Problem Summary

Poor fresh water quality can frequently be associated with sheet quality problems and high maintenance costs.  To produce a single ton of paper in a typical bleach mill, several tons of water are required.  If the water contains high levels of suspended solids, iron, manganese, and/or color, the quality of the paper will be affected and the maintenance costs due to corrosion and deposits will escalate.  Good quality water is especially important in bleach mills producing paper of high brightness.  If fresh water is not properly treated, production of high brightness paper can be adversely affected in two ways: 1) iron and manganese can cause brightness reversion and 2) organic matter that causes color in the water will drive up bleaching costs.  Suspended solids can also contain spores that will negatively impact food grade board.

Recommended Solution

KlarAid™ Clarification Technology can significantly reduce the variability of fresh water supplied to the pulp and paper mill reducing the impact of poor water quality on the process and the finished paper.  KlarAid coagulants function over a wide range of raw water turbidity, pH, and temperature.  Some coagulant programs do not manage these variations very well.  However, the flexibility offered by KlarAid chemistries help mills around the globe maintain low turbidity, iron, manganese and color in mill fresh water.

Key benefits recorded from practical applications of KlarAid™ Clarification Technology include:

Function over broad ranges of fresh water temperature, pH, and turbidity
Form their own precipitates that sweep suspended solids from the raw water
Enhance color removal at near neutral pH
Reduced impact on paper quality from brightness reversion
Reduced potential for spores to enter process water stream

Hercules is the global, exclusive distributor for GE Water Technologies products.  KlarAid is a GE Water Technologies trademark and is used under license.  This trademark may be registered in one or more countries.