文献类型：期刊文献

英文题名：Formulating a fully converged biorefining chain with zero wastewater generation by recycling stillage liquid to dry acid pretreatment operation

作者：Zheng, Lixiang[1];Han, Xushen[1];Han, Tao[1];Liu, Gang[1];Bao, Jie[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：318

外文期刊名：BIORESOURCE TECHNOLOGY

收录：;EI(收录号：20203709159952);WOS:【SCI-EXPANDED(收录号:WOS:000593740600018)】；

基金：This work was supported by the National Natural Science Foundation of China (31961133006, 21978083) and the Shanghai Yangfan Program (19YF1410700).

语种：英文

外文关键词：Lignocellulose; Cellulosic ethanol; Wastewater recycling; Dry acid pretreatment; Salts accumulation

摘要：Huge wastewater generation is the major challenge of biorefinery technology for production of cellulosic ethanol. This study designed and verified a method for completely recycling of wastewater stream (the stillage liquid from the beer column) in cellulosic ethanol production by dry biorefining processing. When the stillage liquid was directly recycled to dry acid pretreatment operation, ethanol production gradually reduced after two recycles primarily because the inorganic compounds accumulated by around 139%. To ultimately solve this technical barrier, the stillage liquid was evaporated and condensed into distillated water, then recycled to the pretreatment for complete dry biorefining process. This strategy supported a stable cellulosic ethanol production, and the overall mass and heat balance confirmed that only 65% of the lignin residue consumption was used for wastewater evaporation with 35% surplus for electricity generation. This study provided a fully converged biorefining process with a closed-loop wastewater recycling.