Perazzoli Simone, Bastos Renan B, Santana Fabrício B, Soares Hugo M
Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, SC 88034-001, Brazil E-mail:
College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS 95500-000, Brazil.
Water Sci Technol. 2018 Aug;78(1-2):301-309. doi: 10.2166/wst.2018.295.
Biological fuel cells, namely microbial desalination cells (MDCs) are a promising alternative to traditional desalination technologies, as microorganisms can convert the energy stored in wastewater directly into electricity and utilize it in situ to drive desalination, producing a high-quality reuse water. However, there are several challenges to be overcome in order to scale up from laboratory research. This study was conducted in order to better understand the performance of MDCs inoculated with marine sediments during the treatment of brackish water (5.0 g L of NaCl) under three different configurations and cycles of desalination, envisaging the future treatment of saline wastewaters with conductivities lower than 10 mS cm. Results have shown that by increasing the desalination cycle three times, the efficiency of salt removal was improved by 3.4, 2.4 and 2.3 times for 1-MDC, 3-MDC, and 5-MDC, respectively. The same trend was observed for electrochemical data. Findings encourage further development of the MDC for sustainable brackish water and wastewater purification and future on-site utilization.
生物燃料电池，即微生物脱盐电池（MDCs），是传统脱盐技术的一种有前景的替代方案，因为微生物可以将废水中储存的能量直接转化为电能，并在原位利用它来驱动脱盐，从而产生高质量的回用水。然而，要从实验室研究扩大规模，仍有几个挑战需要克服。本研究旨在更好地了解在三种不同的脱盐配置和循环下，接种海洋沉积物的MDCs在处理微咸水（5.0 g/L NaCl）时的性能，设想未来处理电导率低于10 mS/cm的含盐废水。结果表明，通过将脱盐循环次数增加三倍，1-MDC、3-MDC和5-MDC的除盐效率分别提高了3.4倍、2.4倍和2.3倍。电化学数据也观察到了相同的趋势。这些发现鼓励进一步开发MDC，以实现可持续的微咸水和废水净化以及未来的现场利用。
