EFFECT OF FIBER DEGRADING ENZYMES ON WET-MILLING AND STARCH PROPERTIES OF DIFFERENT TYPES OF SORGHUMS AN MAIZE

A factorial experiment (4 x 2 x 2) was carried out to study the effect of a fiber degrading enzyme complex on starch yield, SO2 steeping tim e and starch properties of normal red sorghum (RS), heterowaxy (WHWx) waxy (WWx) white sorghums compared to regular yellow maize (YM). Starc h yields and total starch recovery for the sorghums ranged from 53-64% and 70-85%, respectively. Sorghum starch recovery values were signifi cantly lower (p < 0.05) than maize (66% starch yield and 88% recovery) . However, the WWx yielded more starch with lower protein and ash cont ents (P < 0.05) than the RS and WHWx sorghums. In the RS, the fiber de grading enzymes reduced steep time while owing the same starch recover y. The WWx starch required lower temperature to initiate gelatinizatio n and had higher peak viscosities and lower retrogradation than the ot her starches. The WHWx starch had intermediate viscoamylograph propert ies between the regular and waxy starches.