数字农科院2.0

Evaluation of lignin inhibition in anaerobic digestion from the perspective of reducing the hydrolysis rate of holocellulose

文献类型： 外文期刊

作者： Li Pengfei;Liu Di;Pei Zhanjiang;Zhao Lixin;Shi Fengmei;Yao Zonglu;Li Wenzhe;Sun Yong;Wang Su;Yu Qiuyue;Chen Lei;Liu Jie

作者机构：

关键词： Anaerobic digestion; Anaerobic Digestion Model No. 1; Hydrolysis rate; Lignin inhibition

期刊名称： Bioresource Technology

ISSN： 0960-8524

年卷期： 2021 年 333 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： In this study, Anaerobic Digestion Model No. 1 (ADM1) were modified to simulate anaerobic digestion (AD) process of microcrystalline cellulose (MCC) and five lignocellulosic substrates, with the goal of predicting the hydrolysis rates of holocellulose fractions in environments with and without lignin inhibition. After model verification, the hydrolysis rate constant of MCC, i.e., the hydrolyzability of cellulose without lignin inhibition, was 3.227 d−1, while those of the holocellulose fractions of five lignocellulosic substrates (I_khyd) were in the range of 1.270 d−1 to 3.364 d−1 (average of 2.242 d−1), which demonstrated remarkable suppression of holocellulose hydrolysis by lignin. Lignin inhibition index (LII) was proposed as an indicator to intuitively quantify and characterize the lignin inhibitory strength in a specific substrate. A series of factors with the potential to affect the LII were analyzed sequentially. This study provides an advanced understanding of the participation and behavior of lignin in the AD process. © 2021 Elsevier Ltd

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