Thermophilic Biogas Upgrading via ex Situ Addition of H<sub>2</sub> and CO<sub>2</sub> Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste
Patrick T. Sekoai, Nicolaas Engelbrecht, S.P. du Preez, Dmitri Bessarabov
Abstract
concentrations of 92-97 vol % and biogas volumetric production rates of 4954-6605 NmL/L.d were obtained from a batch reactor of 3 L working volume. Feedstock characterization, pH monitoring, and the carbon-to-nitrogen ratio were critical parameters to evaluate during biogas upgrading experiments. In this work, the usefulness of agro-municipal substrates is highlighted by producing high-purity biomethane-an energetic chemical to facilitate renewable energy conversion, which supports various end-use applications. This process therefore provides a solution to renewable energy storage challenges and future sustainable and green energy supply.
Topics & Concepts
BiogasRenewable energyBioconversionWaste managementRaw materialEnvironmental scienceBioenergyMunicipal solid wasteManureBiofuelRenewable resourcePulp and paper industryBiodegradable wasteChemistryEngineeringFermentationAgronomyBiologyElectrical engineeringFood scienceOrganic chemistryAnaerobic Digestion and Biogas ProductionCarbon Dioxide Capture TechnologiesCatalysts for Methane Reforming