de Fouchécour Florence, Larzillière Valentin, Bouchez Théodore, Moscoviz Roman
Université Paris-Saclay, INRAE, PROSE, 92160, Antony, France.
Université Paris-Saclay, INRAE, PROSE, 92160, Antony, France; SUEZ, Centre International de Recherche Sur l'Eau et l'Environnement (CIRSEE), 78230, Le Pecq, France.
Water Res. 2022 May 1;214:118142. doi: 10.1016/j.watres.2022.118142. Epub 2022 Feb 1.
Wastewater treatment is generally performed using energy-intensive processes, such as activated sludge. Improving energy efficiency has become one of the main challenges for next-generation wastewater treatment plants. Bioelectrochemical systems (BES) have been attracting attention because they take advantage of the chemical energy contained in wastewater while enabling the valorization of effluents: either with electrical energy (microbial fuel cells) or with useful chemicals (microbial electrolysis cells). Bioelectrochemical wastewater treatment has been under investigation since the early 2000s and is now the subject of an abundant literature, which is most frequently focused on anodic COD removal. Comparing results obtained in different studies is particularly difficult with BES, because many different parameters (effluent characteristics, inoculation, design, and operation) may interact and because using real effluents results in high variability. To address this issue, data were retrieved from 1,073 articles that were selected objectively and with transparency. This systematic review evaluates the potential of anodic wastewater treatment, based on 4,579 experimental observations. Overall, BES has already shown satisfactory treatment capacity, with a median chemical oxygen demand removal of 72%. However, the median coulombic efficiency was only 18%, increasing this parameter offers the greatest opportunity for BES improvement.
废水处理通常采用能耗高的工艺，如活性污泥法。提高能源效率已成为下一代废水处理厂面临的主要挑战之一。生物电化学系统（BES）因其能利用废水中所含的化学能，同时实现废水的增值利用（通过电能，即微生物燃料电池；或通过有用化学品，即微生物电解池）而备受关注。自21世纪初以来，生物电化学废水处理技术一直在研究中，如今已成为大量文献的主题，这些文献大多聚焦于阳极化学需氧量的去除。对于生物电化学系统而言，比较不同研究中获得的结果尤为困难，因为许多不同参数（废水特性、接种、设计和运行）可能相互作用，而且使用实际废水会导致高度变异性。为解决这一问题，我们从1073篇文章中客观且透明地检索了数据。本系统综述基于4579次实验观察评估了阳极废水处理的潜力。总体而言，生物电化学系统已显示出令人满意的处理能力，化学需氧量去除率中位数为72%。然而，库仑效率中位数仅为18%，提高这一参数为生物电化学系统的改进提供了最大机会。
