There are two type of pulp yield . Cooking Yield and Bleached Yield. Cooking yield = Bleached Yield/Total loss ( Blow tank to Final stage) Bleached Yield = Pulp produced in ADT X 0.9/Chip consumed (ODT)
Parsons and Whittemore is a world leader in the production of both market pulp and bleached kraft pulp
NBSK is short for northern bleached softwood kraft market pulp
Pulp is washed at two different junctures in a chemical pulping process The Brown Stock is washed following the digester and the Bleached Stock is washed with multi stage bleach.
Bleached chemical pulps consists of more than 90% cellulose. The balance are hemicellulose.
Bark is stripped from the tree, then sent to a pulp mill where it is turned into pulp through a mechanical or chemical process. The pulp is then washed, screened, and bleached before being formed into paper through a paper making machine. Finally, the paper is dried and rolled into large rolls for distribution.
Paper pulp is grayish or brownish-gray when first made. If left untreated, it will remain that same grayish color. To alter the color, the pulp is bleached, and then to make the finished product in the myriad of colors that are available, dies are added.
They can be paper, silk or plastic. They can be a blend of wood and vegetable fibers. The vegetable fiber is bleached pulp abaca hemp, a small tree grown for its fiber.
Wendy Jane Lyn has written: 'The influence of nutrients on the removal of chlorinated organic compounds from bleached kraft pulp mill effluent in activated sludge treatment'
Brown paper is typically made from wood pulp, specifically the cellulose fibers found in trees like pine, spruce, or fir. These fibers are processed and bleached to create the paper product we commonly see. Additionally, brown paper can be made from recycled paper materials to decrease environmental impact.
Writing materials like paper and envelopes are typically made from wood pulp obtained from trees. The pulp is processed, bleached, and pressed into sheets for paper and envelopes. Sometimes, recycled materials or alternative fibers like cotton or hemp may also be used in the production of these items.
Toilet paper is typically made from wood pulp that comes from softwood trees like pine or fir. The wood pulp is processed and bleached to create the soft and absorbent paper product we use in bathrooms. Some eco-friendly options also use recycled paper fibers in their production process.