期刊
BIORESOURCE TECHNOLOGY
卷 266, 期 -, 页码 322-334出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.06.072
关键词
Integrated biorefinery; Hydrothermal processing; Waste pomegranate peels; Pectin; Phenolics; Bioethanol
资金
- IRCC, IIT Bombay, India [13IRCCSG003]
- IITB-Monash Research Academy
- TATA Chemicals, Pune, Maharashtra, India
An integrated biorefinery, incorporating hydrothermal processing of waste pomegranate peels (WPP), was proposed for the acid and organic solvent-free simultaneous recovery of pectin and phenolics with bioethanol production. The hydrothermal treatment (HT) was optimized using Box-Behnken design and the maximum recovery of pectin (18.8-20.9%) and phenolics (10.6-11.8%) were obtained by hydrothermal treatment at 115 degrees C for 40 min with a liquid-solid ratio of 10. The WPP pectin was characterized by IR, H-1 NMR, and TGA which showed close similarity to commercial pectin. Depending on WPP cultivar type the degree of esterification, galacturonic acid content and molecular weight of pectin were in the range of 68-74%, 71-72%, and 131,137-141,538 Da, respectively. The recovered phenolics contained 57-60% punicalagin. Enzyme digestibility of WPP improved using HT with 177 g glucose produced per kg dry mass which was fermented to obtain 80 g ethanol with 88% of theoretical yield.
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