KINETICS OF NITRATE FORMATION IN BREAKPOINT CHLORINATION

Authors: Phillip, Neal; Diyamandoglu, Vasil

Source: Proceedings of the Water Environment Federation, Disinfection 2000 , pp. 145-152(8)

Publisher: Water Environment Federation

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Abstract:

The kinetics of nitrate formation during chlorination of aqueous ammonia-nitrogen above breakpoint levels was studied in batch mode at 25°C and pH ranging between 6.6 and 8.7. The time dependent species profiles indicate that a substantial fraction of ammonia is converted to nitrate while combined chlorine species rapidly form and decay. For all experimental conditions, nitrate concentration approached an asymptote as combined chlorine species fully decayed and free chlorine concentration leveled off. The rate of nitrate formation was found to increase with increasing MDR (chlorine to ammonia-nitrogen molar dose ratio) and initial ammonia concentration, but decreased as solution pH became more basic.

Document Type: Research article

DOI: http://dx.doi.org/10.2175/193864700785372442

Publication date: 2000-01-01

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Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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