We have already shipped several COD meters this year to clients around the globe, which will be used in wastewater treatment plants at breweries. In wastewater treatment, the Chemical Oxygen Demand (COD) is an important measurement for the amount of oxygen that is required to break down pollutants (organic substances) in water. The recently shipped analyzers will be used for COD measurement in WWTPs of breweries and soft drink producers in Nigeria, the United Kingdom, Algeria among others.
COD meters installed in a pipe line (left) and in a sump (right)The wastewater treatment plants are using the Model 9585 COD meter in a pipe line, reservoir or launder to optimise and protect their biological purification process. All applications of this model are found in the influent stream of the treatment facility. The COD value is continuously available (on the screen of the analyser) and is not affected by the hardness, the presence of detergents like caustic nor suspended solids. Besides COD, the suspended solids load of the water can also be monitored as additional process parameter
The chemical oxygen demand can be measured using different methods, direct or indirect. Regularly the COD value is determined by means of samples that are analysed using laboratory test methods. These off-line methods can be time consuming while the COD value is an essential parameter in the biological treatment process.
The quickest method for COD measurement is through the use of in-line process equipment. The sensor of this instrument is placed directly into the process stream, which means that the chemical oxygen demand can be monitored continuously, directly and real-time. The COD value is displayed at the instrument without any time delay and can be used for process control purposes, improving the efficiency of the biological treatment process. Additionally this product can be used as an early warning system in case of unexpected process changes.
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