Effect of dissolved organic matter (DOM) and biofilm on the adsorption capacity of powdered activated carbon in activated sludge

Abstract

The objective of this study is to clarify the effect of DOM and biofilm on the adsorption capacity of PAC in the aeration tank of PACT process. The adsorption capacity of PAC for 3,5-DCP was significantly decreased by the addition into the aeration tank. The decrease in the adsorption capacity significantly deteriorated the performance of PACT process. The adsorption of DOM with molecular weight ranged from 50,000 to 300,000 Da decreased the adsorption capacity of PAC in the aeration tank for 3,5-DCP. However, DOM with molecular weight less than 50,000 Da and more than 300,000 Da had little effect on the adsorption capacity of PAC in the aeration tank.