The Smart Dewatering Solution for Paper Pulp Rejects

Royal Dutch Kusters Engineering - Organic Liquefying Press
Depending on the process of a paper mill, the paper rejects make up around 5 to 25% of the paper. These rejects include materials such as plastics and fibers that are separated from the wet paper pulp. Because of its high calorific value yet high moisture levels, one of the main challenges for this fraction is to optimize the drying process. Moisture increases weight and creates unnecesary costs in areas such as transport and gate fees. Additionally, more moisture means less constant incineration requiring additional heating. The OLP optimises the drying process of these solids and eliminates the need for multiple drying steps in your process.


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Benefits of dewatering with the OLP

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40-50% weight reduction in one step

The OLP brings unmatched resource extraction. Initial results suggest that the weight could potentially be lower by 50% in a single cycle.
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Works with a wide range of input material

 There are almost no restrictions to input material and the OLP can handle various types of paper pulp rejects without any problems.

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Open architecture and predictive maintenance

The cylinder press uses a ram with a force of 137 tons. That is strong enough to crack the cell walls of the organic material, speeding up the digesting process.
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Reuse the water in your production process

The OLP captures all moisture retrieved by the dewatering process so that it can be reused in your paper production process. This way it further optimizes cost effectiveness.

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High pressure extraction

The cylinder press uses a ram with a force of 137 ton. With over 100 kilograms of pressure per cm2, the OLP gives you the right pressure solution for various types of material
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One step solution

The OLP forms a single step solution to the paper pulp reject drying process. With significant drying capabilities, overhead costs can be reduced.

How to achieve unmatched dewatering

To extract the liquid fraction the material is pressed through a sieve by means of hydraulic pressure. The two resulting fractions are the dry RDF and liquid fraction with a high level of purity. The self-learning press automatically adjusts its settings for optimal output and energy usage. The OLP can lower the weight of rejects by more than 50%.

Royal Dutch Kusters Engineering - Organic Liquefying Press (OLP) front

Organic Liquefying Press

  • Significantly reduce moisture and weight of material
  • Little limitations to input material
  • Predictive maintenance and low wear and tear
  • Reuse water in your production process
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Process steps

dewatering paper pulp rejects process

But how will it work with my waste stream?

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Read more on Dewatering Paper Pulp Rejects

Optimise the Dewatering of Paper Pulp Rejects

Besides some fibres, these rejects include a large amount of non-recyclable plastics that are separated from the wet paper pulp. These are extremely suitable to be used as alternative energy.

Why optimal plastic waste recycling should include segregating and recycling of moisture

Landfills are overflowing, illegal dumping is increasing and gigantic plastic soups are drifting in our oceans. About time we really start recycling our plastic waste. Let’s take a further look at the valuable materials plastic waste contains and how we can separate and reuse those efficiently.