Project #4998

Risk Benefit Assessment of Chlorite as a Co-Disinfectant for Nitrification Control in Chloraminated Drinking Water Systems

$284,196
In Progress
Principal Investigator
Rengao
Song
Research Manager
Ms. Mary Smith
Contractor
Louisville Water Company

Abstract

This research will help the water industry better understand chlorite treatment as a nitrification control technique in chloraminated drinking water systems. The research team will assess the relative risk of feeding chlorite as co-disinfectant vs. other major treatment techniques by applying the EPA’s Comparative Risk Assessment (CRA) Framework. The specific research objectives or goals include:

  1. Understand major chemical and microbial risks in chloramine systems and identify appropriate indicators for use in the risk assessment associated with major nitrification control alternatives
  2. Develop a feasible cumulative and comparative risks assessment methodology for evaluating secondary disinfection treatment
  3. Determine the health risk and cost-effectiveness of combined chloramine/chlorite disinfection vs. major treatment alternatives.

This is the first time the CRA framework will be applied to evaluate the cost benefits of nitrification control strategies. Tailored Collaboration Partner: Louisville Water Company.