1. Effect of ozonation on treated municipal wastewater
- Author
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Jarmo Sallanko and Jarkko Okkonen
- Subjects
Biochemical oxygen demand ,Post precipitation ,Environmental Engineering ,Ozone ,Chemistry ,Chemical oxygen demand ,food and beverages ,General Medicine ,chemistry.chemical_compound ,Wastewater ,Environmental chemistry ,Water Pollutants ,Sewage treatment ,Turbidity ,Effluent ,Environmental Restoration and Remediation - Abstract
In this study, the effects of ozonation on municipal treated wastewater were investigated. Batch experiments were conducted using two water samples from the same plant: post precipitation plant effluent and the same effluent after a polishing treatment in a wetland. The effects of ozonation on chemical oxygen demand (COD), biological oxygen demand (BOD(7)), colour and turbidity were investigated. Ozonation with dosages up to 2.7 mg/L substantially decreased the COD of biochemically treated municipal wastewater. One gram of ozone decreased the amount of COD by 1.5 g. With higher dosages, the effectiveness of ozone on COD decreased rapidly. Ozone was a very effective colour and turbidity reducer.
- Published
- 2009