摘要
针对微生物燃料电池产电电流密度低等问题,提出重铬酸钾(K2Cr2O7)和氯酸钾(KClO3)改性阳极提高微生物燃料电池性能的方法。以湖底污泥为阳极底物,糖蜜废水为阳极液,高锰酸钾(KMnO4)和氯化钠(NaCl)的混合液为阴极液,构建微生物燃料电池实验系统;以 K2Cr2O7或 KClO3为电解液,通过电解处理对阳极进行改性。结果表明,采用质量分数为 6%的 K2Cr2O7溶液对阳极进行改性时,微生物燃料电池系统的产电性能和净水效果达到比较好的状态,其稳态输出电压约为 8.5 mV,稳态电流密度为 7.9 mA m 2,对糖蜜废水的化学需氧量(COD)去除率约为 35.2%。K2Cr2O7或 KClO3 改性碳布作为阳极的微生物燃料电池的发电性能和水处理效果均有明显改善。
A method for the improvement of microbial fuel cell performance was proposed by modifying anodes with potassium dichromate (K2Cr2O7) and potassium chlorate (KClO3) in order to enhance current density. A microbial fuel cell experimental system was constructed using sludge gathered from lake bottom as the anode substrate, molasses wastewater as anolyte and the mixture of potassium permanganate (KMnO4) and sodium chloride (NaCl) as catholyte. The anode was modified with electrolytic treatment using K2Cr2O7 or KClO3 as electrolytes. The results show that the optimum power generation performance and purification effects of the microbial fuel cell system can be obtained when 6% K2Cr2O7 was used. The steady-state output voltage was about 8.5 mV, the steady current density was 7.9 mA m 2 and the removal rate of chemical oxygen demand (COD) for treating the molasses wastewater was about 35.2%. The power generation performance and wastewater treatment effects are significantly improved when using the MFC with K2Cr2O7 and KClO3 modified carbon cloth anode.
作者
樊立萍
鲍万飞
FAN Li-ping;BAO Wan-fei(College of Information Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China;College of Environment and Safety Engineering, Shenyang University of Chemical Technology,Shenyang 110142, China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2019年第3期758-764,共7页
Journal of Chemical Engineering of Chinese Universities
基金
中国-马其顿政府间科技合作项目(国科外[2017]25:5-5)
关键词
微生物燃料电池
糖蜜废水
阳极改性
废水处理
microbial fuel cell
molasses wastewater
anode modification
wastewater treatment
