Measurement using cascades and O2-Sensor
Similar to the working principle of a biological treatment plant, in this WWTP simulation, the sewage is mixed with activated sludge under aeration and continuously lead through the drain cascade. On leaving the reactor cascade the remaining oxygen will be determined with the O2 sensor, whereby the volumes of waste water, activated sludge and air are specifically defined and monitored. With this method it is important to use the plants-own biomass to simulate the real biology of the particular waste water treatment plant. Hence, the measurement results have specific relevance relating to the WWTP and its unique properties.
The 
BioMonitor® regulates not only the optimal control of the oxygen input to the activated sludge reactors of the WWTP, but monitors the incoming contaminations of the WWTP's influent. This enables the operator to even out possible peak pollutions, thereby maintaining aeration at a regulated level. Usually, these peak pollutions cause additional aeration which is energy consuming and expensive.
