Journal of Environmental Engineering · 2000 · 279 citations · 17 references
EngineeringChemical EngineeringEnvironmental EngineeringReaction EngineeringSolid Waste ManagementWaste ManagementAnaerobic DigestionAnaerobic MetabolismBioprocess KineticsFermentation KineticsOrganic Waste ManagementWaste TreatmentAnaerobic Microbial ProcessesFirst-order Degradation KineticsFirst-order KineticsHydrolysis KineticsHydrolysis ReactionsPh-dependent RegulationSolid Waste TreatmentVolatile Fatty Acids
The anaerobic hydrolysis rate of organic solid waste was studied at fixed volatile fatty acid (VFA) concentrations ranging from 3 to 30 g COD/L and fixed pH values between 5 and 7. For separate control of both VFA and pH, a special completely mixed reactor was designed. In this way, it was possible to distinguish between the inhibitory effects of pH, total VFA, and undissociated VFA on anaerobic hydrolysis. It was shown that hydrolysis of the organic solid waste followed first-order kinetics. Using a statistical analysis, it was found that the hydrolysis rate constant was pH dependent but was not related to the total VFA and undissociated VFA concentrations.
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