纤维素乙醇
生物燃料
乙醇燃料
生物量(生态学)
制浆造纸工业
发酵
运动发酵单胞菌
化学
固碳
沼气
乙醇发酵
生物能源
二氧化碳
纤维素
废物管理
环境科学
食品科学
农学
生物
生物化学
工程类
有机化学
作者
Linpei Liu,Zheng Zhou,Guiping Gong,Bo Wu,Tatsaporn Todhanakasem,Jianting Li,Yong Zhuang,Mingxiong He
标识
DOI:10.1016/j.biortech.2024.130420
摘要
An integrated process for the co-production of cellulosic ethanol and microalgal biomass by fixing CO2 generated from bioethanol fermentation is proposed. Specifically, over one-fifth of the fermentative carbon was converted into high-purity CO2 during ethanol production. The optimal concentration of 4 % CO2 was identified for the growth and metabolism of Chlorella sp. BWY-1. A multiple short-term intermittent CO2 supply system was established to efficiently fix and recycle the waste CO2. Using this system, economical co-production of cellulosic ethanol by Zymomonas mobilis and microalgal biomass in biogas slurry wastewater was achieved, resulting in the production of ethanol at a rate of 0.4 g/L/h and a fixed fermentation CO2 of 3.1 g/L/d. Moreover, the amounts of algal biomass and chlorophyll a increased by over 50 % and two-fold, respectively. Through techno-economic analysis, the integrated process demonstrated its cost-effectiveness for cellulosic ethanol production. This study presents an innovative approach to a low-carbon circular bioeconomy.
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