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Title: Decolorisation of textile dyes by Aspergillus ochraceus (NCIM-1146)
Authors: Saratale, G D
Kalme, S D
Govindwar, S P
Keywords: decolorisation
Aspergillus ochraceus
malachite green
textile dyes
repeated batch mode
Issue Date: Jul-2006
Publisher: CSIR
IPC CodeInt. Cl.8 C02F3/02; C02F103/30
Abstract: Aspergillus ochraceus (NCIM-1146) has ability to decolorize various xenobiotic dyes. Biodegradation of dyes was demonstrated by their decolorisation in the culture medium. The extent of biodegradation was determined by monitoring the decrease in absorbance of each dye. Malachite green decolorisation activity is affected by various conditions such as composition of media, concentration of dye, amount of mycelia and agitation. The durability of decolorisation activity under optimum conditions was investigated in repeated batch mode. An increase in the amount of mycelia positively affected the durability of decolorisation activity. The decrease in dye decolorisation capability of mycelia occurred with increasing dye concentration in repeated batch mode. Spectrophotometric data revealed that the process involved in decolorisation is through microbial metabolism but not biosorption. This study showed that fungal mycelia (A. ochraceus) could effectively be used as an alternative to the traditional physico-chemical process.
Page(s): 407-410
ISSN: 0975-0967 (Online); 0972-5849 (Print)
Source:IJBT Vol.05(3) [July 2006]

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