Reject Handling

The dewatering of rejects to highest dry contents represents a fundamental process for the paper industry from an economic as well as ecological point of view. Especially in waste paper preparation plants but also in mechanical and chemical pulp mills. With maximum dry contents, we minimize volume and weight. Hence we meet the customer demands such as the reduction of transport and landfill charges. Furthermore, high calorific value to achieve constant and ecological incineration without additional heating.

Most modern paper mills that are our customers for complete systems produce residue derived fuel (RDF) from their rejects. Generally, the treatment of rejects from waste paper processing plants is integrated into the paper mill. The same processes may, however, be used by specialized waste disposal companies. Separating valuable constituents such as metals and impurities is of importance.

We chose the reject treatment equipment according to the pulper system, the sorting steps and the intended destination of individual reject streams.


  • Adjustment to customer requirements
  • Maximum dryness = high calorific value = maximum economic performance
  • High capacity of up to 250 BDTPD of reject
  • Defined particle size (where required)
  • A defined level of Fe and non-ferrous contamination
  • Storage and transportation of RDF

Rejects from chemical and mechanical pulp mills

Bellmer thickens rejects from chemical and mechanical pulp production, such as knots, shives, and fibre bunches  are thickened by our thickener AKSE F. In a downstream stage, our AKUPRESS AS/AX screw press dewaters the rejects further in order to reach maximum possible dry contents. Both the thickener and the screw press are always tailored to the individual operating conditions and adapted to the materials used. Thus, they comply with the current regulations regarding occupational safety and emission protection.

Get more information

Our specialists are looking forward to taking on your new reject project. Learn more about our know-how and experience in the field of reject preparation process.
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