Abstract: Aggregation of microbes with particles can reduce the effectiveness of ultraviolet (UV) disinfection. This study evaluated the comparative impact of dispersed spores, dispersed spores mixed with clay particles (nonaggregated), ...

Abstract: Ultraviolet (UV) absorbance measurements are subject to significant error using a standard spectrophotometer when particles or aggregates that scatter light are present. True UV absorbance for highly turbid waters should ...

Abstract: photorepair and dark recovery was investigated in two different water sources. Sterilized drinking water and wastewater effluent treated for reuse were spiked with either wild

Abstract: Ultraviolet (UV) disinfection is now an accepted technology for inactivation of a variety of waterborne pathogens in wastewater and drinking water. However, the techniques used in much of the previous research aimed at ...

Abstract: The objective of this paper is to evaluate the change in

Abstract: Three methods of estimating effective germicidal ultraviolet (UV) dose in a collimated beam medium pressure UV system were analyzed: (1) A bioassay; (2) a mathematical model; and (3) a chemical actinometer. The bioassay ...

Abstract: Free chlorine, bovine catalase, sulfite, and thiosulfate were examined as methods for quenching residual hydrogen peroxide after advanced oxidation treatment of water for subsequent laboratory analysis. The challenges and ...

Abstract: Biodosimetry is the currently accepted method for validation of fluence delivery in ultraviolet (UV) reactors for water disinfection. This method utilizes the inactivation of a surrogate microorganism to predict the reduction ...