AWWA ACE62950

This slide presentation outlines the significance, treatment and management of cyanobacteria and cyanotoxins along with ozonation of cyanobacterial toxins, specifically: effects of ozone dose, pH, natural organic matter (NOM); toxicity; and, byproducts. Conclusions were that: ozonation was very effective to detoxify naturally occurring microcystins in water; reaction pH was an important factor for microcystin degradation by ozonation; the presence of NOM lower the removal efficiency of microcystin; toxicity of microcystin solution increased at insufficient ozone doses; a number of ozonation byproducts were identified; degradation pathway was proposed; and, destruction of Adda moiety coincided with detoxification of microcystins. Includes figures.