The performance of inclined plug-flow reactor of 0.15 m(3) for hydrogen generation from kitchen waste using 100 degrees C heat treated biogas plant slurry as inoculum under solid phase anaerobic digestion was studied. The reactor pH stabilized at 5.6 after 21 days of its operation. 40% VS degradation was obtained and it generated 72 mL H(2)/gVS added. The soluble metabolites in the reactor were predominantly butyric acid (45-50%), acetic acid (20-30%) and propionic acid (10-20%). (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.