Reject treatment systems
recycling-rejects-pulp-mill-waste
  • Recycling
  • Recycling products
  • Rejects from pulp and paper mills

Reject treatment systems

ANDRITZ systems for turning pulp and paper mill waste into value

Reject system based on drum pulping

Converting industrial waste into valuable resources and energy

Every recycled fiber line needs a proper water, sludge handling, and reject system in order to

operate economically. The goal is to minimize losses of process materials, recover and conserve resources (fiber, water, and energy), and minimize waste disposal.

In addition, many rejects can be valuable and even generate income for a mill: for example metals as raw materials and plastics as a source of energy. Rejects from recycled fiber processes are worthy of optimum and properly adapted treatment to extract their full value. The processes must be cost-efficient and simple, as well as fulfilling certain requirements to ensure that the rejects can become fuel (e.g. combusted), can be sold or re-used (e.g. pelletized), or can be disposed of at minimum cost and effort. This requires knowledgeable handling of the reject and a thorough knowledge of the individual process steps.

System based on conventional pulping

Typical paper mill, industrial waste sources

  • Pulper rags
  • Loose pulper rejects – containing mainly plastics, metals, stones, wood particles, etc.
  • Sand containing cleaner rejects
  • Light weight rejects from the coarse screening
  • Rejects (e.g. pins, screening rejects) from BCTMP and TMP plants
  • Bark and residuals from wood yard handling
  • Thinning wood and residual material from forestry

Benefits of reject treatment systems

  • Compliance with the legal requirements for protection of the environment, e.g. landfill directives
  • Reduction of disposal and transportation costs up to 30%
  • Pre-treatment of rejects for fuel generation
  • Reduction of greenhouse gas emissions (CO2) from 25% to over 40%
  • Additional income from recycling of raw material, e.g. metals or plastics

Pulper rags

Important source of raw materials in waste paper recycling.

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Sun Paper: Helping to save the planet

Sun Paper’s Honghe mill, based in Shandong Province, China, needed a tailor-made handling system to process rejects from two OCC production lines feeding its PM 31 and PM 32 paper machines. ANDRITZ successfully delivered one system in 2016 which has been quickly followed by a second.

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contact us
ANDRITZ AG
Austria
+43 (316) 6902
ANDRITZ MeWa
Germany
+49 7056 925 0
ANDRITZ AB
Sweden
+46 720 58 29 49
ANDRITZ (CHINA) LTD
China
+86 757 8202 7602
Downloads
  • ANDRITZ Recycling PDF : 2.3 MB
  • Waste to value

    Innovative technologies for sludge and reject handling, material separation and recovery, and production of renewable energy help you reduce dependency on purchased power or fossil fuels and eliminate landfilling of waste – thus improving your mill's profitability.

    PDF : 892 KB
  • Reject systems - drum pulping

    Reject systems for drum pulping from trash to treasure

    PDF : 890 KB
  • Reject systems - conventional pulping

    Reject systems for conventional pulping

    PDF : 744 KB
  • Pilot plant Graz

    Fiber preparation pilot plant, for customer trials, research and development

    PDF : 858 KB
  • Stora Enso - Ostroleka - SPECTRUM 27

    SPECTRUM

    PDF : 2 MB
  • Pulper rags - technical article

    ANDRITZ has developed a two-stage process for handling pulper rags that has already proven successful in many recycling plants.

    PDF : 1.2 MB