07:15
The Papermaking Industry: Recycled Pulping
Approximately forty percent of the fiber in U.S. paper products is recycled, or secondary, fiber. Re-pulping fibers that have already been processed shortens them and weakens their bonding capacity, so secondary fiber is often mixed with virgin fib...
05:15
Introduction to Waste Stream Management: Pollution Prevention
Recycling industrial materials that would otherwise require treatment or landfilling is known as resource recovery and is part of an emerging area of pollution prevention. Some wastes are converted directly into useful energy in municipal waste-to-...