Anaerobic biodegradability of category 2 animal by-products : methane potential...

• Autor(es): Pozdniakova, T. A. ; Costa, J. C. ; Santos, R. J. ; Alves, M. M. ; Boaventura, Rui A. Rocha
• Data: 2012
• Identificador Persistente: http://hdl.handle.net/1822/22328
• Origem: RepositóriUM - Universidade do Minho
• Assunto(s): Animal by-products; Anaerobic digestion; Solids concentration; Gompertz modelInoculum source
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

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.