The Optimization Of Microbial Fuel Cell Electrode Materials And The Experimental Research On The Treatment Of Domestic Sewage

With rapid development of global economy in recent years, the energy shortage andenvironmental pollution problem have become an increasingly important factor to limit socialdevelopment. Microbial fuel cell is a brand new way of making waste recycling, which hasbeen favored continuously by researchers. It has been considered to make a difference inresource shortages in the future. At present, in terms of the microbial fuel cell, there are someproblems. For example, configuration is too small to magnify geometrical and ion-exchangemembrane is expensive and electricity production is low and so on. Dual-chamber microbialfuel cells was considered as the object of the research by using cheap proton exchange in thispaper, in order to improve th electricity production performance of MFC by modified electrodeand studied treatment ofdomesticwasterwater.With Pb-MnO2catalyzed MFC cathode, the power density has improved45.99%, theresistance was reduced42.8and the maximum voltage advanced by62mV and themaximum voltage reached to448mV, it improved the oxidation reduction potential catalyticeffect and at the same time increased the efficiency of electricity production. Compared with theperformance of Pt/C modified, though there were some differences in performance, it reducedtheoperation costandwasconvenienttobe putintooperation.With PANI/NR modified MFC anode, the maximum voltage reached to459mV, whichincreased by51mV, power density improved by19.97%, the apparent resistance decreased by32, the maximum power output of the battery could reach to2019mW/m3, the battery start-up time reduced by57hours, coulombic efficiency would increase24.71%. In terms of sewagetreatment, the removal rate of COD increased significantly and the maximum removal rate ofCOD reached to93.6%. It was showen that PANI/NR MFC modified anode can enhance thebiological compatibility on the one hand and increase the electron transfer rate on the anotherhand.What’s more,start-up costs has beenreduced anditshows a certainpractical significance.Studied on the removal of sewage MFC anode and the electricity generation performanceshowed that if the initial concentration of COD was532.47mg/L, the voltage of MFC wouldreach to432mV, when the initial rate of COD was768.61mg/L, the maximum voltage wouldlast for the longest193h, while lower initial COD concentration would have little effect on COD removal rate and MFC coulomb. If the hydraulic retention time was8h, the CODand ammonia nitrogen removalrates of MFC would reach to the highest level and the valued ofthem were82.40%and78.35%separately, power density and coulombic efficiency wouldreach to the highest level and the valued of them were2252.67mW/m3and29.27%separately.According to the results above, conclusion can be made that the modified MFC electrodematerials can be used in sewage treatment with a production of electricity. What’s more, itprovidesa certainreferencevalueforthefuturepractical application.