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The sugar production process
involves three steps: (a) crushing of the sugarcane, (b) clarification
of the sugarcane juice and crystallization of sugar and (c) separation.
The sugarcane received from the farmers is uniformly fed to the fibrizor
to prepare the same for efficient milling. The sugarcane is crushed to
extract the sugarcane juice. The juice extracted from the milling plant
is mechanically screened. The juice is then heated to about 70 degree
centigrade in rapid flow vertical juice heater. The heated juice is
limed and sulphited in a continuous juice sulphiter. The treated juice
is then heated to approximately 105 degree centigrade and made to enter
a flash tank for the removal of gas and air before letting it into a
continuous clarifier, where the settling of the mud and other impurities
takes place. The clear juice is then sent to the evaporators for
concentration. The muddy juice is filtered in rotary vacuum filters and
recycled back in to the process while impurities taken out in the form
of filter cakes are removed. The concentrated juice known as syrup is
further boiled until the sugar crystallizes. Lastly, the mixture of
sugar crystals and the syrup is spun in a centrifuge, which separates
the sugar crystals (also called plantation white sugar) to produce sugar
and molasses. The sugar produced is dried, graded and packaged for
storage and marketing.
Molasses, filter cake and bagasse (the fibrous residue leftover after
crushing sugarcane and extracting its juice), are by-products of sugar
production process. The molasses and filter cake are sold in the market
to generate revenue.
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