Abstract
We have developed a new technique that utilized ozonation under an acid condition, for treating dairy wastewater containing milk. The distinguished mechanism of this treatment is that the pollutants in the wastewater were solidified in a short period and that the wastewater quality was rapidly improved. In this condition, the energy consumption per unit mass of the removed pollutant was small, and the energy efficiency of this technique was higher than that of an advanced oxidation process or flotation technique. The ozone-bubble behavior in the wastewater was different from that in clean water. In the wastewater, the ozone-bubbles did not coalesce with each other, and the bubble velocity decreased. Hence, the change of the bubble behavior in wastewater af fected the solidification of pollutant and the recovery efficiency.
