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TitleAnaerobic biodegradability of category 2 animal by-products : methane potential and inoculum source
Author(s)Pozdniakova, T. A.
Costa, J. C.
Santos, R. J.
Alves, M. M.
Boaventura, Rui A. Rocha
KeywordsAnimal by-products
Anaerobic digestion
Solids concentration
Gompertz modelInoculum source
Gompertz model
Inoculum source
Issue date2012
JournalBioresource Technology
Abstract(s)Category 2 animal by-products that need to be sterilized with steam pressure according Regulation (EC) 1774/2002 are studied. In this work, 2 sets of experiments were performed in mesophilic conditions: (i) biomethane potential determination testing 0.5%, 2.0% and 5.0% total solids (TS), using sludge from the anaerobic digester of a wastewater treatment plant as inoculum; (ii) biodegradability tests at a constant TS concentration of 2.0% and different inoculum sources (digested sludge from a wastewater treatment plant; granular sludge from an upflow anaerobic sludge blanket reactor; leachate from a municipal solid waste landfill; and sludge from the slaughterhouse wastewater treatment anaerobic lagoon) to select the more adapted inoculum to the substrate in study. The higher specific methane production was of 317 mL CH4 g−1 VSsubstrate for 2.0% TS. The digested sludge from the wastewater treatment plant led to the lowest lag-phase period and higher methane potential rate.
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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