摘要
微生物燃料电池(MFC)在产生电流的同时还能处理糖蜜废水和电镀废水,并能从电镀废水中回收金属单质。本实验确定了电镀废水阴极液对双室微生物燃料电池产电性能的影响,阴极液分别采用银离子、铜离子和锌离子溶液作为MFC的阴极液,其初始浓度均配成1000mg/L。结果表明,锌离子作为阴极时MFC的产能效果最不理想,功率密度仅为1.9×10-6mW/m2。阴极为铜离子溶液时,可以获得相对大一些的功率密度(13.9mW/m2)。产能效果最好的是银离子阴极MFC,在电流密度为82.7mA/m2其获得最大功率密度为23.1mW/m2,COD去除率为71%,且其重金属去除率最大(72%),远远高于锌离子和铜离子。研究表明,重金属离子可以作为微生物燃料电池的阴极电子受体,MFC可以将有机废水中的化学能直接转化为电能,同时将重金属还原,具有显著的环境效益和经济效益。
Microbial fuel cell（MFC）can not only generate current,but also treat molasses waste water and electroplating waste water,and recover metals from electroplating waste water.This experiment identified the influence of the cathode solution of the electroplating waste water to the MFC＇s perfermance on electricity production. Taking silver ion containing,copper ion containing and zinc ion containing solutions separately as MFC＇s cathod solution,and their initial concentrations are all in 1000 mg/L.The results show that,the zinc ion＇s presents poorest result,its power density is only 1.9×10-6 mW/m2,the copper one is the medium,its power density is 13.9 mW/m2, and silver one is the best,its power density reaches 23.1 mW/m2,when current density is 82.7 mA/m2 and its COD removal rate is 71%,heavy metal removal rate reaches 72%,much higher than that of the copper ion＇s and zinc ion＇s.Studies have shown that heavy metal ions could be used as the MFC＇s cathodic ions receptor.MFC can directly transfer chemical energy in organic waste water into electricity,and make the heavy metals reduced,so MFC has significant environmental and economical benefits.
出处
《上海化工》
CAS
2011年第3期10-13,共4页
Shanghai Chemical Industry
基金
上海市重点科技攻关项目(071605122)
国家高技术研究发展计划863项目(2006AA05Z109)
关键词
微生物燃料电池
糖蜜废水
电镀废水
阴极电子受体
功率密度
COD去除率
Microbial fuel cell
Molasses waste water
Electroplating waste water
Cathode electron acceptor
Power density
COD removal
