DBPapers
DOI: 10.5593/SGEM2014/B41/S17.009

BIOGAS PRODUCTION FROM GRASSES

A. Adamovics
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-15-5 / ISSN 1314-2704, June 19-25, 2014, Book 4, Vol. 1, 65-68 pp

ABSTRACT
Fodder galega (Galega orientalis Lam.) and red clover (Trifolium pratense) are fodder legumes having high productivity and capacity to fix atmospheric nitrogen, so reducing the need for N-fertilisers. Reed canary grass (Phalaris arundinacea) can be harvested during long periods without reseeding and without application of pesticides. Investigated dry matter yields were 9.6-11.2 t ha-1, 8-13 t ha-1 and 7-11 t·ha-1 for galega, red clover and reed canary grass respectively. Methane yields obtained in digesters were 218.6 l·kgV0S -1 from cow’s manure (control) and 384.2 l·kgVSd -1, 309.2 l·kg l·kgVSd -1, 244 l·kg l·kgVSd -1 from different galega-cow’s manure mixtures. Estimated volumes of methane released from galega haylage, in dependence of high and low organic load, were 46.8 and 119.6 l·kgVSd -1 respectively. Methane production from red clover was 245.4 and 222.8 l·kgVSd -1. Methane yield from reed canary grass fresh biomass was 141.1 and 126.7 l·kgVSd -1.

Keywords: Galega, reed canary grass, energy crops, biogas, methane.