Biohydrogen Production via Dark Fermentation with Pig Manure and Glucose Using pH‐Dependent Feeding
Tobias Weide, Roberto Eloy Hernández Regalado, Elmar Brügging, Marc Wichern, Christof Wetter
Abstract
Abstract Process controls for mesophilic dark fermentation using a pH‐dependent feeding strategy without NaOH addition were examined. One reactor utilizing microorganism holdback and two continuously stirred‐tank reactors (CSTRs) with the same volume were employed. These were fed with pig manure and glucose as cosubstrates. Different hydraulic retention times were applied. The target pH was 5.5 within a limited range and controlled by varying organic loading rate. When the pH target interval was exceeded, the hydrogen production rate ( HPR ) decreased, and CH 4 was produced. A pH below the target interval had positive effects on the HPR .
Topics & Concepts
BiohydrogenMesophileChemistryFermentationHydraulic retention timeDark fermentationManureVolume (thermodynamics)Continuous stirred-tank reactorHydrogen productionWastewaterPulp and paper industryBiochemistryBacteriaAgronomyEnvironmental engineeringCatalysisBiologyEnvironmental scienceGeneticsPhysicsEngineeringPhysical chemistryQuantum mechanicsAnaerobic Digestion and Biogas ProductionMicrobial Fuel Cells and BioremediationBiofuel production and bioconversion