Removal efficiency of COD by the ozone plus bioactive carbon process
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Hello everyone. For refinery wastewater, the COD level in the effluent from an aerated biological filter is 40, and the ammonia nitrogen level is 2. If the ozone plus bioactivated carbon treatment process is used, what will be the COD level in the effluent, and what will be the turbidity level?
COD is 40, ammonia nitrogen is 2; with such low COD levels, the effect of adding ozone is not significant
The ozone pre-oxidation combined with BAC process is adopted, following the process design used by Veolia at the Zhoujiadu Water Plant in Pudong. The ozone dosage is approximately 1.5 mg/l, with a residence time of 10 minutes. This process is widely used in water treatment plants, but less so in sewage treatment plants; its efficiency in removing high COD levels is difficult to determine. This process is intended to be used as a pretreatment for the reuse of water from oil refining wastewater.
Thank you for sharing; I’ve learned something from it{:2_36:} I haven’t had much exposure to wastewater issues so far