THE ACTIFLO METHOD

The Actiflo method is a compact physico-chemical water treatment metho d. The method has for many years been used in waterworks for the treat ment of surface water to produce drinking water, but is now to an incr easing extent being used for treating wastewater and combined sewer ov erflows (CSO). The method works as weighted settling combined with lam ella settling. Typical treatment efficiency: suspended solids 85%, COD 60%, Kjeldahl N 18% and total P 85%. The method also permits efficien t removal of heavy metals. Kruger has a mobile pilot plant with a capa city of 80-120 m(3)/h in Scandinavia and a similar pilot plant in the USA. As an Actiflo plant can be started up in less than 15 minutes, it has many applications. Several applications may also be combined, e.g . treatment of overflows during rain and treatment of lake water in th e recipient nearby in dry weather. As an alternative to detention basi ns in combined sewer systems the Actiflo method is often a competitive method. (C) 1998 IAWQ. Published by Elsevier Science Ltd.