| Autor: |
Ofon UA; Department of Microbiology, University of Uyo, Uyo, Nigeria., Ndubuisi-Nnaji UU; Department of Microbiology, University of Uyo, Uyo, Nigeria., Shaibu SE; Department of Chemistry, University of Uyo, Uyo, Nigeria.; International Center for Energy and Environmental Sustainability Research, University of Uyo, Uyo, Nigeria., Fatunla OK; Department of Microbiology, University of Uyo, Uyo, Nigeria.; International Center for Energy and Environmental Sustainability Research, University of Uyo, Uyo, Nigeria., Offiong NO; International Center for Energy and Environmental Sustainability Research, University of Uyo, Uyo, Nigeria.; College of New Energy & Environment, Jilin University, Changchun, People's Republic of China. |
| Abstrakt: |
Anaerobic codigestion (AcD) of agroindustrial residues was investigated. Granular sludge from bench-scale bioreactors digesting different manure were acclimated and recycled as microbial seed sludge to demonstrate inoculum-type influence on digestion performance. The biomethane potential (BMP) assay was operated for 30 days at 40 ± 2 °C in batch-type laboratory-scale reactors (100 mL). In inoculum amended reactors, codigestion showed significant, yet distinctive, biomethanation than monodigestion with a 5-fold increase ( p < 0.05) in average biogas (248.3 ± 5.30 mL gVS -1 ) and CH 4 yield (207.5 ± 4.15 mL gVS -1 ). The pH, soluble chemical oxygen demand (sCOD) and volatile fatty acids (VFAs) concentrations were within limits for stable AcD process with elevated total solids (TS) and volatile solids (VS) removal efficiencies. This study reinforces advancements in the recycling of digestate in biodigesters and suggests the appropriate selection of inoculum, preferably cow manure, to essentially boost methane production from these wastes. |
