Modelling solution for estimating aeration energy of wastewater treatment plants
| Autor: | Lauri Pöyry, Petri Ukkonen, Michela Mulas, Anna Mikola |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Water Science and Technology, Vol 84, Iss 12, Pp 3941-3951 (2021) |
| Druh dokumentu: | article |
| ISSN: | 0273-1223 1996-9732 |
| DOI: | 10.2166/wst.2021.481 |
| Popis: | 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. HIGHLIGHTS An aeration system model based on valve positions was developed.; The model only requires calibration of one parameter.; Energy consumption can be estimated with only a limited information about the physical aeration system.; Valve positions impact the system power consumption and the air distribution between and within aeration grids.; Including valve positions opens possibilities to improve the aeration control strategies.; |
| Databáze: | Directory of Open Access Journals |
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