PAC and Ozonation for Controlling Drinking Water Tastes and Odors

摘要

Both PAC and ozone are feasible of mitigating T&O in Detroit source water. However, the performance of PAC is greatly affected by both water quality and operation conditions. Applying PAC at the intake, which has long contact time, no chlorine or alum, provides the most favorable conditions for adsorption of odorants. Chlorine and alum also affects the PAC performance to certain degrees and varied with the PAC brands, and other process conditions.Ozonation removal of odorants, under the tested conditions, almost exclusively depends on ozone dose. Hydrogen peroxide addition has no significant impact odorant removal from Detroit River water. Ozonation feasibility tests include factor screening of main operational and water quality factors, dose-response relationship development of the key factors. A statistical dose-response model is also developed for determining the ozone dosage for various target odorant removals as function of initial odorant level.MIB is the most difficult to remove among tested odorants by both PAC and ozone treatment processes.