Alternative disinfectant chemicals for trihalomethane control ‐ a review

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Abstract
Chlorination is the most commonly used and best characterised process for disinfection of drinking water. Concern over the possible health risks of chlorination by‐products, particularly trihalomethanes, has led to a re‐evaluation of existing treatment processes and the benefits of using alternative disinfectants to chlorine. The general characteristics of, and the advantages and disadvantages of four possible alternative disinfectants (ozone, chlorine dioxide, chloramines and potassium permanganate) in drinking water treatment are reviewed.