MODIFICATION OF CORN WET-MILLING STEEPING CONDITIONS TO REDUCE ENERGY CONSUMPTION

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Abstract
Laboratory corn wet-milling experiments were conducted with modified operating conditions. Mill-starch yield obtained from corn steeped at reduced steep solution volume was comparable to normal operation as long as the absolute amount of steeping agent, SO2, remained the same. Increasing the SO2 concentration or removing the mass transfer barriers between the endosperm and the steep solution by degerminating between 2 steeping periods improved mill-starch yield. These modifications have potential for saving energy consumed in steeping and in concentrating residual steep solution.

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