Microbial Fuel Cell Inoculated with Ochrobactrum Tritici KCC210 for Chromium (VI) Measurement in Electroplating Wastewater

2017 International Conference on Advanced Environmental Engineering

生态环境科学

Kuo, Jongtar^1 ; Kuo, Juiling^1 ; Cheng, Chiuyu^1 ; Chung, Yingchien^1

Department of Biological Science and Technology, China University of Science and Technology, Taipei, Taiwan^1

关键词: Anaerobic conditions;    Bio-sensor systems;    Detection device;    Electroplating wastewater;    Linear relationships;    Maximum power density;    Ochrobactrum tritici;    Stable performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/111/1/012015/pdf
DOI  :  10.1088/1755-1315/111/1/012015

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Many methods/techniques have been developed for Cr(VI) measurement, but they are often conducted offsite or/and cannot provide real-time for Cr(VI) monitoring. A microbial fuel cell (MFC) is a self-sustaining device and has great potential as a biosensor for in situ Cr(VI) measurement, especially for wastewater generated from different electroplating units. In this study, Ochrobactrum tritici KCC210, a facultatively anaerobic, Cr(VI)-reducing, and exoelectrogenic bacterium, was isolated and inoculated into the MFC to evaluate its feasibility as a Cr(VI) biosensor. The results indicated that O. tritici KCC210 exhibited high adaptability to pH, and temperature under anaerobic conditions. The maximum power density of the MFC biosensor was 17.5±0.9 mW/m2at 2,000 Ω. A good linear relationship was observed between the Cr(VI) concentration (10-80 mg/L) and voltage output. The stable performance of the MFC biosensor indicated its potential as a reliable biosensor system. Moreover, the developed MFC biosensor is a simple device that can accurately measure Cr(VI) concentrations in the actual electroplating wastewater generated from different electroplating units within 15 min with low deviations (-1.8% to 7.8%) in comparison with the values determined using standard method. Thus, the MFC biosensor can measure Cr(VI) concentrations in situ in the effluents and has potential as an early warning detection device.