Hydrolysis and acidification of grass silage in leaching bed reactors

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논문

Hydrolysis and acidification of grass silage in leaching bed reactors

학술지

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

저자명

Xie, S.; Lawlor, P.G.; Frost, J.P.; Wu, G.; Zhan, X.

초록

Hydrolysis and acidification of grass silage (GS) was examined in leaching bed reactors (LBRs) under organic loading rates (OLRs) of 0.5, 0.8 and 1.0kg volatile solids (VS)/m<SUP>3</SUP>/day. The LBRs were run in duplicate over five consecutive batch tests (Batch tests 1-5) to examine the effects of pH, leachate dilution and addition of inoculum on the process of hydrolysis and acidification. The highest GS hydrolysis yields of 52-58%, acidification yields of 57-60% and VS removals of 62-66% were obtained in Batch test 4. Increasing OLRs affected the hydrolysis yield negatively. In Batch test 4, the reduction of lignocellulosic materials was up to 74.4% of hemicellulose, 30.1% of cellulose and 9.3% of lignin within 32days. Cellulase activity can be used as an indicator for the hydrolysis process. Methane production from the LBRs only accounted for 10.0-13.8% of the biological methane potential of GS.

발행연도

2012

발행기관

Elsevier Applied Science

ISSN

0960-8524

권

114

페이지

pp.406-413

DOI

10.1016/j.biortech.2012.03.008