Recycling anaerobic digestate enhances the co-digestion potential of agro-industrial residues: influence of different digestates as sources of microbial inoculum

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...

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Bibliographic Details
Published in:Environmental technology 2022-12, Vol.43 (28), p.4472-4483
Main Authors: Ofon, Utibe A., Ndubuisi-Nnaji, Uduak U., Shaibu, Solomon E., Fatunla, Opeyemi K., Offiong, Nnanake-Abasi O.
Format: Article
Language:English
Subjects:
Agricultural wastes
anaerobic codigestion
Anaerobic microorganisms
Animal wastes
Biogas
biomethanation
Bioreactors
brewer's spent grain
Cattle manure
Chemical oxygen demand
Digesters
Fatty acids
Inoculum
Manures
Methane
Microorganisms
palm oil mill effluent
Reactors
Recycled digestate
Recycling
Residues
Sludge
Sludge digestion
Volatile fatty acids
Volatile solids
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Summary: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 
ISSN:0959-3330
1479-487X
DOI:10.1080/09593330.2021.1952313