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Isolation and Screening of Potential Fungi for Decolourization of Distillery Wastewaters

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posted on 2008-02-21, 00:00 authored by D Pant, Alok AdholeyaAlok Adholeya
The wastewater from molasses based distilleries is highly coloured with a high oxygen demand. Microbial decolourization is an environment-friendly and cost-competitive approach to treat this effluent. A broad screening of 32 fungi isolated from different environments on solid media and in broth resulted in the selection of 8 fungi, which were active in decolourizing the poly R-478 model system and capable of growing on and decolourizing post anaerobically treated distillery wastewaters. Phanerochaete chrysosporium was used as control organism for comparison. Effluent decolourization was carried out in static conditions with and without any additional carbon source. Wheat straw, bagasse and wood chips were used as immobilizing substrate offering the possibility of scaling-up the process. Tests on distillery effluent diluted at different COD concentrations revealed that all isolates performed well even at COD of 25 g I-1 (50% diluted effluent). Six isolates obtained from effluent contaminated soils performed better than the commercial strain, Phanerochaete chrysosporium MTCC 787 and displayed decolourization ranging from 68% to 90%. Removal in colour was accompanied by marked reduction in COD (88%) and BOD (94%) of the effluent. There was a substantial reduction in pH of the effluent to a range of 3.5 to 7.0 from a maximum of 9.0. © 2006 Wiley-VCH Verlag GmbH & Co. KGaA.

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Title of book

Modern Multidisciplinary Applied Microbiology: Exploiting Microbes and Their Interactions

Pagination

95 - 102

ISBN-13

9783527316113

ISBN-10

3527316116

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