Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC), Avenida Padre García Tejero, 4, 41012 Seville, Spain.
Bioresour Technol. 2012 Nov;123:424-9. doi: 10.1016/j.biortech.2012.07.111. Epub 2012 Aug 8.
The aim of this study was to elucidate the effect of hydrothermal pretreatment at 25, 100, 150 and 200°C on fibre composition and the biomethane potential of sunflower oil cake (SuOC). An increase in pretreatment temperature from 25 to 200°C caused a decrease in hemicellulose content in the solid pretreated fraction from 13 to 6% while the lignin content increased by 16%. Soluble compounds also increased with temperature. Digestion of solid fractions from pretreatments at 25, 100, 150 and 200°C in batch assays at 35±1°C resulted in methane yields of 114±9, 105±7, 82±7 and 53±8mL CH(4) g(-1)COD(added), respectively. The corresponding methane yields for the liquid fractions were 276±6, 310±4, 220±15 and 247±10mL CH(4) g(-1)COD(added), respectively. Therefore the overall methane yield was highest for SuOC pretreated at 100°C; however, this value was only 6.5% higher than that achieved after pretreatment at 25°C.
本研究旨在阐明在 25、100、150 和 200°C 下水热处理对葵花油饼（SuOC）纤维成分和生物甲烷潜力的影响。预处理温度从 25°C 升高到 200°C，导致预处理固相中半纤维素含量从 13%下降到 6%，而木质素含量增加了 16%。可溶性化合物也随温度升高而增加。在 35±1°C 的分批实验中，对 25、100、150 和 200°C 预处理的固相进行消化，产生的甲烷产量分别为 114±9、105±7、82±7 和 53±8mL CH(4) g(-1)COD(添加)。相应的液体部分的甲烷产量分别为 276±6、310±4、220±15 和 247±10mL CH(4) g(-1)COD(添加)。因此，100°C 预处理的 SuOC 的总甲烷产量最高；然而，这一数值仅比 25°C 预处理高 6.5%。
