In winemaking, odors are caused by septic conditions. But that can be prevented by maintaining aerobic conditions with dissolved oxygen concentrations of 0.5 mg/l or less. An oxygen uptake rate (OUR) can be used to estimate the required oxygen transfer rate. Typical OUR values for odor control are between 0.5 mg/l-hr and 2.0 mg/l-hr (see Test Data below). The oxygen transfer requirement is calculated by multiplying the mass of the liquid by the OUR.


