The rotating drum type mechanical grid is made of grid sheets and made into a drum-shaped grid basket according to the grid gap. The water to be treated flows in from the front of the grid, filtered through the grid, and flows to the outlet of the pool. The grid slag is trapped on the grid surface. When the water level difference reaches a certain value, the rotary toothed rake installed on the central shaft will rotate to clean the dirt. When the slag-cleaning toothed rake collects the dirt to the top of the basket, it will start to unload the slag; then turn it back 15° , The slag cleaning tooth plate at the top of the basket automatically scrapes the slag adhering to the rake teeth and discharges it into the slag slot. The grid slag is lifted by the screw conveyor at the bottom of the trough, and is squeezed and dewatered in the upper pressing section and then discharged onto the conveyor belt or transported in and out of the garbage truck. The solid content of the filter residue after being squeezed and dehydrated can reach 25%-45%, which plays an important role in reducing outbound transportation costs and preventing secondary pollution.www.khnwatertreatment.com