Department of Environmental Engineering, University of Baghdad, Baghdad, Iraq.
Department of Environmental Engineering, University of Baghdad, Baghdad, Iraq.
Sci Total Environ. 2023 Jun 1;875:162630. doi: 10.1016/j.scitotenv.2023.162630. Epub 2023 Mar 6.
A sustainable approach for simultaneous desalination of actual seawater for potable water supply, and bioelectrochemical treatment of sewage associated with power generation was evaluated in a tubular photosynthesis desalination microbial fuel cell (PDMC) continually operated for 180 days. Anion exchange membrane (AEM) was used to separate the bioanode and desalination compartments, whereby, and cation exchange membrane (CEM) was used to separate the desalination and biocathode compartments. Mixed bacterial species and mixed microalgae were utilized for inoculation of the bioanode and biocathode, respectively. The results revealed that maximum and average desalination efficiencies of saline seawater fed to the desalination compartment were 80 ± 1 % and 72 ± 1.2 %, respectively. Maximum and average removal efficiencies of the sewage organic content in the anodic compartment were up to 99.3 ± 0.5 % and 91.0 ± 0.8 %, respectively associated with maximum power output of 430.7 ± 0.7 mW/m. In spite of the heavy growth of the mixed bacterial species and microalgae as well, no fouling of AEM and CEM was observed during the entire period of operation. Kinetic study demonstrated that Blackman model described well the bacterial growth. Dense and healthy growth of biofilm and the microalgae in the anodic and cathodic compartments, respectively were clearly observed during the operation period. The promising outcomes of this investigation demonstrated that the suggested approach is a potential sustainable option for simultaneous desalination of saline seawater for potable water supply, biotreatment of sewage, and power generation.
在一个连续运行 180 天的管状光合淡化微生物燃料电池（PDMC）中，评估了一种同时淡化实际海水以供应饮用水、以及生物电化学处理与发电相关的污水的可持续方法。阴离子交换膜（AEM）用于分离生物阳极和淡化隔室，阳离子交换膜（CEM）用于分离淡化和生物阴极隔室。混合细菌物种和混合微藻分别用于生物阳极和生物阴极的接种。结果表明，向淡化隔室供应的盐水海水的最大和平均淡化效率分别为 80±1%和 72±1.2%。阳极隔室中污水有机含量的最大和平均去除效率高达 99.3±0.5%和 91.0±0.8%，同时最大输出功率为 430.7±0.7mW/m。尽管混合细菌物种和微藻大量生长，但在整个运行期间未观察到 AEM 和 CEM 的结垢。动力学研究表明，Blackman 模型很好地描述了细菌的生长。在运行期间，生物阳极和阴极隔室中分别可以清楚地观察到生物膜和微藻的密集和健康生长。这项研究的有前景的结果表明，所提出的方法是一种同时淡化海水以供应饮用水、生物处理污水和发电的潜在可持续选择。
