The effects of hydrothermal conditioning, detergent and mechanical pressing on the isolation of the fibre-rich press-cake fraction from a range of grass silages

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• 作者：C. King^a ; ^b ; J. McEniry^a ; P. O'Kiely^a ; ^{padraig.okiely@teagasc.ie} ; M. Richardson^b
• 关键词：Grass silage ; Grass species ; Harvest date ; Hydrothermal conditioning ; Press-cake
• 刊名：Biomass and Bioenergy
• 出版年：2012
• 期刊代码：3_09619534
• 类别：pw
• 出版时间：July, 2012
• 卷：42
• 期：Complete
• 页码：179-188
• 文件大小：294 K

摘要

The initial stage of a Green Biorefinery involves the fractionation of plant biomass into a fibre-rich press-cake and a nutrient-rich press-juice that are subsequently used to provide energy, chemicals and materials. However, limited information has been published to date on the factors influencing the fractionation of green biomass. Perennial ryegrass and cocksfoot silages harvested at two stages of maturity were subjected to hydrothermal conditioning at three temperatures (20, 40 and 60聽掳C) with or without detergent. In a second experiment, Italian ryegrass and timothy silages harvested at three stages of maturity were subjected to three washing steps (30聽min at 60聽掳C in a 3 water聽+聽detergent (30聽g聽L^鈭?): 1 silage ratio; undertaken 1, 2 or 3 times), before being mechanically pressed at three different pressures (1.5, 3.0 or 4.5聽MPa). Overall, repeated washing (up to 2 washing steps) and mechanical pressing (3.0聽MPa) proved the most effective treatments for the removal of solubles from a range of grass silages and in the isolation of a fibre-rich press-cake fraction.