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Autohydrolysis-explosion as pretreatment for the enzymic saccharification of sunflower seed hulls

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Summary

Autohydrolysis of sunflower seed hulls at 200°C for 5 min followed by explosive defibration solubilized >80% of the total hemicellulose (heteroxylan) and 85% of the pectic substances. The remaining residue, which consisted of cellulose (38%), lignin (45%) and residual heteroxylan (7%), was highly susceptible to hydrolysis by cellulases (Trichoderma reesei C-30, Meicelase and Onozuka 3S). Enzymic digests containing 10% (w/v) substrate and 20 FPU/g pretreated hull resulted in sugar yields of >40% within 24h. This yield was increased toca. 70% when digests were supplemented with exogenous β-glucosidase. The method has potential use in the bioconversion of sunflower seed hulls into chemicals.

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Authors and Affiliations

  1. Division of Chemical and Wood Technology, CSIRO, Private Bag 10, 3168, Clayton, Victoria, Australia

    R. F. H. Dekker & A. F. A. Wallis

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  1. R. F. H. Dekker
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  2. A. F. A. Wallis
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Dekker, R.F.H., Wallis, A.F.A. Autohydrolysis-explosion as pretreatment for the enzymic saccharification of sunflower seed hulls. Biotechnol Lett 5, 311–316 (1983). https://doi.org/10.1007/BF01141131

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  • DOI: https://doi.org/10.1007/BF01141131

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