Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
Bioresour Technol. 2018 May;255:76-82. doi: 10.1016/j.biortech.2018.01.097. Epub 2018 Feb 2.
In this work, a microbial desalination cell (MDC) was employed to desalinate the FO treated leachate for reduction of both salinity and chemical oxygen demand (COD). The FO recovered 51.5% water from a raw leachate and the recovery increased to 83.5% from the concentrated leachate after desalination in the MDC fed with either acetate or another leachate as an electron source and at a different hydraulic retention time (HRT). Easily-degraded substrate like acetate and a long HRT resulted in a low conductivity desalinated effluent. Ammonia was also recovered in the MDC cathode with a recovery efficiency varying from 11 to 64%, affected by current generation and HRT. Significant COD reduction, as high as 65.4%, was observed in the desalination chamber and attributed to the decrease of both organic and inorganic compounds via diffusion and electricity-driven movement.
在这项工作中，采用微生物脱盐电池（MDC）对 FO 处理后的渗滤液进行脱盐，以降低盐度和化学需氧量（COD）。FO 从原渗滤液中回收了 51.5%的水，而在 MDC 中进行脱盐后，通过以乙酸盐或另一种渗滤液作为电子源并在不同水力停留时间（HRT）下进料，浓缩渗滤液的回收率增加到 83.5%。易于降解的基质如乙酸盐和较长的 HRT 导致低电导率的脱盐出水。在 MDC 阴极也回收了氨，其回收率从 11%到 64%不等，这受到电流产生和 HRT 的影响。在脱盐室中观察到 COD 的显著降低，高达 65.4%，这归因于通过扩散和电力驱动的运动减少了有机和无机化合物。
