BOD Analyzer for Controlling WWTPs

LAR’s BioMonitor is an online BOD analyzer for the determination of biochemical oxygen demand (BOD), respiration and toxicity in waste water. Using BioMonitor, operators can control their waste water treatment plant in an optimal way.

Features and Benefits

  • Measurement range: 1-200.000 mg/l BOD, 0-100 % Toxicity, Respiration in mg O2/l x min
  • Response time: 3-4 min. (customizable)
  • High degradation
  • Sludge activity
  • Using the plant’s own biomass
  • No memory effects


LAR’s biological oxygen demand analyzer is suitable for optimal waste water treatment plant controlling:

  • Environmental protection
  • BOD monitoring
  • WWTP control


Using analyzer options, the measurement system is adaptable for every measurement challenge.

  • FlowSampler


For safe operation in hazardous areas, there are different protection housings available:

  • IP54 (Standard)

The total BOD. What matters.

In contrast to the standard BOD5 method the BioMonitor measures the total BOD. In the BODmeasurement nitrification inhibitors are added to the sample, which suppress the degradation of nitrogen compounds. This results in the determination of the degradation of carbon compounds (carbonaceous-BOD) only and the nitrification part is not considered in BOD5 measurements.

As a waste water treatment plant can be reliably controlled and monitored only by the determination of total BOD, the BODis insufficient for this purpose.

Alternatively to the BOD5 measurement LAR AG provides an online respirometer, which operates like a miniature waste water treatment plant: The BioMonitor.

The BOD analyzer degrates nitrogen and carbon compounds in special waste water cascades, so that the meaningful total BOD can be determined within 4 minutes.

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LAR Process Analysers AG
Neuköllnische Allee 134
12057 Berlin

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