Hydrolysis and acidification of grass silage in leaching bed reactors

被引：33

作者：

Xie, S. ^{[1
,2
]}

Lawlor, P. G. ^{[3
]}

Frost, J. P. ^{[4
]}

Wu, G. ^{[5
]}

Zhan, X. ^{[1
,2
]}

机构：

[1] Natl Univ Ireland, Coll Engn & Informat, Galway, Ireland

[2] Natl Univ Ireland, Ryan Inst, Galway, Ireland

[3] Teagasc, Pig Dev Dept, Anim & Grassland Res & Innovat Ctr, Fermoy, Co Cork, Ireland

[4] Agri Food & Biosci Inst, Hillsborough, Co Down, North Ireland

[5] Tsinghua Univ, Grad Sch Shenzhen, Shenzhen 518055, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2012年 / 114卷

关键词：

Acidification yield; Anaerobic digestion; Grass silage; Hydrolysis yield; Leaching bed reactor; ANAEROBIC-DIGESTION; METHANE PRODUCTION; CO-DIGESTION; WASTE-WATER; MANURE; PH; ACIDOGENESIS; SYSTEM;

D O I：

10.1016/j.biortech.2012.03.008

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

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 1.0 kg volatile solids (VS)/m(3)/clay. 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 32 days. 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. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：406 / 413

页数：8

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