Biohydrogen production from Tequila vinasses in an anaerobic sequencing batch reactor: Effect of initial substrate concentration, temperature and hydraulic retention time
2010
Buitrón, G (Germán) | Carvajal, Carolina
The effect of the temperature (25 and 35°C), the hydraulic retention time, HRT, (12 and 24h) and initial substrate concentration on hydrogen production from Tequila vinasse was studied using a sequencing batch reactor. When 25°C and 12-h HRT were applied, only insignificant biogas quantities were produced; however, using 24h of HRT and temperatures of 25 and 35°C, biogas containing hydrogen was produced. A maximum volumetric hydrogen production rate of 50.5mLH₂ L⁻¹ h⁻¹ (48mmolH₂ [formula removed] d⁻¹) and an average hydrogen content in the biogas of 29.2±8.8% were obtained when the reactor was fed with 3gCODL⁻¹, at 35°C and 12-h HRT. Methane formation was observed when the longer HRT was applied. Results demonstrated the feasibility to produce hydrogen from this waste without a previous pre-treatment.
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