Study of BER-BCO Coupled Process for Purifying Simulated Micro-polluted River Water and Phosphorus Removal Mechanism
In response to the poor efficiency of traditional biofilm methods in nitrogen and phosphorus removal from slightly polluted river water,an electrode biofilm coupled biological contact oxidation(BER-BCO)device was designed.The single factor sensitivity analysis method was used to evaluate the effects of different carbon sources,current density,hydraulic retention time,and filler filling ratio on the process's nitrogen and phosphorus removal efficiency.The charac-teristic functional groups on the surface of sediment near the anode were characterized by infrared spectroscopy.The mechanism of systematic phosphorus removal was explored.The results show that the nitrogen and phosphorus removal efficiency of the BER-BCO system was significantly optimized under the conditions of using sodium acetate as the carbon source,current density of 0.09 mA/cm2,hydraulic retention time control of 24 hours,and filler ratio of 40％.The re-moval rates of NH4+-N,TN,and TP reached 83.10％,56.46％,and 97.93％,respectively.The final effluent,except for TN,is superior to the Class Ⅳ water quality standard in GB 3838-2002"Surface Water Environmental Quality Stand-ard".Infrared spectrum analysis shows that the phosphorus containing precipitate formed near the anode contains Fe-O bonds,P-O bonds,and Fe-OH bonds,indicating that the iron anode has the characteristic of efficient phosphorus removal.
electrode biofilm methodbiological contact oxidationslightly polluted river waternitrogen and phos-phorus removaliron anode
NETL
NSTL
万方数据
维普
