In summary, the hot grinding process with accurate
temperature control used in our laboratory was effective in
reducing soy odor. Cold grinding also exhibited an advantage
over ambient grinding. In addition, the two-phase UHT with
vacuum evaporation could effectively remove the selected
volatiles to a large extent due to the use of vacuum twice that
helped remove not only water but also volatile compounds in
the product. As expected, proper combinations of grinding and
heating methods are desirable to tackle the soy odor problem.
It should be noted that in the meantime, cold and hot grinding
could reduce the protein recovery and solid yield. In addition,
other properties of soymilk might be affected by various
treatments, such as isoflavone profile, trypsin inhibitor activity,
and antioxidant capacity.