Autor(es): Nogueira, Elis Watanabe ; Gouvêa de Godoi, Leandro Augusto ; Marques Yabuki, Lauren Nozomi [UNESP] ; Brucha, Gunther ; Zamariolli Damianovic, Márcia Helena Rissato
Data: 2021
Identificador Persistente: http://hdl.handle.net/11449/206053
Origem: Oasisbr
Assunto(s): Bacterial community structure; Metal precipitation; Sulfate-reducing bacteria; Syntrophism
Made available in DSpace on 2021-06-25T10:25:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-06-01
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.
Biological Processes Laboratory (LPB) São Carlos School of Engineering (EESC) University of São Paulo (USP), Av. João Dagnone, 1100, Santa Angelina
Institute of Geosciences and Exact Sciences (IGCE) São Paulo State University (UNESP), Av. 24 A, 1515 - Bela Vista
Environmental Microbiology Laboratory Institute of Science and Technology Federal University of Alfenas Rodovia José Aurélio Vilela, 11999 (BR 267 Km 533) Cidade Universitária
Institute of Geosciences and Exact Sciences (IGCE) São Paulo State University (UNESP), Av. 24 A, 1515 - Bela Vista
