Partial thiosulfate oxidation by steady‐state continuous culture in a bioreactor‐settler system

Velasco, Ambrosio; Alcántara, S.; Razo-Flores, Elı́as; Revah, Sergio

doi:10.1002/jctb.949

Cited by 6 publications

(6 citation statements)

References 18 publications

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“…Bioreactors with completely different configuration (i.e. biotrickling filters, expanded-bed reactors) have been reported in the literature for the elemental sulfur formation [38,42,43].…”

Section: Discussionmentioning

confidence: 99%

H2S and volatile fatty acids elimination by biofiltration: Clean-up process for biogas potential use

Ramírez-Sáenz¹,

Zárate-Segura²,

Guerrero–Barajas³

et al. 2009

Journal of Hazardous Materials

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“…Bioreactors with completely different configuration (i.e. biotrickling filters, expanded-bed reactors) have been reported in the literature for the elemental sulfur formation [38,42,43].…”

Section: Discussionmentioning

confidence: 99%

H2S and volatile fatty acids elimination by biofiltration: Clean-up process for biogas potential use

Ramírez-Sáenz¹,

Zárate-Segura²,

Guerrero–Barajas³

et al. 2009

Journal of Hazardous Materials

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“…Nevertheless the substrate to biomass yield and the maximum biomass concentration gave similar results for both cultures. IMP-TL mixed culture with no oxygen limitation and at pH 10.0 presented a complete thiosulfate oxidation with 0.5-1.5 day -1 dilution rates, according to the reaction described by Velasco et al (2004) where 1 mol of thiosulfate oxidizing produced 2 mol of sulfate. At higher dilution rates ([1.5 day -1 ) a partial thiosulfate oxidation occurred.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of haloalkaliphilic sulfur-oxidizing microorganisms with potential application in the effluent treatment of the petroleum industry

et al. 2010

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Haloalkaliphilic sulfur-oxidizing mixed cultures for the treatment of alkaline-saline effluents containing sulfide were characterized and evaluated. The mixed cultures (IMP-PB, IMP-XO and IMP-TL) were obtained from Mexican alkaline soils collected in Puebla (PB), Xochimilco (XO) and Tlahuac (TL), respectively. The Ribosomal Intergenic Spacer Analysis (RISA) revealed bacteria related to Thioalkalibacterium and Thioalkalivibrio in IMP-XO and IMP-PB mixed cultures. Halomonas strains were detected in IMP-XO and IMP-TL. In addition, an uncultured Bacteroides bacterium was present in IMP-TL. Mixed cultures were evaluated at different pH and NaCl concentrations at 30°C. IMP-PB and IMP-TL expressed thiosulfate-oxidizing activity in the 7.5-10.5 pH range, whereas IMP-XO presented its maximal activity with 19.0 mg O₂ g (protein)⁻¹ min⁻¹, at pH 10.6; it was not affected by NaCl concentrations up to 1.7 M. In continuous culture, IMP-XO showed a growth rate of 15 day⁻¹, productivity of 433.4 mg(protein) l⁻¹ day⁻¹ and haloalkaliphilic sulfur-oxidizing activity was also detected up to 170 mM by means of N-methyl-diethanolamine (MDEA). Saline-alkaline soil samples are potential sources of haloalkaliphilic sulfur-oxidizing bacteria and the mixed cultures could be applied in the treatment of inorganic sulfur compounds in petroleum industry effluents under alkaline-saline conditions.

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“…In previous work (Alcántara et al. 2004; Velasco et al. 2004), a recycling reactor system (RRS) was proposed to enhance the formation of elemental sulfur and its continuous removal from the liquid phase.…”

Section: Introductionmentioning

confidence: 99%

“…The main characteristic of the RRS is the physical separation of the aeration from the bioreactor. In the reactor, sulfur formation was favoured by the microaerophilic conditions and sedimentation and recovery were promoted by the induced laminar flow as shown by Velasco et al. (2004) where an ascending flow of 1·9 m h −1 resulted in a Reynolds number of c. 80.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Oxygen transfer and consumption in a thiosulfate oxidizing bioreactor with sulfur production

González-Sánchez

Alcántara

Razo-Flores

et al. 2005

Lett Appl Microbiol

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Aims: To evaluate the contribution of oxygen transfer and consumption in a sulfoxidizing system to increase the elemental sulfur yield from thiosulfate oxidation. Methods and Results: A 10 l thiosulfate oxidizing bioreactor with suspended cells operating under microaerophilic conditions and a separated aerator with a variable volume of 0AE8-1AE7 l were operated with a consortium containing mainly Thiobacillus sp. that oxidizes several sulfide species to elemental sulfur and sulfate. From the gas-liquid oxygen balance, the k L a was estimated under different operation conditions. A k L a of around 200 h )1 favoured elemental sulfur production and can serve as scale-up criterion. It was further shown that more than 50% of the oxygen fed to the system was consumed in the aerator. Conclusions: The performance of the sulfoxidizing system can be improved by controlling oxygen transfer. Significance and Impact of the Study: The proposed method for the k L a determination was based on the oxygen balance, which incorporates the oxygen concentrations measured in the liquid in steady state, reducing the interference of the response time in the traditional non-steady state methods. This approach can be used to optimize reactors where microaerophilic conditions are desirable.

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Partial thiosulfate oxidation by steady‐state continuous culture in a bioreactor‐settler system

Cited by 6 publications

References 18 publications

H2S and volatile fatty acids elimination by biofiltration: Clean-up process for biogas potential use

H2S and volatile fatty acids elimination by biofiltration: Clean-up process for biogas potential use

Evaluation of haloalkaliphilic sulfur-oxidizing microorganisms with potential application in the effluent treatment of the petroleum industry

Oxygen transfer and consumption in a thiosulfate oxidizing bioreactor with sulfur production

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