Gaida, Daniel and Wolf, Christian and Meyer, C. and Stuhlsatz, A. and Lippel, J. and Back, Thomas and Bongards, Michael and McLoone, Sean F. (2012) State estimation for anaerobic digesters using the ADM1. Water Science & Technology, 66 (5). pp. 1088-1095. ISSN 0273-1223

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Abstract

The optimization of full-scale biogas plant operation is of great importance to make biomass a competitive source of renewable energy. The implementation of innovative controi and optimization algorithms, such as Nonlinear Model Predictive Control, requires an online estimation of operating states of biogas plants. This state estimation allows for optimal control and operating decisions according to the actual state of a plant. In this paper such a state estimator is developed using a calibrated simulation model of a full-scale biogas plant, which is based on the Anaerobic Digestion Model N0.1. The use of advanced pattern recognition methods shows that model states can be predicted from basic online measurements such as biogas production, CH4 and CO2 content in the biogas, pH value and substrate feed volume of known substrates. The machine learning methods used are trained and evaluated using synthetic data created with the biogas plant model simulating over a wide range of possible plant operating regions. Results show that the operating state vector of the modelled anaerobic digestion process can be predicted with an overall accuracy of about 90%. This facilitates the application of state-based optimization and control algorithms on full-scale biogas plants and therefore fosters the production of eco-friendly energy from biomass

Item Type:	Article
Additional Information:	The definitive version of this article is available at doi: 10.2166/wst.2012.286
Keywords:	ADM1; anaerobic digestion; GerDA; optimal control; pattern recognition; state estimation; Callan Institute;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering
Item ID:	4152
Depositing User:	Sean McLoone
Date Deposited:	30 Jan 2013 16:55
Journal or Publication Title:	Water Science & Technology
Publisher:	IWA Publishing
Refereed:	Yes
URI:	http://www.iwaponline.com/wst/default.ht...
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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