TY - JOUR
AU - Gomez, Xiomar
AB - The production of hydrogen from food wastes was studied in a two‐stage (dark fermentation‐digestion) process under mesophilic conditions. The effect of a recycling stream, from the methanogenic phase to the fermentation phase, over H2 production and alkali consumption was evaluated in a semicontinuous fermentation process. The cases of no‐recycling, direct recycling, and membrane permeate recycling of methanogenic supernatant (using an ultrafiltration and nanofiltration membrane) were evaluated. Adding a recycling stream from a methanogenic reactor to the hydrogen‐producing reactor significantly reduced the need of external alkali addition for pH control, up to 52%. The performance of the hydrogen‐producing reactors receiving the recycling stream was similar in all cases tested, with values of specific hydrogen production of about 30 mL g−1 VSadded. This value was also similar to that one obtained from the no‐recycling configuration. The use of a membrane pretreatment stage proved to be not necessary. Operating conditions established in the fermentation stage were enough to avoid any detrimental effect associated to methanogenic microflora predominance. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 227–233, 2015
TI - Effect of methanogenic effluent recycling on continuous H 2 production from food waste
JF - Environmental Progress & Sustainable Energy
DO - 10.1002/ep.11980
DA - 2015-01-01
UR - https://www.deepdyve.com/lp/wiley/effect-of-methanogenic-effluent-recycling-on-continuous-h-2-production-K2y03oA50u
SP - 227
EP - 233
VL - 34
IS - 1
DP - DeepDyve
ER -