Drum Microscreen Wastewater Filter

To achieve a better clarity of discharge wastewater, a Microscreen Filter can be used to further remove and trap a large portion of suspended solids coming out from the secondary treatment system especially sedimentation tanks. It is a type of filtration device that uses a low-speed rotating drum with a prefixed screening cloth attached onto the surface.

A typical microscreen filter is usually capable of removing foreign particle size ranging between 25 to 30 microns and as the wastewater is continuously fed into the device, the collected materials trapped onto the screen must be removed by a backwashing procedure in order for it to operate optimally. Depending on the pore size of the screen, certain stainless steel or polyester cloth type can even remove up to 20-micron size of suspended solids. Usually a typical design of a microscreen filter has a high-pressure jet system that functions to auto-backwash once the panel gets blocked off and the cleared out trapped solids will be collected into a trough located inside the drum itself and then drained out.

A microscreen filter is a cost effective method selected for use in wastewater treatment facilities because it does not clog up easily and it is also capable of treating huge amount of incoming influent. Normally the design of the drum diameter is around 3 meters and with that, efficiency on the removal of solids can be as high as 70 percent. However, since it is a crude method that does not ensure complete removal, the system will usually have problems when there is a sudden increase of incoming wastewater flow with high saturation of solids. Other filtration device in wastewater plant: Trickling Filter System and Granular Media Filters

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