«At present municipalities as well as the Agricultural University of Norway is considering conversion to a fully recycling and watersaving sanitation system. This interest has been rised through successful demonstration projects where both the toilet and the greywater fraction is treated. The greywater is treated to swimming water quality. New energy efficient equipment for fertilizer application is developed and the yields using liquid organic fertilizer is comparable to the yields using mineral fertilizer».
JENSSEN, P.D. (2002): Design and performance of ecological sanitation systems in Norway. Proceedings of the First International Conference on Ecological Sanitation, Nanning, China. URL [Accessed: 27.01.2019] PDF