This document specifies a method for the determination of the settleability of sludge suspensions. This document is applicable to sludge suspensions from:
-- storm water handling;
-- urban wastewater collecting systems;
-- urban wastewater treatment plants;
-- treating industrial wastewater similar to urban wastewater (as defined in Directive 91/271 EEC);
-- water supply treatment plants.
This method is also applicable to sludge suspensions from other origin.