title: Optimization of biological hydrogen production for anaerobic co-digestion of food waste and wastewater biosolids.
abstract: Batch anaerobic co-digestion studies were conducted using 21 mixtures (M1-M21) of food waste (FW), primary sludge (PS), and waste activated sludge (WAS) at 37°C and an initial pH of 5.5±0.2. The results showed that co-digestion of FW and sludges had a positive impact on the hydrogen production. The maximum hydrogen yields by co-digestion of FW+PS, FW+WAS, and FW+PS+WAS were achieved at volumetric ratios of 75:25, 75:25, and 80:15:5, respectively, with corresponding optimal COD/N mass ratios of 26, 31 and 30, respectively. Furthermore, the synergistic effect of co-digestion was proven and quantified: the measured hydrogen productions were higher than the sums of the hydrogen productions calculated from each fraction, and the highest percentage increase above the calculated value of 101%, was achieved in the FW+PS+WAS mixture (80:15:5).
authors: Civil and Environmental Engineering Department, University of Western Ontario, London, ON, Canada N6A 5B9.
authors: Peiqing
authors: P
authors: Zhou
authors: Elsayed
authors: E
authors: Elbeshbishy
authors: George
authors: G
authors: Nakhla
mesh_terms: D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D005735:Garbage; D006859:Hydrogen / Q000378:metabolism*; D008954:Models, Biological; D012722:Sewage
chemical_list: D056804:Biofuels; D012722:Sewage; D006859:Hydrogen