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Bacterial cellulase treatment for enhancing reactivity of pre-hydrolysed kraft dissolving pulp for viscose

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Abstract

To improve the process economy of reactivity improvement, crude cellulase from Bacillus subtilis was employed for the treatment and significant dissolving pulp properties were analyzed. With increase in enzyme dose from 0.25 to 2 U/g o.d. pulp, improvement in Fock reactivity and alkali solubilities (S10 and S18) were observed with simultaneous reduction in viscosity and yield. Fourier transform infrared spectroscopy and scanning electron microscopy were used to observe the molecular level effects on dissolving grade pulp. The most suitable cellulase dose for reactivity improvement with lowering of viscosity was 0.25 U/g o.d. pulp. With increases in enzyme dose, alkali solubilities (S10 and S18) of dissolving pulp showed continuous increment, while alpha-cellulose of pulp showed reduction due to chain scission of long cellulose fiber fraction.

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Acknowledgements

The authors are thankful to the Director of the Avantha Centre for Industrial Research & Development, Yamuna Nagar, Haryana, India, for providing the facilities to complete this work.

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Authors and Affiliations

  1. Department of Biotechnology, Kurukshetra University, Kurukshetra, Haryana, 136 119, India

    Chakarvati Sango & Jitender Sharma

  2. Avantha Centre for Industrial Research and Development, Paper Mill Campus, Yamuna Nagar, Haryana, 135 001, India

    Prabhjot Kaur & Nishi K. Bhardwaj

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  1. Chakarvati Sango
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  2. Prabhjot Kaur
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  3. Nishi K. Bhardwaj
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  4. Jitender Sharma
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Correspondence to Jitender Sharma.

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Sango, C., Kaur, P., Bhardwaj, N.K. et al. Bacterial cellulase treatment for enhancing reactivity of pre-hydrolysed kraft dissolving pulp for viscose. 3 Biotech 8, 271 (2018). https://doi.org/10.1007/s13205-018-1293-0

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