Abstract：
: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.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Feng S,Yang H,Wang Wdoi
10.1016/j.biortech.2015.09.054subject
Has Abstractpub_date
2016-01-01 00:00:00pages
186-93eissn
0960-8524issn
1873-2976pii
S0960-8524(15)01333-4journal_volume
200pub_type
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