The coenzyme F420 in the reaction zone I and II was 0.35 –
0.42 lmol/g and 0.87 – 0.96 lmol/g, respectively. The coenzyme
F420 in the reaction zone II was twice than that in the
reaction zone I, indicating a stronger activity of the methanogens
in the reaction zone II. It indicated that the integrated
two-phase anaerobic reactor separated the phases.