Experience in introducing UV disinfection of effluents at operating extremely large-scale treatment facilities

Summary

The experience of Mosvodokanal JSC in introducing the technology of effluent disinfection is presented. The paper describes the problem, typical for the Moscow treatment facilities, of ensuring the effluent disinfection in line with the regulatory requirements. The results of long-term experimental-industrial and pilot tests for the UV-disinfection of wastewater after biological treatment carried out at the Kurianovskie wastewater treatment facilities using domestic UV equipment, revealed the high efficiency and stability of disinfection up to the standard requirements under conditions of actual fluctuations in the physical and chemical indicators of wastewater quality. The high efficiency of UV disinfection in relation to specific microorganisms, resistant to chlorination, such as viruses, coliphages, protozoan cysts, has been established. The tests carried out provided for evaluating the effectiveness of UV disinfection and developing a concept for the application of UV disinfection at the Moscow wastewater treatment facilities.

Key words

disinfection , ultraviolet , wastewater , viruses , toxicity , UV-plant , operation experience