Dissolved air flotation machine for sewage treatment

Belonging to the technical field of sewage treatment equipment, the invention discloses a dissolved air flotation machine for sewage treatment, which comprises a machine body, and a water inlet, a dosing port, a slag discharge port and a drain outlet all arranged on the machine body. The dissolved air tank is arranged at the bottom end in the machine body, an air outlet of the dissolved air tank is connected with a release mechanism, and the dissolved air tank is used for releasing air to form microbubbles and treating sewage; according to the sewage treatment device, the micro bubbles released by the release mechanism are fully mixed with the sewage, the release mechanism is provided with bent pipes at the upper ends of multiple groups of pipelines and through pipes, so that gas is discharged from the through pipes to form the micro bubbles, gas outlets are uniformly distributed, and the sewage treatment effect is improved. The combination efficiency of the tiny bubbles and the sewage is improved, so that th