King Abdullah University of Science and Technology, Water Desalination and Reuse Center, Biological and Environmental Science and Engineering Division, Thuwal 23955 6900, Saudi Arabia.
Flemish Institute for Technological Research (VITO), Separation and Conversion Technology, Boeretang 200, Mol 2400, Belgium; Centre for Advanced Process Technology for Urban Resource Recovery (CAPTURE), 9000 Ghent, Belgium.
Bioresour Technol. 2020 Apr;302:122863. doi: 10.1016/j.biortech.2020.122863. Epub 2020 Jan 23.
Recycling CO into organic products through microbial electrosynthesis (MES) is attractive from the perspective of circular bioeconomy. However, several challenges need to be addressed before scaling-up MES systems. In this review, recent advances in electrode materials, microbe-catalyzed CO reduction and MES energy consumption are discussed in detail. Anode materials are briefly reviewed first, with several strategies proposed to reduce the energy input for electron generation and enhance MES bioeconomy. This was followed by discussions on MES cathode materials and configurations for enhanced chemolithoautotroph growth and CO reduction. Various chemolithoautotrophs, effective for CO reduction and diverse bioproduct formation, on MES cathode were also discussed. Finally, research efforts on developing cost-effective process for bioproduct extraction from MES are presented. Future perspectives to improve product formation and reduce energy cost are discussed to realize the application of the MES as a chemical production platform in the context of building a circular economy.
通过微生物电化学合成（MES）将 CO 回收再利用成有机产品，从循环生物经济的角度来看具有吸引力。然而，在扩大 MES 系统之前，还需要解决几个挑战。在这篇综述中，详细讨论了电极材料、微生物催化 CO 还原和 MES 能耗方面的最新进展。首先简要回顾了阳极材料，并提出了几种策略来降低电子生成的能量输入并增强 MES 生物经济。接下来讨论了 MES 阴极材料和配置，以促进化自养生物的生长和 CO 还原。还讨论了在 MES 阴极上进行 CO 还原和多种生物产物形成的各种有效化自养生物。最后，介绍了从 MES 中提取生物产物的具有成本效益的工艺的研究进展。为了实现 MES 在循环经济背景下作为化学生产平台的应用，讨论了改善产物形成和降低能源成本的未来展望。
