Department of Chemical and Food Engineering, Federal University of Santa Catarina, 88034-001 Florianópolis, SC, Brazil E-mail:
Department of Mechanical Engineering, Federal University of Santa Catarina, 88034-001 Florianópolis, SC, Brazil.
Water Sci Technol. 2020 Feb;81(3):550-563. doi: 10.2166/wst.2020.134.
Bioelectrochemical systems are emerging as a promising and friendly alternative to convert the energy stored in wastewater directly into electricity by microorganisms and utilize it in situ to drive desalination. To better understand such processes, we propose the development of an anoxic biocathode microbial desalination Cell for the conversion of carbon- and nitrogen-rich wastewaters into bioenergy and to perform salt removal. Our results demonstrate a power output of 0.425 W m with desalination, organic matter removal and nitrate conversion efficiencies of 43.69, 99.85 and 92.11% respectively. Microbiological analysis revealed Proteobacteria as the dominant phylum in the anode (88.45%) and biocathode (97.13%). While a relatively higher bacterial abundance was developed in the anode chamber, the biocathode showed a greater variety of microorganisms, with a predominance of Paracoccus (73.2%), which are related to the denitrification process. These findings are promising and provide new opportunities for the development and application of this technology in the field of wastewater treatment to produce cleaner water and conserve natural resources.
生物电化学系统作为一种有前途和友好的替代方法，正在兴起，可以通过微生物将储存在废水中的能量直接转化为电能，并就地利用这些能量来驱动脱盐。为了更好地理解这些过程，我们提出开发一种缺氧生物阴极微生物脱盐电池，用于将富碳和富氮废水转化为生物能源，并进行盐分去除。我们的结果表明，在脱盐、有机物去除和硝酸盐转化方面，分别获得了 0.425 W m 的功率输出、43.69%、99.85%和 92.11%的效率。微生物分析显示，在阳极（88.45%）和生物阴极（97.13%）中，变形菌门是主要的门。虽然在阳极室中培养出了相对较高的细菌丰度，但生物阴极显示出了更多样化的微生物，其中副球菌（73.2%）占主导地位，与反硝化过程有关。这些发现很有前景，为这项技术在废水处理领域的开发和应用提供了新的机会，可以生产更清洁的水并保护自然资源。
