Document Detail

Metabolism of azo dyes by Lactobacillus casei TISTR 1500 and effects of various factors on decolorization.
MedLine Citation:
PMID:  17254626     Owner:  NLM     Status:  MEDLINE    
Lactobacillus casei TISTR 1500 was isolated from soil of a dairy wastewater treatment plant and selected as the most active azo dye degrader of 19 isolates. Growing cells and freely suspended cells of this strain completely degraded methyl orange, thereby decolorizing the medium. The strain stoichiometrically converted methyl orange to N,N-dimethyl-p-phenylenediamine and 4-aminobenzenesulfonic acid, which were identified by HPLC, GC, and GC-MS analyses. The enzyme activity responsible for the cleavage of the azo bond of methyl orange was localized to the cytoplasm of cells grown on modified MRS medium containing methyl orange. The effect of sugars, oligosaccharides, organic acids, metal ions, pHs, oxygen and temperatures on methyl orange decolorization by freely suspended cells was investigated. The optimal conditions for the decolorization of methyl orange by the Lactobacillus casei TISTR 1500 are incubation at 35 degrees C and pH 6 with sucrose provided as the energy source.
Phisit Seesuriyachan; Shinji Takenaka; Ampin Kuntiya; Srikarnjana Klayraung; Shuichiro Murakami; Kenji Aoki
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-01-24
Journal Detail:
Title:  Water research     Volume:  41     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2007 Mar 
Date Detail:
Created Date:  2007-02-12     Completed Date:  2007-05-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  985-92     Citation Subset:  IM    
Faculty of Agro-industry, Department of Biotechnology, Chiang Mai University, Chiang Mai 50100, Thailand.
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MeSH Terms
Azo Compounds / metabolism*
Biodegradation, Environmental
Coloring Agents / metabolism*
Hydrogen-Ion Concentration
Industrial Waste*
Lactobacillus casei / metabolism*
NADH, NADPH Oxidoreductases / metabolism
Substrate Specificity
Waste Disposal, Fluid
Water Pollutants, Chemical / metabolism
Water Purification
Reg. No./Substance:
0/Azo Compounds; 0/Coloring Agents; 0/Industrial Waste; 0/Sewage; 0/Water Pollutants, Chemical; 502-02-3/methyl orange; EC 1.6.-/NADH, NADPH Oxidoreductases; EC 1.6.-/azoreductase

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

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