of azo, heterocyclic and reactive dyes using spent mycelium substrate of Hypsizygus
R. Ranjini and T.
Microbiology, Centre for Post Graduate Studies, Jain University,
Bangalore-560 011, India
Author E-mail: email@example.com
26 March 2014
27 October 2014
14 January 2015
of Hypsizygus ulmarius to generate spent mycelium substrate (SMS) for dye
decolourization gave better yield, biological efficiency, fruit width and
moisture content (145 gm, 33%, 4 cm, 91%) on paddy straw as compared to
coconut husk (59 gm, 21%, 3 cm, 90%). Solid-phase decolourization of Congo
red (Azo dye) and Methylene blue (Heterocyclic dye) showed that maximum
decolourization (3.31), measured as Decolourization Index, occurred at dye
concentration of 25 mg l-1, while in Solochrome black (Reactive
dye), it was at 100 mg l-1 (1.7). Time taken for maximum
decolourization was 10 days in Congo red and Solochrome black; 20 days in
Methylene blue. Decolourization Index was maximum in Methylene blue (3.1),
followed by Congo red (1.9) and Solochrome black (1.2). Liquid-phase
decolourization of Methylene blue and Solochrome black showed that maximum
decolourization (62.5%) measured as percent decolourization occurred at 25 mg
l-1, while it was at 50 mg l-1 (36%) for Congo red.
Time taken for maximum decolourization for all three dyes was 10 days. During
this period, the percent decolourization was maximum in Methylene blue
(91.3%), followed by Solochrome black (82.2%) and Congo red (79.7%).
Decolourization potential in solid-phase was observed till 100 mg l-1
and day 25 for all the three dyes, however, in liquid-phase it was observed
till 50 mg l-1 and day 20 for Congo red, 75 mg l-1 and
day 10 for Solochrome black, 100 mg l-1 and day 20 for Methylene
blue. Maximum laccase was produced on day 25 during decolourization of 25 mg
l-1 Congo red, while maximum Manganese peroxidase was noted on day
20 at 50 mg l-1 Congo red.
dye, Heterocyclic dye, Hypsizygus ulmarius, Reactive dye, Spent
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