Impacts of global pulp and paper industry
I mpacts of global pulp and paper industry wii be described below
Read MoreThe Environmental Impact of Pulp and Paper Industry
T
he pulp and paper-making industry has major impacts on natural ecosystems, air and water quality and human health. As the report and case studies demonstrate, the type and intensity of impacts vary considerably around the world.
Read MorePulp and paper use
P ulp and paper industry are commonly growing up due to the increasing of pulp and paper consumption in the world, now it currently take place mainly in the North. Production is highly integrated, and there is comparatively little international trade in constituent products; some of the largest paper makers also consume the most paper.
Read MoreCooking Reaction in the digester
C
ooking reactions start whens chips are at the cooking temperature. The active chemicals in the cooking liquor react with lignin in chips and convert it chemically into the compounds that dissolve in the cooking liquor. Lignin is the bonding material in chips that holds individual fibres together. After dissolving the lignin, fibres are easily separated into the mass that is leaving the digester as pulp.
Read MoreChemical Pulping Description
C hemical Pulping includes all methods of pulp manufacture in which materials containing cellulose fibres are treated with aqueous alkaline or acidic solutions. The aim of chemical pulping is to remove enough lignin so that the fibres are free and give them the required characteristics at the lowest possible cost. Two processes dominate chemical pulping: the sulphate or the Kraft and the sulphite processes. Each process is designed to produce pulp with specific characteristics. This paper concentrates only on the Kraft process application.
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