The cavitation effect of ultrasound wave can be used to demulsify the scum pro-duced in the sewage treatment plant of refining and chemical enterprises.Then three-phase separation of water,oil and mud can be achieved by further centrifugal separation.By use of the complete skid-mounted equipment based on ultrasonic demulsification and centrifugal separa-tion technology,the objectives of resource utilization,reduction,harmlessness of the scum and bottom mud in sewage treatment plant are finally realized.The delivery amount of hazardous waste is reduced and the cost of hazardous waste disposal is saved.The advantage and reliability of the technology and complete skid-mounted equipment is proved by successful operation in the Water Supply and Drainage Plant of SINOPEC Qilu Branch Company,which possesses a good prospect of application and extension.
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