"Online" measurement for monitoring water resources
Glossary of ETL Verfahrenstechnik GmbH
Online measurements are essential for monitoring global water resources, especially given the increasing water demand in industrialized countries and the limited availability of water reserves. Legal requirements for continuous improvement of drinking water quality and the reduction of permissible pollutant levels in wastewater emphasize the necessity of this technology.
In wastewater treatment plants, online measurements are a key component for continuous monitoring of parameters such as ammonium, phosphate, and nitrate. They are also used to monitor drinking water, wastewater, surface water, and process water. These measurements, combined with specialized analytical technology, offer comprehensive solutions for the entire water cycle. They regularly collect critical data, as specified, and are used in applications ranging from drinking water surveillance to industrial processes.
Online measuring systems or analyzers are configured to specific threshold values. When deviations occur, they either automatically trigger corrective action or signal the control center that measures are required. The precise positioning of the filter membrane to produce high-quality permeate is critical for the accuracy and continuity of online measurement.
Example: Aeration Tank / Biological Treatment
In aeration tanks, permeates of appropriate quality are continuously analyzed online for their nitrogen and phosphorus content. These measurement values serve as important control variables. If a measurement exceeds predefined internal limits (as defined by regulations)—for example, for nitrate nitrogen—the recirculation pumps are automatically set to maximum capacity. This means that the pumps send the sludge-water mixture back to the beginning of the aeration process with full force to lower the levels through extended retention times using denitrification or nitrification processes.
Sample filtration to produce high-quality permeate is performed continuously by the filtration system for the online analysis unit. The treated permeate is then directed to the respective online measuring system. The measurement intervals can be individually adjusted but are typically set to approximately 10 minutes.
It is important that the set threshold values correspond to those of the wastewater plant outlet in order to avoid exceedances. Effluent measurement stations, also equipped with online measuring systems, monitor the quality of the permeate before it is returned to the water cycle.
Summary:
Online measurements, carried out using online analyzers or online monitoring systems, are indispensable tools for monitoring global water resources. In a world with increasing demand for water and limited reserves, they are exceptionally important. Their primary application is in wastewater treatment plants, where they continuously measure critical parameters such as ammonium, phosphate, and nitrate. Programmed to predefined threshold values, these systems can automatically respond to limit exceedances or trigger warning signals. The accuracy of these measurements depends heavily on the correct positioning of the responsible sensors or probes and the quality of sampling, including sample preparation.
ETL Verfahrenstechnik GmbH: Your Expert for Online Measurements in Water Resource Monitoring
ETL Verfahrenstechnik GmbH is your competent partner for the complex task of continuous monitoring of water quality and resources. We set new standards in the precise measurement of critical parameters such as ammonium, phosphate, and nitrate by providing high-quality permeate for modern online analyzers and measurement systems.
As a pioneer in the development and manufacturing of advanced filtration systems, we offer a wide range of solutions specifically tailored to the demands of water and wastewater monitoring. Our systems are characterized by robustness, durability, and precision—supported by our many years of expertise and deep understanding of measurement technology.
Our systems are ideal for monitoring drinking water quality, efficiently managing wastewater treatment plants, and measuring critical parameters in industrial processes. Rely on the dependable and precise technology from ETL Verfahrenstechnik GmbH to meet your specific needs in the field of online measurement.