Abstract: This paper presents a new mathematical model of bacterial regrowth in distribution systems, which combines hydraulic calculations, inclusive of dispersion, with a description of the following microbial processes: free and ...

Abstract: Experimental data on biofilm shearing were collected for columns packed with granular activated carbon. The columns were operated under dynamic conditions, experiencing a wide range of biodegradation rates. Under conditions ...

Abstract: A simple laboratory test, referred to here as the dredging elutriate test (DRET), was sought to predict the concentration of contaminants in the water column at the point of dredging. The DRET is procedurally similar to ...

Abstract: The effects of solution chemistry, surface shear, and composition of natural organic matter (NOM) were investigated for their impact on accumulation of foulant material at the surface of charged polymeric nanofiltration ...

Abstract: A mathematical model of simultaneous adsorption and biodegradation in beds of sorptive media is developed and tested. The model considers a single substrate; it describes adsorption by the Fruendlich isotherm and surface ...

Abstract: Studies were conducted to examine the effect of solution chemistry, defined here as pH and ionic strength, on the permeability of negatively charged polymeric nanofiltration membranes. Water permeation through the membrane ...

Abstract: Water utilities rely on samples collected from the distribution system to assure the quality of drinking water delivered to customers. However, few utilities employ a systematic sampling protocol to collect these samples. ...