VecFlow™ Technology: Optimize your wastewater sludge dewatering and sludge thickening

The new Alfa Laval ALDEC G3 VecFlow™ decanter centrifuge offers unmatched efficiency for dewatering and thickening of wastewater sludge. The unique VecFlow™ feed zone minimizes turbulence, resulting in exceptional separation and 30% lower power consumption compared to traditional decanters. The combination of outstanding separation performance and operating flexibility lets you cut costs by optimizing your dewatering processes in terms of cake dryness, polymer consumption or throughput.

ALDEC G3 VecFlow™ sludge decanter centrifuge

Optimize your wastewater sludge thickening and dewatering


ALDEC G3 VecFlow™ decanter centrifuge for sludge dewatering gives you maximum performance, with minimal turbulence. Low turbulence in the decanter bowl is essential for high separation performance and low power consumption. Alfa Laval’s unique VecFlow™ feed zone reduces turbulence by more than 80% compared to traditional decanter centrifuges and cuts acceleration power by 40-50%.

Gentle acceleration

A traditional feed zone injects the sludge radially into the decanter bowl, thereby continuously disturbing the internal flows and causing turbulence. A VecFlow™ feed zone, on the other hand, gives the feed a completely different flow path since it accelerates the sludge tangentially when entering the bowl.

Sludge centrifuges with better separation performance

Apart from a reduction in total power consumption in sludge dewatering and thickening, the low turbulence also improves separation performance in thickening. The separation is more effective than in a traditional decanter, with less break-up of flocculants, and the minimal turbulence in the sludge decanter centrifuge also reduces wear on the conveyor.



Depending on your specific sludge-thickening requirements, you may wish to minimize polymer consumption, increase the dryness of the cake or boost capacity.

The high separation performance in thickening and low power consumption leads to a low total cost of ownership and very short payback times. You often get a full return on your investment in less than one year.


At the forefront of sludge dewatering technology

ALDEC G3 VecFlow™ is built on proven Alfa Laval technology and offers the same innovative features that have made the original ALDEC G3 the preferred choice for wastewater plants around the world:

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The PowerTubes liquid discharge recovers kinetic energy from the effluent. By directing the flow tangentially as it exits the decanter bowl, the decanter bowl is pushed in the direction of rotation, causing a significant reduction in energy consumption

Direct Drive gearbox

The conveyor is driven by a Direct Drive gearbox. This minimizes energy loss in the drivetrain as well as overall power consumption. It also ensures exact control over the conveyor speed and the separation process.

Decanter conveyor

Slimline conveyor

Sludge decanter centrifuges equipped with Alfa Laval’s Slimline conveyors have higher capacity and lower power consumption than traditional decanters. The slimmer conveyor increases the processing volume in the decanter, allowing for a deep pond. This means more sludge can be processed and that the pressure on the inside wall of the bowl is larger than in traditional decanters, which in turn results in dryer cake or higher capacity.

Customized to your needs

Alfa Laval G3 VecFlow™ is available with different conveyor designs, in various materials and with a range of wear protection options. It is therefore possible to optimize the performance and total cost of ownership according to your processing conditions and requirements.


Environmental sustainability with VecFlow™ Wastewater Sludge Decanter 

Alfa Laval ALDEC G3 VecFlow™ is an excellent tool for improving your plant’s environmental sustainability.

The lower power consumption leads to reduced CO2 emissions.

The high dry solids content reduces transportation requirements and landfill volumes, alternatively fuel consumption in incineration ovens.


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