| A net water production model for ultrafiltration including flow direction reversal and chemically assisted backwashing. | |
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MedLine Citation:
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PMID: 17824534 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Flow direction reversal (FDR) was proposed as a novel method to increase net water production (NWP) during cross-flow ultrafiltration. The design of the pilot-plant study allowed measurement of specific flux recovery after each chemically assisted backwash (BW) combined with FDR and after each FDR at the midpoint of each BW/FDR cycle. The percent recovery of specific flux was higher following FDR (55%) than combined BW and FDR (53%) at lower chemical dosages; however, the percent increase in specific flux recovery by FDR was much lower (20%) when the chemical dose was doubled. A mathematical model was developed to predict the NWP achieved by any combination ofBW/ FDR and FDR frequency. For example, the advantage of introducing FDR was demonstrated at the lower chlorine dose, whereby the percent increase in NWP by alternating 15-minute intervals of BW/FDR with FDR over BW/ FDR alone was 10% for 30-minute BW/FDR intervals and 2% for 15-minute BW/FDR intervals. |
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Authors:
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Sandro R Lautenschlager; Francis A DiGiano; Andrew J Schuler; Sidney Seckler Filho Ferreira |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Water environment research : a research publication of the Water Environment Federation Volume: 79 ISSN: 1061-4303 ISO Abbreviation: Water Environ. Res. Publication Date: 2007 Aug |
Date Detail:
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Created Date: 2007-09-10 Completed Date: 2007-10-16 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9886167 Medline TA: Water Environ Res Country: United States |
Other Details:
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Languages: eng Pagination: 877-86 Citation Subset: IM |
Affiliation:
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Department of Civil Engineering, State University of Maringá, Maringá, Paraná, Brazil. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Models, Theoretical Pilot Projects Ultrafiltration / methods* Waste Disposal, Fluid / methods* Water Purification / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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