Publications by authors named "Javier Lizasoain"
Article Synopsis
- The study assessed how thermal pretreatment at varying temperatures (60, 80, and 100°C) for different durations (10 and 20 minutes) influences biogas production from hotel food waste in Jaipur, India, over a 45-day anaerobic batch test.
- Results indicated that pretreatment at 100°C for 10 minutes led to a 41% increase in total biogas production compared to untreated waste, with this method ranking highest in a multicriteria decision-making model.
- Advanced techniques like modified Gompertz and Logistic models analyzed pretreatment effects, while scanning electron microscopy and Fourier transform infrared spectroscopy were used to explore changes in the physiochemical properties of the food waste.
Article Synopsis
- The study investigated how steam explosion affects corn stover's chemical makeup and its potential to produce biomethane, testing temperatures from 140°C to 220°C and times from 2 to 15 minutes.
- Findings revealed that pretreating corn stover at 160°C for 2 minutes boosted methane yield by 22%, while harsher conditions reduced hemicellulose and methane output but increased lignin levels due to pseudo-lignin formation.
- Additionally, the anaerobic digestion tests indicated that steam explosion improves the breakdown of structural carbohydrates and reduces acid-insoluble lignin.
Article Synopsis
- Biogas production is a promising renewable energy source, and determining the biomethane potential (BMP) of various organic materials is crucial for designing anaerobic digesters.
- A workshop in June 2015 in Switzerland brought together over 40 participants from 30 laboratories to address the inconsistencies in BMP test results and agree on common validation methods.
- The paper outlines essential validation elements for BMP tests, including specific testing protocols, the importance of control assays, and recommendations for factors affecting BMP results to improve reliability and reproducibility.
Ethanol and biogas are energy carriers that could contribute to a future energy system independent of fossil fuels. Straw is a favorable bioenergy substrate as it does not compete with food or feed production. As straw is very resistant to microbial degradation, it requires a pretreatment to insure efficient conversion to ethanol and/or methane.
View Article and Find Full Text PDFWheat straw can serve as a low-cost substrate for energy production without competing with food or feed production. This study investigated the effect of steam explosion pretreatment on the biological methane potential and the degradation kinetics of wheat straw during anaerobic digestion. It was observed that the biological methane potential of the non steam exploded, ground wheat straw (276 l(N) kg VS(-1)) did not significantly differ from the best steam explosion treated sample (286 l(N) kg VS(-1)) which was achieved at a pretreatment temperature of 140°C and a retention time of 60 min.
View Article and Find Full Text PDFGrasslands are often abandoned due to lack of profitability. Extensively cultivating grassland for utilization in a biogas-based biorefinery concept could mend this problem. Efficient bioconversion of this lignocellulosic biomass requires a pretreatment step.
View Article and Find Full Text PDF