The Digestate: A Nutrient Source for the Alternative Biomass for Anaerobic Digestion
DOI:
https://doi.org/10.14311/TEE.2018.4.086Abstract
Construction of new biogas plant stations in Europe is a steadily growing trend, that is the reason why there is a need to find a proper alternative source of energy, which can replace traditional crops used for generation of energy. Microalgae represent a high potential of energy. When comparing microalgae with traditional crops, we can point out their high potential (oil content). During the production of biogas from traditional input materials, it is still a great potential of resulting organic waste – fermentation water (digestate), which can be used in a closed cycle in the intensive year-round cultivation of microalgae. Using the by-product (digestate) generated during the process of anaerobic digestion we can create a system for the cultivation of microalgae, which will in turn be used as a raw material for the biogas plant. Thanks to such application, the biogas plant can be more ‘self-sufficient’. This new innovative process can provide a prerequisite scale for increasing commercial use of bioenergy from microalgae. However, there is a need to find a reasonable way to produce the algae biomass to meet all ecological and economic requirements.References
F. Tambone, P. Genevini, G. D’Imporzano, and F. Adani, “Assessing amendment properties of digestate by studying the organic matter composition and the degree of biological stability during the anaerobic digestion of the organic fraction of MSW,” Bioresource Technology, vol. 100 (12), pp. 3140–3142, 2009.
https://doi.org/10.1016/j.biortech.2009.02.012
W. Fuchs and B. Drosg, “Assessment of the state of the art of technologies for the processing of digestate residue from anaerobic digesters,” Water science and technology, vol. 67 (9), pp. 1984-1993, 2013.
https://doi.org/10.2166/wst.2013.075
D. Veronesi, A. Ida, G. D’Imporzano, and F. Adani, “Microalgae Cultivation: Nutrient Recovery from Digestate for Producing Algae Biomass,” Chemical Engineering Transactions, vol. 43, ISBN 978-88-95608-34-1; ISSN 2283-9216, 2015.
L. Zuliani, N. Frison, A. Jelic, F. Fatone, D. Bolzonella, and M. Ballottari, “Microalgae Cultivation on Anaerobic Digestate of Municipal Wastewater, Sewage Sludge and Agro-Waste,” International Journal of Molecular Sciences, vol. 10, 17 p., 2016.
A. Xia and J. D. Murphy, “Microalgal Cultivation in Treating Liquid Digestate from Biogas Systems,” Trends in Biotechnology, vol. 34 (4), pp. 264-275, 2016.
https://doi.org/10.1016/j.tibtech.2015.12.010
C. G. Golueke and W. J. Oswald, “Biological Conversion of Light Energy to the Chemical Energy of Methane,” Applied Microbiology, vol. 7 (4), pp. 219–227, 1959.
E. Uggetti, B. Sialve, E. Latrille, and J. P. Steyer, “Anaerobic digestate as substrate for microalgae culture: the role of ammonium concentration on the microalgae productivity,” Bioresource technology, vol. 152, pp. 437-443, 2014.
https://doi.org/10.1016/j.biortech.2013.11.036
A. Richmond, Handbook of Microalgal Culture: Biotechnology and Applied Phycology, Blackwell Publishing, ISBN: 9780632059539, 2004.
J. Cheng, J. Xu, Y. Huang, Y. Li, J. Zhou, and K. Cen, “Growth optimisation of microalga mutant at high CO₂ concentration to purify undiluted anaerobic digestion effluent of swine manure,” Bioresource technology, vol. 177, pp. 240-246, 2015.
J. M. Juarez, E. R. Pastor, J. M. F. Sevilla, and R. M. Torre, “Effect of pretreatments on biogas production from microalgae biomass grown in pig manure treatment plants,” Bioresource Technology, vol. 257, pp. 30–38, 2018.
https://doi.org/10.1016/j.biortech.2018.02.063
H. Wang, W. Zhang, L. Chen, J. Wang, and T. Liu, “The contamination and control of biological pollutants in mass cultivation of microalgae,” Bioresource Technology, vol. 128, pp. 745–750, 2013.
https://doi.org/10.1016/j.biortech.2012.10.158
J. B. K. Park, R. J. Craggs, and A. N. Shilton, “Wastewater treatment high rate algal ponds for biofuel production,” Bioresource Technology, vol. 102 (1), pp. 35–42, 2011.
