BioChem - DOS

Bioconversion of industrial hemp to ethanol and methane: The benefits of steam pretreatment and co-production

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Kreuger, E.; Sipos, B.; Zacchi, G.; Svensson, S.E.; Bjornsson, L.

Several scenarios for ethanol production, methane production (by anaerobic digestion) and co-production of these, using autumn harvested hemp as substrate, were investigated and compared in terms of gross energy output. Steam pretreatment improved the methane production rate compared with mechanical grinding. The methane yield of steam pretreated stems was similar both with and without pre-hydrolysis with cellulolytic enzymes. Co-production of ethanol and methane from steam pretreated stems gave a high yield of transportation fuel, 11.1-11.7MJ/kg processed stem dry matter (DM); more than twice that of ethanol production alone from hexoses, 4.4-5.1MJ/kg processed stem DM. Co-production from the whole hemp plant would give 2600-3000L ethanol and 2800-2900m<SUP>3</SUP> methane, in total 171-180GJper10,000m<SUP>2</SUP> of agricultural land, based on a biomass yield of 16Mg DM. Of this, the yeast and enzymes from ethanol production were estimated to contribute 700m<SUP>3</SUP> (27GJ) of methane.

2011

Elsevier Applied Science

0960-8524

102

3

pp.3457-3465

10.1016/j.biortech.2010.10.126

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART55192041

Biofuel; Biogas; Lignocellulose; Energy crops; Cannabis sativa L.