ALL: In addition to this potential I wonder what might be the potential application in the Paper & Pulp industry.
__________________________________________________________________
ebuild.com
Roughly 17% of all softwood lumber is pressure-treated today--about 40% of all softwood from the Southeast. The majority is treated using
chromated copper arsenate (CCA),an inorganic, waterborne preservative.
In 1995, according to the American Wood Preservers Institute, 138
million pounds (63 million kg) of CCA were used in the United States to treat roughly 5.1 billion board feet (12 million m3) of lumber, timbers, and other wood products. Another 8.7 million pounds (3.9 million kg) of other waterborne preservatives were used in 1995. Since 1985, approximately 48 billion board feet (113 million m3) of wood products have been treated with CCA.
What happens to all of this wood when it comes out of service? That
question is becoming an ever-more-difficult thorn in the side of the
industry. Based on a 30-year service-life, researchers at the Forest
Products Laboratory (FPL) in Madison, Wisconsin estimate that 2.5
billion board feet per year (6 million m3/year) of treated-wood products (all types of preservative treatments) are currently entering the solid- waste stream, and that level will increase to 8 billion board feet per year (19 million m3/yr) by the year 2020. Some of this waste is wood that has warped, twisted, or splintered, even though it has not begun to rot. There is also a substantial amount of waste from new construction, in the form of off-cuts and scraps. This article will examine the various options available for disposal of this treated wood.
____________________________________________________________________ |
