Estimation and Control of WRRF Biogas Production

Tiina M. Komulainen (), Kjell Rune Jonassen and Simen Gjelseth Antonsen
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Tiina M. Komulainen: Department of Mechanical, Electrical and Chemical Engineering, Oslo Metropolitan University, Pilestredet 35, 0130 Oslo, Norway
Kjell Rune Jonassen: Veas AS, Bjerkåsholmen 125, 3470 Slemmestad, Norway
Simen Gjelseth Antonsen: Department of Mechanical, Electrical and Chemical Engineering, Oslo Metropolitan University, Pilestredet 35, 0130 Oslo, Norway

Energies, 2024, vol. 17, issue 23, 1-20

Abstract: The development of resource-efficient digital technologies is a critical challenge in the wastewater sector. This industrial case study, conducted in collaboration with the Veas Water Resource Recovery Facility in Norway, focused on creating data pre-processing methods and resource-efficient control strategies. Using data from the Veas biogas plant, dynamic models were developed to compare control outcomes. The primary objective was to maximize biogas production and hot water usage while maintaining optimal temperature and hydraulic retention time by adjusting inlet sludge and hot water flow rates. Sequential operations were approximated as continuous operations using a 30-min moving minimum/maximum for bimodal data and a 2-h moving average for noisy data. The data-driven dynamic models achieved an accuracy of up to R 2 of 0.85. The control strategy, which included one feedback controller, one ratio controller, and flow rate restrictions, was compared to real production data (baseline) and tested across six scenarios. The best improvement over the baseline scenario resulted in a 3% increase in total biogas production, a 6% increase in total organic loading, a 13% increase in hot water use, and a one-day reduction in hydraulic retention time. Future work should focus on control studies using extended datasets and nonlinear models.

Keywords: biogas; Water Resource Recovery Facility; estimation; dynamic modeling; control strategy development (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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