Drinking Water Engineering and Science Discussions www.drink-water-eng-sci-discuss.net 1996-9473 1996-9481 2 2 2009 10.5194/dwesd-2-161-2009 http://www.drink-water-eng-sci-discuss.net/2/161/2009/ http://www.drink-water-eng-sci-discuss.net/2/161/2009/dwesd-2-161-2009.html http://www.drink-water-eng-sci-discuss.net/2/161/2009/dwesd-2-161-2009.pdf 161 187 2009-10-09 NOM removal technologies – Norwegian experiences H. Ødegaard hallvard.odegaard@ntnu.no S. Østerhus E. Melin B. Eikebrokk Department of Hydraulic and Environmental Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway Water and Environment, SINTEF, 7491 Trondheim, Norway The paper gives an overview of the methods for removal of natural organic matter (NOM), particularly humic substances (HS), in water with focus on the Norwegian experiences. It is demonstrated that humic substances may be removed by a variety of methods, such as; molecular sieving through nanofiltration membranes, coagulation with subsequent floc separation (including granular media or membrane filtration), oxidation followed by biofiltration and sorption processes including chemisorption (ion exchange) and physical adsorption (activated carbon). All these processes are in use in Norway and the paper gives an overview of the operational experiences. Azrague, K., Østerhus, S. W., and Leiknes, T.: Assessment of the OBM-process for drinking water treatment, Proc. Int. Wisa Membrane Technology Conference 2009, Stellenbosch, South-Africa, 13–15 May 2009. Bolto, B. A., Dixon, D. R., Eldridge, R. J., and King, S. J.: The use of cationic polymers as primary coagulants in water treatment, in: Chemical water and wastewater treatment V, edited by: Hahn, H. H., Hoffmann, E., and Ødegaard, H., Springer Verlag, Berlin Heidelberg, 173–185, 1998. 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