Cassava is originated in tropical America about 4,000 years of
cultural history. It is a perennial sub-shrub, and also known as
cassava, sweet potato wood, underground tuber. It is one of the
worlds top three major potato (potato, sweet potato, cassava).
Roots are cylindrical with different number and thickness breeds.
Cassava is mainly used for food, feed and extraction of starch. It
can be divided into sweet, bitter two species types. Because all
parts of cassava plants contain hydrocyanic acid, When we use
cassava roots and leaves for food and feed, we should pay attention
to processes like detoxification, dehydrating, drying slices,
steaming to peeling and grinding starch etc. Slices drying can
remove 75% of the general hydrocyanic acid. The starch content
after processing system is minimal. Sweet kind of cassava after
steaming or slices drying is safe to use directly. Bitter kind of
cassava after detoxification can also be safe to use, but only for
producing starch.. Cassava roots contain high starch. Fresh potato
contains 20% -35% of starch, 1-2% of protein, 0.3-4.3% of fat, 1-2%
of cellulose, 1% of ash, 60% ~ 80% of humidity which indicates that
cassava is a good raw material for producing starch.
The design uses todays advanced technology, scientific, reasonable,
mature technology process: one time clean, two times grinding, one
time grinding and dehydration, vacuum air dry production process
with features like high yield, high brightness, and low loss of
This production line uses fresh cassava as material to produce
cassava starch which can meet the requirements.
Transportation and cleaning
Collect the fresh cassava from stock ground, and transported by the
conveyor belt to peeling machine for peeling and stone removing.
After firstly remove the impurities on the surface, the cassava is
transported into washing process. After washing twice by trough
conveyor and roller, the sediment and impurities on the surface of
cassava have been basically removed; and peeling rate can achieve
80%. After cleaning process, the cassava will be transported into
the crushing process.
Clean cassava will be broke into pieces by flying hammer type
grinding machine in order to break the organizational structure of
cassava. So that small starch granules can be disintegrated from
the cassava root. Water plays the medium here. After twice
crushing, cassava becomes slurry. The starch slurry after the first
crushing can pass through 6 ~ 8mm puree sieve. The starch slurry
after twice crushing can pass through 1.2-1.4mm puree sieve. The
starch is basically free and becomes a mixture of pulp residue,
then pumps it into the sieve for separation.
Residue slurry mixture passes through four vertical separators to
be separated. Cassava waste will be transported to the residue
field. And the starch extraction can already meet the standards of
products only with protein, sediment and other organic and
inorganic impurities to be proceeded in next process.
Separating and concentrating
Starch will be pumped through the sediment remover to remove
inorganic impurities. And then into the first disc separator, and
then into the second disc separator. The main function of first
disc separator is to remove protein, and the main function of
second disc separator is to concentrate to be dehydrated. After the
above treatment process, starch basically reached the requirements
of the finished product. Following processes are dehydration,
Concentration of starch out of disc separator is generally 18 ~
20degree. After centrifuge treatment, the water content of starch
decreased from 60% to 38 ~ 40%; dehydration of water (containing
about 1 to 5% starch) continues to be concentrated in