微生物燃料电池
硫酸盐还原菌
废水
化学
硫酸盐
生物修复
阳极
硫化物
环境化学
脱硫弧菌
有机质
核化学
细菌
环境工程
有机化学
环境科学
电极
生物
物理化学
遗传学
作者
Waheed Miran,Jiseon Jang,Mohsin Nawaz,Asif Shahzad,Sang Eun Jeong,Che Ok Jeon,Dong Hoon Lee
出处
期刊:Chemosphere
[Elsevier]
日期:2017-12-01
卷期号:189: 134-142
被引量:90
标识
DOI:10.1016/j.chemosphere.2017.09.048
摘要
Microbial fuel cells (MFCs) have been widely investigated for organic-based waste/substrate conversion to electricity. However, toxic compounds such as heavy metals are ubiquitous in organic waste and wastewater. In this work, a sulfate reducing bacteria (SRB)-enriched anode is used to study the impact of Cu2+ on MFC performance. This study demonstrates that MFC performance is slightly enhanced at concentrations of up to 20 mg/L of Cu2+, owing to the stimulating effect of metals on biological reactions. Cu2+ removal involves the precipitation of metalloids out of the solution, as metal sulfide, after they react with the sulfide produced by SRB. Simultaneous power generation of 224.1 mW/m2 at lactate COD/SO42- mass ratio of 2.0 and Cu2+ of 20 mg/L, and high Cu2+ removal efficiency, at >98%, are demonstrated in the anodic chamber of a dual-chamber MFC. Consistent MFC performance at 20 mg/L of Cu2+ for ten successive cycles shows the excellent reproducibility of this system. In addition, total organic content and sulfate removal efficiencies greater than 85% and 70%, respectively, are achieved up to 20 mg/L of Cu2+ in 48 h batches. However, higher metal concentration and very low pH at <4.0 inhibit the SRB MFC system. Microbial community analysis reveals that Desulfovibrio is the most abundant SRB in anode biofilm at the genus level, at 38.1%. The experimental results demonstrate that biological treatment of low-concentration metal-containing wastewater with SRB in MFCs can be an attractive technique for the bioremediation of this type of medium with simultaneous energy generation.
科研通智能强力驱动
Strongly Powered by AbleSci AI