How to start production of cassava starch?
Production of cassava starch is primarily by the wet milling of fresh cassava roots but in some countries such as Thailand it is produced from dry cassava chips. Starch is the main constituent of cassava. About 25% cassava starch may be obtained from mature, good quality tubers. About 60 % cassava starch may be obtained from dry cassava chips and about 10 % dry pulp may be obtained per 100 kg of cassava roots.
Fresh cassava tubers are processed during season and dry chips during the off-season in some countries. Extraction of starch from fresh cassava roots can be divided into five main stages: preparation (cassava peeling and washing), cassava rasping/pulping/grating, purification (cassava starch washing), cassava dewatering and drying, and finishing (milling and packaging).
For cassava, the process of cassava starch extraction is relatively simple as there are only small amounts of secondary substances, such as protein, in the roots. When cassava roots are harvested or selected for starch extraction, age and root quality are critical factors. Cassava roots need to be processed almost immediately after harvest, as the roots are highly perishable and enzymatic processes accelerate deterioration within 1-2 days. A first-rate quality starch can be obtained from cassava using only water, and this makes the processing of cassava starch and flour particularly suitable for developing countries and rural industries.
Following is introduction about production of cassava starch:
The basic process of production of cassava starch involved in the production of cassava starch from cassava roots are:
Sorting: The roots are sorted to select wholesome roots for processing.
Weighing: The sorted roots are weighed.
Peeling: The roots are peeled to remove the peels.
Cassava peeler
Grating: The peeled roots are grated to produce a smooth mash.
Grating machine
Hydrocyclone: Multifunction of concentration, collection, purification, & separation of residue.
Hydrocyclone
Desanding: In the desanding process, sands and sawtooth etc coarse particle will be removed from cassava slurry.
Desanding machine
Dewatering: The supernatant layer of liquid is removed by siphoning off the liquid with rubber hose and the thick slurry obtained is dewatered to reduce its moisture content.
Vacuum dehydrator
Dryer: Flash vaporization drying principle, save steam consumption.
Air stream crash dryer
Packaging: The starch is packaged appropriately.
Automatic cassava starch packing machine
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