PRETREATMENT METHOD OF TUBER RAW MATERIALS

摘要

The present invention relates to a pretreatment method of tuber raw materials comprising: delivering tuber raw materials to a raw material sieving machine, and performing a sieving operation on the tuber raw materials to make the oversize materials be tuber blocks with impurities such as gravel having been removed; delivering the tuber blocks into a tuber block crusher to crush them, the undersize material being tuber powder enriching impurities such as gravel; mixing the tuber powder with a certain amount of water and liquefied enzymes in a primary liquefaction plant to perform a liquefaction operation so as to convert the starch in the tuber powder enriching impurities such as gravel into water-soluble reducing sugars such as glucose and polysaccharide; performing a solid-liquid separation on the liquefied mash obtained by the primary liquefaction operation to remove the mass of solid materials such as gravel and fibres in the liquefied mash; mixing the clear liquid discharged by the solid-liquid separation device with the tuber powder from the tuber block crusher; and performing a second liquefaction operation in a secondary liquefaction plant to obtain liquefied mash meeting the requirements of downstream production. This thoroughly solves the problems which occur when using tuber raw materials to produce biological products due to the presence of many impurities, for example, the production device can not run stably and efficiently for a long period, and problems of high energy consumption and material consumption.