Abstract
AbstractExperiments for Improvement of the Filtration of Starch Syrup. Possibilities for the improvement of starch syrup filtration according to these experimental results do not primarily depend on the type of plant which is used but on composition and the amount of suspended matter in syrups to be filtered. It was found that products of discontinually operating reactors are inhomogeneous. Even in products of 40 DE unsoluted starch could be traced. Laboratory tests have shown that a change of filtration rate of starch hydrolysates in the range below 46 DE is greater than in the range over 46 DE.A connection was found to exist between the degree of degradation and the electro‐kinetic properties. Moreover, it was found that the amount of filtration inhibiting matter cannot be reduced to a level below 5 vol.‐%. For the removal of these gel‐like components a gel separation unit for continual operation was constructed with a maximum capacity of 10 000 l/h. In practical application the apparatus removed 94% of the suspended matter extracted from the upper, middle and lower regions of the tank. Thus, the output of the filter station increased to 30 from 20 tons per day.
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