Hydrothermal pretreatment of poultry litter for biogas production.
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Data
2023
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Resumo
Hydrothermal pretreatment (HPT) allows the solubilization of the hemicellulose, leading to increased
biodegradability for microorganisms. This paper presents a study based on the evaluation of the variables time
(12 to 60 min), temperature (80 to 200°C), and solid/liquid ratio (4 to 8 g mL-1) for the HPT (autohydrolysis) of
synthetic poultry litter (rice straw: poultry manure 1:5) using the Doehlert matrix. Twelve HPT conditions followed
by anaerobic digestion were evaluated with a focus on methane production. Firstly, tests were conducted to evaluate
biogas production in a single stage in a single reactor, where both the acidogenic and methanogenic phases occur.
Subsequently, tests were conducted to evaluate biogas production in a two-stage, consisting of separating hydrogen
and methane production phases. The best performance of the biochemical potential of methane was the conditions
6 (24 min, 120 °C, and solid-liquid ratio = 4) in a single stage and 3 (48 min, 160 °C, and SLR = 8) in a two-stage,
producing 255.6 and 277.6 NmL CH4
gVS-1, respectively. Using the desirability criteria, two hydrothermal pretreatment
(HPT) conditions were evidenced/ condition 1 in two stages (12 min, 80 °C, and SLR = 4)- (D1-2S) and condition
two in two stages (12 min, 98 °C, and SLR = 4) - (D2-2S) showed high methane production, 248.9 and 249.3NmL
CH4
∙gVS-1, respectively.
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Chicken manure, Autohydrolysis, Digestão anaeróbia
Citação
OLIVEIRA, M. P. de et al. Hydrothermal pretreatment of poultry litter for biogas production. Revista Brasileira de Engenharia Agricola e Ambiental, v. 27, n. 11, p. 873-881, nov. 2023. Disponível em: <https://www.scielo.br/j/rbeaa/a/h8Ysj8whJCSXJhf8Nwnd8Yv/>. Acesso em: 01 ago. 2023.