Most who brew compost tea are familiar with this process, and it makes the most sense for growers not using compost tea daily. Batch brewing is conducted by brewing ingredients for 12-48 hours in order to use the entire solution and repeat over time. However, Garden Centers and intentioned Growers can gain great advanatages using perpetual brewing techniques.
Common knowledge on the biological progression of batch brewing is that bacteria wake up first within the first 12 hours, then fungi over the 12-24 hour period. After this protozoa and nematodes begin to dominate.
Batch brewing for more than 48 hours is not recommended, as after this time microbes run out of food sources and begin to cannibalize, effectively de-stabalizing the soil food web.