Impact of Storage Time on the Juice and Sugars Extracted from Chopped and Whole Stalk Sweet Pearl Millet and Sweet Sorgh
- PDF / 821,208 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 74 Downloads / 200 Views
Impact of Storage Time on the Juice and Sugars Extracted from Chopped and Whole Stalk Sweet Pearl Millet and Sweet Sorghum Biomass M. Crépeau 1 & M. Khelifi 2
&
A. Vanasse 3 & A. Bertrand 4 & M. Aider 5 & P. Seguin 6
# Springer Science+Business Media New York 2016
Abstract Since they have a high concentrations of fermentable sugars, sweet pearl millet and sweet sorghum are two interesting crops for bioethanol production. However, if the juice is not extracted from the biomass immediately after harvest, the biomass has to be transported and stored for further juice extraction. This delay could affect the amount of juice extracted and its sugar concentration. This paper presents the results of 3 years of experiments where different storage modes (chopped and whole stalks) and various storage time (0 to 14 days) were applied on two different crop species (sweet pearl millet and sweet sorghum). Storing sweet pearl millet as whole stalks for 2 weeks resulted in a water-soluble carbohydrate (WSC) concentration decrease of 52 %, while no significant decrease of the WSC concentration was observed for sweet sorghum. Whole stalks storage is much more efficient than storing the biomass chopped to avoid a rapid sugar loss. However, more juice can be extracted from stored
* M. Khelifi [email protected]
1
Department of Soils and Agri-Food Engineering, Université Laval, Québec, QC, Canada
2
Department of Soils and Agri-Food Engineering, Faculty of Agriculture and Food Sciences, Université Laval, Paul-Comtois Building, 2425 rue de l’Agriculture, Office 2305, Québec, QC G1V 0A6, Canada
3
Department of Phytology, Université Laval, Québec, QC, Canada
4
Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada, Québec, QC, Canada
5
Department of Soils and Agri-Food Engineering, Université Laval, Québec, QC, Canada
6
Department of Plant Science, McGill University, Sainte-Anne-de-Bellevue, Québec, Canada
chopped biomass than from stored whole stalks biomass. If the juice cannot be extracted quickly after the harvest, the biomass can be stored as whole stalks to avoid rapid sugar deterioration, especially for sweet sorghum. Keywords Sweet sorghum . Sweet pearl millet . Juice extraction . Sugars . Storage . Delay
Introduction While oil demand drastically increases and supply sources are being rapidly depleted, sustainable and alternative sources of energy need to be found. Bioethanol is considered as one of many solutions since it can be mixed to conventional gasoline to reduce oil consumption and consequently the global greenhouse gas emissions. Sweet pearl millet and sweet sorghum are both crops with a good potential for bioethanol production, since their stalks have a high concentrations of easily extractible fermentable sugars [1, 2]. While many research projects are ongoing on sweet sorghum as feedstock for bioethanol production worldwide, studies on sweet pearl millet remain scarce. Sweet sorghum is a very interesting crop since it can grow on marginal soils and uses water more
Data Loading...
