• AWWA JAW26104
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AWWA JAW26104

  • Journal AWWA - Effects of Preoxidation With Ozone on Water Quality: A Case Study
  • Journal Article by American Water Works Association, 06/01/1989
  • Publisher: AWWA

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An integrated pilot- and full-scale study was conducted to evaluate the effects of ozone on water quality in several different treatment schemes. It appeared that low dosages of ozone (0.75 mg/L) increased levels of total organic carbon, but the effect leveled off at higher ozone concentrations (1.5 mg/L). Ultraviolet absorbance, however, was observed to decrease with increasing ozone dosage. No correlation was found between ozone dosage and turbidity reduction. Although the reduction in trihalomethane formation potential (THMFP) generally increased immediately after single-stage application of ozone, overall THMFP reduction for two-stage ozonation was shown to decrease with ozone concentration for several phases of experimentation, especially when softening followed ozonation or when chlorination was conducted at high pH levels. Includes 16 references, tables, figures.

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