ISO 19654:2025

Sludge recovery, recycling, treatment and disposal — Laboratory chemical conditioning procedure

Scope

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.