Sensor validation and reconciliation for a partial nitrification process

C. K. Yoo, K. Villez, I. B. Lee, S. Van Hulle, Peter A. Vanrolleghem

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Wastewater treatment plants (WWTP) are notorious for poor data quality and sensor reliability due to the hostile environment in which the measurement equipment has to function. In this paper, a structured residual approach with maximum sensitivity (SRAMS) based on the redundancy of the measurements is used to detect, identify and reconstruct single and multiple sensor faults in a single reactor for high activity ammonia removal over nitrite (SHARON) process. SRAMS is based on inferences, which are insensitive to the faults in the sensor of interest and sensitive to faults in the other sensors. It is used for four types of sensor failure detection: bias, drift, complete failure and precision degradation. The application of sensor validation shows that single and multiple sensor faults can be detected and that the fault magnitude and fault type can be estimated by the reconstruction scheme. This sensor validation method is not limited by the type or application of the considered sensors. The methodology can thus easily be applied for sensor surveillance of other continuously measuring sensors and analysers.

Original languageEnglish
Pages (from-to)513-521
Number of pages9
JournalWater Science and Technology
Volume53
Issue number4-5
DOIs
StatePublished - 2006
Externally publishedYes

Keywords

  • Data reconstruction
  • Fault detection and identification
  • Nitrogen removal
  • Sensor validation and reconciliation
  • Smart sensor

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