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Smaller, low-tech ALDEC decanter centrifuges are ideal for loads of smaller wastewater treatment facilities looking for reliable, low-cost sludge dewatering.

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Less water, lower cost

Cost-effective 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.

Choose the best solution

Conventional, ultra-reliable ALDEC decanter centrifuges are ideal for sludge dewatering in all kinds of wastewater treatment facilities. They are the ideal low-tech complement to the larger-capacity, more advanced ALDEC G3 units.

Big benefits

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.

ALDEC decanter centrifuges are available with capacities ranging from 2 to 95 m3/h.

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.
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