Methanization potential of anaerobic biodigestion of solid food waste/Potencial de metanizacao da biodigestao anaerobia de residues solidos alimentares

Anaerobic biodigestion of solid and semi-solid wastes has been widely used for the treatment of these residues and methane production; however, during the process (more specifically in the acidogenic phase), there is a tendency of pH reduction, an unfavorable condition to methanogenic bacteria. Thus...

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Bibliographic Details
Published in:Revista brasileira de engenharia agrícola e ambiental 2018-01, Vol.22 (1), p.69
Main Authors: de Oliveira, Lais R.G, Filho, Derovil A. dos Santos, Vasconcelos, Kaline C, de Lucena, Talita V, Juca, Jose F.T, de M.S. Santos, Andre F
Format: Article
Language:English
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Summary:Anaerobic biodigestion of solid and semi-solid wastes has been widely used for the treatment of these residues and methane production; however, during the process (more specifically in the acidogenic phase), there is a tendency of pH reduction, an unfavorable condition to methanogenic bacteria. Thus, the present work aims to evaluate the methanization potential of an agroindustrial anaerobic granular sludge (AIS) from UASB (Upflow Anaerobic Sludge Blanket) reactor, individually and biodigested with food waste (FW) from the University Restaurant of the Federal University of Pernambuco with buffering agent (AIS + FW + b) and without it (AIS + FW). After the laboratory tests, the AIS + FW + b configuration obtained a cumulative methane production approximately six times greater than that of AIS + FW, and approximately twice that of the inoculum alone (AIS). Key words: biodegradation methane pH inoculum A biodigestao anaerobia de residuos solidos e semissolidos vem sendo bastante utilizada para o tratamento destes residuos e producao de metano; no entanto, durante o referido processo (mais especificamente na fase acidogenica), existe uma tendencia de reducao do pH, condicao desfavoravel as bacterias metanogenicas. Desta forma, o presente trabalho visa avaliar o potencial de metanizacao isolado de um lodo granular anaerobio agroindustrial (LAI), proveniente de reator UASB (Upflow Anaerobic Sludge Blanket), bem como biodigerido com residuo alimentar (RA) oriundo do Restaurante Universitario da Universidade Federal de Pernambuco com agente tamponante (LAI + RA + t) e sem adicao do mesmo (LAI + RA). Apos a realizacao de ensaios laboratoriais, a configuracao LAI + RA + t obteve uma producao acumulada de metano cerca de seis vezes maior em relacao a producao da composicao LAI + RA, e de aproximadamente duas vezes maior que a do inoculo isolado (LAI). Palavras-chave: biodegradacao metano pH inoculo
ISSN:1415-4366
DOI:10.1590/1807-1929/agriambi.v22n1p69-73