Tratamento de água residuária da bovinocultura com reator UASB operado à temperatura mesófila: novas abordagens para o setor de bioenergia

Autores/as

DOI:

https://doi.org/10.17765/2176-9168.2024v17n2e11994

Palabras clave:

Digestão anaeróbia, Biogás, Metano, Controle de poluição

Resumen

Métodos de engenharia devem ser constantemente atualizados para promover avanços construtivos, econômicos e sustentáveis. Neste estudo, novos dados sobre valorização energética e tratamento de águas residuárias de bovinos por meio de um reator UASB operado a 40°C foram obtidos. Foi aplicado um regime de alimentação semi-contínuo, com tempos de retenção hidráulica de 6, 5, 3 e 2 dias, e taxas de carga orgânica de 4, 5, 7 e 11 kg COD m-3 d-1. Foram registrados volumes de gás de até 1,5 m³ de biogás m-3 de reator d-1, com concentrações de metano variando entre 69% e 75%. Remoções eficientes de matéria orgânica de 60-80% (DQO total) e 50-75% (DQO solúvel) resultaram em rendimentos de metano de 0,16-0,18 m³ CH4 kg-1 de DQO total e 0,4-0,5 m³ CH4 kg-1 de DQO solúvel. Não ocorreu acúmulo de ácidos graxos voláteis em nenhuma etapa, e os valores de pH e alcalinidade permaneceram dentro da faixa ideal para o desenvolvimento do processo de digestão anaeróbica. O reator UASB demonstrou produção significativa de biogás e eficiência razoável na remoção de sólidos e matéria orgânica, indicando-o como uma nova opção para o tratamento de águas residuárias com alta concentração de poluentes com o benefício da produção de energia limpa.

Biografía del autor/a

Henrique Vieira de Mendonça, Universidade Federal de Juiz de Fora

Doutor em Ecologia pela UFJF. Professor do Programa de Pós-Graduação em Engenharia Agrícola e Ambiental da UFRRJ, Seropédica (RJ), Brasil.

Aderson Gomide Costa, UFRRJ

Doutor em Engenharia Agrícola pela UFV. Professor do Programa de Pós-Graduação em Engenharia Agrícola e Ambiental da UFRRJ, Seropédica (RJ), Brasil.

Jacob Santana, UFRRJ

Discente de Mestrado em Engenharia Agrícola e Ambiental da UFRRJ, Seropédica (RJ), Brasil.

Mônica Silva dos Santos, UFRRJ

Discente de Mestrado em Engenharia Agrícola e Ambiental da UFRRJ, Seropédica (RJ), Brasil.

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Publicado

2024-07-05

Cómo citar

Mendonça, H. V. de ., Costa, A. G. ., Santana, J., & Santos, M. S. dos . (2024). Tratamento de água residuária da bovinocultura com reator UASB operado à temperatura mesófila: novas abordagens para o setor de bioenergia. Revista Em Agronegócio E Meio Ambiente, 17(2), e11994. https://doi.org/10.17765/2176-9168.2024v17n2e11994

Número

Sección

Meio Ambiente