Document Detail


Modelling of coliform removal in 186 facultative and maturation ponds around the world.
MedLine Citation:
PMID:  16310239     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The paper presents a very extensive evaluation of the coliform decay in facultative and maturation ponds, based on data from 186 different ponds in the world. The ponds encompass a very wide diversity in terms of physical and operating conditions, covering most situations encountered in practice. The median values for the coliform removal efficiencies were 1.8 log units (98% removal) for primary facultative ponds, 1.0 log units for secondary facultative ponds (90% removal) and 1.2 log units (94% removal) for each maturation pond in the series. Two equations to be used for design purposes were derived for estimating the die-off coefficient K(b) (dispersed flow, 20 degrees C) in facultative and maturation ponds. The first equation led to a slightly better fitting with the observed logarithm of the effluent coliform concentrations (R2 = 0.874), and related K(b) with the pond detention time t and depth H (K(b) = 0.682 H(-1.286) t(-0.103)). The other equation also led to a satisfactory fitting (R2 = 0.845), but was slightly simpler, depending only on the pond depth (K(b) = 0.549 H(-1.456)).
Authors:
Marcos Von Sperling
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2005-11-28
Journal Detail:
Title:  Water research     Volume:  39     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2005-12-12     Completed Date:  2006-04-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  5261-73     Citation Subset:  IM    
Affiliation:
Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Av. Contorno 842-7 andar, 30110-060, Belo Horizonte, Brazil. marcos@desa.ufmg.br
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MeSH Terms
Descriptor/Qualifier:
Enterobacteriaceae / isolation & purification*
Models, Theoretical*
Waste Disposal, Fluid / methods*
Water Pollutants
Chemical
Reg. No./Substance:
0/Water Pollutants

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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