Figure 4From: Effects of steam pretreatment and co-production with ethanol on the energy efficiency and process economics of combined biogas, heat and electricity production from industrial hempConfigurations of anaerobic digestion. Configurations of AD after ethanol production in (A) Scenario Et-AD, and (B) Et-AD+. CSTR: continuous stirred tank reactor, UASB: upflow anaerobic sludge blanket.Back to article page