water decanters | Alfa Laval

A complete range of decanters for wastewater treatment

We offer a complete range of decanter centrifuges for wastewater treatment, sludge thickening and dewatering. Regardless of your demands or challenges, we have the right machine for you.

10 χρήσιμες συμβουλές για τη μείωση του κόστους συντήρησης εγκαταστάσεων λυμάτων

Dewatering centrifuges innovating the wastewater industry

When partnering with Alfa Laval, you have full access to our application experts who can advise you on how to optimize your operations. And with the backing of our extensive service network, you always get quick assistance whenever you need it.

Alfa Laval has been leading the wastewater decanter market for decades. With a strong focus on operational reliability, separation performance and high customer value, we continue to innovate the business.




Alfa Laval ALDEC decanters bring high separation efficiency, reliable operation and low operating costs to all types of water and wastewater treatment plants. ALDEC is Alfa Laval’s medium range of decanters for wastewater treatment, comprised of a wide variety of sizes. Low power and polymer consumption in combination with easy service makes ALDEC very attractive in terms of total cost of ownership.

ALDEC is available with capacities from 3 to 125 m3/h.


Decanter for wastewater - benefits

  • High separation performance
  • Low power consumption
  • Highly reliable operation
  • Upgradable to G3 or G3 VecFlow™
  • Replaceable wear protection tiles
  • PowerTubes
  • Easy to service


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The Alfa Laval ALDEC G3 features the same technology as ALDEC G3 VecFlow™, except for the feed zone. ALDEC G3 has a standard feed zone, giving it somewhat lower performance and higher power consumption. It is a good fit for a wide range of applications where high separation performance and low power consumption are required, but where the extra benefits offered by VecFlow™ are not necessary. An Alfa Laval ALDEC G3 can be upgraded to the VecFlow™ design.

ALDEC G3 is available with capacities from 23 to 225 m3/h.


Decanter for wastewater - benefits

  • Ideal for demanding sludges with high solids loading
  • High separation performance, 1% drier solids compared to standard decanters
  • Low power consumption
  • Upgradeable to G3 VecFlow™ PowerTubes, Slimline conveyor and Direct Drive gearbox
  • Replaceable wear protection tiles
  • Advanced control system Easy to service
  • Available in many materials, including Duplex


  • Larger footprint than i-DW

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PowerTubes Optional X
Wear protection coating on conveyor    
Wear protection tiles on conveyor X X
Wear protected inlet   X
Slimline Design   X
Direct Drive gearbox   X


PowerTubes X Included
Different gear boxes X X
Bowl available in Duplex X X
Conveyor available in 316 X X
Conveyor available in Duplex   X



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Extend your decanter’s lifetime value with Alfa Laval Service

Alfa Laval’s comprehensive service offering can assist you in your decanter centrifuge optimization as your operations develop and change over time. As part of the service offering you find both decanter centrifuge optimisation, troubleshooting and training, and more. Ensure outstanding performance from your Alfa Laval decanter and minimal total cost of ownership.

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