University of Tehran International Journal of Environmental Research 1735-6865 6 2 2012 02 29 Long term Evaluation of the Effect of Salinity on Organic Removal and Ammonium Oxidation in a down-flow Hanging Sponge Reactor361 366 en S. Uemura Department of Environmental Engineering, Kisarazu National College of Technology, 2-11-1 Kiyomidaihigashi, Kisarazu, Chiba 292-0041, Japan M. Kimura Department of Environmental Systems Engineering, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka 940-2188, Niigata, Japan T. Yamaguchi Department of Environmental Systems Engineering, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka 940-2188, Niigata, Japan A. Ohashi Department of Social and Environmental Engineering, Hiroshima University, Kagamiyama 1-4-1, Higashi-Hiroshima, Hiroshima 739-8527, Japan Y. Takemura Department of Civil Engineering, Tohoku University, Aoba 6-6-06, Aramaki, Aoba, Sendai, Miyagi 980-8579, Japan H. Harada Department of Civil Engineering, Tohoku University, Aoba 6-6-06, Aramaki, Aoba, Sendai, Miyagi 980-8579, Japan 2012 02 29