Can oil and protein extracts be recovered from corn germ?
Oil and proteins were successfully recovered from corn germ by a biorefinery scheme. Oil extraction yield and TPC of oils were influenced by the polarity of solvents. The protein content of recovered extracts ranged from 20 to 48%. The functionality of protein extracts depended on the defatting pretreatment.
How to extract oil from corn germ during flour processing?
This work aimed the recovery of oil and protein fractions from corn germ (CG) generated as a by-product during flour processing. Several oil extraction techniques were investigated: hexane at room temperature, hexane at 45 °C, supercritical carbon dioxide (Sc-CO 2) and Soxhlet with hexane and ethanol.
Is corn kernel oil a recovery germ?
Typically, the crude oil of corn kernel (4%) is almost stored in corn germ and the entire germ mainly contains oil (48%), protein (13%), and starch (12%). However, the recovery germ composition in oil (18%?41%), protein (12%?21%) and starch (6%?21%) is also influenced by growing conditions, genetic factors, and isolation methods [33 ].
What is corn germ oil?
Corn germ oil is a by-product of the corn oil milling process. Most corn that is harvested is used as feed but the proportion of the corn that is milled is increasing because of bioethanol production. During the wet milling process, the germ is isolated from the starch using cyclone separators, washed, and dried.