Storage and Extraction Silo

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Aquasystems International N.V. SFA enviro

Halle, Belgium

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The Enviromulti storage and extraction silo is designed for difficult products such as sewage sludge.
Enviromulti extractors consisting of several screws form a moving bed at the bottom of the tank. Thanks to the rotational movement, but also by the variation of the pitches and directions of rotation given to each of the screws, the sludge collapses in the threads and is directed towards the discharge box.
The management of rotational speeds by variable speed drive associated with the partial or total use of the screws makes possible the regulation of the extraction flow rate. Multi-screw technology is also used for the recovery of sludge under a filter press (Enviroduo).
LAYOUTS of Storage and Extraction Silo

Crinoline ladder
Extractor Multispir MTX
Silo
Covers
Guard rails
Motorizations

TROUGH
For shaftless screws, the troughs are U-shaped and serve as a guide. For screws with an axis, a flat bottom trough solution is generally used.
DISCHARGE
The shape of the discharge case is modular according to the configuration of the implantation and according to the equipment chosen further for the transfer of the sludge. This version is also used for the recovery of sludge under filter press (Enviroduo).
SCREW
The shaftless screws are laying on HDPE lining and are guided by the shape of the trough which keeps them in their axis. This is generally the solution chosen for screw extractors. The screws with the axis are guided by bearings at the ends and intermediate bearings according to their len
MATERIALS of Storage and Extraction Silo