کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
3035 | 148 | 2015 | 6 صفحه PDF | دانلود رایگان |
• A novel fixed-bed MFC for electricity generation and wastewater treatment.
• Carbon nanotubes were used simultaneously as the anode and microbial carrier.
• Overloading of MFC was first observed with increased organic loading.
• Overloading was confirmed by electrochemical and biochemical analysis.
A novel up-flow fixed-bed microbial fuel cell (FBMFC) using carbon nanotubes (CNTs) as the anode and microbial carrier was developed for continuous treatment of wastewater and electricity generation. A maximal power density of 590 mW m−3 was achieved with a maximal chemical oxygen demand (COD) removal rate of 90% at an organic loading rate (OLR) of 3.94 g COD l−1 d−1. An OLR of up to 10.27 g COD l−1 d−1 caused the overloading of FBMFC, accompanied with an unexpected decrease in voltage generation below 0.1 V and a sudden accumulation of volatile fatty acids (VFAs) up to 1.82 g l−1. The overloading also led to a rapid decline in COD removal rate (72%) and a morphology change of microbial consortia confirmed by scanning electron microscope (SEM). These results demonstrated the feasibility of Carbon nanotubes simultaneously as the anode and microbial carrier for up-flow fixed-bed microbial fuel cell. The overloading of MFC suggesting that further researches are still needed on improving the performance of FBMFC for energy production and wastewater treatment.
Journal: Biochemical Engineering Journal - Volume 94, 15 February 2015, Pages 39–44