Nettie,
It really depends on what quality of water you are allowed to discharge, will you be discharging to a trade waste or sewer system? If that is the case you may just get away with solids Seperation using a baffled interceptor tank and then pH correcting to be within discharge limits. If you are being charged for BOD and other things you may need to look at an advanced treatment process, using a DAF and or a biological treatment process.
If you are not discharging to a trade waste point and need to be able to have acceptable water to discharge for irrigation or via septic style system, a biological treatment plant could be the way to go. You could even have a holding tank and use one or more of these BIogill membrane bioreactor towers (
https://www.biogill.com/projects/food-beverage/binnorie-dairy/). With the right bacteria you could remove BOD and be able to then discharge through a septic system if set up correctly.
Mathew
Send me a private message if you would like me to fi d out some system specific information on the BIogill towers for you, we deal with the, for work and could ask some questions and find out who the most appropriate contact person would be for you to deal with in your location.