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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Microbial processes and bacterial populations associated to anaerobic treatment of sulfate-rich wastewater

Texto completo
Autor(es):
Sarti, Arnaldo [1] ; Pozzi, Eloisa [1] ; Chinalia, Fabio A. [2] ; Ono, Alexandre [1] ; Foresti, Eugenio [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Hidraul & Saneamento, Escola Engn Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
[2] Cranfield Univ, Sch Appl Sci, Cranfield MK43 0AL, Beds - England
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Process Biochemistry; v. 45, n. 2, p. 164-170, FEB 2010.
Citações Web of Science: 37
Resumo

A pilot-scale (1.2 m(3)) anaerobic sequencing batch biofilm reactor (ASBBR) containing mineral coal for biomass attachment was fed with sulfate-rich wastewater at increasing sulfate concentrations. Ethanol was used as the main organic source. Tested COD/sulfate ratios were of 1.8 and 1.5 for sulfate loading rates of 0.65-1.90 kgSO(4)(2-)/cycle (48 h-cycle) or of 1.0 in the trial with 3.0 gSO(4)(2-) l(-1). Sulfate removal efficiencies observed in all trials were as high as 99%. Molecular inventories indicated a shift on the microbial composition and a decrease on species diversity with the increase of sulfate concentration. Beta-proteobacteria species affiliated with Aminomonas spp. and Thermanaerovibrio spp. predominated at 1.0 gSO(4)(2-) l(-1). At higher sulfate concentrations the predominant bacterial group was Delta-proteobacteria mainly Desulfovibrio spp. and Desulfomicrobium spp. at 2.0 gSO(4)(2-) l(-1), whereas Desulfurella spp. and Coprothermobacter spp. predominated at 3.0 gSO(4)(2-) l(-1). These organisms have been commonly associated with sulfate reduction producing acetate, sulfide and sulfur. Methanogenic archaea(Methanosaeta spp.)was found at 1.0 and 2.0 gSO(4)(2-) l(-1). Additionally, a simplified mathematical model was used to infer on metabolic pathways of the biomass involved in sulfate reduction. (C) 2009 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 03/07799-2 - Desempenho de reator anaeróbio operado em batelada sequencial (escala piloto) no tratamento de água residuária de indústria química
Beneficiário:Arnaldo Sarti
Linha de fomento: Bolsas no Brasil - Pós-Doutorado