Performance Comparison of a Self-Cleaning and a Conventional pH Electrode in Wastewater Process Monitoring

• Abstract:

  Accurate pH measurement is vital in wastewater treatment for effective process control and regulatory compliance. This study compares a self-cleaning pH sensor (HORIBA 6122 series) with a conventional glass electrode, installed in parallel at a wastewater treatment facility in Metro Manila, Philippines. Over a 97-day period, 2,324 paired readings were recorded. Statistical analysis revealed a significant difference (t(2323) = 56.88, p > 0.05) in mean values (HORIBA = 6.93, conventional = 6.12). The HORIBA sensor exhibited lower variability (HORIBA = 0.2335, conventional = 0.6461) through time, indicating better stability. These results align with the goals of Process Analytical Technology and support the deployment of self-cleaning sensors for real-time wastewater treatment monitoring.
• Download:

  IMEKO-TC8-11-24-2025-042.pdf
• DOI:

  tc24-2025.042

Event details:

• IMEKO TC:

  TC24
• Event name:

  IMEKO TC8, TC11 and TC24 Conference
• Title:

  Joint conference of the TCs ‘Traceability in Metrology’ (IMEKO TC8), ‘Measurement in Testing, Inspection and Certification’ (IMEKO TC11), and ‘Chemical Measurements’ (IMEKO TC24).

• Place:

  Torino, ITALY
• Time:

  14 September 2025 - 17 September 2025