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Optimisation of anaerobic digestion of pot ale after thermochemical pre-treatment through response surface methodology

Gunes, Burcu, Stokes, Joseph orcid logoORCID: 0000-0002-6924-1887, Davis, Paul, Connolly, Cathal and Lawler, Jenny orcid logoORCID: 0000-0001-9947-0958 (2020) Optimisation of anaerobic digestion of pot ale after thermochemical pre-treatment through response surface methodology. Biomass & Bioenergy, 144 . ISSN 0961-9534

Valorisation of organic wastes in renewable energy production has attracted a global attention in order to achieve a sustainable industrial growth. Anaerobic digestion (AD) is considered to be one of the most envi- ronmentally friendly waste management technology and also fulfils the necessity of a sustainable fuel generation. It has much less energy demand than other technologies like gasification or pyrolysis due to its low operation temperature. Whiskey distillery wastewater, pot ale, is classified as a high strength waste due its high organic content hence rendering it a suitable substrate for anaerobic digestion. Despite its waste-to-energy conversion potential, pot ale contains high lignin fraction which makes it resistant to biodegradation. Therefore introducing a pre-treatment step is required to enhance the biogas production and organic matter degradation. In this study anaerobic digestion of pot ale was assessed at lab scale batch mode reactor after implementation of 1 M NaOH and microwave pre-treatments at varying power settings. Response Surface Methodology was adopted for pro- cess modelling and optimisation in which inoculum substrate ratio, initial digestion pH and microwave power were investigated at three different levels. In addition, the mineral quality of the pot ale digestate has been analysed for its agricultural use.
Item Type:Article (Published)
Additional Information:Article Number 105902. Supplementary data related to this article can be found at https://doi.org/10.1016/j.biombioe.2020.105902
Uncontrolled Keywords:Pot ale; Anaerobic digestion; Thermochemical pre-treatment; Response surface methodology; Optimisation
Subjects:Biological Sciences > Biotechnology
DCU Faculties and Centres:DCU Faculties and Schools > DCU Business School
DCU Faculties and Schools > Faculty of Engineering and Computing > School of Mechanical and Manufacturing Engineering
DCU Faculties and Schools > Faculty of Science and Health > School of Biotechnology
Research Institutes and Centres > Water Institute
Official URL:https://dx.doi.org/10.1016/j.biombioe.2020.105902
Copyright Information:© 2020 Elsevier
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Alltech Ireland Ltd. Project ID 15-S-ST-10568
ID Code:25673
Deposited On:23 Mar 2021 13:13 by Burcu Gunes . Last Modified 24 Mar 2021 14:06

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