EFFECTS OF DISINFECTION ON ORGANIC SUBSTANCES IN WATER (DWQ 9005) Meeting report, IOA Tenth Ozone World Congress
Report No DWI0297

Feb 1992

SUMMARY

This report summarises information obtained at the 10th Ozone World Congress, held in Monaco in March 1991. The main aspects covered in this report include; ozone and disinfection, drinking water treatment, ozonation by-products and destruction of micropollutants. The information is relevant mainly to DoE project PECD 7/7/137 - Effects of disinfection on organic substances in water, but there is also some relevance to DoE projects PECD 7/7/236 - Efficiency of alternative disinfectants, and PECD 7/7/235 - Microbial growth on materials.

There is undoubtedly a trend towards increasing use of ozone as well as advanced oxidation processes for drinking water treatment in many countries. Although there is considerable concern about the toxicity (potential carcinogenicity) of some ozonation by-products (bromate, aldehydes) in other circles, this meeting paid little attention to such potential problems.

A report of considerable increases in formaldehyde concentrations after boiling of chlorinated and ozonated water warrants further investigation.

Copies of this report may be available as an Acrobat pdf download under the 'Pre 2000 Reports' heading on the DWI website.