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This powerpoint presentation begins by providing a brief overview of the formation of organic chloramines and their role in causing water quality problems. The objective of this study was to understand the reactions between freechlorine and monochloramine withmicrobes/their related materials, focusing on theformation of organic chloramines and theirassociated biocidal efficacy. Materials and methods included:Extracellular Polymer Substances (EPS) extraction; Heterotrophic Plate Count (HPC) Bacteria preparation; organic chloramines formation experiments; and, inactivation studies. Presentation conclusions indicate the following:organic chloramines can be formed by a reaction betweendisinfectants and microbe/their related materials (e.g., EPSand planktonic bacteria) in the distribution systems;organic chloramines produced from EPS and cell surfacesgive total DBP colorimetric responses;organic chloramines may remain on/within the biomass,not "solubilize" into solution; and,since formed organic chloramines do not have inactivationefficacy, the formation of organic chloramines may causethe water quality problem in the distribution system. Includes tables, figures.

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Edition: Vol. - No. Published: 11/01/2008 Number of Pages: 27File Size: 1 file