文献类型：期刊文献

英文题名：Enhanced methane production from poplar sawdust via super diluted mixture alkali pretreatment in high-solid anaerobic digestion: Reduced water and chemical consumption

作者：Yang, Jing[1] Xie, Jingcong[1] Zhao, Jian[1] Zhang, Ning[1] Wang, Kui[1] Jiang, Jianchun[1] Xu, Hao[1] Kaili, Zhang[2]

第一作者：杨静

通信作者：Jiang, JC[1];Xu, H[1]

机构：[1]Chinese Acad Forestry, Natl Engn Res Ctr Low Carbon Proc & Utilizat Fores, Key Lab Biomass Energy & Mat,Natl Key Lab Dev & Ut, Key Lab Chem Engn Forest Prod,Inst Chem Ind Forest, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat, Int Innovat Ctr Forest Chem & Mat, Nanjing 210037, Peoples R China

年份：2026

卷号：208

外文期刊名：BIOMASS & BIOENERGY

收录：;EI(收录号：20255119717975);Scopus(收录号：2-s2.0-105024668617);WOS:【SCI-EXPANDED(收录号:WOS:001644846200001)】；

基金：This work was funded by the National Natural Science Foundation of China (No. 32401530) and Fundamental Research funds for the Central Nonprofit Research Institution of CAF (No. CAFYBB2021ZA003) .

语种：英文

外文关键词：Biogas; Pretreatment; Poplar sawdust; Anaerobic digestion

摘要：Conventional pretreatment methods for lignocellulosic biomass in high-solid anaerobic digestion (HS-AD) are often limited by high economic costs and significant environmental contamination. A novel super diluted mixture alkali (SDMA) pretreatment has previously enhanced biogas production from agricultural residues energy-efficiently and sustainably. This study develops a targeted SDMA pretreatment for recalcitrant poplar sawdust (PS) to validate its broad applicability and effectiveness for HS-AD across diverse lignocellulosic feedstocks. Optimized SDMA pretreatment (2 g/L NH3+ 3 g/L KOH+ 3 g/L NaOH) conducted at 120 degrees C in an autoclave for 60 min achieved a methane yield of 221.3 +/- 17.4 mL CH4/g VS, representing an 188.5 % improvement over untreated PS and a 27.6 % enhancement compared with PS treated with 20 g/L NaOH (with filtering/washing). Organic acids in the SDMA-pretreated hydrolysate markedly enhanced biogas production from untreated PS. Additionally, incorporating biochar (5 mg/g TS) or FeCl3 (25 mg/g TS) into the AD system enabled energy-efficient SDMA pretreatment at 100 degrees C in a water bath. The operational reliability of this approach was empirically confirmed through a scaled-up verification using a 10-liter bioreactor. Compared with conventional 20 g/L NaOH pretreatment, SDMA pretreatment achieved respective reductions of similar to 60 % and 91.03 % in chemical consumption and water usage. These findings highlight the practical feasibility of SDMA pretreatment for large-scale, energy-efficient biogas production from diverse lignocellulosic feedstocks in the second-generation biogas industries.