UPGRADING OF ACTIVATED-SLUDGE SYSTEMS FOR NITROGEN REMOVAL BY APPLICATION OF THE LINPOR(R)-CN PROCESS

LINPOR(R)-systems are modified activated sludge plants, where the aeration tanks contain a certain quantity of highly porous plastic foam particles, which serve as a carrier material for active biomass. Thus a substantial performance improvement is achieved as compared to conventional activated sludge systems without having to renounce the well proven elements of the activated sludge technology. The LINPOR(R)-CN process for the simultaneous elimination of organic and nitrogen pollutants is particularly suitable for upgrading existing plants, because it can be made to fit into existing tanks with no or only little change of the once installed facilities.