TREATMENT WASTEWATER FROM CASSAVA PROCESSING PLANTS BY ANAEROBIC PROCESS WITH PHASES SEPARATION

  • Celia Regina Granhen Tavares UEM
  • Brasília Maria Lofiego Sampaio UEM
  • Fábio Luiz Monteiro Garcia UEM
  • Fábio Lupreato Marques UEM

Abstract

The physical separation of the acidogenic and methanogenic phases constitutes a proposal to reduce the problem of instability in the anaerobic digestion of wastewater of the cassava processing. This experiment was carried out in two anaerobic reactors. The acidogenic reactor was inoculated with anaerobic sludge taken from wastewater treatment station of Maringá, State of Paraná. The five-liter reactor was operated with a four-day hydraulic retention time. Its affluent concentration was 3,000, 4,500 and 6,000 mg/L and 15 mg/L of COD and free cyanide respectively. The 20-liter methanogenic reactor was filled with 2x2cm pieces of dry bamboo and inoculated with methanogenic sludge. This reactor was run with a four-day hydraulic retention time and its affluent was the effluent of the acidogenic reactor. The results showed an effective reduction of toxic compounds such as 97% of COD, 87% of volatile acidity and 96.7% of free cyanide.

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Author Biography

Celia Regina Granhen Tavares, UEM
Possui graduação em Engenharia Química pela Universidade Federal do Pará (1978), mestrado em Engenharia Química pela Universidade de São Paulo (1982), doutorado em Engenharia Química pela Universidade Federal do Rio de Janeiro (1992) e pós-doutorado em Engenharia Ambiental pela Université Montpellier II (1997-1998). Atualmente é professora associado nível c da Universidade Estadual de Maringá. Tem experiência nas áreas de Engenharia Química e Engenharia Sanitária e Ambiental, com ênfase em Técnicas Avançadas de Tratamento de Efluentes, Tratamento Biológico de Efluentes Líquidos, Gestão e Tratamento de Resíduos Sólidos e Gererenciamento e Monitoramento de Recursos Hídricos, atuando principalmente nos seguintes temas: Leito Fluidizado, Biossorcao, Adsorção, Resíduo Sólido, Foto-oxidação catalítica, Processo de Tratamento com Reagente Fenton e Processos com Membranas. Currículo Lattes
Published
2008-07-28
Section
Engineering Chemistry