Comparison of Chlorination and zonation Disinfection for Municipal Wastewater Reclamation

For the microbial Safety of municipal reclaimed wastewater, comparison of chlorination and ozonation disinfection efficiency was investigated. Chlorination can not completely inactivate the E. coli, which reduce to 100 count/L and maintain stabilization with chlorination dose increasing to 16mg/L, and different chlorination disinfectors have almost disinfect efficiently. As a strong disinfection, the same inactivation efficiency of E. coli as chlorination could be achieved an ozone dose of 7 mg/L, and its running cost is about 0.06 yuan/m(3).