Document Detail


Desulfurization of light gas oil in immobilized-cell systems of Gordona sp. CYKS1 and Nocardia sp. CYKS2.
MedLine Citation:
PMID:  10620684     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Desulfurizations of a model oil (hexadecane containing dibenzothiophene (DBT)) and a diesel oil by immobilized DBT-desulfurizing bacterial strains, Gordona sp. CYKS1 and Nocardia sp. CYKS2, were carried out. Celite bead was used as a biosupport for cell immobilization. Seven-eight cycles of repeated-batch desulfurization were conducted for each strain. Each batch reaction was carried out for 24 h. In the case of model oil treatment with strain CYKS1, about 4.0 mM of DBT in hexadecane (0.13 g sulfur l(oil)(-1)) was desulfurized during the first batch, while 0.25 g sulfur l(oil)(-1) during the final eighth batch. The mean desulfurization rate increased from 0.24 for the first batch to 0.48 mg sulfur l(dispersion)(-1) h(-1) for the final batch. The sulfur content in the light gas oil was decreased from 3 to 2.1 g l(oil)(-1) by strain CYKS1 in the first batch. The mean desulfurization rate was 1.81 mg sulfur l(dispersion)(-1) h(-1), which decreased slightly when the batch reaction was repeated. No significant changes in desulfurization rate were observed with strain CYKS2 when the batch reaction was repeated. When the immobilized cells were stored at 4 degrees C in 0.1 M phosphate buffer (pH 7.0) for 10 days, the residual desulfurization activity was about 50 approximately 70% of the initial value.
Authors:
J H Chang; Y K Chang; H W Ryu; H N Chang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  FEMS microbiology letters     Volume:  182     ISSN:  0378-1097     ISO Abbreviation:  FEMS Microbiol. Lett.     Publication Date:  2000 Jan 
Date Detail:
Created Date:  2000-03-02     Completed Date:  2000-03-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7705721     Medline TA:  FEMS Microbiol Lett     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  309-12     Citation Subset:  IM    
Affiliation:
Department of Chemical Engineering and BioProcess Engineering Research Center, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusong-gu, Taejon, South Korea.
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MeSH Terms
Descriptor/Qualifier:
Actinomycetales / metabolism*
Alkanes / chemistry,  metabolism
Biodegradation, Environmental
Cells, Immobilized
Nocardia / metabolism*
Petroleum / metabolism*
Sulfur Compounds / metabolism*
Thiophenes / metabolism
Chemical
Reg. No./Substance:
0/Alkanes; 0/Petroleum; 0/Sulfur Compounds; 0/Thiophenes; 132-65-0/dibenzothiophene; 544-76-3/n-hexadecane

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


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