Bioethanol Production from Cachaza as Hydrogen Feedstock: Effect of Ammonium Sulfate during Fermentation
| Autor: | Martha Cobo, Nestor Sanchez, Ruth Ruiz, Nicolas Infante |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Renewable energy
Ammonium sulfate Control and Optimization 020209 energy Energy Engineering and Power Technology Biomass 02 engineering and technology Raw material lcsh:Technology chemistry.chemical_compound Bioenergy sugarcane 0202 electrical engineering electronic engineering information engineering Ethanol fuel Electrical and Electronic Engineering agroindustrial wastes Agroindustrial wastes Engineering (miscellaneous) biomass lcsh:T Renewable Energy Sustainability and the Environment food and beverages Sugarcane fermentation impurities 021001 nanoscience & nanotechnology Pulp and paper industry renewable energy Fermentation impurities chemistry Biofuel Fermentation 0210 nano-technology Energy source Energy (miscellaneous) |
| Zdroj: | Energies; Volume 10; Issue 12; Pages: 2112 Repositorio Universidad de la Sabana Universidad de la Sabana instacron:Universidad de la Sabana Energies, Vol 10, Iss 12, p 2112 (2017) |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en10122112 |
| Popis: | 10 páginas Cachaza is a type of non-centrifugal sugarcane press-mud that, if it is not employed efficiently, generates water pollution, soil eutrophication, and the spread of possible pathogens. This biomass can be fermented to produce bioethanol. Our intention is to obtain bioethanol that can be catalytically reformed to produce hydrogen (H2) for further use in fuel cells for electricity production. However, some impurities could negatively affect the catalyst performance during the bioethanol reforming process. Hence, the aim of this study was to assess the fermentation of Cachaza using ammonium sulfate ((NH4)2SO4) loadings and Saccharomyces cerevisiae strain to produce the highest ethanol concentration with the minimum amount of impurities in anticipation of facilitating further bioethanol purification and reforming for H2 production. The results showed that ethanol production from Cachaza fermentation was about 50 g·L−1 and the (NH4)2SO4 addition did not affect its production. However, it significantly reduced the production of branched alcohols. When a 160 mg·L−1 (NH4)2SO4 was added to the fermentation culture, 2-methyl-1-propanol was reduced by 41% and 3-methyl-1-butanol was reduced by 6%, probably due to the repression of the catabolic nitrogen mechanism. Conversely, 1-propanol doubled its concentration likely due to the higher threonine synthesis promoted by the reducing sugar presence. Afterwards, we employed the modified Gompertz model to fit the ethanol, 2M1P, 3M1B, and 1-propanol production, which provided acceptable fits (R2 > 0.881) for the tested compounds during Cachaza fermentation. To the best of our knowledge, there are no reports of the modelling of aliphatic production during fermentation; this model will be employed to calculate yields with further scaling and for life cycle assessment. |
| Databáze: | OpenAIRE |
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