• in-situ ISE sensors
• in-situ UV/VIS probes
• Analyzers

Wastewater treatment processes are concerned with controlling the energy efficient removal of pollutants in the smallest possible space in the shortest possible time.

Measuring method for tracing nitrogen elimination:
Up to date a common measuring method is targeted at oxygen availability. As oxygen is required for nitrification subprocesses, but prevents denitrification, this process parameter is determined online and traced. It is often used for controlling the oxygen input or aerator aggregates.
Redox inflexion point determination has become less significant as an indirect controlled and actuation variable due to the generally known difficulty (i.e. unclear curve progression). Direct measuring procedures for the process measuring ammonium and nitrate are far more interesting. The immediately available parameters allow the control to be directly optimized. This guarantees efficient wastewater purifications. This results in reduced energy costs.

The dynamics of the controlable process and the used measuring system are of great importance for the measuring and control technology. Here applies: the faster the control process and disturbance variables, the shorter recognition times are expected from the measuring system.