Title:
Black Rice Straw as a Feedstock for the Extraction of Anthocyanin and Sugars in a Combined Biorefinery
Author(s):
Moirangthem, K., Ramakrishna, P., Ghumra, A., Rajkumari, R., Tucker, G.
Document(s):
Paper
Abstract:
Lignocellulosic biofuels production using the present technology is not an economical process. A way forward for 21st century biorefinery could be by combining high value products with biofuel production. A potential example might be the extraction of anthocyanin from the straw of black rice Chakhao Poireiton and use of the residue for biofuel production. The anthocyanin content of the straw was 63mg/100g and a microwave aqueous treatment could extract around 90% of this. These water extracts displayed high antioxidant capacity suggesting their potential use as bio actives. The recovered straw after pre-treatment showed a glucose digestibility of ~50%. On further fractionation, it was evident that the top fraction of the stem (first internode) did not contain any anthocyanin with the main accumulation observed in the lower internodes. The study shows the potential to develop a combined biorefinery process for anthocyanin and second generation sugars. This would benefit farmers by adding value to the straw or by fractionating the straw depending on its use. Higher value of the straw could contribute to the revitalisation of black rice cultivation and possibly improve its potential as a crop for the future.
Keywords:
agricultural residues, biorefinery, Anthocyanin, black rice straw, bioactivity, microwave pre-treatment
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Biorefineries
Event:
25th European Biomass Conference and Exhibition
Session:
3BO.7.4
Pages:
967 - 970
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-3BO.7.4
Price:
FREE
