A method for suppressing sedimentation of suspended substances is a method for suppressing sedimentation of suspended substances in water at the bottom of a tank disposed in a water system in papermaking equipment, comprising a step of blowing an oxygen-containing gas into the water, for stirring and aeration; a step of detecting a change with time in existence states of the suspended substances in the tank by the stirring and the aeration; and a control step of feeding at least one of an oxygen-containing gas and a slime control agent to the tank based on the detection result to suppress the sedimentation of the suspended substances in the tank.

A method for suppressing sedimentation of suspended substances is a method for suppressing sedimentation of suspended substances in water at the bottom of a tank disposed in a water system in papermaking equipment, comprising a step of blowing an oxygen-containing gas into the water, for stirring and aeration; a step of detecting a change with time in existence states of the suspended substances in the tank by the stirring and the aeration; and a control step of feeding at least one of an oxygen-containing gas and a slime control agent to the tank based on the detection result to suppress the sedimentation of the suspended substances in the tank.

A self-stabilized glyoxalated polyacrylamide (gPAM) resin composition is disclosed. The gPAM resin composition consists essentially of an aqueous reaction product of a cationic polyacrylamide (cPAM) prepolymer and glyoxal carried out in an aqueous reaction mixture having a total solids of less than a critical concentration of the gPAM resin and a pH of at least about 7.5. The cPAM prepolymer comprises a weight average molecular weight (Mw) of at least about 5,000 Da and a cationic monomer content of at least about 4, alternatively at least about 10 mol %. The reaction product is prepared without addition of any acid. The gPAM resin composition maintains a substantially single phase for a stability period of at least about 1 day after preparation, without the addition of any acid or other stabilizing compounds. Methods of preparing and using the gPAM resin composition are also disclosed.

A self-stabilized glyoxalated polyacrylamide (gPAM) resin composition is disclosed. The gPAM resin composition consists essentially of an aqueous reaction product of a cationic polyacrylamide (cPAM) prepolymer and glyoxal carried out in an aqueous reaction mixture having a total solids of less than a critical concentration of the gPAM resin and a pH of at least about 7.5. The cPAM prepolymer comprises a weight average molecular weight (Mw) of at least about 5,000 Da and a cationic monomer content of at least about 4, alternatively at least about 10 mol %. The reaction product is prepared without addition of any acid. The gPAM resin composition maintains a substantially single phase for a stability period of at least about 1 day after preparation, without the addition of any acid or other stabilizing compounds. Methods of preparing and using the gPAM resin composition are also disclosed.

Systems and methods as disclosed herein automatically provide real-time dosing corrections for industrial processes wherein enzymatic compositions are applied to natural fibers for producing a pulp/paper product. Predictive models are developed to correlate observed properties of various products with various combinations of process inputs including enzyme blend characteristics. For a current process, an initial enzyme blend and respective dose rates for components thereof is selected based on target properties for the pulp/paper product. Upon application of the initial enzyme blend, real-time feedback data is provided corresponding to measured actual values for enzyme activity of at least one enzyme blend component. During the industrial process, respective dose rates for at least one of the one or more components of the enzyme blend are selectively and dynamically adjusted, based at least in part on the measured enzyme activity.

Systems and methods as disclosed herein automatically provide real-time dosing corrections for industrial processes wherein enzymatic compositions are applied to natural fibers for producing a pulp/paper product. Predictive models are developed to correlate observed properties of various products with various combinations of process inputs including enzyme blend characteristics. For a current process, an initial enzyme blend and respective dose rates for components thereof is selected based on target properties for the pulp/paper product. Upon application of the initial enzyme blend, real-time feedback data is provided corresponding to measured actual values for enzyme activity of at least one enzyme blend component. During the industrial process, respective dose rates for at least one of the one or more components of the enzyme blend are selectively and dynamically adjusted, based at least in part on the measured enzyme activity.