SUCCESSFUL PAPER-MILL TRIAL FOR SLIME CON TROL, REPLACING ORGANIC BIOCIDES WITH PERACETIC-ACID

Slime formation in paper machines has long been a cause of losses to p aper manufacturers, this has led to the use of slime control agents in paper manufacture. The slime control agents have changed over the yea rs from mercuric compounds through chlorine compounds to today's organ ic biocides. Specific peroxygen technology for this application was fi rst developed in Brazil in 1988 and involved the tandem addition of or ganic biocide and Hydrogen Peroxide. This system was then further refi ned in Finland at Kaukas Voikkaa Mill. The efficacy of that system has led to a successful trial eliminating all organic biocides and replac ing them with a Peracetic Acid formulation.