Back
On-line titration of non-ionic surfactants in wastewater treatment plants using a specific electrode
Journal article

On-line titration of non-ionic surfactants in wastewater treatment plants using a specific electrode

  • Feitkenhauer, H. Laboratorium für Technische Chemie, ETH Zürich, HCI, CH-8093 Zürich, Switzerland
  • Meyer, U. Laboratorium für Technische Chemie, ETH Zürich, HCI, CH-8093 Zürich, Switzerland
Published in:
  • Water Science and Technology. - IWA Publishing. - 2002, vol. 45, no. 4-5, p. 61-68
Environmental Engineering
Water Science and Technology
English Textile finishing industry wastewater often contains high concentrations of surfactants. Non-ionic surfactants like alcohol ethoxylates are among the most used surfactants and are discharged from batch-processes in widely varying concentrations. The anaerobic biomass and especially methanogenic microorganisms have been shown to be inhibited by surfactants. To protect these microorganisms from irreversible inhibition a measurement of the surfactant concentration is useful for the process control, but most analytical methods are too complicated and expensive for an on-line process control. It was shown that the titration of non-ionic surfactants is possible in the presence of biomass and in wastewater from textile wet processes using the Metrohm NIO-electrode. Titration and sampling were successfully performed with standard equipment. The software used for the process control of a lab-scale anaerobic treatment plant was also used to evaluate the obtained titration curves. This allowed performing the titrations without using a more expensive titrator.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/267934
Statistics
Document views: 6 File downloads: