Document Detail


A net water production model for ultrafiltration including flow direction reversal and chemically assisted backwashing.
MedLine Citation:
PMID:  17824534     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Sandro R Lautenschlager; Francis A DiGiano; Andrew J Schuler; Sidney Seckler Filho Ferreira
Related Documents :
3566354 - Induction of follicular growth in the squirrel monkey (saimiri sciureus): enhanced reco...
11326624 - Chiari i malformation: clinical presentation and management.
19115194 - Ertapenem clearance during modeled continuous renal replacement therapy.
950264 - Significance of daily rhythm for the interpretation of functional diagnostic procedures.
24782684 - High-intensity interval training and β-hydroxy-β-methylbutyric free acid improves aer...
20192244 - Differential metabolomics for quantitative assessment of oxidative stress with strenuou...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
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:
Created Date:  2007-09-10     Completed Date:  2007-10-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9886167     Medline TA:  Water Environ Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  877-86     Citation Subset:  IM    
Affiliation:
Department of Civil Engineering, State University of Maringá, Maringá, Paraná, Brazil.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
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


Previous Document:  Yard waste compost as a stormwater protection treatment for construction sites.
Next Document:  Estimation of the intrinsic maximum substrate utilization rate using batch reactors with denitrifyin...