Rotating drum filter for primary filtration

FTRSPIE

CATEGORIA ACQUA POTABILE
TIPOLOGIA FILTRI

WHEN TO USE IT

The rotating drum filter for primary filtration (or accelerated sedimentation) is generally used in the primary treatment processes of urban and/or industrial wastewater, in cases where it is necessary to intervene on existing plants, therefore with little space available, to obtain a strong removal of suspended solids and therefore of the polluting load of the effluent. In the same way, the FTRSPIE can be used in new projects to replace the primary sedimentation with the advantage of having a lower investment cost and being very compact.

HOW IT IS MADE

The filter consists of a sturdy cylinder on which the stainless steel filtering panels are mounted, a drum rotation system, a complete system for the washing of the filtering panels, a recovery system and partial drying and compaction of the primary sludge, pump, blower, pipes complete with valves, pneumatically operated valves, compressor serving the valves, command and control panel via PLC and related dedicated software.

HOW IT WORKS

The filtering drum is normally housed in a metal containment tank, completely closed, on request the type suitable for installation in concrete tanks can be supplied. During normal operation, the cylinder rotates and filtration takes place from the inside out. The filtering media used is a stainless steel mesh with a passage opening between 50 and 300 microns which retains suspended solids having a diameter equal to or greater than its passage opening; due to the progressive deposit of the retained solids on the mesh, after a few seconds the filter also begins to retain solids smaller than the filtration opening. The backwashing of the mesh, which takes place without interrupting the filtration process, is continuous and uses both water and air as a washing medium. The cleaning systems, positioned outside the drum, in a dry area, clean the filtering panels by detaching the primary sludge from the panel and directing them by gravity into a bottom hopper equipped with a draining screw. The sludge is extracted from the machine by the aforementioned screw and relative discharge pipe. All the filtration and backwashing phases are controlled by probes and sensors connected to a PLC equipped with a special SERECO software