Title: Trihalomethane reduction in drinkable water by controlled chlorination and use of hydrogen peroxide

Authors: P. Albertin, L. Angelin, G. Navazio, S. A. Rienzi

Addresses: Istituto di Chimica Industriale, Ingegneria, Padua, Italy. ' Istituto di Impianti Chimici, Ingegneria, Padua, Italy. ' Istituto di Chimica Industriale, Ingegneria, Padua, Italy. ' Istituto di Impianti Chimici, Ingegneria, Padua, Italy

Abstract: The reduction of trihalomethane (THM) formation in the water treatment process by a controlled chlorination of ammonia and successive quenching with hydrogen peroxide has been studied. The optimum values of the process parameters have been determined with a calculation programme that makes use of the kinetic constants determined with the water to be treated. The obtained data have been verified on a pilot plant built in parallel to a water treatment plant located near Venice, Italy. A good agreement was found between experimental and calculated values. The results confirmed that with a controlled chlorination and use of hydrogen peroxide the concentration values for ammonia in the exit flow are less than 0.3 p.p.m. and the THM formation is reduced from 50-70 p.p.b. to 10-15 p.p.b.

Keywords: ammonia; chlorination; disinfectant; hydrogen peroxide; oxidation; trihalomethane reduction; water treatment plants; drinking water; Italy.

DOI: 10.1504/IJEP.1992.028493

International Journal of Environment and Pollution, 1992 Vol.2 No.1/2, pp.97 - 107

Published online: 18 Sep 2009 *

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