Disclosed is a method for producing nanocelluloses from a cellulose substrate including cellulose fibers, the method including the following sequence of steps: a step of enzymatic treatment of the cellulose substrate, by bringing same into contact with at least one cleaving enzyme, then a step of mechanical treatment of the cellulose substrate subjected to the step of enzymatic treatment, in order to delaminate the cellulose fibres and obtain the nanocelluloses. The at least one cleaving enzyme is chosen from the enzymes belonging to the family of lytic polysaccharide monooxygenases (LPMOs) capable of achieving cleavage in the presence of an electron donor. Also disclosed are the nanocelluloses obtained according to the method.

The present invention relates to a method for reducing the load of microbial contaminants in a pulp stock comprising a recycled fiber fraction, said method comprising the following steps performed in sequence: a) providing a pulp stock comprising a recycled fiber fraction at a consistency in the range of 2-10 wt % in water; b) adding a basic oxide selected from the group consisting of calcium oxide (CaO) and sodium oxide (Na2O) to the pulp stock and allowing the basic oxide to react with water to form the corresponding hydroxide, wherein the amount of the basic oxide added is sufficient to raise the pH value of the pulp stock to above 12.5 and to maintain the pH value of the pulp stock above 12.5 for at least 60 minutes; c) allowing the pulp stock to remain at a pH value above 12.5 for at least 60 minutes; and d) adding an organic oxidative acid to the pulp stock, wherein the amount of the organic oxidative acid added is sufficient to reduce the pH value of the pulp stock to below 10.

The present invention relates to a method for reducing the load of microbial contaminants in a pulp stock comprising a recycled fiber fraction, said method comprising the following steps performed in sequence: a) providing a pulp stock comprising a recycled fiber fraction at a consistency in the range of 2-10 wt % in water; b) adding a basic oxide selected from the group consisting of calcium oxide (CaO) and sodium oxide (Na2O) to the pulp stock and allowing the basic oxide to react with water to form the corresponding hydroxide, wherein the amount of the basic oxide added is sufficient to raise the pH value of the pulp stock to above 12.5 and to maintain the pH value of the pulp stock above 12.5 for at least 60 minutes; c) allowing the pulp stock to remain at a pH value above 12.5 for at least 60 minutes; and d) adding an organic oxidative acid to the pulp stock, wherein the amount of the organic oxidative acid added is sufficient to reduce the pH value of the pulp stock to below 10.