Concentration of fungal ligninolytic enzymes by ultrafiltration and their use in distillery effluent decolorization |
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Authors: | Deepak Pant Alok Adholeya |
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Institution: | (1) Centre of Bioresources and Biotechnology, TERI University, DS Block, India Habitat Centre, Lodhi Road, New Delhi, 110003, India;(2) Present address: VITO, Flemish Institute for Technological Research, Boeretang 200, 2400 Mol, Belgium;(3) Biotechnology and Management of Bioresources Division, The Energy and Resources Institute, DS Block, India Habitat Centre, Lodhi Road, New Delhi, 110003, India |
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Abstract: | Extracellular ligninolytic enzymes secreted by seven different fungi grown under solid-state fermentation using agro-residue
as substrate were extracted through successive extractions. In general, most of the enzymes were recovered during first and
second extractions. These extractants were then subjected to ultrafiltration using a 10 kDa membrane for further concentration.
The permeates collected after every filtration and the final retentate were analyzed for protein and enzymes. In all the isolates,
enzyme concentration was maximum in first retentate, which reduced significantly in second, third, and fourth retentate. Maximum
per unit laccase (14.44 U g−1) and MnP production (142.2 U g−1) was observed in Fusarium verticillioides TERIDB16 while maximum LiP production (137.42 U g−1) was in Alternaria gaisen TERIDB6. The retentate was further used for checking its decolorization efficiency of undiluted distillery effluent. The
maximum decolorization (37%) was obtained using the enzyme extract of Pleurotus florida EM1303. |
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