Process of processing cassava starch from cassava tubers

Please introduce the process of cassava starch processing from cassava tubers.

1. Grinding cassava into porridge

Different tools can be used to grind cassava into porridge. Using two hands to grind cassava tubers on manual cassava grinding table with thorny metal plates. Productivity 5 - 7 kg / hour. Using rotary hand rubbing machines, there are thorny metal plates mounted on the rotating shaft. Powdered porridge pot with water submerged on the underside of the prickly metal sheet to clean the grinding surface. Productivity is not 10 - 15 kg / hour

- To increase productivity, using a cassava grinding machine to kick foot like a thresher. Hand threshing teeth with prickly metal plates: The length of the observation wheel is only 15 - 20 cm to fit the foot strength. Lower the table to bring the rice to guide cassava tubers into the grinding surface. Foot-operated cassava grinding machine can reach a capacity of 100 kg / hour.

- If there is a pulling motion, the wooden shaft is hard and small nailing instead of thorny metal plate. The cassava milling machine has an engine capacity of 300-500 kg / hour.

2. Filter the pulp

- Take a part of porridge using four parts of water to remove cassava pulp. The finer the microfiltration, the more beautiful cassava starch is obtained. The microfiltration is stretched into shells or sewn into bags for easy filtration. Starch together with water passes through microfiltration to form a powder. Fluid in the settling tank.

- Cassava pulp used as raw materials for cattle and poultry feed.

3. Recovering starch

You can simply use plastic lining in the baskets to settle. If less, you can use a settling basin, washing starch.

- Sedimentation tank has a lying, wide-bottomed shape, not too high. If it is a specialized tank for cassava starch processing, it is necessary to have a distant tap 10 to 15 cm from the bottom. Remove the powder for at least 12 hours (usually deposited overnight), when the powder has settled in the bottom of the tank, use a rubber hose or plastic tube x to decant the water on the surface of the powder. When decanting water, do not disturb the starch.

- Use clean water to wash the surface of starch. The surface washing water is mixed into the powder of the next batch to recover the powder. After that, scoop out the starch to remove it. 2.5 - 3 kg of cassava tubers for 1 kg of wet starch. The ratio of obtained starch depends on the fineness of the porridge, the technique of filtering residues and manipulating starch.

4. Preserving wet starch

Wet starch is preserved by ang, jars, pots, tanks, plastic bags. The longer the powder is kept, the longer it will remain.

- If in large quantities, store wet starch in a plastic bag and bury it under the ground to cover the crop.