{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/118347"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/118347","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Relationships between sludge specific resistance, coefficient of compressibility, blinding coefficient and vacuum filter yield","abstract":"The relationships between an activated sludge's particle size distribution and its specific resistance were investigated. Particle size distributions were rearranged by sludge storage, replacing sludge supernatant with alum sludge supernatant, and by polymer conditioning. Specific resistance was found to increase with decreasing mean particle size. The blinding coefficient (B) was used to show the influence of mean particle size on filter cloth blinding. Blinding was shown to occur only for mean diameters less than 40u. The use of the blinding coefficient also allowed the prediction of maximum and minimum values of specific resistance and showed blinded sludges to have underestimated specific resistance values. The coefficient of compressibility was shown to decrease with increasing mean particle size. The use of the coefficient of compressibility to predict vacuum filter yield was shown to be a valid relationship.","abstract_html":"The relationships between an activated sludge's particle size distribution and its specific resistance were investigated. Particle size distributions were rearranged by sludge storage, replacing sludge supernatant with alum sludge supernatant, and by polymer conditioning. Specific resistance was found to increase with decreasing mean particle size. The blinding coefficient (B) was used to show the influence of mean particle size on filter cloth blinding. Blinding was shown to occur only for mean diameters less than 40u. The use of the blinding coefficient also allowed the prediction of maximum and minimum values of specific resistance and showed blinded sludges to have underestimated specific resistance values. The coefficient of compressibility was shown to decrease with increasing mean particle size. The use of the coefficient of compressibility to predict vacuum filter yield was shown to be a valid relationship.","abstract_has_math":false,"creators":["Goodman, Gregory"],"institution":"Virginia Polytechnic Institute and State University","degree_name":"M.S.","degree_level":"masters","degree_discipline":"Sanitary Engineering","degree_department":"Sanitary Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1983,"date_issued":"1983","date_published":"1983","updated_at":"2026-07-22T22:20:40Z","subjects":[],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10919/118347","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Sanitary Engineering"]},{"key":"dc:creator","label":"Author","values":["Goodman, Gregory"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2024-03-12T20:23:22Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2024-03-12T20:23:22Z"]},{"key":"dc:date.issued","label":"Date","values":["1983"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute and State University"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Sanitary Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10919/118347"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The relationships between an activated sludge's particle size distribution and its specific resistance were investigated. Particle size distributions were rearranged by sludge storage, replacing sludge supernatant with alum sludge supernatant, and by polymer conditioning. Specific resistance was found to increase with decreasing mean particle size. The blinding coefficient (B) was used to show the influence of mean particle size on filter cloth blinding. Blinding was shown to occur only for mean diameters less than 40u. The use of the blinding coefficient also allowed the prediction of maximum and minimum values of specific resistance and showed blinded sludges to have underestimated specific resistance values. The coefficient of compressibility was shown to decrease with increasing mean particle size. The use of the coefficient of compressibility to predict vacuum filter yield was shown to be a valid relationship."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["M.S."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Relationships between sludge specific resistance, coefficient of compressibility, blinding coefficient and vacuum filter yield"]}]}],"canonical_facts":{"dc:contributor.department":["Sanitary Engineering"],"dc:creator":["Goodman, Gregory"],"dc:date.accessioned":["2024-03-12T20:23:22Z"],"dc:date.available":["2024-03-12T20:23:22Z"],"dc:date.issued":["1983"],"dc:description.abstract":["The relationships between an activated sludge's particle size distribution and its specific resistance were investigated. Particle size distributions were rearranged by sludge storage, replacing sludge supernatant with alum sludge supernatant, and by polymer conditioning. Specific resistance was found to increase with decreasing mean particle size. The blinding coefficient (B) was used to show the influence of mean particle size on filter cloth blinding. Blinding was shown to occur only for mean diameters less than 40u. The use of the blinding coefficient also allowed the prediction of maximum and minimum values of specific resistance and showed blinded sludges to have underestimated specific resistance values. The coefficient of compressibility was shown to decrease with increasing mean particle size. 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