The Industry Wastewater Using Anaerobic Fluidized Bed Microbial Fuel Cell

In recent years, the microbial fuel cell technology has made a breakthrough and became a new concept of wastewater treatment. In this study, the liquid-solid anaerobic fluidized bed (AFB) process was combined with the microbial fuel cell technology. The feasibility and impact factors of fuel cells were investigated. Industry wastewater was treated efficiently and electricity is outputted by making use of microbial.Inside the liquid-solid anaerobic fluidized bed single-chamber membrane air-cathode microbial fuel cell (0.032 m in diameter,0.6 m in diameter). Industry wastewater was the liquid and solid phase, under the conditions of the inoculation of anaerobic sludge, the impact of flow state on the performance of electricity generation is studied. The results show that, the maximum output voltage of triple series is 623.5 mV, which is equal to the total of three single batteries. And the maximum power density is 0.340mW/m2. The system’s internal resistance is 21667Ω. The COD of beer wastewater was decreased from 2025 mg/L to 107.4 mg/L at 35℃ after running 10 days, and the COD removal ratio up to 94.69%. From the HPLC spectra of the influent and effluent of MFCs fed with beer wastewater analysis shows that organic substances such as xylose, acetic acid in beer wastewater can be fully degraded.A single chambered packing type microbial fuel cell (MFC) with coal chemical industry wastewater as its fuel was constructed to study the influence of starting conditions which inoculum, external resistance, the concentration of coal chemical industry wastewater, pH strength and temperature on electricity generation of MFC. After being treated by MFC, COD removal rate of refinery wastewater was (92.5±1.5)%, Microorganisms existed in initial wastewater could start up MFC, but the start-up period was long, and inoculums were needed to start up MFC quickly. The influence on external resistance used at start-up period on power density was obvious, while its influence on internal resistance of MFC was relatively little, when the concentration of coal chemical industry wastewater is 2000 mg/L, the power density of MFC was 1.53 mW/m2. When pH value is 7, The maximum output voltage is 307.6 mV.