Instituto de la Grasa, Consejo Superior de Investigaciones Científicas (CSIC), Avenida Padre García Tejero, 4 41012 Seville, Spain.
Water Sci Technol. 2013;67(2):410-7. doi: 10.2166/wst.2012.586.
Due to the chemical and physical structure of a lignocellulosic biomass, its anaerobic digestion (AD) is a slow and difficult process. In this paper, the results obtained from a batch biochemical methane potential (BMP) test and fed-batch mesophilic AD assays of sunflower oil cake (SuOC) are presented. Taking into account the low digestibility shown during one-stage experiments the methane yield decreased considerably after increasing the organic loading rate (OLR) from 2 to 3 g VS L(-1) d(-1), SuOC was subjected to a two-stage AD process (hydrolytic-acidogenic and methanogenic stages), in two separate reactors operating in series where the methanogenic stage became acidified (with >1,600 mg acetic acid L(-1)) at an OLR as low as 2 g VS L(-1) d(-1). More recently, BMP assays were carried out after mechanical, thermal, and ultrasonic pre-treatments to determine the best option on the basis of the methane yield obtained.
由于木质纤维素生物质的化学和物理结构，其厌氧消化（AD）是一个缓慢而困难的过程。本文介绍了向日葵油渣（SuOC）分批生物甲烷潜力（BMP）试验和分批中温 AD 试验的结果。考虑到一阶段实验中表现出的低消化率，当有机负荷率（OLR）从 2 增加到 3 g VS L(-1) d(-1)时，甲烷产量大大降低，SuOC 经过两段 AD 工艺（水解-产酸和产甲烷阶段），在两个串联运行的单独反应器中进行，其中产甲烷阶段在低至 2 g VS L(-1) d(-1)的 OLR 下酸化（超过 1600 mg 乙酸 L(-1))。最近，在进行机械、热和超声预处理后进行了 BMP 试验，以根据获得的甲烷产量确定最佳方案。
