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Biodesulfurization of Model Compounds and De-asphalted Bunker Oil by Mixed Culture
Alternative TitleAppl. Biochem. Biotechnol.
Jiang, Xia1,3; Yang, Senlin1; Li, Wangling2,3
2014
Source PublicationAPPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
ISSN0273-2289
Volume172Issue:1Pages:62-72
AbstractIn this study, complicated model sulfur compounds in bunker oil and de-asphalted bunker oil were biodesulfurized in a batch process by microbial consortium enriched from oil sludge. Dibenzothiophene (DBT) and benzo[b]naphtho[1,2-d]thiophene (BNT1) were selected as model sulfur compounds. The results show that the mixed culture was able to grow by utilizing DBT and BNT1 as the sole sulfur source, while the cell density was higher using DBT than BNT1 as the sulfur source. GC-MS analysis of their desulfurized metabolites indicates that both DBT and BNT1 could be desulfurized through the sulfur-specific degradation pathway with the selective cleavage of carbon-sulfur bonds. When DBT and BNT1 coexisted, the biodesulfurization efficiency of BNT1 decreased significantly as the DBT concentrations increased (> 0.1 mmol/L). BNT1 desulfurization efficiency also decreased along with the increase of 2-hydroxybiphenyl as the end product of DBT desulfurization. For real bunker oil, only 2.8 % of sulfur was removed without de-asphalting after 7 days of biotreatment. After de-asphalting, the biodesulfurization efficiency was significantly improved (26.2-36.5 %), which is mainly attributed to fully mixing of the oil and water due to the decreased viscosity of bunker oil.; In this study, complicated model sulfur compounds in bunker oil and de-asphalted bunker oil were biodesulfurized in a batch process by microbial consortium enriched from oil sludge. Dibenzothiophene (DBT) and benzo[b]naphtho[1,2-d]thiophene (BNT1) were selected as model sulfur compounds. The results show that the mixed culture was able to grow by utilizing DBT and BNT1 as the sole sulfur source, while the cell density was higher using DBT than BNT1 as the sulfur source. GC-MS analysis of their desulfurized metabolites indicates that both DBT and BNT1 could be desulfurized through the sulfur-specific degradation pathway with the selective cleavage of carbon-sulfur bonds. When DBT and BNT1 coexisted, the biodesulfurization efficiency of BNT1 decreased significantly as the DBT concentrations increased (> 0.1 mmol/L). BNT1 desulfurization efficiency also decreased along with the increase of 2-hydroxybiphenyl as the end product of DBT desulfurization. For real bunker oil, only 2.8 % of sulfur was removed without de-asphalting after 7 days of biotreatment. After de-asphalting, the biodesulfurization efficiency was significantly improved (26.2-36.5 %), which is mainly attributed to fully mixing of the oil and water due to the decreased viscosity of bunker oil.
KeywordBiodesulfurization Benzonaphthothiophene Heavy Oil Dibenzothiophene De-asphalting
SubtypeArticle
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s12010-013-0494-6
URL查看原文
Indexed BySCI
Language英语
WOS KeywordMICROBIAL DESULFURIZATION ; HEAVY OILS ; CRUDE-OIL ; SP STRAIN ; DIBENZOTHIOPHENE ; SULFUR ; REACTIVITY ; THIOPHENE ; BACTERIUM ; PATHWAY
WOS Research AreaBiochemistry & Molecular Biology ; Biotechnology & Applied Microbiology
WOS SubjectBiochemistry & Molecular Biology ; Biotechnology & Applied Microbiology
WOS IDWOS:000331005200006
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8040
Collection研究所(批量导入)
Affiliation1.Sichuan Univ, Coll Architecture & Environm, Chengdu 610065, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.Nanyang Technol Univ, Inst Environm Sci & Engn, Singapore 63772, Singapore
Recommended Citation
GB/T 7714
Jiang, Xia,Yang, Senlin,Li, Wangling. Biodesulfurization of Model Compounds and De-asphalted Bunker Oil by Mixed Culture[J]. APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY,2014,172(1):62-72.
APA Jiang, Xia,Yang, Senlin,&Li, Wangling.(2014).Biodesulfurization of Model Compounds and De-asphalted Bunker Oil by Mixed Culture.APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY,172(1),62-72.
MLA Jiang, Xia,et al."Biodesulfurization of Model Compounds and De-asphalted Bunker Oil by Mixed Culture".APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY 172.1(2014):62-72.
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