氢氧化钠预处理厌氧消化的埃塞俄比亚画眉草秸秆的生物甲烷生产和物理化学特性。
Biomethane production and physicochemical characterization of anaerobically digested teff (Eragrostis tef) straw pretreated by sodium hydroxide.
机构信息
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, No. 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China; College of Natural Science, Arba Minch University, Arba Minch, Ethiopia.
Centre for Resource and Environmental Research, Beijing University of Chemical Technology, No. 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
出版信息
Bioresour Technol. 2015 Apr;181:214-9. doi: 10.1016/j.biortech.2015.01.054. Epub 2015 Jan 24.
The biogas production potential and biomethane content of teff straw through pretreatment by NaOH was investigated. Different NaOH concentrations (1%, 2%, 4% and 6%) were used for each four solid loadings (50, 65, 80 and 95 g/L). The effects of NaOH as pretreatment factor on the biodegradability of teff straw, changes in main compositions and enhancement of anaerobic digestion were analyzed. The result showed that, using 4% NaOH for pretreatment in 80 g/L solid loading produced 40.0% higher total biogas production and 48.1% higher biomethane content than the untreated sample of teff straw. Investigation of changes in chemical compositions and physical microstructure indicated that there was 4.3-22.1% total lignocellulosic compositions removal after three days pretreatment with NaOH. The results further revealed that NaOH pretreatment changed the structural compositions and lignin network, and improved biogas production from teff straw.
通过 NaOH 预处理研究了埃塞俄比亚画眉草秸秆的沼气产量潜力和生物甲烷含量。分别使用 4 种不同的 NaOH 浓度（1%、2%、4%和 6%）对 4 种不同的固载量（50、65、80 和 95 g/L）进行预处理。分析了 NaOH 作为预处理因素对埃塞俄比亚画眉草秸秆生物降解性、主要成分变化和增强厌氧消化的影响。结果表明，在 80 g/L 的固载量下使用 4%的 NaOH 进行预处理，比未经处理的埃塞俄比亚画眉草秸秆样本的总沼气产量提高了 40.0%，生物甲烷含量提高了 48.1%。化学成分和物理微观结构的变化研究表明，NaOH 预处理 3 天后，总木质纤维素成分去除率为 4.3-22.1%。结果进一步表明，NaOH 预处理改变了结构成分和木质素网络，提高了埃塞俄比亚画眉草秸秆的沼气产量。
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