芦笋秸秆作为一种新型木质纤维素生物质原料用于厌氧消化：通过碱性预处理提高水解速率、甲烷产量和生物降解性。
Asparagus stem as a new lignocellulosic biomass feedstock for anaerobic digestion: increasing hydrolysis rate, methane production and biodegradability by alkaline pretreatment.
机构信息
State Key Lab of Pollution Control and Reuse, Tongji University, Shanghai 200092, China.
State Key Lab of Pollution Control and Reuse, Tongji University, Shanghai 200092, China.
出版信息
Bioresour Technol. 2014 Jul;164:78-85. doi: 10.1016/j.biortech.2014.04.070. Epub 2014 May 4.
Recently, anaerobic digestion of lignocellulosic biomass for methane production has attracted considerable attention. However, there is little information regarding methane production from asparagus stem, a typical lignocellulosic biomass, by anaerobic digestion. In this study, alkaline pretreatment of asparagus stem was investigated for its ability to increase hydrolysis rate and methane production and to improve biodegradability (BD). The hydrolysis rate increased with increasing NaOH dose, due to higher removal rates of lignin and hemicelluloses. However, the optimal NaOH dose was 6% (w/w) according to the specific methane production (SMP). Under this condition, the SMP and the technical digestion time of the NaOH-treated asparagus stem were 242.3 mL/g VS and 18 days, which were 38.4% higher and 51.4% shorter than those of the untreated sample, respectively. The BD was improved from 40.1% to 55.4%. These results indicate that alkaline pretreatment could be an efficient method for increasing methane production from asparagus stem.
最近，利用木质纤维素生物质进行厌氧消化生产甲烷引起了相当大的关注。然而，关于通过厌氧消化从芦笋秸秆（一种典型的木质纤维素生物质）生产甲烷的信息却很少。在这项研究中，研究了碱性预处理芦笋秸秆的能力，以提高水解率和甲烷产量，并提高生物降解性（BD）。由于木质素和半纤维素的去除率更高，水解率随 NaOH 剂量的增加而增加。然而，根据特定甲烷产量（SMP），最佳 NaOH 剂量为 6%（w/w）。在这种条件下，NaOH 处理的芦笋秸秆的 SMP 和技术消化时间分别为 242.3 mL/gVS 和 18 天，分别比未处理样品高 38.4%和短 51.4%。BD 从 40.1%提高到 55.4%。这些结果表明，碱性预处理可能是提高芦笋秸秆甲烷产量的有效方法。
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