The aerobic biotrickling filter (BTF1) is a conventional countercurrent
biotrickling filter, in which the gas phase circulates upstream,
counter-currently with the liquid phase. BTF1 was operated
for more than 1 year under steady-state conditions, treating
a reference synthetic biogas containing 2000 ppmv of H2S at an
EBRT of 180 s (LR of 52.5 gS-H2S m3 h1). Unspecific inoculation
was carried out with aerobic sludge from a local municipal wastewater
treatment plant located in Manresa, Spain. BTF1 was located
at the Universitat Autonoma de Barcelona, Spain. The schematic of
the reactor is shown in Fig. 1. Reactor diameter is 7.14 cm and the
packed bed volume is 2 L; metallic Pall rings (AISI 316), 10 mm
diameter were used as packing material.