WATER MANAGEMENT
The system automatically recalibrates the sensors
for DO, pH, ammonium, nitrate and potassium. The advantages for automatic scheduling and computer controlled end-point determination are obvious.
CONTINUOUS MEASUREMENTS OF SEVERAL PARAMETERS The system continuously measures the DO, ammonium, pH, temperature, conductivity and the interchangeable measures for nitrate and ORP. The operator can program the frequency of other
measurements for load (oxygen uptake rate), settlement, MLSS, toxicity, % nitrification and critical oxygen point determination. Combining the abovementioned data gives
List of the parameters that are measured
operator adjustable ranges to assure compliance whilst reducing energy consumption levels. The provision of automatic sampling and
measurement of additional predictors of bacterial performance such as % settlement gives an unprecedented level of plant monitoring, allowing operators and engineers to gain confidence in the change processes being managed on site.
the operator full confidence over the operation of the treatment system and allows the development of advanced controlled systems. It also helps to considerably reduce both aeration and other energy costs on site. n
For more information ✔ at
www.engineerlive.com/process
Michael Dooley is managing director of Strathkelvin Instruments.
www.strathkelvin.com
Automatic dosing system launched T
he Water Treatment Innovation Platform of NCH Europe has launched aquaDART, a package
of fluorescent traced water treatment products and monitoring equipment designed to accurately control the chemical dosing of water systems in industrial applications including food manufacturing, continuous production environments, commercial buildings and facilities.
Short for Direct Analysis Response
Technology (DART), aquaDART continuously monitors and adjusts the water treatment programme to ensure industrial water-cooling systems stay free of rust, corrosion, mineral scale and microbiological contamination. The system works in combination
with fluorescent dyes to precisely maintain dosing levels within tight control parameters. Each chemical inhibitor used in the dosing regime contains dyes in trace amounts (ppb level), making it invisible to the naked eye. An in-line fluorometer uses a beam of light to excite the fluorescent dye molecules, causing them to emit light at different wavelengths. Based on the intensity of the remitted
light, the system can adjust the feed rate automatically to control the concentration of inhibitor present in the cooling water. “Accurate dosing of water cooling systems has traditionally been a bug bear for many plant and facilities managers,” explains Dr Simona Vasilescu from NCH Europe. “Traditional inhibitors can be hard to control at the right levels. Over feeding the product can result in high operational costs and under feeding can result in aggressive corrosion or instant scale deposition. “We developed the aquaDART system to automatically measure the concentration and make micro adjustments in real time. It also offers remote monitoring and control software that can alert the operator if the inhibitor level is too high or low.” n
For more information visit
www.ncheurope.com
www.engineerlive.com 37
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