1. Decentralized greywater treatment in urban areas - Klosterenga, OSLO Klosterenga Compiled by: Petter D. Jenssen, Norwegian University of Life Sciences (UMB)

2. Klosterenga oversikt Pretreatment Biofilter (PBF) Horisontal subsurface flow CW 33 apartments 100 persons Area 1m 2 /person Greywater treatment in urban areas - Klosterenga, OSLO

3. NORWEGIAN UNIVERSITY OF LIFE SCIENCES www.umb.no Department of Plant and Environmental Sciences P.D. Jenssen 3 Greywater treatment in urban areas - Klosterenga, OSLO Principle system design The greywater treatment system consists of a septic tank followed by a pump chamber, pretreatment biofilter (domes with spray nozzles overlaying the light weight aggregate biofilter), wetland filter (filterbed) and an outlet container. See also........

4. 4 NORWEGIAN UNIVERSITY OF LIFE SCIENCES www.umb.no Klosterenga - Pretreatment biofilter under construction 4 Department of Plant and Environmental Sciences, P.D. Jenssen

5. 5 NORWEGIAN UNIVERSITY OF LIFE SCIENCES www.umb.no Klosterenga - Wetland filter under construction 5 Department of Plant and Environmental Sciences, P.D. Jenssen

6. 6 NORWEGIAN UNIVERSITY OF LIFE SCIENCES www.umb.no Greywater treatment at Klosterenga Oslo Effluent values: Fecal coliforms: <10 Total-N: 2,5 mg/l Total-P: 0,02 mg/l Department of Plant and Environmental Sciences, P.D. Jenssen

7. NORWEGIAN UNIVERSITY OF LIFE SCIENCES www.umb.no Department of Plant and Environmental Sciences P.D. Jenssen 7 Local discharge

8. NORWEGIAN UNIVERSITY OF LIFE SCIENCES www.umb.no Department of Plant and Environmental Sciences P.D. Jenssen 8 Irrigation

9. NORWEGIAN UNIVERSITY OF LIFE SCIENCES www.umb.no Department of Plant and Environmental Sciences P.D. Jenssen 9 Groundwater recharge

10. NORWEGIAN UNIVERSITY OF LIFE SCIENCES www.umb.no Department of Plant and Environmental Sciences P.D. Jenssen 10 Inhouse use ? Greywater treatment at Klosterenga Oslo Effluent values: Fecal coliforms: <10 Total-N: 2,5 mg/l Total-P: 0,02 mg/l

11. NORWEGIAN UNIVERSITY OF LIFE SCIENCES www.umb.no Department of Plant and Environmental Sciences P.D. Jenssen 11 Greywater treatment in urban areas - Klosterenga, OSLO References/links Jenssen, P.D. 2001. ” Design and performance of ecological sanitation systems in Norway ”, Paper at The First International Conference on Ecological Sanitation, Nanning, China. Design and performance of ecological sanitation systems in Norway Jenssen, P.D. & Vråle. 2004. Greywater treatment in combined biofilter/constructed wetlands in cold climate. In: Werner, C. et al. (eds.). Ecosan – closing the loop. Proceedings of the 2 nd Int. Symposium on Ecological Sanitation, Lübeck, 7 th -11 th April, 2003. GTZ, Germany, 875-881.Greywater treatment in combined biofilter/constructed wetlands in cold climate Jenssen. P.D. 2005. Decentralized urban greywater treatment at Klosterenga Oslo. In: H. v. Bohemen (ed.) Ecological engineering-Bridging between ecology and civil engineering, Æneas Technical Publishers, The Netherlands, pp 84-86.Decentralized urban greywater treatment at Klosterenga Oslo http://www.youtube.com/ Film about the function of a constructed wetland according to Norwegian design (cold climate). The film is made by Maxit the manufacturer of Filtralite an expanded clay product with high porosity and a large surface area. These qualities make the Filtralite very well suited as filter media for treating water.