Blázquez Enric, Gabriel David, Baeza Juan Antonio, Guisasola Albert, Ledezma Pablo, Freguia Stefano
GENOCOV Research Group, Department of Chemical, Biological and Environmental Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain.
Advanced Water Management Centre, The University of Queensland, Brisbane 4072, Australia.
Int J Environ Res Public Health. 2021 May 23;18(11):5571. doi: 10.3390/ijerph18115571.
Bio-electrochemical systems (BES) are a flexible biotechnological platform that can be employed to treat several types of wastewaters and recover valuable products concomitantly. Sulfate-rich wastewaters usually lack an electron donor; for this reason, implementing BES to treat the sulfate and the possibility of recovering the elemental sulfur (S) offers a solution to this kind of wastewater. This study proposes a novel BES configuration that combines bio-electrochemical sulfate reduction in a biocathode with a sulfide-air fuel cell (FC) to recover S. The proposed system achieved high elemental sulfur production rates (up to 386 mg S-S L d) with 65% of the sulfate removed recovered as S and a 12% lower energy consumption per kg of S produced (16.50 ± 0.19 kWh kg S-S) than a conventional electrochemical S recovery system.
生物电化学系统（BES）是一个灵活的生物技术平台，可用于处理多种类型的废水并同时回收有价值的产品。富含硫酸盐的废水通常缺乏电子供体；因此，采用BES处理硫酸盐以及回收元素硫（S）的可能性为这类废水提供了一种解决方案。本研究提出了一种新型的BES配置，该配置将生物阴极中的生物电化学硫酸盐还原与硫化物-空气燃料电池（FC）相结合以回收S。所提出的系统实现了较高的元素硫产率（高达386 mg S-S L d），65% 的去除硫酸盐以S的形式回收，并且每生产1 kg S的能耗比传统电化学S回收系统低12%（16.50 ± 0.19 kWh kg S-S）。
