Simultaneous Removal of Thiophene and Dibenzothiophene by Immobilized Pseudomonas delafieldii R-8 cells

Biodesulfurization （BDS） is a promising technology for deep desulfurization. In this work, Pseudomonas delafieldii R-8 cells are immobilized in calcium alginate beads and used for BDS of transportation fuels. It is found that thiophene and dibenzothiophene （DBT） can be simultaneously metabolized by...

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Published inChinese journal of chemical engineering Vol. 20; no. 1; pp. 47 - 51
Main Author 唐煌 李强 王泽龙 闫道江 邢建民
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.2012
Subjects
alginate immobilization
BDS
biodesulfurization
long-term recycling
Pseudomonas
simultaneous removal
二苯并噻吩
假单胞菌
固定化细胞
海藻酸钠
深度脱硫技术
细胞代谢
脱除
long-term recycling
alginate immobilization
biodesulfurization
simultaneous removal
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ISSN1004-9541
2210-321X
DOI10.1016/S1004-9541(12)60362-0

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Summary:Biodesulfurization （BDS） is a promising technology for deep desulfurization. In this work, Pseudomonas delafieldii R-8 cells are immobilized in calcium alginate beads and used for BDS of transportation fuels. It is found that thiophene and dibenzothiophene （DBT） can be simultaneously metabolized by immobilized R-8 cells. The initial sulfur content in the model oil is 300 mg·kg-1 （thiophene ＂ DI3T= 1 ＂ 1）. After 10 h of treatment, the thiophene concentration is reduced by 40%, while DBT is reduced by 25%. The utilization rate of thiophene is faster than that of DBT. Moreover, the oil/water ratio of alginate immobilized cells is studied to reduce the water volume in desulfurization systems. Long-term recycling of BDS by alginate immobilized cells is carried out with oil/water ratio at 5 ： 1. The immobilized cells are successfully reused over 15 batch cycles. In the last batch, the desulfurization activity remains at least 75% of the first batch.
Bibliography:biodesulfurization, simultaneous removal, alginate immobilization, long-term recycling
Biodesulfurization （BDS） is a promising technology for deep desulfurization. In this work, Pseudomonas delafieldii R-8 cells are immobilized in calcium alginate beads and used for BDS of transportation fuels. It is found that thiophene and dibenzothiophene （DBT） can be simultaneously metabolized by immobilized R-8 cells. The initial sulfur content in the model oil is 300 mg·kg-1 （thiophene ＂ DI3T= 1 ＂ 1）. After 10 h of treatment, the thiophene concentration is reduced by 40%, while DBT is reduced by 25%. The utilization rate of thiophene is faster than that of DBT. Moreover, the oil/water ratio of alginate immobilized cells is studied to reduce the water volume in desulfurization systems. Long-term recycling of BDS by alginate immobilized cells is carried out with oil/water ratio at 5 ： 1. The immobilized cells are successfully reused over 15 batch cycles. In the last batch, the desulfurization activity remains at least 75% of the first batch.
TANG Huang , LI Qiang , WANG Zelong YAN Daojiang XING Jianmin 1 National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
11-3270/TQ
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1004-9541
2210-321X
DOI:10.1016/S1004-9541(12)60362-0