Wastewater disinfection by ozone: Influence of water quality and kinetics modeling

Wastewater disinfection by ozone was investigated at pilot scale on differe nt effluents. The organic matter (COD and TOC) was shown to have the bigges t influence on the ozone demand of the effluents. Disinfection of fecal ind icators could be modeled as the reaction on a double population. The presen ce of more resistant microorganisms results in the need for higher treatmen t doses and a tertiary filtration when the affluent has to meet the stringe nt Title 22 standard. Eventually, the high virucidal power of ozone makes i t very attractive when viruses are targeted.