Patent ID: 6391150
Filing Date: 2002-05-21
Classification: D21B,D21C,Y02W

Abstract:
A process for the treatment of waste paper starting material containing spores of sporulating microorganisms, without the use of biocides, chlorine compounds, hydrogen peroxide, and peracetic acid, comprising the following process steps:treating the waste paper starting material in an environment containing water in order to activate the microorganism spores, germinating the spores, further processing the waste paper starting material containing germinated spores in at least one separation stage at temperatures above room temperature (20Â° C. to 70Â° C. (68Â° F. to 158Â° F.)), hot dispersing the further processed waste paper starting material in a water vapor atmosphere at a pressure greater than atmospheric pressure, subjecting the dispersed material to a temperature-controlled treatment, and processing into a largely spore-free recycled pulp, from that into a largely spore-free base tissue with a total germ count of less than 1000 CFU/g and a surface germ count of less than 20 CFU/dm2.