Papers

Magnhild Føllesdal, Helle Frodahl and Ola Toftdahl:" Use of down-flow dual media granular filters to obtain strict discharge limits at Bekkelaget WWTP in Norway"

Gisvold, B., Ødegaard, H. and Føllesdal, M.:"Enhanced removal of ammonia by combined nitrification/adsorption in expanded clay aggregate filters". Wat. Sci. Tech. Vol. 41, No 4-5, 2000.

Ødegaard, H., Gisvold, B., Helness, H., f. Sjøvold and Z.Liao:"High rate biological/chemical treatment based on the moving bed biofilm process combined with coagulation". In: Hahn, H.H., Hoffmann, E., Ødegaard,H.(eds) : "Chemical water and wastewater treatment VI". Springer Verlag Berlin Heidelberg, 2000, pp 245- 255

Conference proceedings

Leiknes, T, Ødegaard, H. and Alvik, S:"Removal of ammonium in filters based on expanded clay media (Filtralite ZL)" in Torolfsson, S. (red): VAR-forskningsdagene '98, NTNU 8.-9. juni, 1998, TAPIR Forlag ISBN 82-519-1347-0, pp 187-197, 1998

Gisvold, B., Ødegaard, H, Føllesdal, M. "Enhancing the removal of ammonia in nitrifying bio-filters by the use of a zeolite containing expanded day aggregate filtermedia". 8th IAWQ Con-ference on Design, Operation and Economics of Large Wastewater Treatment Plants. Budapest, Hungary, 6-9 sept. 1999.

Gisvold, B, Ødegaard, H, Føllesdal, M. "Enhanced removal of ammonia by combined adsorpt-ion/nitrification in expanded day filters". Proc. IAWQ Conference on Biofilm Systems. New York, USA, 17-20 Oct. 1999.

Reports

Gisvold, B.: "Fjerning av ammonium I avløpsvann med Filtralite ZL". Rapportnr. STF22 F98337, 1998 (Fortrolig)

Fløgstad, H.: Filtralite-P resultater fra isotermforsøk og kolonneforsøk. Rapportnr, F99304, 1999 (Fortrolig)

Eikebrokk, B. og Saltnes, T.: "Attrition of Filtralite HC 2.0-5.0 during backwash. Report nr. STF22 F99302 (Restricted)

Sjøvold, F: SC1.3 Enhanced separation-filtration. Reportno STF22 F99312, 1999 (Fortrolig Oppdr.giver: Anglian Water Ltd.).

Diploma thesis 

Kinga Adam: "LIght weight aggregates and shellsand. Filter materials for phosphorous sorption in small-scale wastewater treatment systems". Norwegian University of Life Sciences. ISSN: 1503-1667, ISBN: 82-575-0717-2, 2006

Trond Mæhlum: "Cold climate constructed wetlands: Aerobic pre-treatment and horizontal subsurface flow systems for domestic sewage and landfill leachate purification". Jordforsk Centre for Soil and Environmental Research, ISSN 0802-3220, ISBN 82-575-0348-7, 1998

Alvik, Solveig : "Anvendelse av aggregater av ekspandert leire (Filtralite ZL) for fjerning av ammonium i avløpsvann". Institutt for vassbygging, NTNU, D1-1997-27.