Evaluating the effects of pH and temperature on sulphate-reducing bacteria and modelling of their effects in stirred bioreactors

dc.contributor.authorMoloantoa, Karabelo
dc.contributor.authorKhetsha, Zenzile
dc.contributor.authorMochane, Mokgaotsa
dc.contributor.authorUnuofin, John Onolame
dc.contributor.authorAtangana, Abdon
dc.contributor.authorCason, Errol
dc.contributor.authorVan Heerden, Esta
dc.contributor.authorCastillo, Julio
dc.date.accessioned2024-05-28T11:08:26Z
dc.date.available2024-05-28T11:08:26Z
dc.date.issued2023
dc.descriptionDATA AVAILABILITY STATEMENT : Data used and presented in this study can be made available upon requests to the corresponding authors.en_US
dc.description.abstractSulphate (SO4) abundance in the earth’s crust contributes largely to industrial wastewater contamination lowering the pH, which exuberates the dissolution of metals forming acidic drainages. Biological sulphate reduction as a remediation process can be affected by factors such as pH, temperature and high sulphide concentrations. In this study, sulphate-reducing bacterial community enriched from mine wastewaters was applied in semi-automated bioreactors to assess the effects of these factors on microbial sulphate reduction capacities. Low pH (3.5) and temperature (10°C) were observed to promote the toxicity of sulphur-reduced species on the consortium while mesophilic temperature (25°C) and near neutral pH (6.2) were observed to induce optimum SO4 reduction attaining a maximum of 95% SO4 reduction. Obtained SO4 reduction dynamics data was then applied in formulating a unique non-competitive inhibition equation that models biogeochemical events during SO4 reduction under varied pH and temperature conditions and predicts the efficacy of a bioremediation system.en_US
dc.description.departmentChemical Engineeringen_US
dc.description.librarianam2024en_US
dc.description.sdgSDG-12:Responsible consumption and productionen_US
dc.description.urihttp://www.tandfonline.com/journals/tcsb21en_US
dc.identifier.citationKarabelo Moloantoa, Zenzile Khetsha, Mokgaotsa Mochane, John Unuofin, Abdon Atangana, Errol Cason, Esta van Heerden & Julio Castillo (2023) Evaluating the effects of pH and temperature on sulphate-reducing bacteria and modelling of their effects in stirred bioreactors, Environmental Pollutants and Bioavailability, 35:1, 2257388, DOI: 10.1080/26395940.2023.2257388.en_US
dc.identifier.issn2639-5940
dc.identifier.other10.1080/26395940.2023.2257388
dc.identifier.urihttp://hdl.handle.net/2263/96268
dc.language.isoenen_US
dc.publisherTaylor and Francisen_US
dc.rights© 2023 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License.en_US
dc.subjectBacterial consortiumen_US
dc.subjectBiogeochemical modellingen_US
dc.subjectBio-precipitationen_US
dc.subjectBioreactorsen_US
dc.subjectBioremediationen_US
dc.subjectSulphate reductionen_US
dc.subjectWater contaminationen_US
dc.subjectSDG-12: Responsible consumption and productionen_US
dc.titleEvaluating the effects of pH and temperature on sulphate-reducing bacteria and modelling of their effects in stirred bioreactorsen_US
dc.typeArticleen_US

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