Biosorpsi Dan Reduksi Krom Limbah Penyamakan Kulit Dengan Biomassa Fusarium SP Dan Aspergillus Niger (Biosorpstion and Reduction of Chromium Bearing Tannery Wastewater Using the Biomass of Fusarium SP. and Aspergillus Niger)

摘要

The objectives of this research was to study the biosorption and reduction of chromium bearing tannery wastewater using biomass of Fusarium sp and Aspergillus Niger. Fusarium sp was used to investigate bioaccumulation and reduction of chromium in K2 Cr2O7 solution and solution containing sludge of leather tanning waste, and aspergillus Niger was used to investigate biosorption of Cr(III) and Cr(VI) in solution. Fusarium sp was grown on sterilized potato extrose liquid medium, added with K2Cr2O7solution or sludge of leather tanning waste solution. Chromium content of Fusarium sp biomass was determined by dihenyl carbazide method. Aspergillus Niger was grown in potato dextrose agar (PDA) solid medium for 5 days and then transferred to liquid medium containing bacto dextrose, bacto pepton and micronutrien. The biomaas was dried, and then ground and sieved at 150 um. The powder was used to remove Cr(III) and Cr(IV)from solution, The result indicated that fusarium sp biomass could be used to remove chromium from solution containing K2Cr2O7 or sludge of leather tanning waste. Longer incubation time increased chromium absorption by Fusarium sp biomass. Fusarium sp was able to reduce Cr9VI) to Cr(III). the biomass of Aspergillus Niger could be used to remove chromium from solution. The best result was obtained from 100 mg/l initial concentration of chromium pH 2.0, 0.1 g biomass weight, and 12 hours contact time, i.e. 96.23% for Cr(III) and 96.30% for Cr(VI), respectivey.