摘要
构建了双室微生物燃料电池(MFC),并应用于污水BOD的检测。优化了MFC型BOD传感器的检测条件,分析了传感器进行污水BOD检测的特征。结果表明,以A2/O污水处理工艺中厌氧段污泥进行接种,双室MFC型BOD传感器2周内完成启动,所产电流达到稳定。传感器的最佳检测条件为外接电阻500Ω,添加缓冲溶液并维持待测水样pH为7.0,添加35 mg/L的L-半胱氨酸作为吸氧剂维持阳极室厌氧环境,阴极室富氧水流量为20 mL/min。利用MFC产生的电流峰值准确检测污水水样BOD浓度,传感器检测范围为10~50 mg/L,检测时间小于3 h;利用MFC产生的电荷量准确检测污水水样BOD浓度,检测范围为10~100 mg/L,检测时间小于10 h。利用MFC电流峰值和电荷量检测污水水样BOD浓度,偏差均小于15%,传感器运行稳定,寿命较长。
In this study,a double-chamber microbial fuel cell(MFC) was constructed and was used for BOD detection. The detection conditions were optimized and the performances were analyzed. The inoculated sludge was taken from the anaerobic phase of an A2/O wastewater treatment process. The results showed that the MFC started up within two weeks and the current of MFC became stable. The optimal conditions for BOD detection were an external resistance of 500 Ω,a wastewater pH of 7. 0 with addition of phosphate buffer,anaerobic condition in the anode chamber with,addition of L-cysteine(35 mg/L) as oxygen absorbent,and 20 mL/min of oxygen-enriched water in the cathode chamber. BOD could be measured based on the maximum current of the MFC,the detection range was 10 ~ 50 mg/L and the measuring time was 3 h. BOD could also be measured based on the charge of the MFC,the detection range was 10 ~ 100 mg/L and the measuring time was 10 h. For both methods,the detection deviation was below 15%,the MFC-based BOD sensor ran stably and the life was long.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第6期2626-2632,共7页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51178047)
