Enzymatic upgrade of old paperboard containers
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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.
Pala, H., et.al. 2001. Enzymatic upgrade of old paperboard containers. Enzyme and microbial technology. 29(4-5): pp. 274-279. Available from DOI: http://dx.doi.org/doi:10.1016/S0141-0229(01)00380-5