中试规模微生物电解槽中过氧化氢的产生
Hydrogen peroxide production in a pilot-scale microbial electrolysis cell.
作者信息
Sim Junyoung, Reid Robertson, Hussain Abid, An Junyeong, Lee Hyung-Sool
机构信息
Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo N2L 3G1, Ontario, Canada.
School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
出版信息
Biotechnol Rep (Amst). 2018 Aug 1;19:e00276. doi: 10.1016/j.btre.2018.e00276. eCollection 2018 Sep.
A pilot-scale dual-chamber microbial electrolysis cell (MEC) equipped with a carbon gas-diffusion cathode was evaluated for HO production using acetate medium as the electron donor. To assess the effect of cathodic pH on HO yield, the MEC was tested with an anion exchange membrane (AEM) and a cation exchange membrane (CEM), respectively. The maximum current density reached 0.94-0.96 A/m in the MEC at applied voltage of 0.35-1.9 V, regardless of membranes. The highest HO conversion efficiency was only 7.2 ± 0.09% for the CEM-MEC. This low conversion would be due to further HO reduction to HO on the cathode or HO decomposition in bulk liquid. This low HO conversion indicates that large-scale MECs are not ideal for production of concentrated HO but could be useful for a sustainable in-situ oxidation process in wastewater treatment.
评估了一个配备碳气体扩散阴极的中试规模双室微生物电解池（MEC），以醋酸盐培养基作为电子供体来生产过氧化氢（HO）。为了评估阴极pH对HO产率的影响，分别使用阴离子交换膜（AEM）和阳离子交换膜（CEM）对MEC进行了测试。在0.35 - 1.9 V的外加电压下，无论使用何种膜，MEC中的最大电流密度均达到0.94 - 0.96 A/m²。对于CEM-MEC，最高的HO转化效率仅为7.2±0.09%。这种低转化率可能是由于阴极上HO进一步还原为HO或本体液体中HO分解所致。这种低HO转化率表明，大规模的MEC对于生产浓缩HO并不理想，但可用于废水处理中的可持续原位氧化过程。
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