| Title |
Effects of temperature, C/N ration and C/P ratio on nitrogen phosphorus removal in KSDeN(TM) process |
| Authors |
서인석 ( In Seok Seo ) ; 김병군 ( Byung Goon Kim ) ; 홍성택 ( Sung Taek Hong ) ; 박철휘 ( Chul Hwi Park ) ; 김도군 ( Do Gun Kim ) ; 천상욱 ( Sang Ook Chun ) |
| Abstract |
In this study. the effects of temperature, C/N ratio and C/P ratio on the nutrients removal efficiencies of an intermittent aeration activated sludge process(KSDeN^TM process) were investigated with a pilot plant fed with the grit chamber effluent of `J` MWWTP. The effluent TCOD_Cr, and TBOD_5 were less than 10 mg/L, although the influent concentrations of organics and nutrients showed wide fluctuations. T-N removal efficiency and nitrification efficiency increased with increasing temperature and C/N ratio. The results of this study showed that the performance of KSDeN^TM process was more sensitive to the variation of temperature than that of C/N ratio, However, T-N removal efficiency was more than 60% at 10℃, and more than 70% at low C/N ratio of 3.0. T-P removal efficiency was more than 80% at C/P ratio of 30 or above, and it was higher at relatively low temperature and high C/P ratio (TCOD_Cr/T-P ratio), It is considered that the competition on organic compounds between PAOs and denitrifiers resulted in lowering T-P removal by activating nitrifiers with increasing temperature. |