Development of a New Water Treatment Process for Decreasing the Potential for Trihalomethane Formation

摘要

This study is concerned with the treatment of raw water to conform with the Safe Drinking Water Act. The raw water studied was from the Pequannock Watershed, which is the source of the Newark Water Supply System. The present treatment techniques at the Charlotteburg Treatment Plant were described and the quality of the water treated in the plant was examined. A new treatment technique of raw water was investigated. This new method involved the use of potassium permanganate, alum and lime. Jar tests were conducted in the preliminary phase of the study. The optimal treatment procedures were then tested in pilot plant runs at the Charlotteburg Treatment Plant. It was found that potassium permanganate treatment of raw water in dosages of 0.6 to 1 mg/l, alum dosages from 40-45 mg/l and lime dosages from 20-25 mg/l added in a proper sequence are needed to obtain drinking water of quality necessary to meet the Primary and Secondary Drinking Water Regulations. The use of the new water treatment method developed during the conduct of this study eliminates the need for prechlorination of the raw water, and thus decreases the potential for trihalomethane formation.