Fig. 3. Elemental Se (Se^o) in anaerobic granular sludge incubated with 0.5 mM selenate and (a) 20 mM lactate and (b) 20 mM ethanol (30°C; pH 7.5). (c) Red Se^o and biomass in Eerbeek enrichment and (d) microorganisms in Eerbeek enrichment (mixed culture). Color change and formation of red Se^o in the enrichment culture supplemented with (e) 10 mM selenate and 20 mM lactate (pH 7.5, 30°C).