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    Author(s): J.Y. Zhu; C. Tim Scott; Roland GleisnerDoreen Mann; D.P. Dykstra; G. Holton Quinn; Louis L. Edwards
    Date: 2007
    Source: Bioresources. Vol. 2, no. 4 (2007): Pages 544-559
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (611 KB)


    High-value, large-volume utilization of forest thinning materials from U.S. National Forests is a potentially important contributor to sustainable forest health. This study demonstrated the utilization of wood chips produced from thinnings for the production of thermomechanical pulp (TMP). Both whole-log chips (primarily from small-diameter logs, tops, and reject logs) and sawmill “residue” chips from a Hewsaw system (Mäntyharju, Finland) were evaluated. The residue chips produced in this study were substituted for a TMP mill’s standard residue chips up to about 50%. The whole-log chips were substituted for the mill’s whole-log chips up to about 30%. The results show that substitution of chips produced from forest thinnings reduced refining energy in all trials. Pulp quality was maintained throughout all trials.

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    Zhu, J.Y.; Scott, C. Tim; Gleisner, Roland; Mann, Doreen; Dykstra, D.P.; Quinn, G. Holton; Edwards, Louis L. 2007. Mill demonstration of TMP production from forest thinnings : pulp quality, refining energy, and handsheet properties. Bioresources. 2(4): 544-559.


    Paper industry, energy conservation, wood-pulp industry, pulping, wood pulp, mechanical properties, wood chips, Douglas fir, smallwood, lodgepole pine, tensile strength, suppressed growth, chips, thermomechanical pulping, thinnings, small-diameter timber, small timbers, forest thinning, small diameter trees, suppressed growth trees, forest fires, sawmill residues, pulp quality, sheet properties

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