After wood chips are pulped, either by chemical or mechanical means, the resulting pulp has a brownish color. In order to create a white or lighter colored final product, the pulp much be bleached. This module provides a brief background on wood fibers and chemical pulping, and then provides information on what bleaching is and how it fits into the papermaking process.
•Identify and describe key equipment used in bleaching operations
•Describe the purpose and application of each piece of equipment
•Identify and describe typical bleach stage layouts
•Identify key considerations in selection of pump types
•Describe advantages and disadvantages of different tower types
•Identify and describe safety hazards associated with equipment used in bleaching
