Use of a disinfectant for the removal and/or reduction of biofilm and/or germination number in liquid and/or liquid bearing system of printing works and/or in solutions in the paper production, is claimed, where the disinfectant comprises at least a peroxide compound, at least a surface-active substance, which is e.g. alkali salt of fatty acid, amino acid derivative with surfactant effect or glycol ether and/or their derivatives, and at least a food preservative and/or its derivative, preferably e.g. sorbic acid, acetic acid or propyl-parahydroxybenzoic acid and/or their salts or derivatives. Use of a disinfectant for the removal and/or reduction of biofilm and/or the germination number in liquid and/or liquid bearing system of printing works and/or in solutions in the paper production, is claimed, where the disinfectant comprises at least a peroxide compound, at least a surface-active substance, which is sugar surfactant, quaternary ammonium compound, alkali salt of fatty acid, amino acid derivative with surfactant effect or glycol ether and/or their derivatives, and at least a food preservative and/or its derivative, preferably sorbic acid, acetic acid, propionic acid, ascorbic acid, formic acid, lactic acid, pyruvic acid, tartaric acid, malic acid, benzoic acid, benzoyl-benzoic acid, salicylic acid, citric acid, methoxy-benzoic acid, hydroxy-benzoic acid, methyl-parahydroxybenzoic acid or propyl-parahydroxybenzoic acid and/or their salts or derivatives, where the concentration of the surface-active substance is less than 0.5 wt.%. Independent claims are included for: (1) use of a disinfection solution comprising disinfectant and/or a liquid to be disinfected or a liquid of a liquid bearing system for the removal and/or reduction of biofilm and/or the germination number in liquid and/or liquid bearing system of printing works and/or in solutions in the paper production, where the disinfection solution comprises at least a peroxide compound in a final concentration
