In general, a DAF (Dissolved ...
Published by David Cifuentes, Edible Fats and Oils, Industry Manager at Flottweg Separation Technoloy
In general, a DAF (Dissolved Air Flotation is a good first step to remove the fats. Depending on the incoming concentration, even a 2-stage DAF system could be used. (Effluent from the 1st DAF feeds a 2nd DAF). The fats from this process can be a revenue stream, as they have uses in other applications. After that, it's a little less clear. Are you direct discharging or going to a municipality, etc. In general, the smaller the system, the more economical will be aerobic systems. The larger the system, anaerobic starts to become competitive and has the advantages of lower odor and potential to produce methane which can be burned in a gas boiler, if you have one.