In situ acetate separation in microbial electrosynthesis from CO2 using ion-exchange resin
In situ acetate separation in microbial electrosynthesis from CO2 using ion-exchange resin
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DOI：
10.1016/j.electacta.2017.03.209
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发表时间：
2017-05-20
影响因子：
6.6
通讯作者：
Strik, David P. B. T. B.
中科院分区：
文献类型：
--
作者：
Bajracharya, Suman;van den Burg, Bart;Strik, David P. B. T. B.
在微生物电合成（MES）中，已经使用在电极化阴极处产生的还原当量实现了二氧化碳（CO2）到多碳有机化合物（特别是乙酸盐）的生物电化学还原。基于CO2还原的MES在阴极产生7-10 g L（1）乙酸盐，同时使用富含同型产乙酸活性的混合培养物以分批模式操作CO2进料反应器。从阴极电解液中提取乙酸盐的整合是令人感兴趣的，首先是为了回收产物，其次是为了减少由于脂肪酸积累而可能的产物抑制。我们研究了在MES中从CO2生产乙酸盐，并使用市售的阴离子交换树脂（Amberlite（TM）FPA 53）从发酵液中分批除去乙酸盐。从阴极电解液肉汤中观察到10-20 mg g（1）树脂的醋酸盐吸附。在通过吸附去除乙酸盐之后，从CO2继续以0.5 g L（1）d（1）生产乙酸盐。总体而言，通过MES与阴离子交换树脂的整合，用于生产和分离乙酸盐与CO2的MES系统在技术上是可行的。(C)2017爱思唯尔有限公司版权所有
Bioelectrochemical reduction of carbon dioxide (CO2) to multi-carbon organic compounds particularly acetate has been achieved in microbial electrosynthesis (MES) using the reducing equivalents produced at the electrically polarized cathode. MES based on CO2 reduction produced 7-10 g L (1) acetate at the cathode while operating the CO2 fed reactor in batch mode using the homoacetogenic activity enriched mixed culture. An integration of acetate extraction from the catholyte is interesting, firstly to recover the product and secondly to reduce the probable product inhibition due to the accumulation of fatty acids. We investigated acetate production from CO2 in MES in combination with a batch-wise removal of acetate from the broth using a commercially available anion-exchange resin (Amberlite (TM) FPA53). Acetate sorptions of 10-20 mg g (1) resin were observed from the catholyte broth. The production of acetate from CO2 continued at 0.5 g L (1) d (1) after the acetate removal by sorption. Overall, an MES system for the production and separation of acetate from CO2 was technically feasible through the integration of MES with an anion exchange resin. (C) 2017 Elsevier Ltd. All rights reserved.