Date of Award
Civil and Environmental Engineering
Engineering, Sanitary and Municipal.
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This study investigated the effect of water treatment plant configurations on the formation and removal of aldehydes in a pilot water treatment plant located in Windsor, Ontario, Canada. The plant was operated in non-ozonation, pre-coagulation ozonation, and post-sedimentation ozonation treatment configurations, and ozone dose and flowrate through the anthracite/sand filters were studied to determine the effect on formation and removal of aldehydes in the pilot plant. It was found that formaldehyde, acetaldehyde, glyoxal, and methyl-glyoxal were the main aldehyde species formed as a result of ozonation, with formaldehyde usually being found to be formed at the highest concentrations. Aldehyde formation was found to increase as ozone dose was increased. For removal of aldehydes, it was found that aldehydes were removed marginally in anthracite/sand filtration, and an increase in temperature caused an increase in removal. It was found that low-molecular-mass aldehydes usually decreased, while high-molecular-mass aldehydes only slightly decreased or even increased in anthracite/sand filters, showing that glyoxal and methyl-glyoxal were more difficult to remove in anthracite/sand filtration. Aldehydes consistently showed complete removal in GAC contactors. Finally, at low flowrates through the anthracite/sand filters, there appeared to be a minimum level of aldehydes present in the anthracite/sand filters.Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1996 .C41. Source: Masters Abstracts International, Volume: 37-01, page: 0356. Adviser: N. Biswas. Thesis (M.A.Sc.)--University of Windsor (Canada), 1996.
Cervi, Stephan., "Formation and removal of aldehydes as ozonation by-products in a pilot-scale water treatment plant." (1996). Electronic Theses and Dissertations. 2146.