نوع مقاله : علمی-ترویجی
نویسندگان
چکیده
عنوان مقاله [English]
نویسندگان [English]
Nowadays, annual consumption of paper in the world and also in Iran is
growing. To provide the present need, finding new ways for optimum usage of
lignocellulosic resources and improved production methods are required. One of
the common problems in the papermaking industry is existence of undesirable
compounds and by-products such as pitch, stickiesand external contamination in
papermaking process that each of these materials may arise from various sources.
Wood, as a raw material for pulping, because of having hydrophobic materials such
as waxes, lipids, fatty acids, resin acids, hydrocarbons, etc,can be the origin of
such contaminants. The pitch can cause significant problems in papermaking
equipment. For example, it can block drainage felt or attach to wire or drying
cylinders and cause holes in the paper. Up to now, various methods have been
proposed to control and eliminate these problems. Enzymes due to having various
applications such as pitch control, reducing the refining time, helping in pulp
dewatering, improving bleaching efficiency and increasing pulp yield, have gained
a lot of popularity in pulp and paper industry. Enzymes cause hydrolysis of
triglycerides and prevent their formation. Furthermore, enzymatic treatments is the
basis of pitch and stickies control which can be used to reduce the size of these
materials. In this paper, efforts are done to investigate utilization of enzymes as a
new and environment friendly method based on biotechnology to control pitch in
papermaking process.
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