Fremgangsmåte og system for rensing av avloepsvann, innbefattende en ekstra slambehandling med ozonisering

摘要

Method for purifying waste water, whereby the waste water is subjected to a biological treatment producing sludge, part of this sludge being recycled towards the biological treatment while being subjected to ozonation combined with mechanical stirring. A mechanical stirring energy is brought in to attack the walls of the microorganisms.