Hydrogen production from cassava in anaerobic fixed bed reactor

Authors

  • Andressa Nóe Nunes Universidade Federal de Alagoas
  • Antonio Pedro de Oliveira Netto Universidade Federal de Alagoas

DOI:

https://doi.org/10.32358/rpd.2016.v2.161

Keywords:

Cassava, bioreactor, metabolites.

Abstract

The use of agro-industrial waste for the production of hydrogen has shown a very promising trend, because its improper disposal creates environmental problems. Thus, the objective of the research was to evaluate the production of hydrogen from cassava processing residue in anaerobic fixed bed reactor operated under progressively increasing organic loading rate (OLR) of 12 kg.m-3.d-1 a 96 kg.m-3.d-1. The support material for the adhesion of biomass was expanded clay with a diameter between 2.80 - 3.35 mm, and the reactor was inoculated with anaerobic sludge pre heat-treated. The reactor was operated for 250 days and the progressive increase of ORL was carried out keeping the COD affluent around 4000 mg. L-1, throughout the operation of the reactor and varying the hydraulic retention time (HRT) of 8 hours to 1 hour. The maximum yield of hydrogen was obtained in HRT of 2h (1.66 mol H2 / mol glucose). The soluble metabolites present during operation of the reactor were acetic acid (30.72% to 84.9%), butyric acid (2.89% to 29.13%), propionic acid (3.98 to 13.09%), caproic acid (0.55% and 22.79%) and ethanol (3.64% to 10.46%). Methane production was observed along with hydrogen in all operating phases.

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Author Biographies

Andressa Nóe Nunes, Universidade Federal de Alagoas

Graduação em Química Bacharelado e Metrado em Recursos Hídricos e Saneamento pela Universidade Federal de Alagoas

Antonio Pedro de Oliveira Netto, Universidade Federal de Alagoas

Possui graduação em Engenharia Civil pela Universidade Federal de Alagoas e Pós-graduação (Mestrado e Doutorado) pela Escola de Engenharia de São Carlos (USP). Tem experiência na área de Engenharia Ambiental, com ênfase em tratamento de águas residuárias, atuando principalmente nos seguintes temas: licenciamento ambiental, projeto e execução de estações de tratamento de água e esgoto, tratamento combinado anaeróbio-aeróbio de esgoto sanitário, reator de leito fixo operado de modo contínuo e avaliação de projetos de melhorias habitacionais e sanitárias.

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Published

2016-12-31

How to Cite

Nunes, A. N., & Netto, A. P. de O. (2016). Hydrogen production from cassava in anaerobic fixed bed reactor. Revista Produção E Desenvolvimento, 2(3), 54–63. https://doi.org/10.32358/rpd.2016.v2.161

Issue

Vol. 2 No. 3 (2016): SEPTEMBER-DECEMBER

Section

Territorial Affairs

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