Introduction
The European waste framework directive sets targets for recycling of household waste of minimum 50 %
in 2020 [1]. With regards to the organic waste the EU-member states must take measures to promote (a)
separate collection of organic waste in preparation for composting and biogasification of the organic waste
(b) treatment of organic waste in such a way that it fulfils a high level of environmental protection and (c)
use of environmentally friendly materials produced by organic waste [1].