以养殖废水为底料的微生物燃料电池产电性能与水质净化效果

以养殖场沼泥为接种物,构建了乙二胺、三氯化铁改性碳毡阳极的单室无膜微生物燃料电池,探讨了2种阳极改性电池的产电规律,考察了其去除养殖废水中COD、氨氮的效果以及臭味的表观性状变化。结果表明,以葡萄糖为底物时,乙二胺、三氯化铁改性阳极微生物燃料电池在启动20 d和22 d后分别达到稳定,输出电压分别为0.514 V和0.527V(外阻为500Ω),对应输出功率密度分别为332 mW/m2和349 mW/m2。逐渐增大废水投加比例至原水时,2个电池的最大功率密度分别为208 mW/m2和158 mW/m2,COD去除率分别为85%和78%,氨氮去除率分别为52%和45%。此外,养殖废水的臭味去除效果明显。因此,构建的2种改性阳极微生物燃料电池可以利用养殖废水产电,同时使水质得到一定程度的净化。

Electricity generation and treatment of swine wastewater using microbial fuel cells

Single-chamber membrane-less microbial fuel cells(MFCs) were constructed by using swine manure marsh-gas tank sediment as inoculants and equipped with carbon fiber felts modified with ethylenediamine(EDA) and ferric chloride(FeCl3) as anodes,to investigate electricity-generating performance of the two different MFCs and the removals of COD,ammonia and odor.The results showed that when glucose was used as anode fed,the MFCs equipped with EDA and FeCl3 modified anodes reached their stable voltages of 0.514 V and 0.527 V(external resistance 500 Ω) after running MFCs 20 d and 22 d,and the corresponding power output densities were 332 mW/m2 and 349 mW/m2,respectively.When using swine wastewater as substrate,the maximum power densities of the MFCs with EDA and FeCl3 modified anodes were 208 mW/m2 and 158 mW/m2,respectively.The average COD and ammonia removal efficiencies were 52%,85% and 45%,78%,respectively.In addition,it is possible to accelerate the rate of odor removal by using MFCs.Therefore,the two MFCs equipped with the different modified anodes can use swine wastewater to generate electricity,and its water quality can be improved as well.