SEPARATION OF METALS FROM SPENT CATALYSTS WASTE BY BIOLEACHING PROCESS
ABSTRACT: A kind of waste that
hard to be treated is a metal containing solid waste. Leaching method is one
thealternative waste treatment. But there still left an obstacle on this
method, it is the difficulty to find theselective solvent for the type of
certain metal that will separated. Bioleaching is one of the carry
ablealternative waste treatments to overcome that obstacle. Bioleaching is a
metal dissolving process orextraction from a sediment become dissolve form
using microorganisms. On this method, it is not amust to use a selective solvent
to extract metal. This research have general purpose to separate certainmetal
contains from a solid waste by bioleaching method, and the special purpose on
this research areto know influence of bioleaching time to the dissociated yield
metal, and to know selectivity of themicroorganisms to the metal containing
spent catalyst waste on bioleaching process. Aqua DM is usedas the solvent and
this experiment varied spent catalysts as solid waste from several raw material
(I, II,and III raw material), bioleaching time ( 5, 10, 15 days), and types of
microorganisms (EscherichiaColi and Aspergillus niger), with amount of
microorganisms (10% from the total work volume), andbioleaching temperature (37
oC). Metal concentration is used for the analysis on this research. Fromthe
results of this research, it is known that the bioleaching time influences
metal concentration inrafinat, the longer time of bioleaching, the bigger of
the metal concentration. The best metal yield Ni(i.e: 1.35% b/b) was reached
from raw material III. Using Aspergilus niger fungi within 15 days.Generally,
the yield of Cu, Zn, and Ni on bioleaching process using Aspergillus niger
fungi was betterthen those were gained by Escherichia coli, except Cr
Penulis: Ronny Kurniawan,
Sirin Fairus, Tria Liliandini, M.Febrian
Kode Jurnal: jpkimiadd100191
