Architectures of microbial electrosynthesis cell for acetate extraction: A mini review

Large-scale application of microbial electrosynthesis (MES) demands the extraction of a single product from other by-products. Acetate is one of the most valuable products produced in MES. Therefore, many recent studies investigated several aspects of optimizing acetate production in MES. However, none of the previous studies provided a summary of acetate extraction in MES. This review provides an overview of acetate extraction methods in MES, introducing future improved designs that combine efficient production and extraction processes. Sorption, membrane electrolysis, and electrodialysis were found to be highly efficient technologies for acetate extraction in MES. However, the energy input for these techniques was high. Therefore, an integrated architecture of MES reactors for acetate extraction is crucial for system performance and economic viability. Innovations in in-situ extraction show promise in addressing current limitations. However, further research on adsorbent and membrane fouling, and energy optimization, is needed to make MES sustainable technology.