알루미늄 부식을 조합한 생물학적공정의 질소와 인 제거

Abstract

A new dephosphorization technique which is simple and stable is necessary. In this system, phosphorus from domestic sewage is precipitated as aluminium phosphate by aluminium ion generated with the electrochemical interaction(localized corrosion) of aluminium. In order to remove phosphorus contained in domestic sewage, an experimental investigation is performed using intermittently aerated activated sludge process packed with aluminium and copper wire. The experimental results were obtained as follows. As to the aluminium wire and copper wire ratio, (1:1) liked the efficiency and as the length was long, the removal efficiency was the best and as the length of the aluminium wire was long, the phosphorus removal hour as to length, was shortened in the situation where the ratio is identical. The more the chloride concentration was high, if the aluminium wire and copper wire was used repeatedly, the time to remove the phosphorus was shortened In the continuous system driven with 4 hours of HRT, as the corrosion was progressed, PO4-P was removed until the 17th days over 0.2 mg/L and the removal efficiency began to drop starting from the 18th days and PO4-P showed 0.26 ~ 0.58 mg/L from the 21th days In continuous experiment by the biological processor assembling the aluminium wire corrosion COD and T-N displayed the removal efficiency of 97% and 57% and PO4-P displayed the tendency that it displayed 84% of removal efficiency but was eliminated in 50 ~ 68 days of experiment until 0.1 mg/L and then it increased a bit and increases to 1 mg/L near.