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REMOVAL OF SYNTHETIC ORGANIC CHEMICAL CONTAMINANTS IN DRINKING WATER: RASCO, INC. ADVANCED SIMULTANEOUS OXIDATION PROCESS (ASOP)
Citation:
NSF INTERNATIONAL. REMOVAL OF SYNTHETIC ORGANIC CHEMICAL CONTAMINANTS IN DRINKING WATER: RASCO, INC. ADVANCED SIMULTANEOUS OXIDATION PROCESS (ASOP). U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-07/109, 2007.
Impact/Purpose:
to present information
Description:
The RASco, Inc. ASOP Drinking Water Treatment Module was tested at NSF’s Laboratory for the reduction of the following chemicals of concern: aldicarb, benzene, carbofuran, chloroform, dichlorvos, dicrotophos, methomyl, mevinphos, nicotine, oxamyl, paraquat, phorate, sodium fluoroacetate, and strychnine. The ASOP is a component of RASco’s Hyd-RO-Secure™ Series 2 Anti-Terrorism/Force Protection Drinking Water Treatment System, which uses reverse osmosis (RO), the ASOP module, and a post-ASOP activated carbon filtration to treat drinking water. The ASOP module uses ultraviolet light (UV) and ozone to oxidize contaminants. An activated carbon filter was evaluated to demonstrate its capability to adsorb any oxidation byproducts and/or the amounts of challenge chemicals not oxidized by the ASOP module. The target chemical challenge concentration was 1,000 micrograms per liter (µg/L), and each challenge was 30 minutes in length. Both the ASOP module and activated carbon filter were tested at the same time, with the carbon filter plumbed downstream of the ASOP module. Treated water samples were collected from both the ASOP and carbon filter effluents, so that the ASOP module’s performance could be evaluated alone, and also combined with activated carbon treatment. The percent reductions for the ASOP module alone ranged from zero for carbofuran, chloroform, and mevinphos, to 98% for strychnine. The combination of the ASOP and activated carbon filter removed all challenge chemicals, except paraquat, by 94% or more.