Sulfate and metal removal from acid mine drainage using sugarcane vinasse as electron donor: Performance and microbial community of the down-flow structured-bed bioreactor

Autor(es)

Nogueira, Elis Watanabe ^[1] ; de Godoi, Leandro Augusto Gouvea ^[1] ; Yabuki, Lauren Nozomi Marques ^[2] ; Brucha, Gunther ^[3] ; Damianovic, Marcia Helena Rissato Zamariolli ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Biol Processes Lab LPB, Sao Carlos Sch Engn EESC, Av Joao Dagnone 1100, BR-13563120 Sao Carlos, SP - Brazil

^[2] Sao Paulo State Univ Unesp, Inst Geosci & Exact Sci IGCE, Av 24 A, 1515 Bela Vista, BR-13506900 Rio Claro, SP - Brazil

^[3] Univ Fed Alfenas, Environm Microbiol Lab, Inst Sci & Technol, Rodovia Jose Aurelio Vilela 11999, BR 267 Km 533, Pocos De Caldas, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 330, JUN 2021.
• Citações Web of Science: 0

Resumo

The down flow structured bed bioreactor (DFSBR) was applied to treat synthetic acid mine drainage (AMD) to reduce sulfate, increase the pH and precipitate metals in solutions (Co, Cu, Fe, Mn, Ni and Zn) using vinasse as an electron donor for sulfate-reducing bacteria (SRB). DFSBR achieved sulfate removal efficiencies between 55 and 91%, removal of Co and Ni were obtained with efficiencies greater than 80%, while Fe, Zn, Cu and Mn were removed with average efficiencies of 70, 80, 73 and 60%, respectively. Sulfate reduction increased pH from moderately acidic to 6.7?7.5. Modelling data confirmed the experimental results and metal sulfide precipitation was the mainly responsible for metal removal. The main genera responsible for sulfate and metal reduction were Geobacter and Desulfovibrio while fermenters were Parabacteroides and Sulfurovum. Moreover, in syntrophism with SRB, they played an important role in the efficiency of metal and sulfate removal. (AU)

• Processo FAPESP: 15/06246-7 - Aplicação do conceito de biorrefinaria a estações de tratamento biológico de águas residuárias: o controle da poluição ambiental aliado à recuperação de matéria e energia
• Beneficiário: Marcelo Zaiat
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/24526-0 - Influência de elementos-traço na geração de biogás a partir do tratamento de águas residuárias
• Beneficiário: Lauren Nozomi Marques Yabuki
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado