Abstract
Apple pomace, an abundant accessible source of carbohydrate platform chemicals, is refractory to cellulase degradation because of the main barrier problem of pectin constitute. A rapid and portable method for the coproduction of pectin and fermentable sugars was developed using the pretreatment of acetic acid, followed by enzymatic hydrolysis. Compared with pectinase, acetic acid pretreatment provided the highest pectin yield of 19.1% and the highest enzymatic hydrolysis yield from apple pomace. The acidic pretreated apple pomace cellulose was easily and completely hydrolyzed into fermentable sugars. More than 98.2% conversion of cellulose was achieved in a batch hydrolysis using a cellulase loading of 25 FPU/g cellulose and 10% total solids without any special strategies. A mass balance analysis showed that 95.5 g pectin and 110.2 g fermentable sugars were produced from 500-g oven-dried apple pomace. The integrated process is suggestive of environment-friendly and recyclable methods for the industrial utilization of apple pomace.
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The research was supported by the National Natural Science Foundation of China (31370573). Also, the authors gratefully acknowledge financial support from the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
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Luo, J., Xu, Y. Comparison of Biological and Chemical Pretreatment on Coproduction of Pectin and Fermentable Sugars from Apple Pomace. Appl Biochem Biotechnol 190, 129–137 (2020). https://doi.org/10.1007/s12010-019-03088-w
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DOI: https://doi.org/10.1007/s12010-019-03088-w