Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5147935 | International Journal of Hydrogen Energy | 2017 | 11 Pages |
Abstract
The aim of this study was to evaluate the influence of C/P and C/N ratios on the production of hydrogen and ethanol in four anaerobic fluidized bed reactors: R1 (C/N = 100), R2 (C/N = 150), R3 (C/N = 200), and R4 (C/N = 250). The hydraulic retention time (HRT) was maintained at 2 h, and the C/P ratios varied from 300 to 1100. Reactors were filled with grounded tire and fed with synthetic substrate containing glucose (5000 mg Lâ1). The effluent pH was around 3.7. The highest values for hydrogen yield (HY) and hydrogen production rate (HPR) were obtained at a C/P = 700 ratio in all reactors. The best performance was achieved at R3 (C/N = 200): HY of 0.76 mol H2 molâ1 glucose and HPR of 0.70 L hâ1 Lâ1. The highest value for ethanol yield was obtained at C/P = 700 in R1 (1.5 mol EtOH molâ1 glucose). Ethanol- and hydrogen-producing fermenters, such as Ethanoligenens sp. and Clostridium sp. were identified by molecular analysis. Lactobacillus sp. was also identified in this study.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Mariana Fronja Carosia, Cristiane Marques dos Reis, Isabel Kimiko Sakamoto, Maria Bernadete Amâncio Varesche, Edson Luiz Silva,