Fig. 2 – Gas production (Vg, volume of gas) from synthetic
fermentation effluent: (A) wastewater inoculum acclimated
to synthetic effluent (FEI-Synthetic); (B) wastewater
inoculum pre-acclimated to individual substrates before
treatment of synthetic effluent (SSI-Synthetic).
average of 21 16% over the first five cycles with the duplicate
reactors.
The use of the actual fermentation effluents produced
comparable or slightly lower amounts of gas per batch cycle
than when the reactor was fed with synthetic effluent
(Table 2). There was 105 17 mL of gas produced using the
cellobiose fermentation effluent, and 97 16 mL with corn
stover lignocellulose fermentation effluent. The percent of
hydrogen in the gas, however, declined compared to the
synthetic effluent. There was 69 4% H2 in the gas from the
cellobiose effluent, and 69 6% H2 with the lignocellulose