Treatment Efficiency of Domestic Sewage Using Iron-Carbon Filler Coupled Biofilm
Different types of iron-carbon micro-electrolysis fillers were prepared by sintering at high temperatures ranging from 700 to 1 000℃.Static experiments demonstrated that adding aluminum-doped iron-carbon micro-electrolysis fillers to domestic sewage significantly improved treatment efficiency,with removal rates of NH₄⁺-N,COD,and TN reaching 6.18%,44.18%,and 6.86%,respectively-better than those achieved by other fillers.The removal rate of TP using the aluminum-doped iron-carbon filler was 33.45%,which was lower than the 35.53% achieved by the iron-carbon micro-electrolysis filler doped with magnesium carbonate.However,considering the overall treatment performance,the aluminum-doped iron-carbon micro-electrolysis filler was the most effective for treating domestic sewage.This selected filler was added to a biofilm reactor,successfully forming a membrane.The results showed that the biofilm reactor with the iron-carbon micro-electrolysis filler achieved average effluent removal rates of 85%,89%,79%,and 81% for NH₄⁺-N,COD,TN,and TP,respectively.
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