| dc.description.abstract | In this study, a technologically and economically biological method called
bioleaching was conducted using four bacteria Micrococcus luteus, Ralstonia
pickettii, Bordetella trematum, and Lysinibacillus to degrade heavy metals from
sewage sludge. The effects of pretreatments on the efficiency of bioleaching
process were examined. These pretreatments were fresh sludge, dried sludge,
and sterilized sludge. The highest Cr leaching efficiency in sterilized sludge, dried
sludge and fresh sludge is 68.44%, 76.26%, 90.83% as compared with initial
concentration respectively. Besides, the highest Zn bioleaching efficiency in
sterilized sludge, dried sludge and fresh sludge is 44.32%, 88.06%, 95.92% as
compared with initial concentration respectively. In which, the most effective
metals solubilization was achieved with fresh sludge due to the good adaptability
to natural condition.
Key words:
Sulfur Oxidizing Bacteria (SOB),
Bioleaching,
Pretreatment | en_US |
