Azo dyes such as Congo red can easily cause cancer when they come into contact or are absorbed by the human body. so it is urgent to find a fast and simple method for degrading Congo red. In order to better achieve this research goal. an ultrasonic method was used to degrade Congo red solution in a rotating flow field. https://www.roneverhart.com/Pica-Limon-Salt-Lemon-Spicy-Powder-Packs-100-Piece-Bag/