- 11 April 2007 -
Separation system prevents blockages
Pump expert Wilo has developed a new solids separation system for its EMUPORT sewage pump installations.
Currently, moist and moisturised cellulose tissues are amongst the most problematic items in municipal sewage disposal situations, Wilo says. When this material gets into a pump, the hydraulics can be often badly affected and it can lead to the pump blocking, resulting in expensive maintenance at the pumping stations. If the primary pump becomes blocked, the standby pump can also break down for the same reason.
Wilo's solids separation system works by ensuring that this material does not come into contact with the pumps during the pumping process. The system incorporates a solids separation reservoir through which all incoming sewage flows on its way into a collection reservoir. During the filling process, the pump remains switched off. The incoming sewage flows into the solids separation reservoir first and the solids are held back by separating flaps, with only the liquid sewage flowing through the switched off pump to reach the collection reservoir. When the water reaches a certain level in the two reservoirs, a shut off ball valve automatically closes the intake. At this stage, the filling process turns into a pumping process, in the opposite direction to the flow into the reservoir. The liquid sewage is pumped out of the collection reservoir through the solids separation reservoir and by so doing opens the separation flaps with the power of the flow.
Wilo also provides dual pump stations using this system. In these units, the pumps can be used alternately and a separate solids separation reservoir is assigned to each pump.
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