Isoproturon & MCPA capacity in GAC filters using the RapStech® service
When: Feb. to April ‘08
RapStech® provides a rapid method using Rapid Small
Scale Column Tests (RSSCTs) to test the capacity of Granular Activated Carbon (GAC) and determine the optimum time for regeneration
or replacement. In this project, field spent GAC was tested using RSSCTs and site water in the laboratory with pesticides
such as Isoproturon and MCPA. The quality of the GAC was also assessed for physical and chemical characteristics.
The data obtained suggest that following time in service the field spent GAC has resulted in physical and chemical changes
in adsorption characteristics. The data obtained can be used to assist with GAC service life evaluation. This strategy can
provide the water utility with a greater understanding of this critical asset and thus the capability to make more informed
operational decisions regarding regeneration frequency.
WatStech Ltd. The Technology Centre, Wolverhampton