Record Display for the EPA National Library Catalog
RECORD NUMBER: 32 OF 77
|OLS Field Name||OLS Field Data|
|Main Title||Ozonation and biological stability of water in an operating water treatment plant. /|
|Author||Reasoner, D. J. ; Rice, E. W. ; Fung, L. C.|
|CORP Author||Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. ;Hackensack Water Co., Haworth, NJ.|
|Publisher||US Environmental Protection Agency, Rish Reduction Engineering Laboratory,|
|Subjects||Water--Purification--Ozonization. ; Water--Purification--Biological treatment. ; Biodegradation.|
|Additional Subjects||Water treatment plants ; Ozonation ; Potable water ; Biological effects ; Water pollution ; Water quality ; Bioassay ; Physical chemical treatment ; Flocculation ; Filtration ; Chlorination ; Disinfection ; Aquatic microbiology ; Biodeterioration ; Halomethanes ; Bacteria ; Reprints|
|Collation||22 pages : illustrations ; 29 cm|
Ozonation of drinking water may adversely affect the biological stability of the finished water. The study was designed to assess the effect of ozone as a preoxidant on the nutrient status of water treated in a full-scale water treatment plant. The study was conducted over a ten week period with analyses performed on a weekly basis. The Haworth Water Treatment Plant is a direct filtration plant utilizing ozonation, alum and cationic polymer flocculation, flotation-skimming, and dual media (anthracite-sand) filtration. Chlorine is added just prior to the filtration process to maintain a residual in the filter effluent. Chlorine and ammonia are added after filtration to produce a chloramine residual in the finished water. Samples collected were the raw source water, water from the ozone contactor, and the finished product water collected at the entry point of the distribution system. Standard water quality parameters analyzed included total coliform bacteria, heterotrophic place count bacteria, total organic carbon (TOC), pH, turbidity, hardness, alkalinity, specific conductance, sulfate, nitrate and chloride. Biological stability of the water was determined by the assimilable organic carbon (AOC) bioassay using Pseudomonas fluorescens strain P-17 and Spirillum strain NOX, and by the coliform growth response (CGR) bioassay with Enterobacter cloacae and Escherichia coli as the bioassay organisms.
"EPA 600/D-90/228." Microfiche.