摘要
以输出功率和内阻为评价指标,考察了直接微生物燃料电池在间歇运行过程中pH值、底物浓度、电极间距和添加电解质对产电性能的影响.结果表明,pH值对输出功率影响较大,最佳值为7.5;输出功率随底物浓度的增大而增大.减小电极间距能有效降低电池内阻,提高输出功率,当电极间距为2cm时,最大功率密度为700mW/m2,内阻为80?,库仑效率为7.7%.磷酸盐缓冲溶液作为电解质对功率提高的效果优于NaCl,其添加量为100mmol/L时,最大功率密度达922mW/m2,内阻为70?,库仑效率为11.5%.
The output power and resistance were evaluated to investigate the effects ofpH, substrate concentration, electrode spacing and electrolyte addition on the electricity generation of direct microbial fuel cell. The results showed that output power was much affected by pH. The optimal pH value was 7.5. The output power increased with the substrate concentration. It could be improved with the decrease of resistance as the electrode spacing decreased. When electrode spacing was decreased to 2 cm, the maximum power density was 700 mW/m^2, the resistance 80 Ω, and the coulomb efficiency 7.7%. PBS as the electrolyte was much better than NaCl on power improvement. When PBS was 100 mmol/L, the maximum power density was 922 mW/m^2, the resistance 70 Ω, and the coulomb efficiency 11.5%.
出处
《过程工程学报》
CAS
CSCD
北大核心
2009年第3期526-530,共5页
The Chinese Journal of Process Engineering
基金
国家高技术研究发展计划(863)基金资助项目(编号:2006AA02Z211)
国家重点基础研究发展规划(973)基金资助项目(编号:2009CB724700)
江苏省省级污染防治专项基金资助项目(编号:2006-1-W-19)
江苏省自然科学基金资助项目(编号:BK2006181
BK2007188)
江苏省环保科技基金资助项目(编号:2007020)
