separationTraditional cassava starch is produced through a separation ofstarch granule from cassava root by a wet milling. The starchgranules are separated and then dried using sunlight. Cur-rently, native starch plants utilize processing units of chopper,rasper and extractor (Fig. 2) to separate the starch granulesfrom the cassava pulp. Washed cassava roots are initiallychopped with a cutting blade into small pieces and then gravi-metrically fed to a saw-tooth rasper, producing starch slurry.Cell walls of the root are shredded and the starch granules areseparated. Starch slurry from the rasping unit is a mixture offree and bound starch granules, cassava pulp, water, and otherimpurities.The starch slurry is pumped to the top of a conical-screen extractor, containing nozzles that continually sprayfresh water. Centrifugal force drives the starch granules topass through the screen. The cassava pulp is retained anddischarged at the upper outlet. The starch-pulp separationtakes place in a 2-stage extraction unit, i.e., coarse andfine screen extractors. A coarse extractor generally has aperforated stainless screen with 80–90 mesh (0.177–0.163 mm),