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Two is better than one

Random sample measurements leave nothing to chance

External circumstances, such as heavy rain, chemical pollutants and non-permitted waste in the inflow, can heavily impede the wastewater treatment process at a wastewater treatment plant. It is necessary to respond to these fluctuations and the process must be adapted accordingly in order to ensure sufficient quality of the purified wastewater and suitable energy consumption.

Service engineer doing oxygen measurements in an aeration basin with the Liquiline Mobile CML18 ©Endress+Hauser

Customer benefits

  • Quick, flexible on-site measurements to address deviations

  • Verification of on-line measured values

  • Digital documentation using the Memobase Pro App

  • Cost savings through optimized aeration processes

The challenge

One step in the cleaning process involves using bacteria to break down dissolved organic substances in the wastewater. To ensure optimal bacterial growth in the aeration basin, air is continuously supplied. This requires regular monitoring of the oxygen levels in the aerated section of the basin. Insufficient air can hinder the growth of ammonia-degrading bacteria, compromising cleaning quality. Conversely, excessive air can lead to high oxygen levels, increased energy use, and higher costs.

Our solution

The Liquiline Mobile CML18 handheld device, connected via the CYK10 cable, allows measurement of pH, conductivity, and oxygen using various sensors. These sensors enable direct process measurements, with the watertight Memosens connection ensuring secure data transmission. Measurements can be synchronized with the Memobase Pro App for documentation. Stable oxygen values require in-process measurements during ventilation to prevent bacterial consumption of oxygen.

Measuring instruments used

  • CML18-AAACA1 and CLL47E-8APL30

  • CML18-AAACA1 and COL37E-8A24ACLB1

  • CML18-AAACA1 and CPL51E-8A7AHH2

  • Bumper for 12-mm-sensors, 71638868