Evaluating the effect of pH, temperature, and hydraulic retention time on biological sulphate reduction using response surface methodology

dc.contributor.authorMukwevho, Mukhethwa J.
dc.contributor.authorMaharajh, Dheepak
dc.contributor.authorChirwa, Evans M.N.
dc.date.accessioned2021-02-15T11:02:27Z
dc.date.available2021-02-15T11:02:27Z
dc.date.issued2020-09-23
dc.description.abstractBiological sulphate reduction (BSR) has been identified as a promising alternative for treating acid mine drainage. In this study, the effect of pH, temperature, and hydraulic retention time (HRT) on BSR was investigated. The Box–Behnken design was used to matrix independent variables, namely pH (4–6), temperature (10–30 C), and HRT (2–7 days) with the sulphate reduction efficiency and sulphate reduction rate as response variables. Experiments were conducted in packed bed reactors operating in a down flow mode. Response surface methodology was used to statistically analyse the data and to develop statistical models that can be used to fully understand the individual effects and the interactions between the independent variables. The analysis of variance results showed that the data fitted the quadratic models well as confirmed by a non-significant lack of fit. The temperature and HRT effect were significant (p < 0.0001), and these two variables had a strong interaction. However, the influence of pH was insignificant (p > 0.05).en_ZA
dc.description.departmentChemical Engineeringen_ZA
dc.description.librarianam2021en_ZA
dc.description.urihttp://www.mdpi.com/journal/wateren_ZA
dc.identifier.citationMukwevho, M.J., Maharajh, D. & Chirwa, E.M.N. 2020, 'Evaluating the effect of pH, temperature, and hydraulic retention time on biological sulphate reduction using response surface methodology', Water, vol. 12, no. 2662, pp. 1-17.en_ZA
dc.identifier.issn2073-4441 (online)
dc.identifier.other10.3390/w12102662
dc.identifier.urihttp://hdl.handle.net/2263/78625
dc.language.isoenen_ZA
dc.publisherMDPI Publishingen_ZA
dc.rights© 2020 by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) licenseen_ZA
dc.subjectAcid mine drainageen_ZA
dc.subjectSulphate reductionen_ZA
dc.subjectSulphate reducing bacteriaen_ZA
dc.subjectResponse surface methodologyen_ZA
dc.subjectBiological sulphate reduction (BSR)en_ZA
dc.titleEvaluating the effect of pH, temperature, and hydraulic retention time on biological sulphate reduction using response surface methodologyen_ZA
dc.typeArticleen_ZA

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