Document Detail


Dissolved organic nitrogen (DON) profile during backwashing cycle of drinking water biofiltration.
MedLine Citation:
PMID:  22169394     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A comprehensive investigation was made in this study on the variation of dissolved organic nitrogen (DON) during a whole backwashing cycle of the biofiltration for drinking water treatment. In such a cycle, the normalized DON concentration (C(effluent)/C(influent)) was decreased from 0.98 to 0.90 in the first 1.5h, and then gradually increased to about 1.5 in the following 8h. Finally, it remained stable until the end of this 24-hour cycle. This clearly 3-stage profile of DON could be explained by three aspects as follows: (1) the impact of the backwashing on the biomass and the microbial activity; (2) the release of soluble microbial products (SMPs) during the biofiltration; (3) the competition between heterotrophic bacteria and nitrifying bacteria. All the facts supported that more DON was generated during later part of the backwashing cycle. The significance of the conclusion is that the shorter backwashing intervals between backwashing for the drinking water biofilter should further decrease the DON concentration in effluent of biofilter.
Authors:
Bing Liu; Li Gu; Xin Yu; Guozhong Yu; Huining Zhang; Jinli Xu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-12-12
Journal Detail:
Title:  The Science of the total environment     Volume:  -     ISSN:  1879-1026     ISO Abbreviation:  -     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0330500     Medline TA:  Sci Total Environ     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Crown Copyright © 2011. Published by Elsevier B.V. All rights reserved.
Affiliation:
Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen, 361021, China; Department of Urban and Environmental Science, Xinyang Normal University, 237 Changan Road, Xinyang, 464000, China.
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