Abstract
The treatment of transformer oil wastewater in the accident oil pond with ozone has no secondary pollution to the environment. The cavitation technique was used to enhance the oxygenation process and hydrocyclone separator to do the pretreatment. After transformer oil sewage enters the hydrocyclone, the separation efficiency reached up to 60%, which reduces the processing load of subsequent cavitation device. Through 10min cycle treatment of ozone in a cavitation device, the oil concentration of the imported wastewater was reduced from 50mg/L to below 5 mg/L, which has reached the Class-I discharge standard of industrial water. The optimal operation parameters of cavitation were studied by adjusting the inlet pipe gap and gas-liquid ratio of cavitation.
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