Laboratory for Research on Advanced Processes for Water Treatment, Instituto de Ingeniería, Unidad Académica Juriquilla, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, Querétaro, Qro. 76230, Mexico.
Institute of Macromolecular Chemistry, AS CR, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic.
Bioelectrochemistry. 2020 Jun;133:107479. doi: 10.1016/j.bioelechem.2020.107479. Epub 2020 Feb 3.
In this work, two commercialized anion-exchange membranes (AEMs), AMI-7001 and AF49R27, were applied in microbial electrolysis cells (MECs) and compared with a novel AEM (PSEBS CM DBC, functionalized with 1,4-diazabicyclo[2.2.2]octane) to produce biohydrogen. The evaluation regarding the effect of using different AEMs was carried out using simple (acetate) and complex (mixture of acetate, butyrate and propionate to mimic dark fermentation effluent) substrates. The MECs equipped with various AEMs were assessed based on their electrochemical efficiencies, H generation capacities and the composition of anodic biofilm communities. pH imbalances, ionic losses and cathodic overpotentials were taken into consideration together with changes to substantial AEM properties (particularly ion-exchange capacity, ionic conductivity, area- and specific resistances) before and after AEMs were applied in the process to describe their potential impact on the behavior of MECs. It was concluded that the MECs which employed the PSEBS CM DBC membrane provided the highest H yield and lowest internal losses compared to the two other separators. Therefore, it has the potential to improve MECs.
在这项工作中，两种商业化的阴离子交换膜（AEMs），AMI-7001 和 AF49R27，被应用于微生物电解池（MECs）中，并与一种新型 AEM（PSEBS CM DBC，用 1,4-二氮杂二环[2.2.2]辛烷官能化）进行了比较，以生产生物氢气。使用不同的 AEM 对产氢效果的评估是使用简单（乙酸盐）和复杂（乙酸盐、丁酸盐和丙酸盐的混合物以模拟黑暗发酵流出物）的底物进行的。基于电化学效率、H 生成能力和阳极生物膜群落的组成，对各种 AEM 装备的 MEC 进行了评估。考虑了 pH 失衡、离子损失和阴极过电势，以及 AEM 在该过程中应用前后的实质性 AEM 特性（特别是离子交换容量、离子电导率、面积和比电阻）的变化，以描述它们对 MEC 行为的潜在影响。结果表明，与另外两种分离器相比，使用 PSEBS CM DBC 膜的 MEC 提供了最高的 H 产率和最低的内部损耗。因此，它有可能改善 MECs。
