News

Protect your Cooling Cycle

Thermal energy transfer is one of the most important processes within industry. Therefore, monitoring the cooling system is essential for efficient production.

cooling scheme with toc analysis

TOC analyser QuickTOCultra meets the requirements for any cooling water challenge

Thermal energy transfer is one of the most important processes within industry. Therefore, monitoring the cooling system is essential for efficient production. For this purpose, several parameters were defined and regulated such the total organic carbon (TOC).

LAR's QuickTOCultra is the appropriate TOC analyser for any cooling water challenge. Its robotic, horizontally, and vertically moving injection needle takes an exact sample dose and injects it into the oven. Thus, organic particles are also considered within measurement. A huge advantage when fresh water from surface water is used. In the oven, the sample is combusted at 1200°C. Due to the high temperature, the organic content is completely oxidised to CO2. Hence, operators do not need expensive oxidation promoting catalysts. The entire TOC measurement cycle takes place in less than 3 minutes. LAR's TOC analyser allows to measure up to six sample streams in one unit. Thus, the inlet and outlet of the cooling cycle can be monitored in one single analyser. Differences in TOC that arise for example due to leakage or product spills are detected quickly. Thus, operators can take countermeasures to protect the cooling cycle as well as the environment.

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