Dynamic Leaching Studies on Pulpwood Bark Results

by Arthur H. Benedict, (A.M.ASCE), Asst. Prof.; Dept. of Civ. Engrg., Univ. of British Columbia, Vancouver, B.C., Canada,
James J. McKeown, Regional Engr.; Northeast Regional Ctr., Natl. Council of Paper Industry for Air and Stream Improvement, Inc., Tufts Univ., Medford, MA,
Russell D. Hart, Sanitary Engr.; Anderson-Nichols and Co., Inc., Consulting Engrs., Concord, NH,

Serial Information: Journal of the Environmental Engineering Division, 1974, Vol. 100, Issue 4, Pg. 869-882

Document Type: Journal Paper


Recent years have witnessed a growing concern by the pulp industry over the effect of bark disposal operations on receiving water quality. In these circumstances the National Council of the Paper Industry for Air and Stream Improvement, Inc., undertook a laboratory study to define the quantities of BOD5, COD, and color leached from fresh and field-aged pulpwood bark residues under several experimental conditions. Barks from northeastern species were used in all investigations. The results showed that the quantity of BOD5, COD, and color leached from bark residues under dynamic leaching conditions depends on the field storage age of the bark, and on the conditions under which leaching occurs. Working curves for estimating BOD5, COD, and color contributions from northeastern pulpwood bark residues are presented.

Subject Headings: Oxygen demand | Leaching | Industries | Water quality | Laboratory tests | Rivers and streams | Curvature

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