Solutions for Starch and Wweeteners
Starch centrifugal equipment are mainly used in the process of refining of corn, cassava, potatoes, wheat and other raw materials: the pre-concentration of puree: gluten and starch separation, gluten concentration, and following process of washing is done for clarification.
This centrifuge can also be used for pre-concentration, separation, concentration and clarification of two different materials in the pharmaceutical, chemical, and food industries.
Application of Centrifuges in Starch Production
The wheat starch production process is done through a Sedimentation Centrifuge (FCS series centrifuge) for starch and protein separation.
The prerequisite for the separation via a decanter centrifuge (HDS/HDC series centrifuge) is that it must be carried out in the liquid. It is necessary that the density difference between the components of the material is separated. There comes a larger density difference and if the solid particles of material can form as a suspension, the more easier it is to be separated.
Starch is an insoluble placed in cold water. Most of the plant proteins are insoluble in cold water as well, therefore, the water as the auxiliary medium to form a suspension during the separation in starch production. The Decanter Centrifuge (HDS/HDC series centrifuge) can separate the starch and protein or separate different density of the starch components. It is also able to isolate the starch and protein so that it does not dissolve in water from the suspension (liquid-solid separation). This specific operation is divided into three following points:
Starch Production Wastewater Concentration
During the starch production, waste water will contain small particles. With high viscosity, the use of the filtration method is done with very low efficiency. More than 5% of the concentration of wastewater is processed by a decanter centrifuge (HDS/HDC series centrifuge) which is for concentration, dehydration, and the recovery of dry matter. If the concentration is too low, you can use the Disc Centrifuge. First use a disc centrifuge for pre-concentration, and then use a decanter centrifuge for dehydration. The new double cone decanter centrifuge separation factor can reach 7,000 ~ 10,000. When the disc centrifuge becomes flat, the disc centrifuge is given the task of separation which is difficult to separate. The Decanter Centrifuge has a long drum that can handle high concentrations of materials, can be continuous operation, heavy phase solid content is high (19% to 23%), the material can contain larger particles (5 mm or more), To be relative to the disc centrifuge, one can only adapt to low concentrations of material. The material particles cannot be greater than 1mm (otherwise the nozzle is easy to block), heavy phase solid content is low (12% –-14%). Every 2–3 days, this must be washed at least 1 time to avoid shortcomings.
The Efficiency of Centrifuge Hehydration is 5 to 10 times higher than the method using evaporation (heat, freezing, etc.). It contain small particles in the slurry. The viscosity is relatively high, then filtration method of dehydration is not only inefficient, but with highly moisture content after process. Gluten recovery (corn starch) and wheat starch dehydration will achieve a better result via decanter centrifuge (HDS/HDC series centrifuge) where moisture content is less than 54%.
In the modern starch production process, the decanter centrifuge (HDS/HDC series centrifuge) is deemed as highly efficient with continuous operation equipment has been widely used especially in the wheat starch production process.