文献类型：期刊文献

英文题名：Simultaneous methanogenesis and acetogenesis from the greenhouse carbon dioxide by an enrichment culture supplemented with zero-valent iron

作者：Ma, Lei[1,2];Zhou, Lei[1,2];Ruan, Meng-Ya[1,2];Gu, Ji-Dong[3];Mu, Bo-Zhong[1,2,4]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Appl Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Univ Hong Kong, Sch Biol Sci, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China;[4]Shanghai Collaborat Innovat Ctr Biomfg Technol, Shanghai 200237, Peoples R China

年份：2019

卷号：132

起止页码：861

外文期刊名：RENEWABLE ENERGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000449892900067)】；

基金：This work was supported by the National Science Foundation of China (No. 41530318, 41403066), the Research Foundation of Shanghai (No. 15JC1401400), and the Fundamental Research Funds for the Central Universities of China (No. 222201717017, 222201414029).

语种：英文

外文关键词：CO2 bioconversion; Methanogenesis; Acetogenesis; Mineral carbonation; Zero valent iron (ZVI); Greenhouse gas

摘要：The microbial reduction of CO2 into value-added products is gaining considerable attention and can play a significant role in the field of environment and energy research. A novel strategy for biotransformation of CO2 was tested with zero valent iron (ZVI) and enrichment cultures for methane and acetate production under anaerobic conditions at room temperature. The favorable performance of CO2 conversion (81.67% of conversion rate) was achieved in ZVI-amended treatments by enhanced methanogenesis and acetogenesis simultaneously. The enrichment consortium of microorganisms containing Methanosarcina spp. and Clostridiaceae was responsible for methane and acetate production, and accounted for 25.89% and similar to 4.83% of CO2 conversion, respectively. Scanning electron microscopy (SEM) observation and mass balance analysis of hydrogen detected in the headspace indicated that direct electron transfer and utilization possibly occurred with these microbes, especially methanogens. Interestingly, X-ray Photoelectron Spectroscopy (XPS) confirmed carbonation mineral (FeCO3) as the major strategy of CO2 consumption under the experimental conditions. These observations collectively revealed that supplementation of ZVI can be a favorable electron donor to stimulate and accelerate the biotransformation of CO2 into methane and acetate by the enrichment culture of microorganisms, and the information presents available alternative biochemical pathways for energy recovery from greenhouse gas under anaerobic conditions. (C) 2018 Elsevier Ltd. All rights reserved.