... 120COD, g/L1.41 .6 1.82.02.22.42 .6 0.00.20.40 .6 0.81.00 50 100 150 200Time (min)COD/CODoa = acid cycleb = basic cycleb (Simple ozonation)b-a-ba-b-ab-a-b-a-ba-b-a-b©2004 CRC Press ... 93Ozone wastewater Tomato wastewater, COD = 300 mgL–1, pH = 6. 5–7.8, 17–18ºC, 20 Lh–17 .66 × 10 6 b5.91 × 10 6 92Ozone wastewater Tomato wastewater, COD = 500 mgL–1, pH = 6. 5–7.8, ... et al., Two step wastewater treatment: Sequential ozonation-aerobic bio-degradation, Ozone Sci. Eng., 22, 61 7 63 6, 2000.47. Carini, D. et al., Ozonation as pre -treatment step for the biological...