Preliminary studies on fungal treatment of sugarcane straw for organosolv pulping

M. B.W. Saad, L. R.M. Oliveira, R. G. Cândido, G. Quintana, G. J.M. Rocha, A. R. Gonçalves

    Research output: Contribution to journalArticlepeer-review

    60 Scopus citations

    Abstract

    This work reports the effect of fungal pretreatment of sugarcane straw in the performance of the treated pulps. Fermentation time, fungal mycelium load and pretreatment scale were studied in the fungal treatment, and the best conditions were 15 days with 250 mg kg-1 fungal mycelium per straw weight causing high lignin decomposition. At the largest scale tested (50 g straw) lignin degradation exceeded cellulose degradation by 2.4-fold. Acetosolv pulping was carried out in a tank reactor at 120 °C. The pulping kinetics showed that for biopulps the final lignin content was around 7.5% with a reduction of 40% in the pulping time to reach 12.5% pulp lignin, besides the factorial design showed that the biological pretreatment had a positive effect on the acetic acid reduction (21.5 wt.%) during pulping process.

    Original languageEnglish
    Pages (from-to)220-225
    Number of pages6
    JournalEnzyme and Microbial Technology
    Volume43
    Issue number2
    DOIs
    StatePublished - 5 Aug 2008

    Bibliographical note

    Funding Information:
    The authors wish to thank technical assistance of Cibele Oliveira, Jussara Canilha, José Silva and José Tavares. This research has been supported by FAPESP, CNPq and CAPES.

    Keywords

    • Biological pretreatment
    • Biopulping
    • Organosolv pulping
    • Sugarcane straw

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