Enzymatic pretreatment of lignocellulosic wastes to improve biogas production

Waste Management
K ZiemińskiM Kowalska

Abstract

The effect of enzymatic pretreatment of sugar beet pulp and spent hops prior to methane fermentation was determined in this study. These industrial residues were subjected to enzymatic digestion before anaerobic fermentation because of high fiber content (of 85.1% dry matter (DM) and 57.7% DM in sugar beet pulp and spent hops, respectively). Their 24h hydrolysis with a mix of enzymatic preparations Celustar XL and Agropect pomace (3:1, v/v), with endoglucanase, xylanase and pectinase activities, was most effective. Reducing sugars concentrations in hydrolysates of sugar beet pulp and spent hops were by 88.9% and 59.4% higher compared to undigested materials. The highest yield of biogas was obtained from the enzymatic hydrolysate of sugar beet pulp (183.39 mL/d from 1g COD at fermenter loading with organic matter of 5.43 g COD/L × d). Fermentation of sugar beet pulp gave 19% less biogas. Methane fermentation of spent hops hydrolysate yielded 121.47 mL/d biogas from 1g COD (at 6.02 g COD/L × d, 13% more than from spent hops). These results provide evidence that suitable enzymatic pretreatment of lignocellulosic wastes improve biogas yield from anaerobic fermentation.

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Citations

Jan 16, 2014·Applied Biochemistry and Biotechnology·Wangliang LiGuangwen Xu
Sep 3, 2013·World Journal of Microbiology & Biotechnology·Zhikai ZhangGuangwen Xu
Dec 19, 2013·TheScientificWorldJournal·Michael Frei
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Oct 22, 2016·Applied Biochemistry and Biotechnology·Krzysztof Ziemiński, Monika Kowalska-Wentel
May 6, 2014·Applied and Environmental Microbiology·Camilo MuñozMariella Rivas
Nov 14, 2014·Journal of the Royal Society, Interface·Mailin MissonBo Jin
Jan 28, 2019·Reviews on Environmental Health·Bodjui Olivier AboQunhui Wang
Jan 7, 2021·Bioresource Technology·Deokyeol JeongSoo Rin Kim
May 13, 2021·Biotechnology Letters·Pradeep Puligundla, Chulkyoon Mok
Sep 8, 2018·Journal of Agricultural and Food Chemistry·Siqi WangMohammad Nabi

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