Solutions / Municipal / Wastewater / Applications
Secondary & Tertiary Disinfection
The vast majority of wastewater treatment plants around the world provide secondary treatment through conventional activated sludge processes. Secondary processes are effective upstream of UV disinfection since they remove particles and improve water clarity.
Typical disinfection standards, such as 200 Fecal Coliforms per 100 mL on a 30 day geometric mean, are easily achieved with a suitably sized UV system. These conventional wastewater treatment plants typically discharge effluent to water bodies such as lakes, rivers and streams. UV is an ideal disinfectant for those applications since it does not alter water quality or characteristics – except for inactivating microorganisms. The addition of filtration upstream of UV, while not necessary in most cases, does improve water quality by removing more particles and allows the wastewater treatment plants to meet even more stringent permit requirements.
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