Agriculture Reference
In-Depth Information
bran, oat flakes, breakfast cereals, wheat bread and whole wheat pasta. Also, the products
obtained from the treatment of sugar beet and other industrial plants rich in cellulose,
hemicellulose, lignin, tires, pectin and similar components are attractive sources of dietary
fiber.
Sugar beet pulp is obtained in the processing of sugar beet as a fibrous residue of sugar
beet root after the extraction of sucrose by use of warm water. The amount and chemical
composition of the sugar beet pulp are primarily defined by the quality, variety and growing
conditions of sugar beet. The dry matter content of sugar beet pulp after extraction is
approximately 8-11%. In order to reduce the moisture content of sugar beet pulp is dried to
dry matter content 87-90% for longer storage of sugar beet pulp (Šušić et al., 1994).
Sugar beet pulp is almost completely used as feed for livestock. Finding new possibilities
of using the extracted pulp is particularly challenging in the sugar refining industry due to the
abundance of pulp obtained during the processing of beet and a number of new ways have
been proposed for the application to sugar beet pulp as well as for some of its constituents
(Thibault, 2000). The different physical, chemical and biological treatments are used to
transform the extracted pulp or extraction of components from pulp and the use of made
refined products. Physical treatments are applied mainly to eliminate impurities and beet
characteristic earthly taste and aroma. The goal of chemical treatment is a modification of
some beet pulp properties or obtaining basic ingredients such as pectin, cellulose and araban
(Vogel 1991, Broughton et al. 1995, Micard et al. 1996). Numerous studies have been
devoted to the processes of dietary fiber from sugar beet production for obtaining additives
intended for the food industry, as well as the dietary fiber, and this is certainly one of the most
important forms of their application, in addition to use as fodder (Persson 1986, Fasatiova
1988, Gyuri et al., 1991, Rede et al., 1992, Šereš et al., 2005).
M
ATERIALS AND
M
ETHODS
Materials
Sugar beet pulp was obtained from “Senta” sugar factory (Senta, Serbia). Before the
experimental procedure, sugar beet pulp was stored at 4
o
C. For the chemical treatment of the
extracted pulp commercially available hydrogen peroxide was used (22,6%.). To maintain the
base environment, or an appropriate pH value sodium hydroxide was used, concentration 10
M. In the neutralization of the reaction mixture hydrochloric acid was used, p.a. 36.2%.
Drying and Rehydration
For dietary fibers production as a raw material sugar beet pulp derived from a process of
sugar production can be used. From the mas of sugar beet pulp larger pieces were separated
because they were inadequate for conducting experiments. Two types of dietary fiber
untreated (raw) and treated fibers (decolorized with hydrogen peroxide) were analyzed.
Chemical treatment of sugar beet pulp in order to decolorize them was conducted by the use
of hydrogen peroxide solution in alkaline media (pH=11) adjusted with sodium hydroxide (10
