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Energies 2015, 8(1), 454-474; doi:10.3390/en8010454

Anaerobic Digestion and Biogas Potential: Simulation of Lab and Industrial-Scale Processes

National Centre for Engineering in Agriculture (NCEA), University of Southern Queensland (USQ), Toowoomba, 4350 QLD, Australia
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Author to whom correspondence should be addressed.
Academic Editor: Thomas E. Amidon
Received: 2 October 2014 / Accepted: 31 December 2014 / Published: 13 January 2015
(This article belongs to the Special Issue Bioenergy and Biorefining)
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Abstract

In this study, a simulation was carried out using BioWin 3.1 to test the capability of the software to predict the biogas potential for two different anaerobic systems. The two scenarios included: (1) a laboratory-scale batch reactor; and (2) an industrial-scale anaerobic continuous lagoon digester. The measured data related to the operating conditions, the reactor design parameters and the chemical properties of influent wastewater were entered into BioWin. A sensitivity analysis was carried out to identify the sensitivity of the most important default parameters in the software’s models. BioWin was then calibrated by matching the predicted data with measured data and used to simulate other parameters that were unmeasured or deemed uncertain. In addition, statistical analyses were carried out using evaluation indices, such as the coefficient of determination (R-squared), the correlation coefficient (r) and its significance (p-value), the general standard deviation (SD) and the Willmott index of agreement, to evaluate the agreement between the software prediction and the measured data. The results have shown that after calibration, BioWin can be used reliably to simulate both small-scale batch reactors and industrial-scale digesters with a mean absolute percentage error (MAPE) of less than 10% and very good values of the indexes. Furthermore, by changing the default parameters in BioWin, which is a way of calibrating the models in the software, as well, this may provide information about the performance of the digester. Furthermore, the results of this study showed there may be an over estimation for biogas generated from industrial-scale digesters. More sophisticated analytical devices may be required for reliable measurements of biogas quality and quantity. View Full-Text
Keywords: wastewater; anaerobic digestion (AD); biogas; BioWin; meat industry; simulation wastewater; anaerobic digestion (AD); biogas; BioWin; meat industry; simulation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Hamawand, I.; Baillie, C. Anaerobic Digestion and Biogas Potential: Simulation of Lab and Industrial-Scale Processes. Energies 2015, 8, 454-474.

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