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

  • Exceptional separation efficiency of up to 75 micron
  • Compact design and 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 a dual-chamber configurationthat combines an aerated and an unaerated grit trap chamber.

Applications:

  • New wastewater treatment plants
  • Retrofit of Aerated Grit Chambers
  • Pre-treatment for membrane bioreactors (MBRs)
HUBER Grit Trap GritWolf®
HUBER Grit Trap GritWolf®
HUBER Grit Trap GritWolf® prior to HUBER Grit Washers RoSF4
HUBER Grit Trap GritWolf® prior to HUBER Grit Washers RoSF4
GritWolf® lamella units for concrete tank installation
GritWolf® lamella units for concrete tank installation
Installed lamella units in a concrete tank
Installed lamella units in a concrete tank
HUBER Grit Trap GritWolf®, concrete version for 300 l/s
HUBER Grit Trap GritWolf®, concrete version for 300 l/s
Separation of floating material in the HUBER Grit Trap GritWolf®
Separation of floating material in the HUBER Grit Trap GritWolf®
Grit retained on the lamellae
Separated grit on the lamellas
HUBER Grit Trap GritWolf® as retrofit before commissioning
HUBER Grit Trap GritWolf® as retrofit before commissioning
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Design sketch: HUBER Grit Trap GritWolf®
Design sketch: HUBER Grit Trap GritWolf®

Design and Function

Design sketch: HUBER Grit Trap GritWolf®
Design sketch: HUBER Grit Trap GritWolf®

In the first, smaller chamber of the HUBER Grit Trap GritWolf®, wastewater undergoes medium-bubble aeration, causing floatable particles to rise to the surface where they accumulate. These particles are then removed by a paddle system just before the outlet. The second chamber is unaerated and features lamella units. Thanks to the deep flow design and the benefits of the lamella separator, the GritWolf® efficiently removes even the finest grit particles.

The grit trap tank is typically constructed from concrete, although stainless steel tanks are available as an option for smaller plant sizes. The GritWolf® can also be seamlessly integrated into existing grit trap chambers. Both the horizontal grit conveyor, the lamella packages, and the paddle system for grease removal are made from corrosion-resistant materials for long-lasting performance.

The grit is extracted axially from the HUBER Grit Trap GritWolf® using a time-controlled horizontal screw conveyor. This ensures that even large accumulations of grit, such as "sand dunes" formed during stormwater flushes, are evenly fed into the suction area of a grit pump. The grit pump then transports the grit-water mixture to the HUBER Coanda Grit Washer RoSF4, where it undergoes a proven cleaning process to produce high-quality, clean grit, completing the entire grit treatment system.

Benefits of the HUBER Grit Trap GritWolf®

  • High separation efficiency with 95% separation of particles ≥ 75 micron
  • Compact and space-saving design with small footprint
  • Efficient grit handling with horizontal screw conveyor ensuring a controlled and regulated supply of grit to the grit pump
  • Low pressure loss with minimal energy consumption
  • Integrated floating material separation with an optional automatic forced removal system
  • Reduced organic content, achieves a loss on ignition < 3% with downstream grit washing

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More information needed?

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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

HUBER Solutions in Operation

img-casestudy-20-03-gritwolf-texas-test-01
03/23/2020 South Padre Island, TX, USA

Targeting the fine sand: Grit Trap GritWolf® passes first endurance test in Texas

HUBER Grit Trap GritWolf® proves its efficiency in the separation of fine sand down to a grain size of 75 µm in a test...

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img-caysestudy-18-03-neuer-gritwolf-01-skizze
03/19/2018

New HUBER Grit Trap GritWolf® setting new standards: Grit removal below 100 µm

Fine grit of a grain size ≥ 75 µm can usually not be separated by conventional aerated longitudinal grit traps - The new...

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