Alfa Laval's drum thickener applies gentle touch

摘要

In large sewage treatment works (STW), drum thickeners are used primarily to thicken raw, activated and mixed sludges to reduce the volume being sent to the digesters. In smaller, satellite STWs - typically processing 7-12m~3/h - where the usual practice is to tanker sludge to central treatment plants for processing, drums are used to thicken the sludge to reduce the volume being transported.