Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7078450 | Bioresource Technology | 2014 | 7 Pages |
Abstract
The increasing concentration of carbon dioxide (CO2) in the atmosphere and the stringent greenhouse gases (GHG) reduction targets, require the development of CO2 sequestration technologies applicable for the waste and wastewater sector. This study addressed the reduction of CO2 emissions and enhancement of biogas production associated with CO2 enrichment of anaerobic digesters (ADs). The benefits of CO2 enrichment were examined by injecting CO2 at 0, 0.3, 0.6 and 0.9Â M fractions into batch ADs treating food waste or sewage sludge. Daily specific methane (CH4) production increased 11-16% for food waste and 96-138% for sewage sludge over the first 24Â h. Potential CO2 reductions of 8-34% for sewage sludge and 3-11% for food waste were estimated. The capacity of ADs to utilise additional CO2 was demonstrated, which could provide a potential solution for onsite sequestration of CO2 streams while enhancing renewable energy production.
Keywords
TPADdeionizedVFACCSC∗Methane enhancementWWTPSAOGHGSCODUASBKLAvolatile fatty acidSyntrophic acetate oxidationdissolved oxygenanalysis of varianceANOVACarbon dioxide sequestrationWastewater treatment plantTotal solidsvolatile solidsCarbon capture and storageFood wasteSewage sludgesoluble chemical oxygen demandAnaerobic digestionAnaerobic digesterUpflow anaerobic sludge blanketGreenhouse gases
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Y. Bajón Fernández, A. Soares, R. Villa, P. Vale, E. Cartmell,