http://www.renewableenergyworld.com/rea/news/story?id=53239The pulp and paper industry is uniquely positioned to immediately produce significant amounts of biofuels, bioenergy and bioproducts. With a mature, operating infrastructure capable of delivering double-digit billions of gallons of biofuels annually, generally without adding any new fiber processing capacity, many pulp and paper mills around the world are only a one-step investment away from becoming major renewable energy producers. Especially important, paper industry capacity that can be re-aligned and re-purposed toward bioenergy co-production would be 100% cellulosic feedstock based, with no agricultural attachments at all.
Pulp mills are ideal sites for integrated biorefinery operations for four basic reasons. First, they are already set up to receive and process massive amounts of delivered roundwood and woods chips, served in this capacity by rail, truck and some also by barge operations. In the U.S. alone, pulp mills use more than 120 million dry tons of wood per year, and they have access to at least an equal amount of forest residuals and even a greater amount of agricultural wastes and energy crops if needed.
Second, these mills have basically the same existing infrastructures for warehousing and shipping out finished products around the country. Third, they have a well-established in-place administrative infrastructure and related human resources that can be extended to serve a biorefinery business without incurring significant new costs. Fourth, pulp mills have operating utility support systems for process water, electricity, steam and waste/environmental treatment that can easily be umbrella'd to support biorefinery operations without major new investments.
And possibly as a strong fifth reason, chemical pulp mills already operate as biorefineries of sorts, producing fiber used to make paper and paperboard as well as some specialized dissolving pulps used to make viscose types of "bio-plastics" and rayon materials. Bio-byproducts made from sulfate (or kraft) spent cooking liquors (black liquor) include ingredients used in making coatings, adhesives, detergents, paint, varnish, ink, lubricants, waxes, polishes, gasoline additives, agricultural products, etc. Turpentine is obtained by condensing exhaust vapors during the pulping of softwoods with the kraft process. There also is a spectrum of lignin-based byproducts produced from refinement of black liquors.
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