Immobilization of trophic anaerobic acetogen for semi-continuous syngas fermentation  

作　　者：Lijuan Zhang Peng Hu Jiang Pan Huilei Yu Jianhe Xu 

机构地区：[1]State Key Laboratory of Bioreactor Engineering,Shanghai Collaborative Innovation Centre for Biomanufacturing,East China University of Science and Technology,Shanghai 200237,China [2]Shanghai GTL Biotech Co.Ltd.,Shanghai 200438,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第1期311-316,共6页中国化学工程学报（英文版）

基　　金：supported by the National Key Research and Development Program of China (2019YFA0905000);the National Natural Science Foundation of China (21536004, 21922804, 21776085, and 21871085);the Fundamental Research Funds for the Central Universities (22221818014)。

摘　　要：The massive consumption of fossil energy force s people to find new source s of energy.Syngas fermentation has become a hot research field as its high potential in renewable energy production and sustainable development.In this study,trophic anaerobic acetogen Morella thermoacetica was successfully immobilized by calcium alginate embedding method.The ability of the immobilized cells on production of acetic acid through syngas fermentation was compared in both airlift and bubble column bioreactors.The bubble column bioreactor was selected as the better type of bioreactor.The production of acetic acid reached 32.3 g·L^(-1) in bubble column bioreactor with a space-time yield of 2.13 g·L^(-1)·d^(-1).The immobilized acetogen could be efficiently reused without significant lag period,even if exposed to air for a short time.A semi-continuous syngas fermentation was performed using immobilized cells,with an average space-time acetic acid yield of 3.20 g·L^(-1)·d^(-1).After 30 days of fermentation,no significant decrea se of the acetic acid production rate was observed.

关 键 词：ANAEROBIC SYNGAS Acetic acid IMMOBILIZATION Bioreactors Semi-continuous fermentation 

分 类 号：TQ921[轻工技术与工程—发酵工程]