||BBK filter media
||Traditional filter media
||Completely composted organic material, Leca, Moler and other additives.
||Sphagnum, heather, bark, wood chops, coconut fibres, grape stones, pine needles etc.
||Low during the entire lifetime
||Rising concurrently with the decomposition of the filter media
||Constantly even distribution
||Uneven, formation of canals
||Open bed systems
||High, typical >95%, constant
||Low, typical <75%, large variations
||High biological activity. Large content of specific odour-removing M.O. selected for the individual type of industry
||Broad variety of micro-organisms, accidental, uncontrolled flora e.g. from activated sludge. Small percentage of odour- removing M.O.