HUBER Grit Trap GritWolf® HUBER Grit Trap GritWolf® with integrated lamella separator

Function

High separation efficiency of up to 75 μm
Small footprint
Integrated floating material separation
Ideal for high grit loads

The new HUBER Grit Trap GritWolf® is different from space-consuming aerated grit channels as it consists of an aerated and an unaerated grit trap chamber.

Applications:

New wastewater treatment plants
Grit trap refurbishment
Pre-treatment for membrane bioreactors (MBRs)

HUBER Grit Trap GritWolf®

HUBER Grit Trap GritWolf® prior to HUBER Grit Washers RoSF4

GritWolf® lamella units for concrete tank installation

Installed lamella units in a concrete tank

HUBER Grit Trap GritWolf®, concrete version for 300 l/s

Separation of floating material in the HUBER Grit Trap GritWolf®

Separated grit on the lamellas

HUBER Grit Trap GritWolf® as retrofit before commissioning

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Design sketch: HUBER Grit Trap GritWolf®

Design and Function

Design sketch: HUBER Grit Trap GritWolf®

In the first smaller chamber of the HUBER Grit Trap GritWolf® the wastewater is exposed to medium-bubble aeration. Floatable particles rise to the water surface where they accumulate and are removed by a paddle system just before the outlet. The second chamber is unaerated and equipped with lamella units. Due to the deep flow approach and the advantages of a lamella separator, the GritWolf® reliably removes even very fine grit.

The grit trap tank is usually made of concrete, stainless steel tanks are however available as an option for smaller plant sizes. The GritWolf® can also be integrated into existing grit trap chambers. The horizontal grit conveyor, the lamella packages and the paddle system for grease removal are manufactured from corrosion-resistant material.

The grit is removed axially from the HUBER Grit Trap GritWolf® by a time-controlled horizontal screw conveyor. Even large ‘sand dunes’ occurring under stormwater conditions (stormwater flushes) are therefore evenly dosed into the suction area of a grit pump. The grit pump delivers the grit-water mix into a HUBER Coanda Grit Washer RoSF4 that produces clean grit in a proven way, thus perfecting the entire grit treatment system.

Benefits of the HUBER Grit Trap GritWolf®

95% separation of particles size ≥ 75 μm
Small footprint and space-saving compact design
Low pressure loss

Regulated supply of grit to the grit pump by horizontal screw conveyor
Floating material separation with automatic forced removal (option)
< 3% loss on ignition with downstream grit washing

Media

Videos and Animations

Animation: HUBER Grit Trap GritWolf®

Function of the grit trap with integrated lamella separator - high separation efficiency on a small footprint

Downloads

Customer Information and Documents

Brochure: HUBER Grit Trap GritWolf®

More information needed?

Feel free to contact us

FAQ

Frequently Asked Questions

In addition to the desired sedimentation of grit, undesired separation of organic matter also occurs in the grit chamber. In order to prevent this separation of organic matter as far as possible, grit channels are designed with aeration to prevent the sedimentation of organic matter.

However, even aerated grit traps are unable to ensure reliable separation of grit from organics. This can only be achieved and guaranteed by a well performing grit washing plant, such as the HUBER Coanda Grit Washer RoSF4.

HUBER grit traps are usually dimensioned to have a grit separation efficiency of 95 % for a grain size ≥ 0.20 mm.

The HUBER Grit Trap GritWolf® is designed as a lamella grit trap and has a higher separation efficiency of 90% for grit particles ≥ 75 μm. This grit trap can also be used to separate fine and ultrafine sand ("sugar sand").

Case Studies