdate><enddate>20000101</enddate><creator>AZIZ, A. 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| fulltext | fulltext |
| identifier | ISSN: 0273-1223 |
| ispartof | Water science and technology, 2000-01, Vol.41 (8), p.9-16 |
| issn | 0273-1223 1996-9732 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_17675097 |
| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Alum Aluminum oxide Applied sciences Chemical engineering Compressibility Dewatering Diffusivity Exact sciences and technology Filtration Flocculation Freshwater Gaging Liquid-liquid and fluid-solid mechanical separations Other industrial wastes. Sewage sludge Permeability Pollution Sediments Sludge Slurries Wastes Wastewater Water treatment |
| title | The characterisation of slurry dewatering |
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