Multifunctional unit – MZ

MZ_II type is intended for treatment plants where separation of gravel and grit into one container and municipal screenings into another container is required. The operating principle of the unit is similar to that of the previous MZ_I type.

Wastewater flows from the side into the front part of the tank, where the inlet is suitably shaped to distribute it across the full width of the tank. As the wastewater flows through the tank, gravel and grit settle out. Wastewater free of heavy solids passes through the fine screen and flows out by gravity. Screenings captured on the screen are raked off and fall by gravity into the space behind the screen, where they are washed with service water. Captured heavy impurities (gravel and grit) are conveyed together by one screw conveyor to the first discharge point, from where they fall into a prepared container. Captured screenings are conveyed separately by a screw conveyor to the second discharge point, from where they fall into a prepared container or bin.

The screenings dewatering device is located on the casing (tube) of the screw conveyor. Here, the conveyed material is compressed. Released water drains through openings in the conveyor casing and along the inner side of the cover back into the unit. The cover of the dewatering section is equipped with nozzles that spray the internal space of the cover at programmed intervals and prevent clogging of the cover and return hose. The unit is equipped with an integrated fine-screen bypass which, in the event of a power outage or a fault on the fine screen, ensures the passage of flow through the unit. Grit and gravel capture is also ensured when flow passes through the integrated bypass. A sand washer is also integrated.