Insights to the effects of free cells on community structure of attached cells and chalcopyrite bioleaching during different stages.
The effects of free cells on community structure of attached cells and chalcopyrite bioleaching by Acidithiobacillus sp. during different stages were investigated. The attached cells of Acidithiobacillus thiooxidans owned the community advantage from 14thd to the end of bioprocess in the normal system. The community structure of attached cells was greatly influenced in the free cells-deficient systems. Compared to A. thiooxidans, the attached cells community of Acidithiobacillus ferrooxidans had a higher dependence on its free cells. Meanwhile, the analysis of key biochemical parameters revealed that the effects of free cells on chalcopyrite bioleaching in different stages were diverse, ranging from 32.8% to 64.3%. The bioleaching contribution of free cells of A. ferrooxidans in the stationary stage (8-14thd) was higher than those of A. thiooxidans, while the situation was gradually reversed in the jarosite passivation inhibited stage (26-40thd). These results may be useful in guiding chalcopyrite bioleaching.
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, People's Republic of China.
Shoushuai
S
Feng
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, People's Republic of China. Electronic address: fengss@jiangnan.edu.cn.
Hailin
H
Yang
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, People's Republic of China.
Wu
W
Wang
D042763:Acidithiobacillus / Q000166:cytology / Q000378:metabolism; D019149:Bioreactors / Q000382:microbiology*; D018914:Cells, Immobilized / Q000166:cytology / Q000378:metabolism; D003300:Copper / Q000737:chemistry / Q000378:metabolism
C012819:chalcopyrite; D003300:Copper
Attached cells; Chalcopyrite bioleaching; Community structure; Free cells