Document Detail


Determination of biodegradable dissolved organic carbon using entrapped mixed microbial cells.
MedLine Citation:
PMID:  14604645     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Several methods for determining biodegradable dissolved organic carbon (BDOC) in water have been developed within the last two decades. However, the problem with most of these methods is the length of time required for the start-up (colonization) and/or determination from days to weeks. In this study, a simple and rapid continuous bioreactor procedure using immobilized cells was developed for BDOC determination. In the first stage of the development, the bioreactors were aerated to ensure that dissolved oxygen was not rate limiting. However, BDOC results obtained from the aerated bioreactors suffered from a large error caused by the release of background dissolved organic carbon (DOC). As a consequence, a different bioreactor scheme, in which the feed (sample) instead of the bioreactor was aerated, was tested. Results show that the feed aerated (FA) bioreactor is a better tool for BDOC determination especially for waters with low initial organic concentrations because of less background DOC released by the immobilized cell systems. Using the FA bioreactor, the accurate and reproducible measurement of BDOC can be achieved within a hydraulic retention time of 3 h, and no start-up period is required.
Authors:
Eakalak Khan; Roger W Babcock; Santi Jongskul; Frederick A Devadason; Seree Tuprakay
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Water research     Volume:  37     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2003 Dec 
Date Detail:
Created Date:  2003-11-07     Completed Date:  2004-03-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  4981-91     Citation Subset:  IM    
Affiliation:
Department of Civil Engineering and Construction, North Dakota State University, Fargo, ND 58105, USA. eakalak.khan@ndsu.nodak.edu
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MeSH Terms
Descriptor/Qualifier:
Biodegradation, Environmental
Bioreactors*
Carbon / chemistry,  metabolism*
Organic Chemicals / metabolism
Time Factors
Waste Disposal, Fluid / methods*
Water Movements
Chemical
Reg. No./Substance:
0/Organic Chemicals; 7440-44-0/Carbon

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


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