Sustainable Manufacturing

Beneficial Use of Residuals

The increased difficulty and costs associated with permitting, constructing and operating new landfills has caused many in the industry to focus their attention on reducing waste streams and extending the life of their current landfills. This, in turn, has generated new interest in concepts such as the “Circular Economy” and “Zero Waste” and might affect decision‐making in terms of managing solid residuals. Maintaining technical knowledge on current advances related to beneficial use of forest industry manufacturing residuals will help industry address marketplace expectations. In this context, NCASI’s objectives in this focus area are to identify and characterize the environmental benefits related to circular and/or enhanced use of manufacturing residuals from the forest sector.

Beneficial Use of Residuals

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Residual Types & Uses

As part of the manufacturing process, the forest products industry generates several types of solid residuals such as boiler ash, causticizing residuals, woody biomass, secondary fiber rejects, and wastewater treatment solids. Due to their chemical and physical properties, these residuals have many beneficial uses as substitutes for raw materials in other manufacturing, geotechnical, agricultural, and silvicultural applications.

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Landfilling

Manufacturing residuals that are not beneficially used are typically classified as solid wastes and disposed of in a landfill.

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