Biological treatment of substrate
Fifty grams of substrate was taken in 1 L conical flask and
moistened with 60 ml of Vogel’s medium and autoclaved at
121 C for 15 min. After autoclaving, the contents of the flask
were allowed to cool at room temperature. After cooling the
flask was inoculated with 10 ml spore suspension of T. viride-
IR05 and incubated at 30 C for seven days. The contents of the
flask were mixed each day during incubation. After seven days
of incubation the substrate was washed, dried and used as a
biologically treated sample source for enzyme production.
2.4. Scanning electron microscopy of substrate
Samples of untreated and treated sugarcane bagasse were
oven-dried at 50 C for 1 h and thick layers were supported in
the sample holder fixed on a carbon ribbon. This assembly
was maintained in vacuum-desiccators until the analysis. The
SEM type S-3700 microscope (Hitachi) was used for observing
the bagasse fibers in both treated and untreated samples.
2.5. Inoculum preparation
In present study, conidial inoculum was used. The spore
suspension was prepared by adding 10 ml of sterile distilled
water in to a 7 days old slant culture aseptically. Conidial
clumps were broken using inoculation needle. The tube was
shaken to make homogeneous mixture of conidial
suspension.