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Isolation and process parameter optimization of Aspergillus sp. for removal of chromium from tannery effluent
Shaili Srivastava1, Indu Shekhar Thakur
1Environmental Biotechnology Laboratory, Department of Environmental Sciences, College of Basic Sciences and Humanities, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttaranchal 263 145, India.
Abstract:
Five morphologically different fungi were isolated from leather tanning effluent in which Aspergillus sp. and Hirsutella sp. had higher potential to remove chromium. The potential of Aspergillus sp. for removal of chromium was evaluated in shake flask culture in different pH, temperature, inoculums size, carbon and nitrogen source. The maximum chromium was removed at pH 6, temperature 30 degrees C, sodium acetate (0.2%) and yeast extract (0.1%). Aspergillus sp. was applied in 2l bioreactor for removal of chromium, and it was observed that 70% chromium was removed after 3 days.
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