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Prototype at Kaja Student Dormitories in Norway

The Norwegian University of Life Sciences (UMB) follows the vision of a zero-emission campus. A first step towards this vision has been realized at Kaja Student Dormitories that have been equipped with a source separating sanitary system. Water from kitchen and washing facilities is collected separately and treated in a constructed wetland.

Less water consumption

Jets™ vacuum toilets are providing the students the same bathroom comfort as at home at 20% of the water consumption of a conventional toilet system. The blackwater (wastewater from toilets) is pumped to the UMB environmental test and demonstration laboratory where it can be used for different experiments and prototype testing. UMB is a Nordic competence centre for ecological sanitation.

Membrane technology

The SANBOX prototype to be tested at the Kaja Student Dormitories will be a novel solution for the numerous weekend houses and tourist lodges over the whole of Scandinavia. Due to the northern latitude, Scandinavia differs from the Alps and the Mediterranean area and solar radiation will not be sufficient to evaporate wastewater. The prototype at Kaja Student Dormitories will therefore focus on high treatment performance using membrane technology to reach excellent effluent quality with low energy consumption. Solid residues will be composted so that they can be reused for local agriculture



July 2009 - August 2010

Developing of technology at the different SANBOX partners

September 2010 - October 2010

Installation and initial test

October 2010 - April 2011

Test and monitoring


Components foreseen for prototype and partners involved in its development:


Involved partners

Vacuum toilet system

Jets AS, Norway

Compost filter for blackwater
(wastewater from toilets)

Jets AS, Norway
Norwegian University of Life Sciences (UMB), Norway

Membrane based post treatment system
for blackwater liquid fraction

Bioazul SA
Technologie Transfer Zentrum Bremerhaven (TTZ), Germany

Composting system for solid residues and
recycling nutrients for local agriculture

Seecon GmbH, Switzerland
Norwegian University of Life Sciences (UMB), Norway


Flow chart for the planned prototype at Kaja Student Dormitories © 2011