폐타이어 담체를 이용한 파일럿 규모 유동상 생물막 공정에서 하수의 인제거에 미치는 운전인자 영향

초록

This work experimentally determined the effect of operating parameters such as temperature and solid retention time (SRT) on the phosphorus removal of municipal wastewater with waste-tire media. The experiments were carried out in pilot-scale moving bed biofilm reactor filled at a 0.15 filling ratio with the media. Total phosphorus (TP) removal efficiency was 91±5, 75±16, and 59±14% at the temperature of 9～10, 10～20, and 20～26°C, respectively. TP removal efficiency was 71±17, 74±16, 74±16, and 68±18% at the SRT of 3.5～5, 5～10, 10～15, and 15～20 days, respectively. At the nitrate concentration of 1～3, 3～6, and 6～9 mg/L, TP removal efficiency was 82±9, 68±18, 47±7%, respectively. The concentration of total phosphorus in the effluent was 0.1～1.8 (0.8±0.4) mg/L regardless of operating conditions, which meets Korean phosphorus limit value, 2 mg/L, for discharge into receiving waters.

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