Bio ethanol from sewage sludge: A bio fuel alternative

M. M. Manyuchi, P. Chiutsi, C. Mbohwa, E. Muzenda, T. Mutusva

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 (4.0–7.0), temperature (15–45 °C), incubation time (10–70 h) and yeast concentrations (2–10% (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.

Original languageEnglish
Pages (from-to)123-127
Number of pages5
JournalSouth African Journal of Chemical Engineering
Volume25
DOIs
Publication statusPublished - Jun 1 2018
Externally publishedYes

Fingerprint

sewage
biofuel
Alternative fuels
Sewage sludge
Ethanol
interaction
Yeast
raw materials
Fermentation
confidence
Saccharification
Peptones
Spectrophotometry
Bacilli
Temperature
MATLAB
Raw materials
Viscosity

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Education
  • Energy (miscellaneous)
  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes
  • Filtration and Separation

Cite this

Manyuchi, M. M. ; Chiutsi, P. ; Mbohwa, C. ; Muzenda, E. ; Mutusva, T. / Bio ethanol from sewage sludge : A bio fuel alternative. In: South African Journal of Chemical Engineering. 2018 ; Vol. 25. pp. 123-127.
@article{fc5bd365a78446fa91056ae689bea4da,
title = "Bio ethanol from sewage sludge: A bio fuel alternative",
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 (4.0–7.0), temperature (15–45 °C), incubation time (10–70 h) and yeast concentrations (2–10{\%} (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.",
author = "Manyuchi, {M. M.} and P. Chiutsi and C. Mbohwa and E. Muzenda and T. Mutusva",
year = "2018",
month = "6",
day = "1",
doi = "10.1016/j.sajce.2018.04.003",
language = "English",
volume = "25",
pages = "123--127",
journal = "South African Journal of Chemical Engineering",
issn = "1026-9185",
publisher = "Elsevier B.V.",

}

Bio ethanol from sewage sludge : A bio fuel alternative. / Manyuchi, M. M.; Chiutsi, P.; Mbohwa, C.; Muzenda, E.; Mutusva, T.

In: South African Journal of Chemical Engineering, Vol. 25, 01.06.2018, p. 123-127.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Bio ethanol from sewage sludge

T2 - A bio fuel alternative

AU - Manyuchi, M. M.

AU - Chiutsi, P.

AU - Mbohwa, C.

AU - Muzenda, E.

AU - Mutusva, T.

PY - 2018/6/1

Y1 - 2018/6/1

N2 - 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 (4.0–7.0), temperature (15–45 °C), incubation time (10–70 h) and yeast concentrations (2–10% (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.

AB - 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 (4.0–7.0), temperature (15–45 °C), incubation time (10–70 h) and yeast concentrations (2–10% (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.

UR - http://www.scopus.com/inward/record.url?scp=85046170837&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046170837&partnerID=8YFLogxK

U2 - 10.1016/j.sajce.2018.04.003

DO - 10.1016/j.sajce.2018.04.003

M3 - Article

AN - SCOPUS:85046170837

VL - 25

SP - 123

EP - 127

JO - South African Journal of Chemical Engineering

JF - South African Journal of Chemical Engineering

SN - 1026-9185

ER -