Sunday, May 4, 2008
3-13

Enzymatic hydrolysis of fibre fractions from manure

Kim Skov Jensen and Henning Jørgensen. Forest and Landscape Denmark, University of Copenhagen, Rolighedsvej 23, DK-1958 Frederiksberg C, Denmark

More than 30 million ton of manure with around 6% dry matter is produced each year in Denmark, giving almost two million tons of fibre fractions that could potentially be used for bioethanol production. High dry matter content is an important factor in commercialising the hydrolysis of biomass due to restrictions in water and energy use and thereby also reduction in process costs. Different methods are commercial available for separating manure into fibre and liquid fractions by chemical flocculation or sieving and pressing. In order to investigate the potential role of manure, as a source of biomass for e.g. bioethanol production, enzymatic hydrolysis has been performed on three different fibre fractions. The fibres were pretreated by either chopping, autoclaving at 120oC or bomb treated at 200oC in oil bath. The convertibility of the various fractions after pretreatment was then investigated by enzymatic hydrolysis. Large amounts of cellulose are converted to glucose, in the bomb treated samples, compared to the other pre treatments. The latest results and the potential of bioethanol production from fibre fractions will be presented.

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