Monday, May 5, 2008
10-10

Removal of Total Nitrogen in Waste-Water Using Biological Treatment Process (I)

Eun-Tae Lim1, Sung-Hun Bhang1, Gwi-Taek Jeong2, Seok-Hwan Park3, Jae-Hee Park3, and Don-Hee Park2. (1) Taerim Industry Co., Ltd, Jeonnam, 500-757, South Korea, (2) School of Biological Sciences and Technology & Engineering Research Institute, Chonnam National University, Gwangju, South Korea, (3) Interdisciplinary Program of Graduate School for Bioenergy & Biomaterials, Chonnam National University, Gwangju, South Korea

Biological nitrification and denitrification are the most commonly used process for nitrogen removal from waste-waters. Nitrification is the autotrophic oxidation of ammonium ion, firstly to nitrite, and secondly to nitrate. However, denitrification is the heterotrophic, anoxic conversion of nitrate, firstly to nitrite, and then to gaseous nitrogen. In order to remove total nitrogen ingredients (T-N) of waste-waters discharged from D oil & fat Co. located in G-city of Korea, nitrification and denitrification process were performed using A2O4 process with waste-butanol as external carbon source. Nitrification and denitrification process were performed to plant of inlet flow of 35 µ©/d. The range of inlet concentration of total nitrogen was 220-300 mg/L during tested period. The concentration of T-N in outlet flow after denitrification process was maintained to 10~76 mg/L. The T-N removal yields of process are 67.4%, 73.8%, 96.1%, and 75% at 1, 10, 15, and 20 day of processing period, respectively. Acknowledgements : This research was financially supported by the Ministry of Commerce, Industry and Energy (MOCIE) and Korea Industrial Technology Foundation (KOTEF) through the Human Resource Training Project for Regional Innovation.

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