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

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dc.contributor.authorSarti, Arnaldo
dc.contributor.authorPozzi, Eloisa
dc.contributor.authorChinalia, Fabio A.
dc.contributor.authorOno, Alexandre
dc.contributor.authorForesti, Eugenio
dc.date.accessioned2010-01-11T16:11:22Z
dc.date.available2010-01-11T16:11:22Z
dc.date.issued2010-02
dc.description.abstractA pilot-scale (1.2 m3) 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 kgSO42−/cycle (48 h-cycle) or of 1.0 in the trial with 3.0 gSO42− 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 gSO42− l−1. At higher sulfate concentrations the predominant bacterial group was Delta-proteobacteria mainly Desulfovibrio spp. and Desulfomicrobium spp. at 2.0 gSO42− l−1, whereas Desulfurella spp. and Coprothermobacter spp. predominated at 3.0 gSO42− 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 gSO42− l−1. Additionally, a simplified mathematical model was used to infer on metabolic pathways of the biomass involved in sulfate reduction.en_UK
dc.identifier.citationArnaldo Sarti, Eloisa Pozzi, Fabio A. Chinalia, Alexandre Ono, Eugenio Foresti, Microbial processes and bacterial populations associated to anaerobic treatment of sulfate-rich wastewater, Process Biochemistry, Volume 45, Issue 2, February 2010, Pages 164-170en_UK
dc.identifier.issn1359-5113
dc.identifier.urihttp://dx.doi.org/10.1016/j.procbio.2009.09.002
dc.identifier.urihttp://hdl.handle.net/1826/4132
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.subjectSulfate reductionen_UK
dc.subjectAnaerobic reactoren_UK
dc.subjectDNA libraryen_UK
dc.subjectBiofilmen_UK
dc.subjectPhylogenetic characterizationen_UK
dc.subjectMineral coalen_UK
dc.titleMicrobial processes and bacterial populations associated to anaerobic treatment of sulfate-rich wastewateren_UK
dc.typeArticleen_UK

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