Modeling of Biogas Reactors

200 6 Modeling of Biogas Reactors
a)
b)
Fig. 6.37 Experiments digesting
wastewater of bakers’ yeast production
at different pressures (pressure
difference to normal pressure)
in a stirred tank reactor (active volume
16 L). Continuous feeding of
wastewater (TOC = 12 g L –1 , concentration
of sulfate 2.8 g L –1 ).
Pressure was kept constant
b 2500 Pa within a certain time
interval to achieve steady state conditions.
Fig. 6.38a, b Comparison between
model calculation and experiment.
a pH as a function of the absolute
pressure, b H 2S content in the biogas
as a function of the absolute
pressure.