Evaluation of High-Rate Clarification for Wet-Weather-Only Treatment Facilities
High-rate clarification (HRC) processes are well suited for enhanced primary treatment of wet-weather flows in combined sewer systems. Suspended solids removal in excess of 75% of influent concentrations can be achieved consistently. Chemical oxygen demand and five-day biochemical oxygen demand remo...
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| Veröffentlicht in: | Water environment research 2004-09, Vol.76 (5), p.474-480 |
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| creator | Jolis, Domènec Ahmad, Meei-Lih |
| description | High-rate clarification (HRC) processes are well suited for enhanced primary treatment of wet-weather flows in combined sewer systems. Suspended solids removal in excess of 75% of influent concentrations can be achieved consistently. Chemical oxygen demand and five-day biochemical oxygen demand removal are better than 60%. However, although optimal treatment could be achieved in a matter of minutes when the units were started full, a delay of up to one-half hour was observed when the units were started empty. Operational strategies that minimize this effect need to be developed in full-scale tests before HRC processes can be implemented with confidence in wet-weather-only facilities. |
| doi_str_mv | 10.2175/106143004X151563 |
| format | Article |
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Suspended solids removal in excess of 75% of influent concentrations can be achieved consistently. Chemical oxygen demand and five-day biochemical oxygen demand removal are better than 60%. However, although optimal treatment could be achieved in a matter of minutes when the units were started full, a delay of up to one-half hour was observed when the units were started empty. Operational strategies that minimize this effect need to be developed in full-scale tests before HRC processes can be implemented with confidence in wet-weather-only facilities.</description><identifier>ISSN: 1061-4303</identifier><identifier>EISSN: 1554-7531</identifier><identifier>DOI: 10.2175/106143004X151563</identifier><identifier>PMID: 15523794</identifier><language>eng</language><publisher>Alexandria, VA: Water Environment Federation</publisher><subject>Applied sciences ; Atmospheric pollution ; BALLASTED FLOCCULATION ; Chemical oxygen demand ; Chlorides ; Coagulants ; COMBINED SEWER OVERFLOWS ; Exact sciences and technology ; Filtration ; Flocculation ; HIGH‐RATE CLARIFICATION ; Nutrient removal ; Pollution ; Polymers ; Rain ; Research Notes ; Sewage ; Sewer systems ; Sludge ; Start up firms ; Suspended solids ; Turbidity ; Waste Disposal, Fluid - methods ; Wastewater treatment ; Water Movements ; Water Pollutants - isolation & purification ; Water treatment plants ; WET‐WEATHER‐ONLY TREATMENT FACILITIES</subject><ispartof>Water environment research, 2004-09, Vol.76 (5), p.474-480</ispartof><rights>Copyright 2004 The Water Environment Federation (WEF)</rights><rights>2004 Water Environment Federation</rights><rights>2005 INIST-CNRS</rights><rights>Copyright Water Environment Federation Sep/Oct 2004</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4534-a2a5f8674655de799eb739be900b42c56d128a28c879f34e9fcfafd92ff2a5e3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/25045810$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/25045810$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,1411,27903,27904,45553,45554,57996,58229</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16156734$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15523794$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Jolis, Domènec</creatorcontrib><creatorcontrib>Ahmad, Meei-Lih</creatorcontrib><title>Evaluation of High-Rate Clarification for Wet-Weather-Only Treatment Facilities</title><title>Water environment research</title><addtitle>Water Environ Res</addtitle><description>High-rate clarification (HRC) processes are well suited for enhanced primary treatment of wet-weather flows in combined sewer systems. Suspended solids removal in excess of 75% of influent concentrations can be achieved consistently. Chemical oxygen demand and five-day biochemical oxygen demand removal are better than 60%. However, although optimal treatment could be achieved in a matter of minutes when the units were started full, a delay of up to one-half hour was observed when the units were started empty. 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Suspended solids removal in excess of 75% of influent concentrations can be achieved consistently. Chemical oxygen demand and five-day biochemical oxygen demand removal are better than 60%. However, although optimal treatment could be achieved in a matter of minutes when the units were started full, a delay of up to one-half hour was observed when the units were started empty. Operational strategies that minimize this effect need to be developed in full-scale tests before HRC processes can be implemented with confidence in wet-weather-only facilities.</abstract><cop>Alexandria, VA</cop><pub>Water Environment Federation</pub><pmid>15523794</pmid><doi>10.2175/106143004X151563</doi><tpages>7</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1061-4303 |
| ispartof | Water environment research, 2004-09, Vol.76 (5), p.474-480 |
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| language | eng |
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| source | MEDLINE; Wiley Online Library Journals Frontfile Complete; Jstor Complete Legacy |
| subjects | Applied sciences Atmospheric pollution BALLASTED FLOCCULATION Chemical oxygen demand Chlorides Coagulants COMBINED SEWER OVERFLOWS Exact sciences and technology Filtration Flocculation HIGH‐RATE CLARIFICATION Nutrient removal Pollution Polymers Rain Research Notes Sewage Sewer systems Sludge Start up firms Suspended solids Turbidity Waste Disposal, Fluid - methods Wastewater treatment Water Movements Water Pollutants - isolation & purification Water treatment plants WET‐WEATHER‐ONLY TREATMENT FACILITIES |
| title | Evaluation of High-Rate Clarification for Wet-Weather-Only Treatment Facilities |
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