Improved biodesulfurization of hydrodesulfurized diesel oil using Rhodococcus erythropolis and Gordonia sp.
Substituted benzothiophenes (BTs) and dibenzothiophenes (DBTs) remain in diesel oil following conventional desulfurization by hydrodesulfurization. A mixture of washed cells (13.6 g dry cell wt l(-1)) of Rhodococcus erythropolis DS-3 and Gordonia sp. C-6 were employed to desulfurize hydrodesulfurized diesel oil; its sulfur content was reduced from 1.26 g l(-1) to 180 mg l(-1), approx 86% (w/w) of the total sulfur was removed from diesel oil after three cycles of biodesulfurization. The average desulfurization rate was 0.22 mg sulfur (g dry cell wt)(-1) h(-1). A bacterial mixture is therefore efficient for the practical biodesulfurization of diesel oil.
College of Environment Sciences and Engineering, Nankai University, Weijin Road 94, Tianjin 300071, China.
Guo-Qiang
GQ
Li
Shan-Shan
SS
Li
Shi-Wei
SW
Qu
Qing-Kun
QK
Liu
Ting
T
Ma
Lin
L
Zhu
Feng-Lai
FL
Liang
Ru-Lin
RL
Liu
D005742:Gasoline; D033601:Gordonia Bacterium / Q000378:metabolism*; D012240:Rhodococcus / Q000378:metabolism*; D013379:Substrate Specificity; D013455:Sulfur / Q000378:metabolism*
D005742:Gasoline; D013455:Sulfur