Hydraulic retention time (HRT) and SRT in anaerobic digestion
Hydraulic retention time (HRT) is the average time the liquid stays inside the digester; SRT is the time the biomass (the microorganisms) stays. In a conventional CSTR both coincide, but in advanced reactors (UASB, AnMBR) they are decoupled: they retain the biomass much longer than the liquid, which makes it possible to treat large flows […]