ALTIVIA - Application Detail (Disinfection

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Wastewater

Public Health protection through control of disease-causing pathogenic microorganisms is the number one reason for wastewater disinfection. The Federal Water Pollution Control Act of 1972 mandated the establishment of Disinfection Standards through the establishment of Fecal Coliform Criteria. Total coliforms are an indicator species for the presence of other microorganisms such as enteric bacteria and viruses that pose a public health risk. Total coliforms are used to determine the effectiveness of water treatment and the integrity of the distribution system. In some instances, however, other human pathogens such as Giardia and Cryptosporidium are present in the absence of coliform indicators and may not be inactivated by standard disinfection practices.

Chlorine is the most common and generally the most cost effective disinfectant used to treat wastewater. Concerns regarding the formation of trihalomethanes (THMs) and disinfection byproducts (DBPs) have lead to the emergence of other technologies. Other technologies include Ozonation, UV disinfection and more recently a combination of chlorination and chlorine dioxide to reduce the potential for DBP formation in the discharged treated water. Disinfectant dose rates are generally much higher for the treatment of wastewater resulting in the requirement for dechlorination of the treated water before discharge in the case of both chlorine and chlorine dioxide. Residual disinfectants must comply with specific water quality discharge or receiving water limitations required in the WWTP’s National Pollutant Discharge Elimination System permit (NPDES).

ALTIVIA offers chlorine, sodium hypochlorite and chlorine dioxide to meet your disinfection needs.

Supporting Information

Application Bulletins

A5011-Wastewater Disinfection with Chlorine Dioxide

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