| World-wide depletion of energy reservers and environmental contamination are inspiring the search for renewable and environment-friendly technologies to recover useful energy and materials from organic wastes. This has been particularly emphasised as a significant approach so as to make the wastewater treatment more sustainable and economical in the field of environmental engineering.This study systematically investigated the feature and corresponding mechanisms of two-chambered MFC, including the basic characteristics of power generation, the effects of MFC power generation performance and optimization of wastewater treatment effects, differences between MFC and A/O. Some findings have been made as follows:Using anaerobic sludge can successfully start the two reactors, but compared with the flapper MFC, non-flapper MFC can start within in a short time (150 h). When external resistance Rex = 500?, the two MFC's peak voltage were 0.21V and 0.42V. MFC's internal resistance were 79.4? and 178.6Ω, maximum power density was 8.4 W/m3, 0.83W/m3, coulomb efficiency was 9.4% and 6.3%. Shows that due to flapper MFC lengthened the distance between the anode and cathode electrodes, battery internal resistance increases, while preventing the spread of the oxygen, but it also increases the proportion of organic matter into methane, leading to baffle reactor low coulombic efficiency. Two MFC's COD removal rates were 93.2% and 90.7%, showed that the two MFC can achieve power generation and synchronization of organic matter degradation.MFC power generation performance and optimization of wastewater treatment test. The results show that, MFC power density with the organic substrate concentration in a saturation effect. In a certain range of the average power density of batteries with higher concentrations of organic substrate and increase in COD was 120mg/L when the power density increased to reach plateau. By reducing the hydraulic retention time, thereby enhancing the unit of time the absolute supply of organic matter can increase the output power of the battery, but when the hydraulic retention time is less than 12 hours, water quality can not be complianced. Cathode to increase the amount of dissolved oxygen increased power output and the battery is beneficial organic place, but when the aeration reached 300mL/min, the battery voltage is 0.43V, continued to increase aeration, the battery voltage is then began to decline. Buffering capacity of the wastewater of the power output has an important influence, but no significant effect on contaminant removal.MFC with traditional A/O process treating domestic wastewater continuously experiment shows that MFC in HRT 12h, 30 min interval aeration (300mL/min) conditions, the continuous flow treatment of domestic sewage can receive maximum voltage of 0.42V (Rex = 500Ω), the maximum power density of 7.6 W/m3, resistance to 71Ωturbidity. Maximum COD removal rate reached 92.4% and 94.6% and ammonia removal rate were 82.1% and 67.7%. Non-flapper MFC actually can be regarded as A/O process reactor in structure and function, and is more suitable for application of wastewater treatment and has important value in applications. |
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