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    Comparative Evaluation of Bio-Hydrogen Production From Cheese Whey Wastewater Under Thermophilic and Mesophilic Anaerobic Conditions
    (Taylor & Francis Inc, 2009) Azbar, N.; Dokgoez, F. T.; Keskin, T.; Eltem, R.; Korkmaz, K. S.; Gezgin, Y.; Akbal, Z.; Oencel, S.; Dalay, M. C.; Goenen, C.; Tutuk, F.
    Hydrogen production from cheese whey wastewater via dark fermentation was conducted using mixed culture under mesophilic (36C 1) and thermophilic (55C 1) conditions, respectively. The hydrogen yields and specific hydrogen production rates were found as follows: mesophilic: 9.2 mmol H2 /g COD (chemical oxygen demand) and 5.1 mL H2 /g VSS h; thermophilic: 8.1 mmol H2 / g COD and 1.1 mL H2 /g VSS h. The reaction mixture for the mesophilic condition was composed of acetate (0.3-14.7%) and iso-butyrate (85-98%), plus other volatile fatty acids. On the other hand, the reactor mixture for the thermophilic condition was composed of acetate (1-43%) and iso-butyrate (29-46%).