Comparison between adsorption of poliovirus and rotavirus by aluminum hydroxide and activated sludge flocs

Abstract

Adsorption of poliovirus and rotavirus by aluminum hydroxide and activated sludge flocs was studied. Both adsorbed greater amounts of poliovirus than rotavirus. Aluminum hydroxide flocs reduced the titer of poliovirus in tap water by 3 log10, but they only reduced the titer of a simian rotavirus (SA-11) in tap water by 1 log10 or less and did not noticeably reduce the number of human rotavirus particles present in a dilute stool suspension. Activated sludge flocs reduced the titer of added poliovirus by 0.7-1.8 log10 and reduced the titer of SA-11 by 0.5 log10 or less. There is a basic difference in the adsorptive behavior of enteroviruses and rotaviruses and water and wastewater treatment processes that are highly effective in removal of enteroviruses may not be as effective in removing other viral groups such as rotaviruses.