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A Study on Optimum HRT Combination for Efficient Nitrogen Removal at WWTP in Winter Days  

Gil, Kyung-Ik (서울산업대학교 토목공학과)
Lee, Un-Gil (서울산업대학교 토목공학과)
Rho, Hae-Yeon (서울산업대학교 토목공학과)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.8, no.3, 2008 , pp. 165-169 More about this Journal
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.
Keywords
Nirification; Modeling; GPS-X; ASM3; Bio-P;
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