Abstract
The present study was aimed to evaluate the Methyltrioctylammonium Chloride (IL) and Sodium hydroxide effect on sugarcane bagasse (SB) structure and its subsequent utilization to produce cellulase from a thermophilic bacterium Bacillus aestuarii UE25. The strain was isolated from a crocodile pond of Manghopir, Karachi. Ten different factors affecting IL pretreatment of SB and cellulase production by UE25 were evaluated by Plackett-Burman design and three significant factors were optimized by employing Box Behnken design. Under optimum conditions, the strain produced 118.4 IU mL−1 of EG and 75.01 IU mL−1 of BGL that corroborated well with the predicted values by the model. Scanning electron microscopy, gravimetric analysis, Fourier transform infrared spectroscopy and NMR of SB revealed removal of lignin, decrease in cellulose content and structural changes in the SB after pretreatment and fermentation. The data provide prospects of utilizing this IL in comparison to imidazolium based IL for pretreatment of biomass.
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