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Journal of the Korean Society of Hazard Mitigation 2008;8(3):165-169.
Published online June 30, 2008.
동절기 하수처리장에서 효율적인 질소제거를 위한 최적 HRT조합 도출에 관한 연구
길경익, 이운길, 노해연
A Study on Optimum HRT Combination for Efficient Nitrogen Removal at WWTP in Winter Days
Kyung-Ik Gil, Un-Gil Lee, Hae-Yeon Rho
Abstract
It has been reported that most wastewater treatment plants have difficulties in nitrogen removal during winter season due to declined activity of nitrifiers in the condition of low temperature. This study was conducted in order to find out optimum operating condition for efficient nitrogen removal in low temperature. A series of operating conditions with various HRTs of each tank were simulated using the GPS-X program. The optimum HRT combination for effective nitrogen removal was 0.3 hr/0.5 hr/1.36 hr/4.84 hr(PreAx/An/Ax/Ox) with 51.4% of T-N removal efficiency and 57.3% of $NH_4^+$-N removal efficiency.
Key Words: Nirification; Modeling; GPS-X; ASM3; Bio-P
요지
대부분의 하수처리장에서는 동절기에 수온저하로 인한 질산화 미생물의 활동저하 때문에 질소제거에 어려움을 많이 겪고 있다. 본 연구에서는 이러한 문제점을 해결하기 위하여 하수처리 시뮬레이션 프로그램인 GPS-X를 사용하여 각조의 HRT를 변화시켜 저 수온시 효율적인 질소제거를 위한 HRT의 조합을 도출하고자 하였다. 본 연구에서 도출한 최적의 HRT 조합은 0.3 hr/0.5 hr/1.36 hr/4.84 hr(PreAx/An/Ax/Ox)이고 이때의 T-N 제거율은 51.4%, $NH_4^+$-N는 57.3%의 제거율을 보였다.
핵심용어: 질산화; 모델링
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