Rice production is normally separated between rice milled and rice refining process. Milling rice starts from removing all impurities and unfilled grains from paddy. Then, the second step is removing hard protective husk process; the rice husk is the protective layer surrounding the grain. Once removed, the rice grain is packaged as brown rice. Next step is to removal of the germ and brown layers. Gentle milling removes the germ and bran layers from the grain to expose a white starch center. The polished white starch center is what we know as white rice.
The below chart is shown rice refining process. Raw rice material is collected from different milled rice sources. The rice is going through pre- cleaning process which is removing all impurities, and separate small stones from the rice before taking to whitening and polishing process in order to improving the appearance of milled rice by removing the remaining bran particles and by polishing the exterior of the milled kernel. Consequently, the rice is grading by separating from small length to large broken from head rice. Somehow, as required by customer, there is blending process mixing head rice with predetermined amount of broken, and sorted out the color of rice and damaged grain. Later, the rice is maintained in silos before weighting and bagging delivering to customer.
The method of processing tapioca chips is very simple, consisting of peeling, washing, chipping the cassava roots, and then sun drying the slices or chips. The chips are dried irregular slices of roots, which vary in size but should not exceed 5 cm in length so that they can be stored in silos. The recovery rate of chips from roots is about 20-40% depending on the initial dry-matter content of the cassava roots and the final moisture of the chips. The chips should be white or near white in color, free from extraneous matter, molds, insect infestation and damage, and possess no peculiar odors.
Sangfah’s tapioca process, showing in below chart, starts from collecting tapioca chips raw material from the village network. Then, passing them through contaminate and quality checking process before keeping in silos, and delivery.