Operating principle

The sewage flows through the inlet pipe into the supply box/distributor and from there into one of the two solids separation tanks. The solids separation tanks align upstream with the discharge ports of the sewage pumps and filter out large solids.

In this procedure, only “pre-treated sewage” goes through the standby sewage pump into the shared collection tank. When the water level in the collection tank comes to the switch-on level, the related sewage pump is switched on by the level control device. WARNING! The sewage pumps run alternately. Parallel operation is not permitted.

The flow from the working sewage pump opens the separation system of the solids separation tank, and pumps all the solids kept in the solids separation tank into the discharge pipe.

The inlet of the affected solids separation tank is closed with a shut-off ball during this procedure.