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Fast Online BOD Measurements

LAR's BioMonitor is an online BOD analyzer for the determination of the total biochemical oxygen demand (BOD). The analyzers' functional principle is similar to a miniature biological waste water treatment plant.

Online BOD analyzer BioMonitor

LAR's BioMonitor is an online BOD analyzer for the determination of the total biochemical oxygen demand (BOD). The analyzers' functional principle is similar to a miniature biological waste water treatment plant. The waste water to be tested is mixed with the plant's own activated sludge and air and continuously passed through a multistage measurement cascade. Upon exiting the cascade, the residual oxygen is measured with an oxygen sensor. Due to the usage of the plant's own sludge, the BioMonitor delivers direct information on the treatment processes and thus, allows the highest applicability on the real process. In contrast to the commonly used BOD5 measurement, that needs 5 days and measures the carbonaceous-BOD only, LAR's BOD analyzer determines the Total-BOD of a sample within minutes. The total-BOD reflects the degradation of nitrogen as well as carbon compounds. The fast and representative BOD analysis allows operators to control their waste water treatment effectively. Moreover, due to nutrient dosage and/or aeration strategies enormous cost savings can be realized.

The total organic carbon (TOC) is one of the most important sum parameters in the assessment of the organic pollution of water. Since it includes all carbon compounds as one mass, it is exactly defined and an absolute quantity. Therefore, it may be determined directly.

Read more about TOC measurement methods.

Total organic carbon analyzers of LAR Process Analysers AG

The chemical oxygen demand (COD) indicates the amount of oxygen which is needed for the oxidation of all organic substances in water and is thus an important indicator for water analysis. It is considered in the planning and controlling of treatment, as well as assessing its efficiency, thus forming the basis for the calculation of waste water charges.

The COD can be determined in laboratory or online, whereby these methods significantly differ in duration and consumables used.

Read more about COD measurement methods.

COD analyzers of LAR Process Analysers AG

The biochemical oxygen demand (BOD) indicates the amount of oxygen which is needed for the biological degradation of organic substances in water.

Since the generally used BOD5 excludes the nitrification part of the process, this parameter is poorly suited for the control of waste water treatment plants. Alternatively, the total BOD is well-suited, due to the determination of the nitrogen as well as the carbonaceous part of biological degradation.

Read more about the online measurement of BOD.

Toxicity is described as the direct harmful effect of a substance on organisms. These effects can already occur at low concentraions of toxic substances and are dependent on the incubation period and the dosage.

Some test methods that are available on the market can detect toxicity by using fish, daphnia, molluscs, algae or luminous bacteria and testing whether a water sample has a toxic effect on the organisms. They do not, however, identify exactly which toxins are present.

Read more about online toxicity measurements.

BOD / toxicity analyzers of LAR Process Analysers AG

The total nitrogen bound (TNb) shows the pollution of water caused by nitrogen compounds. Nitrogen may be present as ammonia, ammonium salts, nitrites, nitrates and organic nitrogen compounds.

In contrast to single measurements of the above-mentioned components, the TNb determination contains all these substances in a single analysis process.

Read more about online TNb measurements.

The total phosphorus (TP) is a sum parameter that shows the organic and inorganic phosphorus compounds in water. Phosphorus is an essential nutrient for humans as well as flora and fauna. However, the substance – depending on its concentration– may cause serious damage.

Read more about online TP measurements.

TN TP analyzer of LAR Process Analysers AG