RESUMO
Biohydrogen production in an anaerobic fluidized granular bed bioreactor was strongly dependent on temperature and effluent recycle rates. At 45 °C as the effluent recycle rate was increased from 1.3 to 3.5 L/min, the total H2 output for the bioreactor increased from 10.6 to 43.2 L/h. Volumetric H(2) productivity also increased from 2.1 to 8.7 L H2/L/h. At 70°C as the effluent recycle was increased from 1.3 to 3.5 L/min, the total H2 output for the bioreactor increased from 13.8 to 73.8L/h. At 70 °C volumetric H(2) productivities increased from 2.8 to 14.8L H2/L/h as the effluent recycle rate was increased from 1.3 to 3.5 L/min. At 45 °C % H2 was 45% and reached 67% at 70 °C. Maximum hydrogen yields at 45 °C were 1.24 and 2.2 mol H2/mol glucose at 70 °C.
