Do process operational variables impact the fate of micropollutants in Activated Sludge Plants? POSTER
Monkhouse, C.1, Herron, D.1, Campo-Moreno, P.2, Thornton, A.3, 1Aqua Enviro, 2Cranfield Water Science Institute, 3Atkins
(free)
• The presence of organic micropollutants (OMP) within the environment is a cause for concern – 45 Priority Pollutants (PS) according to WFD.
• ASP is a globally common WwT processes and achieves partial removal of many OMP. Modelling OMP removal within ASP can
mitigate OMP emissions to the environment.
• SORPTION (adsorption and absorption) is emulated by Kd. It is a dominant removal mechanism in ASP yet is relatively understudied.
Many factors influence OMP sorption to activated sludge (AS) e.g. OMP properties & process operating conditions
• Modelling sorption can assist in quantifying the risk of biosolids when applied to land.
• A recent UKWIR trial (CHEM12) identified many PS sorb strongly within ASP. This dataset could generate valuable representative
Kd parameters for modelling sorption.
• A decade has past since models for OMP removal were last reviewed – an up-to-date review is required. • Key requirements of Models;
• Simulate sorption with complexity.
• Be suitable for future regulation and process design; i.e. model dynamically the effect of process changes.
• Be rigorously calibrated and validated using Kd parameters indigenous to the modelled ASP and representative of full scale WwT conditions.
