APPLICATION OF CHLORINATION FOR CYANOBACTERIAL TOXIN CONTROL

摘要

Filtered waters, prior to chlorine disinfection, were obtained from three wastewater treatment plants (WTPs), one in regional South Australia and two in Sydney. Samples were spiked with known concentrations of various cyanotoxins and treated with various doses of chlorine.The order of ease of cyanotoxin oxidation followed the trend, CYN > STX-eq > m-RR - m-LR > m-LA.Under the conditions of this study the oxidation of microcystins was dependent on the chlorine dose in waters from plants in Sydney, with increased removal seen at a dose of 3.0 mg L~(-1). Increasing the dose from 1.5 to 4.0 mg L~(-1) did not have an impact on the oxidation of microcystins in the South Australian water.