Modelling solution for estimating aeration energy of wastewater treatment plants

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-12-15
Major/Subject
Mcode
Degree programme
Language
en
Pages
11
3941-3951
Series
Water Science and Technology, Volume 84, issue 12
Abstract
Energy costs in the wastewater industry are increasing due to increasing trends in electricity rates and more stringent requirements for effluent quality. Wastewater aeration process is typically the largest energy consumer of the treatment plant and the optimization of the aeration process can offer significant savings for the wastewater treatment plants (WWTPs). Utilization of dynamic models can offer optimization solutions for improving the energy efficiency and process performance. In this work a simplified modelling approach emphasizing the control valves and the blowers is tested by developing aeration system models for two Finnish WWTPs. The developed model requires calibration of only a single parameter and the results from the simulations showed that reasonable estimations of the aeration systems energy demand could be made with a limited knowledge on the details of the physical system. The promising results highlight the strong influence of the control valve positioning to the whole system and indicate that airflow distribution along the system could be estimated simply from the positioning of the valves. The presented modelling approach allows the comparison between different blower and control valve alternatives during operation and for the process upgrades and offers prospect for improving the aeration operation control strategies.
Description
Keywords
aeration, dynamic model, energy efficiency, wastewater, SYSTEMS, BLOWER
Other note
Citation
Poyry , L , Ukkonen , P , Mulas , M & Mikola , A 2021 , ' Modelling solution for estimating aeration energy of wastewater treatment plants ' , Water Science and Technology , vol. 84 , no. 12 , pp. 3941-3951 . https://doi.org/10.2166/wst.2021.481