A method for re-dispersing dewatered, partially dried or essentially dried microfibrillated cellulose, the method comprising the steps of: (a) adding a quantity of a suitable dispersing liquid to a tank having at least a first and a second inlet and an outlet, wherein the tank further comprises a mixer and a pump attached to the outlet; (b) adding a quantity of dewatered, partially dried or essentially dried microfibrillated cellulose to the tank through the first inlet in sufficient quantity to yield a liquid composition of microfibrillated cellulose at a desired solids concentration of 0.5 to 5% fibre solids; (c) mixing the dispersing liquid and the dewatered, partially dried or essentially dried microfibrillated cellulose in the tank with the mixer to partially de-agglomerate and re-disperse the microfibrillated cellulose to form a flowable slurry; (d) pumping the flowable slurry with the pump to an inlet of a flow cell, wherein the flow cell comprises one or more sonication probe in series and at least a first and a second outlet, wherein the second outlet of the flow cell is connected to the second inlet of the tank, thereby providing for a continuous recirculation loop providing for the continuous application of ultrasonic energy to the slurry for a desired time period and/or total energy input range, wherein the flow cell comprises an adjustable valve at the second outlet to create back pressure of the recirculated slurry of from 0 to 4 bar, further wherein the liquid composition comprising microfibrillated cellulose of step (c) is continuously recirculated through the recirculation loop at a temperature of 20°C to 50°C; (e) applying an ultrasonic energy input to the slurry of 200 to 10,000 kWh/t continuously by the sonication probe at a frequency range of 19 to 100 kHz and at an amplitude of up to 60%, up to 100% or up to 200% to the physical limitations of the sonicator used for 1 to 120 minutes; (f) collecting the re-dispersed suspension comprising microfibrillated cellulose with enhanced tensile strength and/or viscosity properties from the first outlet of the flow cell in a suitable holding vessel. (a) adding a quantity of a suitable dispersing liquid to a tank having at least a first and a second inlet and an outlet, wherein the tank further comprises a mixer and a pump attached to the outlet; (b) adding a quantity of dewatered, partially dried or essentially dried microfibrillated cellulose to the tank through the first inlet in sufficient quantity to yield a liquid composition of microfibrillated cellulose at a desired solids concentration of 0.5 to 5% fibre solids; (c) mixing the dispersing liquid and the dewatered, partially dried or essentially dried microfibrillated cellulose in the tank with the mixer to partially de-agglomerate and re-disperse the microfibrillated cellulose to form a flowable slurry; (d) pumping the flowable slurry with the pump to an inlet of a flow cell, wherein the flow cell comprises one or more sonication probe in series and at least a first and a second outlet, wherein the second outlet of the flow cell is connected to the second inlet of the tank, thereby providing for a continuous recirculation loop providing for the continuous application of ultrasonic energy to the slurry for a desired time period and/or total energy input range, wherein the flow cell comprises an adjustable valve at the second outlet to create back pressure of the recirculated slurry of from 0 to 4 bar, further wherein the liquid composition comprising microfibrillated cellulose of step (c) is continuously recirculated through the recirculation loop at a temperature of 20°C to 50°C; (e) applying an ultrasonic energy input to the slurry of 200 to 10,000 kWh/t continuously by the sonication probe at a frequency range of 19 to 100 kHz and at an amplitude of up to 60%, up to 100% or up to 200% to the physical limitations of the sonicator used for 1 to 120 minutes; (f) collecting the re-dispersed suspension comprising microfibrillated cellulose with enhanced tensile strength and/or viscosity properties from the first outlet of the flow cell in a suitable holding vessel.