Grit Removal

Highly efficient degritter systems.

Their versatility allows them to be used successfully in waste, storm and potable water applications.

John Meunier MECTAN® Classic Grit Chamber

The Classic (270) type Induced Vortex Grit Chamber takes full advantage of the tangential inflow velocity along the periphery of the chamber to initiate the grit removal process. The circular design uses only a fraction of the footprint of conventional aerated degritters. The reliable system operates efficiently over a wide range of daily flow rates with low head loss. The sloped transition along with the rotating motion eliminates accumulation of grit in the separation chamber under all conditions and maintains grit removal performances even during a power failure.

Flow rating

Up to 78 MGD / 295 MLD

Degritter Diameter Size

24 feet / 7.3 m

Installation

Suitable for concrete or metallic tank

Extraction type

Air lift pump or motorized pump

Available Configuration : (Inlet vs Outlet)

270 degrees
Extraction Mode Batch mode recommended

John Meunier MECTAN V® Variangle Grit Chamber

The Variangle type induced vortex grit removal unit is an innovative re-engineering of the Classic Mectan technology. The concept capitalizes on the classic tank shape to enhance the effective conical transition between chamber sections to obtain a dynamic and revolutionary configuration. The use of a separation disc ensures process stability and reliability at any flow rate with a 20% overall increase in grit removal efficiency, mainly in fine particles. With its multi-directional outlet channel positioning capability, the Variangle unit provides waste water treatment plant design flexibility.

Flow Rating

Up to 78 MGD / 295 MLD

Degritter Diameter Size

24 feet / 7.3 m

Installation

Suitable for concrete or metallic tank

Extraction Type

Air lift pump or motorized pump

Available Configuration : (Inlet vs Outlet)

0 to 360 degrees
Extraction Mode Batch mode recommended

John Meunier SAM® Type GDS Grit Dewatering Screw

The concept is based on the use of an inclined spiral inserted into a specially shaped trough to separate the grit from a grit/water mixture. The mixture is fed to the inlet hopper where grit classification and settling is achieved. The excess water overflows back to the influent channel. The slow rotation of the screw causes the grit to dewater as it moves toward the discharge point. The unit is supplied with an air separator or cyclone separator according to the feed mean used. This pre-assembled unit can eliminate problems associated with foul odour and unsanitary handling

Operation Type

Batch mode recommended

Feed Accepted

Pumped or by gravity

Model Size

10 or 14 inches / 230 or 350 mm

Conveyance

16 or 18 feet / 5 or 5.5 m

Setting

25 degrees
Support type (Screw) Replaceable wear components

John Meunier SAM® Type GFW Grit Washer

The concept uses a conical hopper set on top of an inclined shaftless spiral inserted into a tube to separate, wash and dewater the grit from a grit/water mixture. The mixture is fed to the inlet hopper where a slow rotational movement is induced to achieve grit particles settling. The combination of wash water injection and the central stirring motion provides grit scouring. The excess water and organic matter overflow back to the influent channel. The rotation of the screw at determined intervals causes the grit to dewater as it moves toward the discharge point. It could supplied with an air separator or cyclone separator according to the feed mean used. This pre-assembled unit can eliminate problems associated with foul odour and unsanitary handling.

Operation Type

Batch mode recommended

Feed Accepted

Pumped or by gravity

Model Size

10 or 12 inches / 250 or 300 mm

Conveyance

16 or 18 feet / 5 or 5.5 m

Setting

35 degrees
Support type (Screw) Replaceable wear components
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