Applying variable dissolved oxygen set point in a two level hierarchical control structure to a wastewater treatment process

I. Santín, C. Pedret, R. Vilanova

Research output: Contribution to journalArticleResearchpeer-review

77 Citations (Scopus)

Abstract

© 2015 Elsevier Ltd. All rights reserved. This paper presents a two-level hierarchical control structure for biological wastewater treatment plants, with the goal of improving effluent quality and reducing operational costs. The Benchmark Simulation Model No. 1 is used as working scenario. The hierarchical structure allows to adjust the dissolved oxygen in the fifth tank (SO,5) according with the working conditions, instead of keeping it in a fixed value. Model Predictive Control (MPC) with inlet flow rate feedforward control (MPC + FF) is proposed for the lower level to control nitrate nitrogen concentration of the second tank and SO,5. MPC, Affine Function and fuzzy controller are tested for the higher level to adjust the SO,5 set point of the lower level based on the ammonium and ammonia nitrogen concentration in the fifth tank. Modifying the tuning parameters of the higher level, a tuning region is determined, in which the effluent quality and operational costs are simultaneously improved.
Original languageEnglish
Pages (from-to)40-55
JournalJournal of Process Control
Volume28
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • BSM1 benchmark
  • Fuzzy control
  • Hierarchical control
  • Model predictive control
  • Wastewater treatment process

Fingerprint

Dive into the research topics of 'Applying variable dissolved oxygen set point in a two level hierarchical control structure to a wastewater treatment process'. Together they form a unique fingerprint.

Cite this