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Bio ethanol from sewage sludge: a bio fuel alternative

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dc.contributor.author Manyuchi, Musaida Mercy
dc.contributor.author Chiutsi, Patience
dc.contributor.author Mbohwa, Charles
dc.contributor.author Muzenda, Edison
dc.contributor.author Mutusva, Trevor
dc.date.accessioned 2019-06-03T09:37:47Z
dc.date.available 2019-06-03T09:37:47Z
dc.date.issued 2018-04-17
dc.identifier.citation Manyuchi, M.M. et al (2018) Bio ethanol from sewage sludge: a bio fuel alternative.South African Journal of Chemical Engineering, 25, 123-127. https://doi.org/10.1016/j.sajce.2018.04.003 en_US
dc.identifier.issn 1026-9185
dc.identifier.uri https://repository.biust.ac.bw/handle/123456789/88
dc.description.abstract In this study, the potential to fully exploit sewage sludge as a raw material for bio ethanol a source of bio fuel is investigated. Sewage sludge hydrolysate was first made by introducing Bacillus flexus in order for saccharification to take place before fermenting to bio ethanol using yeast. The hydrolysate was then prepared for fermentation by introducing 10 g/L of peptone, 2 g/L of KH2PO4 and 1 g/L of MgSO4. Afterwards, fermentation was allowed to take place at varying pH (4.0e7.0), temperature (15e45 C), incubation time (10e70 h) and yeast concentrations (2e10% (v/v). Bio ethanol concentrations were characterized through spectrophotometry and its physicochemical properties analyzed by standard methods. Pearson Correlations Coefficients in MATLAB 13.0 were used to determine the coefficients of interaction between the various parameters in bio ethanol production at 95% confidence interval. Highest bio ethanol yields of greater than 40 mL/L were achieved at an incubation period of 10 days, with an operating temperature of 30 C and pH of 6.5 with yeast concentration of 6% wt. The interactions between incubation temperature and pH had the best interaction coefficient of 0.9759 being achieved for optimal bio ethanol yield. The bio ethanol produced had a flash point of 19.2 C, pour point of 4.9 C, cloud point of 20 C and viscosity of 1.30 cP. en_US
dc.language.iso en en_US
dc.publisher Elsevier B.V. on behalf of Institution of Chemical Engineers en_US
dc.subject Bio ethanol en_US
dc.subject Biomass en_US
dc.subject Hydrolysis en_US
dc.subject Fermentation en_US
dc.subject Process conditions en_US
dc.subject Sewage sludge en_US
dc.title Bio ethanol from sewage sludge: a bio fuel alternative en_US
dc.description.level phd en_US
dc.description.accessibility unrestricted en_US
dc.description.department cme en_US


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