Production of hydrogen, ethanol and volatile fatty acids through co-fermentation of macro- and micro-algae

Bioresource Technology
Ao XiaJerry D Murphy

Abstract

Algae may be fermented to produce hydrogen. However micro-algae (such as Arthrospira platensis) are rich in proteins and have a low carbon/nitrogen (C/N) ratio, which is not ideal for hydrogen fermentation. Co-fermentation with macro-algae (such as Laminaria digitata), which are rich in carbohydrates with a high (C/N) ratio, improves the performance of hydrogen production. Algal biomass, pre-treated with 2.5% dilute H2SO4 at 135°C for 15min, effected a total yield of carbohydrate monomers (CMs) of 0.268g/g volatile solids (VS). The CMs were dominating by glucose and mannitol and most (ca. 95%) were consumed by anaerobic fermentative micro-organisms during subsequent fermentation. An optimal specific hydrogen yield (SHY) of 85.0mL/g VS was obtained at an algal C/N ratio of 26.2 and an algal concentration of 20g VS/L. The overall energy conversion efficiency increased from 31.3% to 54.5% with decreasing algal concentration from 40 to 5 VS g/L.

References

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Citations

May 31, 2016·Bioresource Technology·Muhammad Rizwan TabassumJerry D Murphy
Aug 28, 2016·Bioresource Technology·Kricelle Mosquera DeamiciLucielen Oliveira Santos
Oct 26, 2016·Biotechnology for Biofuels·Ana F MirandaAidyn Mouradov
Dec 8, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Jose Antonio Magdalena, Cristina González-Fernández
May 14, 2018·Environmental Science and Pollution Research International·Keerthi Katam, Debraj Bhattacharyya
Nov 11, 2019·Journal of Hazardous Materials·Jingxin CaoShiming Ding
Nov 1, 2020·Bioresource Technology·Marwa M El-DalatonyEl-Sayed Salama

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