Method and composition for enzymatic treatment of fiber for papermaking, and paper products made therewith
First Claim
1. A method for controlling organic contaminants which interfere with bleaching of fibers in papermaking systems, comprising:
- a) contacting, prior to any bleaching step, the fibers with a composition comprising at least one hemicellulolytic enzyme and at least one organic contaminant removal adjuvant to provide treated fibers from which organic contaminants liberate from the fibers in greater amount than wherein the fibers are contacted with the composition without said organic contaminant removal adjuvant, wherein the organic contaminants comprise one or more xylans, one or more pitch components, or both; and
b) bleaching the treated fibers to form bleached fibers.
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Abstract
A method is provided for controlling organic contaminants, such as xylans, pitch or both, that interfere with bleaching of fibers and/or cause other interference(s) in papermaking systems. The method includes contacting fibers before any bleaching thereof with a composition which contains a hemicellulolytic enzyme and an organic contaminant removal adjuvant to liberate the organic contaminants from the fibers. The treated fibers can then be bleached and further used, for example, in making paper. The present invention also relates to the treatment compositions and to paper products made with fiber materials treated with these compositions. A method of enhancing enzymatic degradation of a substrate as well as formulations and systems for achieving the same are also provided. Various substrates can be degraded or otherwise processed, including biomass, paper mill sludge, and animal hides. Enzymatic degradation can be enhanced by including one or more polymeric surfactants.
29 Citations
13 Claims
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1. A method for controlling organic contaminants which interfere with bleaching of fibers in papermaking systems, comprising:
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a) contacting, prior to any bleaching step, the fibers with a composition comprising at least one hemicellulolytic enzyme and at least one organic contaminant removal adjuvant to provide treated fibers from which organic contaminants liberate from the fibers in greater amount than wherein the fibers are contacted with the composition without said organic contaminant removal adjuvant, wherein the organic contaminants comprise one or more xylans, one or more pitch components, or both; and b) bleaching the treated fibers to form bleached fibers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification