Inactivation of Cryptosporidium using Photoelectrocatalytic Oxidation
Photoelectrocatalytic oxidation (PECO) is an advanced oxidation process technology that incorporates ultraviolet irradiation (UV), chlorination, and hydroxyl radicals to disinfect drinking water. The goal of this research is to demonstrate the use of PECO to inactivate Cryptosporidium parvum, a waterborne pathogen, in a recirculating batch reactor system. PECO, as a point of use (POU) water treatment technology, was compared to the use of UV-only treated water when tasked with inactivating Cryptosporidium. The following parameters were investigated to optimize inactivation of Cryptosporidium: treatment device (PECO vs UV vs PCO), flowrate through the reactor, chlorine concentration, applied voltage, and concentration of oocysts. During identical operational exposures times to inactivate Cryptosporidium, the PECO achieved complete inactivation by the 3-minute sampling point.