Numerous recovery options offer solutions for mill effluent closure

There are many ways to modify a paper mill to reduce the use of chlorine or recover it during the papermaking process. The kraft papermaking process is broken down into steps, and each step is considered in reducing or recovering beach. For example, bleach can be reduced by increasing the capacity of the evaporator during the phase in which black liquor is evaporated. Five techniques for increasing this capacity are described. Methods for reducing chlorine bleach during each of the papermaking steps are offered.
WHEN EVALUATING POTENTIAL PULP AND paper mill modifications to reduce chlorine use and/or recover organic residues from pulping and bleaching, process engineers must consider the impact of such changes on [...]