Kinetic modeling, sensitivity analysis, and techno-economic feasibility of ethanol fermentation from non-sterile carob extract-based media in Saccharomyces cerevisiae biofilm reactor under a repeated-batch fermentation process

Germec M., KARHAN M., Demirci A., TURHAN İ.

Fuel, cilt.324, 2022 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 324
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.fuel.2022.124729
  • Dergi Adı: Fuel
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Biotechnology Research Abstracts, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Anahtar Kelimeler: Bioethanol production, Biofilm reactor, Kinetic modeling, Saccharomyces cerevisiae, Sensitivity, Techno-Economical evaluation
  • Akdeniz Üniversitesi Adresli: Evet

Özet

© 2022 Elsevier LtdThis study aimed to model kinetically ethanol fermentation by Saccharomyces cerevisiae in the biofilm reactor, analyze the sensitivity of the developed model, and determine the techno-economic feasibility of ethanol fermentation. Two different media including the non-sterile enriched (NSE) and non-sterile unenriched media (NSUE) were evaluated for ethanol production. Based on the results, the experimental biomass production, ethanol production, and substrate consumption data from both the NSE and NSUE media were fitted very well by the logistic, Luedeking-Piret, and modified Luedeking-Piret models developed for each fermentation with higher R2 values than 0.96. Besides, it was determined that the ethanol production processes were growth-associated as α values (g ethanol/g substrate) were higher than β values (g ethanol/g substrate/h). Sensitivity analysis gave extremely satisfactory results with high R2 values ranging from 0.960 to 0.995. According to the techno-economic analysis, ethanol production from the NSUE medium was more economical than that of the NSE medium since its economic yield and economic productivity values were 21.0–21.1 and 13.4–16.8 times higher, respectively. Consequently, the developed models estimated successfully the experimental data yielded from non-sterile (un)enriched media in the biofilm reactor and can be used to describe ethanol fermentation under non-sterile conditions.