Treatment device for degradation-resistant waste water and waste water treatment method thereof

The invention provides a treatment device for degradation-resistant waste water and a waste water treatment method thereof, and belongs to the technical field of sewage treatment. The treatment device is characterized by comprising a pH (potential of hydrogen) adjusting tank (1), an ultrasonic reactor (3), a catalytic reaction tank (4) and a sedimentation tank (5) which are sequentially connected in series, wherein the ultrasonic reactor (3) is a single-frequency emission tube-type ultrasonic reactor, and the inner wall of the ultrasonic reactor (3) is corrugated. The device is used for achieving ultrasonic synergistic Fenton oxidization of the degradation-resistant waste water, and a Fenton reagent is added before ultrasonic treatment and then enters the ultrasonic reactor (3) to have a synergistic oxidization reaction. The corrugated inner wall of the single-frequency emission tube-type ultrasonic reactor (3) enables ultrasonic waves to be reflected and focused for multiple times, and accordingly, the multiple superposition of energy is achieved. The device and the method enable the reaction time of the ultrasonic waves to be short, the energy consumption is low, the reaction efficiency is improved, the amount of agents used for the method is reduced, the energy consumption of ultrasonic waves is low, and the device and the method can be conveniently used in industry.