Abstract
Main biological problem in pulping process is fungi deposition on pulp sheet. Fungicides are generally used to prevent fungi deposition. Fungicides and the application method are described.
In addition, it is becoming more important to recover the effluent and reuse it in the deinking process. But this effluent is difficult to treat because it has high pH and contains fine suspended solids. The coagulation method, using a high charged cationic polymer can get rid of fine particles and give clear recycling water. As a result it has such advantages as high brightness, high strength of DIP and preventing pitch problem.
