Most Kraft pulping
mills sell their waste streams to chemical companies, which further process this waste into value-added products.
Lignin--the natural glue that holds wood fibers together--is a byproduct of the Kraft pulping
process that has traditionally been burned to provide energy to a mill.
According to the company, the chemical pulping equipment will be used to recover chemicals in the kraft pulping
process and the recycled fiber processing system for the production of linerboard.
AV Terrace Bay runs a pulp mill converting wood into pulp using a kraft pulping
process, which generates industrial effluent that undergoes primary and secondary treatment prior to being discharged into Lake Superior via Blackbird Creek.
During fungal treatment and kraft pulping
, hemicelluloses were also decayed at some extent.
Among specific topics are process redesign, effluent toxicity, kraft pulping
, processing recycled fiber, black liquor gasification, and impulse technology for dewatering paper.
* Kraft Pulping
Liquor Cycle Fundamentals, June 2, Courtyard Houston International Airport, Houston Texas.
In this study, the kraft pulping
characteristics, fiber properties, and handsheet properties of small-diameter trees and tops from three eastern Washington wood species (lodgepole pine, Douglas-fir, and western larch) were determined.
Examining various chemicals present in effluents from papermaking, they found that wastewater from "kraft pulping
mills" harmed the fish most seriously--even though it contains no chlorinated compounds.
BioChoice, a by-product of the kraft pulping
process, is a 100% bio-based sustainable alternative to fossil-based products and holds the USDA Certified Biobased product label.
"We have a very competitive environmental platform from a kraft pulping
and bleaching standpoint, and it was installed for about 10% of the price of comparable systems," said Van Scotter.