Water / Wastewater


New Self-Cleaning Nitrate Analyser For Water Quality Monitoring Saves Time & Money


Offering a precision nitrate ISE electrode sensor with an integral self-cleaning sprayer, the new HYDRA Nitrate Analyser System from Electro-Chemical Devices, Inc. (ECD), is ideal for nitrate monitoring in wastewater treatment aeration basins.


The HYDRA Nitrate Analyser System monitors the nitrification process in aeration basins at wastewater treatment plants, a process during which toxic ammonium ions are oxidised into much less toxic nitrate ions using an aerobic activated sludge process. De-nitrification reduces the nitrate ion (NO3 nitrogen gas (N2


-) to basin or in a separate anaerobic digester. The NO3


) by an anoxic reaction in the same treatment --N


measurement helps optimise the methanol being fed to the digester, minimising cost, and also provides a trend indication of the total nitrogen (TN) in the euent.


The intelligent HYDRA Nitrate Analyser System measures the concentration of dissolved nitrate as nitrogen (NO3 in water. The sensor uses two electrodes to determine the NO3


--N concentration: a nitrate ion electrode and a chloride ion electrode. An optional electrode is also available for pH or ammonium measurement.


The nitrate ion electrode provides the primary measurement. A second electrode measures the Chloride ions in the sample which interfere with the nitrate electrode. The HYDRA Analyser subtracts the appropriate amount of signal from the nitrate measurement for accurate monitoring. The sensor also detects temperature, and the analyser provides a temperature-compensation calculation for accurate measurement.


The ECD HYDRA Analyser nitrate sensor offers 1.25-inch NPT rear facing threads for attaching an extension/ immersion tube for easy installation from catwalks or handrails. Internal signal conditioning allows the sensor to be mounted up to 200 meters from the analyser. The sensor is extremely low-maintenance, featuring a movable electrode guard to facilitate easy electrode replacement when necessary.


Adding the optional AC10 Automatic Sensor Cleaner decreases HYDRA Analyser sensor maintenance cycles and helps maintain sensor measurement accuracy in turbid water conditions by preventing the buildup of biofilms and other soft coatings. The AC10 cuts plant operating costs by reducing manual cleaning time and the amount of chemicals used for unnecessary water treatments performed due to inaccurate sensor readings caused by films and coatings that develop over time.


The AC10 can be used as either a Single Channel or Dual Channel System with the HYDRA Nitrate sensor. Combined with a Sensor Spray Head and a C22 Analyser/Controller, it uses pressurised air to generate an area of high turbulence in the water surrounding the measurement end of the sensor.


The system’s HYDRA Analyser is configured to periodically actuate a cleaning cycle using the integral spray cleaner in the nitrate sensor, minimising the formation of biofilms or other coatings on the electrodes and keeping maintenance to a minimum.


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28592pr@reply-direct.com Water Management Software


KISTERS AG (Germany) is expanding its WISKI software substantially to include essential components: the measuring data management system of the Aachen-based software firm for water management, now processes sampling data (metadata) and the accompanying physico- chemical water quality information along with the usual hydrological values. Governmental authorities, water boards and research facilities will greatly benefit from this development. With the expansion of the KiWQM water quality module, WISKI is now a communal database for different departments, which enables to have a full picture of the state of the water and efficiently steer the data management processes.


WISKI is established in the market as an information system for water management. With the expansion of the measuring data management as regards the input,


management and analysis of water quality data, WISKI has increased its field of operation. A major plus is the correct assignment of the confidential water quality information which includes the concentration of pollutants, amount of bacteria, oxygen content, conductivity or pH values to the continuously captured hydrologic and meteorological data; such as levels, flow velocity, rainfall or temperature. Quantitative and qualitative data from surface or groundwater can be assessed together and derived indicators, for example, loads can be calculated.


Hydrologic values are continuously collected, while the chemical water quality parameters from the taken samples are only updated after analysis in the laboratory, so thus are “delayed” in being calculated in the measuring data management system. Despite this time delay, the WISKI water quality module is able to allocate the hydrologic measuring value findings of the test analysis to validate the data automatically and to calculate the resulting correlations.


National, regional and local institutions with separate departments for hydrology and water quality now have the chance with WISKI to manage and assess quantitative and qualitative water data in a single and communally-used database application. Clearly-defined usage, simplified data exchange with faster and more efficient work processes ensures a holistic view of water as a medium.


It is possible to update the software even further with KiECO components and also reflect the ecological aspects. The water analysis is supplemented by biological data from field studies. Taxonomies are available to classify the observed flora and fauna. Users then have the possibility to come to an overall conclusion about the water quality.


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For More Info, email: 29337pr@reply-direct.com --N) New Purge and Trap Analyser


Chromatotec (France) has developed an analyser for identification and measurement of volatile organic compounds in air and water. The Purge & trap system extract VOC compounds from water in compliance with 502.2 method (US EPA: 60 compounds).


This solution is convenient for a wide range of applications such as: raw source water, river water, seawater, rain water, finished drinking water, bottled water analysis and surface water. More specifically, the detection range varies from 0.5 to 20µg/L for surface water and for finished drinking water.


In order to be analysed, 5mL of water sample are inserted inside a sparger. Then, an inert gas (e.g. nitrogen) is used to purge the sample and to send the gaseous compounds to the detector. Finally, the detector identifies and quantifies the compounds. The sampling time takes 11 minutes and an automatic rinse is done after the measurement.


This cabinet is the perfect solution for all kind of water analysis or surveillance. 28710pr@reply-direct.com


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7


“ A real alternative to ultrasonics at an amazingly reasonable price.“


Technology with a vision: Radar level measurement specifically for the water and sewage sector.


The radar sensor VEGAPULS WL 61 is ideal for any applications involving gauge, level and flow measurement.


Completely unfazed by weather or surface conditions, radar technology delivers precise monitoring of water levels, ensuring reliable measurement data and maintenance-free operation.


IFAT 2014: Hall A5, Stand 227/326


Mobile to the site: www.vega.com/wastewater


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2006ad@reply-direct.com www.envirotech-online.com IET March / April 2014


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