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Russian Application of Filter Press in Cassava Starch Filtration
In the cassava starch production process, the filter press is mainly used for dehydration, that is, to squeeze out as much water as possible from the cassava pulp, thereby increasing the starch dry matter content and preparing for subsequent drying or packaging. The following section will introduce the application of a filter press in cassava starch filtration.
Basic Process of Cassava Flour Filtration
Cleaning and crushing of cassava
Fresh cassava is washed, peeled, and crushed into pulp.
Coarse filtration and separation
Use a cyclone or screen for preliminary filtration to separate large particles and impurities.
Sedimentation/concentration of starch slurry
Increase the solid content of starch slurry by sedimentation or centrifugal concentration.
Filter pressing and dehydration
The concentrated cassava starch slurry is sent to the filter press for pressing, the liquid is filtered out, and the wet starch is left.
Drying and packaging
The moisture content of the wet starch after filter pressing has been greatly reduced, and it can be dried more efficiently after entering the dryer.
Filter Press Operation Process
- The slurry is pumped into the filter press chambers by a feed pump, where it is evenly distributed.
- As the liquid passes through the filter cloth, the solid particles are retained, gradually forming a filter cake.
- If a diaphragm filter press is used, the filter cake can be squeezed again by compressed air to reduce the water content.
- After the filter cake is discharged, it is sent to the drying equipment for drying.
Advantages of Using Filter Press
- Efficient dehydration: effectively reduces the water content of slurry and reduces drying energy consumption.
- Energy-efficient and environmentally friendly: Minimizes reliance on steam or hot air drying, thereby lowering energy consumption and reducing carbon emissions.
- Strong production continuity: automated design can achieve continuous operation.
- Improve product quality: controlling moisture helps stabilize the particle size and color of cassava starch.
Operation Precautions
Filter cloth material selection: It is recommended to use nylon or polypropylene materials, which are wear-resistant and have moderate filtering accuracy.
Feed concentration control: Too thin feed will lead to low filtering efficiency. It is recommended that the cassava flour slurry concentration be kept within an appropriate range.
Cleaning frequency: Cassava flour is easy to adhere to the filter cloth and equipment, and it is necessary to backwash or replace the filter cloth regularly to avoid clogging.
Conclusion
Filter press plays a vital role in the production process of cassava flour (cassava starch), especially in the key link of slurry dehydration, and is a good choice.
