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Title: Influence of pH, temperature and cultural media on decolorization of synthetic dyes through spent substrate of different mushrooms
Authors: Ahlawat, O.P.
Singh, Rajender
Keywords: Agaricus bisporus
Dye decolorization
Lentinula edodes
Pleurotus sajor-caju
Spent mushroom substrate
Issue Date: Dec-2009
Publisher: CSIR
Abstract: Spent substrate of Agaricus bisporus, Pleurotus sajor-caju and Lentinula edodes was evaluated for decolorization of 4 different dyes under different cultural conditions (media, incubation temperature and medium pH). Potato dextrose broth media supported highest decolorization (90% of Rhodamine B and Methyl Violet 2B, 93% of Chicago Sky Blue 6B and 88% of Quinaldine Red) after 3 days of incubation with P. sajor-caju spent substrate. Optimum pH requirements were 7.0 and 10.0 for Rhodamine B and Methyl Violet 2B with spent substrate of L. edodes, while 4.0 and 7.0 with A. bisporus and P. sajor-caju. However, for Chicago Sky Blue 6B and Quinaldine Red, it was 4.0 and 7.0 for spent substrates of all 3 mushrooms. Spent substrate of A. bisporus supported highest decolorization of Rhodamine B (93-95%) and Methyl Violet 2B (91-100%), followed by L. edodes + P. sajor-caju. Temperatures of 25 and 35oC were most effective for decolorization of Rhodamine B (90%) and Methyl Violet 2B (97%) with spent substrate of A. bisporus alone. In case of Chicago Sky Blue 6B and Quinaldine Red, temperature requirement for decolorization was same but with spent substrate of L. edodes, P. sajor-caju and L. edodes + A. bisporus for Chicago Sky Blue 6B, and A. bisporus, P. sajor-caju and L.edodes + A. bisporus for Quinaldine Red.
Page(s): 1068-1074
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Source:JSIR Vol.68(12) [December 2009]

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