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NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Biotechnology (IJBT) >
IJBT Vol.02 [2003] >
IJBT Vol.02(2) [April 2003] >
| Title: | Decolourization and Biodegradation of Reactive Azo Dyes by Mixed Culture |
| Authors: | Vijaya, P P
Padmavathy, P
Sandhya, S |
| Keywords: | Azoreductase
Azo dyes
Decolourization
Biodegradation |
| Issue Date: | Apr-2003 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Synthetic
dyes, azo dye in particular, are widely found in the effluents from textile
industries. The persistence
and
toxicity of these compounds cause adverse impact in the receiving streams. A
mixture of isolated cultures, from
domestic
sewage treatment plant was found to decolourize reactive azo dyes, Red RB, Blue
M2B and Yellow, efficiently
in
the absence of added external nitrogen source. After shaking incubation for 48
hrs, mixture of cultures removed
these
dyes and decolourization was 95% for Red RB and Blue M2B and 50% for Yellow.
The mixed culture
could
degrade 500 mgll Red RB efficiently with the release of 84.9 mgll of ammonia.
There was also degradation of
100
mgll of Blue M2B and 50 mgll of Yellow dyes but the release of ammonia was not
observed in Blue M2B and
Yellow.
Decolourization was remarkably enhanced when peptone was used in the medium.
Azoreductase activity was
high
in the presence of reactive azo dyes and the enzyme could decolourize the
reactive dyes much faster when decolourization
was studied as cell free extract in the presence of
individual dyes. |
| Page(s): | 259-263 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0967 (Online); 0972-5849 (Print) |
| Source: | IJBT Vol.02(2) [April 2003]
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