What is the working principle of the biological cleaning?
The elimination of nitrogen – mainly chemically bounded in ammonium – happens through biochemical reactions. In aerobe conditions, ammonium is oxidized via nitrite to nitrate by nitrification. After recirculation into an anaerobe tank, nitrate is reduced to elementary nitrogen by denitrification. Hence, the described process takes place very often conversely to the structural arrangement of the tanks. This means that parts of the wastewater passing through twice. This so called activated sludge process requires the recirculation of produced nitrate from the aerobe into the anaerobe basin. Here, process monitoring concentrates on measuring ammonium (NH4), nitrate (NO3) and oxygen (O2). For this, our stable ISE sensor and the calibration free oxygen sensor are advisable. The additional control of total suspended solids (TSS) within the activated sludge is helpful, as an optimal concentrations of solids leads to higher nitrification, denitrification and phosphate elimination. Besides our suspended solids sensor also the turbidity sensor can be used. Both sensors convince by an integrated automatic ultrasonic cleaning. To measure NO3, TSS and carbon parameters like COD, we recommend our reagent free optical spectral probes.
Cleaning of ISE electrodes easy and simple (View on YouTube)
Simple and fast cap change of the oxygen sensor FDO® (View on YouTube)
The integrated ultra sonic cleaning of the solids/turbidity sensor reduces your maintenance costs (View on YouTube)
Air pressure compensation of ISE sensors: automatically, effective, visible (View on YouTube)