Water/Wastewater Energy-Efficient Control of a Deacidification
In Uevekoven, Germany, drinking water treatment contains a deacidification step with three separate aeration columns. Physical deacidification is realised in a downword flow of the water over packed columns, with a counterflow of air supplied by an external blower. The amount of carbon dioxide removed can be adjusted via the amount of air supplied by the blower. Frequent changes both in composition and quantity make an automated control system desirable.
To ensure energy efficient control of deacidification, it is vital to measure the lime concentration of the water coming out of the aerator columns; a high precision measurement is required for this type of control. The measurement and control system BalanceCon by Dr. A. Kuntze (Germany) is excellently suited for the task. It measures the pH of the water, while an integrated pump feeds part of the water via a marble filter to a second pH measurement device.
The stepmotor-controlled pump ensures a defined and constant contact time within the marble filter, so that water in the second pH measurement is definitely in a state of calcite equilibrium. Via the difference between the two pH measurements, the deacidification process can be controlled with a very high prescision. Changes between the two sensors are periodically determined by an automated zero calibration of the difference measurement. With the BalanceCon measuring and control system an accuracy of < 0.02 ph can be achieved.
Reader Reply Card No.
SonTek-IQ Irrigation Flow Meter Launch
SonTek, a Xylem (USA) brand, is pleased to announce the launch of the new SonTek-IQ Hi-tech flow meter, designed specifically to address the needs of the open channel irrigation market. The development of the SonTek-IQ leveraged the brand’s renowned expertise in pulsed acoustic Doppler technology and includes never-done-before flow modeling in small irrigation canals. The result is a device that is easy to
install, precise and the perfect fit for highly variable flow found in irrigation environments.
The SonTek-IQ determines flow velocity using four acoustic pulsed Doppler beams configured to allow the instrument to profile water velocity in three dimensions (3-D). The system also incorporates SonTek’s proprietary “SmartPulseHD”, an intelligent processing scheme originally developed for the award-winning RiverSurveyor product line.
Benefits of the new SonTek-IQ include: no need for calibration – simply place the IQ in a canal and it’s ready to collect accurate data, easy installation – no extensive construction required and innovative acoustic vertical beam and pressure sensor work in tandem provide robust water level data.
Reader Reply Card No. 144 Automated Water Quality Monitoring
ENMO hydro is a software system for the efficient control of automated water quality measuring networks. ENMO hydro offers new possibilities in an innovative software environment.
The functionality of the 100% web-based multi-tier-system comprises workflows for automatic sampling and quality assurance, the administration and control of equipment in the measuring stations, numerous options for data evaluation, illustration and export as well as a notification system. ENMO hydro furthermore complies with the requirements for a certification of the measuring network according to EN/ISO 17025.
ENMO hydro represents the newest developments in dynamic, continuous and automated water quality monitoring and thus makes an important contribution to the early detection of disasters or accidents as well as to the evaluation of hazard potentials.
Reader Reply Card No. 143 142
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Lovibond® Tintometer®
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Reader Reply Card No. 145
www.envirotech-online.com IET March / April 2012 more than 110 methods
Photometer MaxiDirect High precision interference filters Automatic wavelength selection
methods
Waterproof Mobile
Reader Reply Card No. 146
QUALITY Made in GERMANY
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