School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; State Key Laboratory of Urban Water Resources and Environments (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China.
Bioresour Technol. 2014 Apr;157:120-6. doi: 10.1016/j.biortech.2014.01.056. Epub 2014 Jan 24.
Microbial desalination cells (MDCs) with common liquid anodic substrate exhibit a slow startup and destructive pH drop, and abiotic cathodes have high cost and low sustainability. A biocathode MDC with dewatered sludge as fuel was developed for synergistic desalination, electricity generation and sludge stabilization. Experimental results indicated that the startup period was reduced to 3d, anodic pH was maintained between 6.6 and 7.6, and high stability was shown under long-term operation (300d). When initial NaCl concentrations were 5 and 10g/L, the desalinization rates during stable operation were 46.37±1.14% and 40.74±0.89%, respectively. The maximum power output of 3.178W/m(3) with open circuit voltage (OCV) of 1.118V was produced on 130d. After 300d, 25.71±0.15% of organic matter was removed. These results demonstrated that dewatered sludge was an appropriate anodic substrate to enhance MDC stability for desalination and electricity generation.
微生物脱盐电池 (MDC) 采用常见的液态阳极基板时，存在启动缓慢和 pH 值破坏性下降的问题，而非生物阴极则存在成本高和可持续性低的问题。本文开发了一种以脱水污泥为燃料的生物阴极 MDC，用于协同脱盐、发电和污泥稳定。实验结果表明，启动时间缩短至 3d，阳极 pH 值维持在 6.6 至 7.6 之间，在长期运行（300d）下表现出高稳定性。当初始 NaCl 浓度分别为 5 和 10g/L 时，稳定运行期间的脱盐率分别为 46.37±1.14%和 40.74±0.89%。在 130d 时，开路电压 (OCV) 为 1.118V 时，最大功率输出为 3.178W/m3。300d 后，去除了 25.71±0.15%的有机物。这些结果表明，脱水污泥是增强 MDC 稳定性以用于脱盐和发电的合适阳极基质。
