Enzymatic upgrade of old paperboard containers

Pala, Helena; Lemos, M. A.; Mota, Manuel; Gama, Francisco Miguel

http://hdl.handle.net/10400.8/79

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Authors

Pala, Helena

Lemos, M. A.

Mota, Manuel

Gama, Francisco Miguel

Abstract(s)

The use of enzymes in secondary fiber (old paperboard containers) upgrading was investigated. The following aspects were analyzed: (i) the effect of several enzymes and (non-hydrolytic) cellulose-binding domains on the pulp and paper properties; (ii) factors influencing enzymatic treatment of secondary fiber: enzyme dosage and reaction time; and (iii) enzyme action on fractions with different fiber-length. In general, all the tested enzymatic preparations were able to improve the pulp drainability. In most cases this improvement was obtained at the expense of paper strength. The use of cellulose-binding domains allowed for the simultaneous increase in drainability and strength properties.