Abstract：
:A technologically and economically feasible process called bioleaching was used for the removal of heavy metals from livestock sludge with indigenous sulfur-oxidizing bacteria in this study. The effects of sludge solids concentration on the bioleaching process were examined in a batch bioreactor. Due to the buffering capacity of sludge solids, the rates of pH reduction, ORP rise and metal solubilization were reduced with the increase of the solids concentration. No apparent influence of solids concentration on sulfate produced by sulfur-oxidizing bacteria was observed when the solids concentration was less than 4% (w/v). A Michaelis-Menten type of equation was able to well describe the relationship between solids concentration and rate of metal solubilization. Besides, high efficiencies of metal solubilization were achieved after 16 d of bioleaching. Therefore, the bioleaching process used in this study could be applied to remove heavy metals effectively from the livestock sludge.
journal_name
Chemospherejournal_title
Chemosphereauthors
Chen SY,Lin JGdoi
10.1016/j.chemosphere.2003.08.009subject
Has Abstractpub_date
2004-01-01 00:00:00pages
283-9issue
3eissn
0045-6535issn
1879-1298pii
S0045-6535(03)00802-6journal_volume
54pub_type
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