Alfa Laval ALDEC decanter centrifuges are designed for the sludge thickening and dewatering process in municipal and industrial wastewater treatment plants, with a focus on cost-efficiency, reliability, easy operation and sustainability.

Sludge decanter centrifuge design provides a series of concrete benefits

  • Reduces sludge volume, which cuts down on transport and disposal costs
  • High capacity at small footprint: Compact, modular design saves space
  • High performance combined with low energy consumption
  • Wear-resistant design with anti-blocking feature.
  • Complete, fully enclosed cleaning-in-place (CIP)

The extensive range of ALDEC sludge centrifuges are capable of handling a wide range of flow rates. They are designed to be efficient, simple to install, easy to maintain and straightforward to operate. Installation, operating and service life costs are minimal.

Alfa Laval MBR low total cost of ownership

Less water, lower cost

Cost-effective sludge decanter centrifuges are crucial for removing the water content from sludge from wastewater plants, as well as from industrial waste streams. The drier the sludge, the less space it takes up and the less it weighs – both resulting in big savings on transport and disposal costs, whilst helping to meet sustainability requirement.  

Low energy consumption and labour costs

With ALDEC decanter centrifuges, you benefit from low energy consumption as well as a minimum of maintenance costs, keeping dewatering costs to a minimum. They are also fully automatic, so you can keep labour costs down.

How it works

ALDEC decanter centrifuges separate the liquid components from a stream of sludge in a rotating horizontal cylinder (the bowl) fitted with a screw conveyor inside. The feed enters the bowl through a stationary inlet tube and is accelerated smoothly by an inlet rotor. This gives rise to a centrifugal force that makes the separated-out solids collect on the wall of the bowl.

The conveyor and the bowl rotate in the same direction, but at different speeds. This has the effect of moving the solids towards the conical end of the bowl, where they can be removed. The liquid components in the sludge leave the bowl by flowing over adjustable plate dams into the casing.

This technology – in which Alfa Laval is the world leader – results in exceptionally effective dewatering, with the driest possible cake.

Performance audit for Decanter Centrifuges

Get decanter centrifuge optimization and cost-savings with Alfa Laval Performance Audit as our global service and support experts help make the most out of your equipment.

Minimize operating cost with Alfa Laval IoT Services

Alfa Laval’s IoT Services is a range of digital services aiming to reduce operating costs and maximize operating reliability in wastewater plants.

Aldec G3

ALDEC decanter centrifuges are available with capacities ranging from 2 to 95 m3/h. For higher capacity and more advanced requirement, Aldec G3 is your ideal solution.


Solutions for the Circular Economy

More and more wastewater treatment plants are discovering the benefits of a circular, holistic approach to wastewater treatment. Cost savings, reduced environmental impact and new income streams from recovered resources are but a few. Every wastewater treatment plant is unique and has its own set of challenges and opportunities. With our expertise in processing and our broad range of products, we can support your shift to a circular resource flow. Regardless of whether you are a contractor, designer or plant operator we can help you find the optimum solution for your specific project.


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