Akademik Veri Yönetim Sistemi
WASTE AND BIOMASS VALORIZATION, cilt.4, sa.3, ss.517-528, 2013 (SCI-Expanded, Scopus)
Diluted cheese whey (CW) solutions with different initial COD contents (4,800-25,000 mg l(-1)) were electro-hydrolyzed by application of constant DC voltage (3 V) for hydrogen gas production and COD removal. The highest cumulative hydrogen production (3,923 ml), hydrogen yield (1,719 ml H-2 g(-1) COD), hydrogen formation rate (699 ml d(-1)), and percent hydrogen (99.2 %) in the gas phase were obtained with the highest initial COD of 25,025 g COD l(-1) with an energy conversion efficiency of 90.3 %. Hydrogen gas production in water and cheese whey controls were negligible indicating no significant H-2 gas production by electrolysis of water and fermentation of cheese whey. Percent COD removals were between 18 and 20 % for initial CODs above 11,500 mg l(-1). Major COD removal mechanism was anaerobic fermentation of carbohydrates producing volatile fatty acids (VFA) and CO2. Hydrogen gas was produced by reaction of (H+) ions released from VFAs and electrons provided by DC current. Electro-hydrolysis of CW solution was proven to be an effective method of H-2 gas production with simultaneous COD removal.