ISO 19654:2025

This method gives a standardized procedure for the conditioning operation when selecting a conditioning product at laboratory scale and also for the production of flocculated thickened sludge for subsequent dewatering tests. This document provides a method for laboratory chemical conditioning of sludge. The method applies to sludges and suspensions from: — storm water handling; — urban wastewater collecting systems; — urban wastewater treatment plants; — industrial wastewater that has been treated similarly to urban wastewater; — water supply plants. This document is applicable to all sludge that can have similar environmental or health impacts, or both, with exclusion of hazardous sludge from industry and dredged sludge.