Modelling solution for estimating aeration energy of wastewater treatment plants

Lauri Poyry, Petri Ukkonen, Michela Mulas, Anna Mikola*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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 WWTP's. 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 WWTP's. 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.

Original languageEnglish
Number of pages11
JournalWater Science and Technology
DOIs
Publication statusE-pub ahead of print - 3 Nov 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • aeration
  • dynamic model
  • energy efficiency
  • wastewater
  • SYSTEMS
  • BLOWER

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