Online Instrumentation - WTW.com
Online Instrumentation - WTW.com
Online Instrumentation - WTW.com
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Applications<br />
The most important measuring points of wastewater treatment<br />
Plants for COD measurements are the inlet and outlet.<br />
To determine the in<strong>com</strong>ing load of the plant, a CarboVis ®<br />
sensor is positioned in the inlet. The load found in the outlet<br />
of the plant is low. With a “CarboVis ® ” installed there (possibly<br />
with integrated total suspended solids measurement),<br />
the cleaning performance of this plant can be monitored<br />
well. The NiCaVis ® <strong>com</strong>bination sensor is also suitable for the<br />
outlet. It measures the carbon content as well as the nitrate<br />
concentration. Or NiCaVis ® NI triple sensor, which determines<br />
the carbon content, nitrate and nitrite.<br />
Measuring principle UV-VIS<br />
Messprinzip 1 Light source UV-VIS<br />
General setup of spectral sensor<br />
21 Lichtquelle<br />
Sender of the optical system<br />
32 Sendeoptik Measuring gap between the measurement windows<br />
34 Messspalt Receiver of zwischen the optical den system Fenstern<br />
45 Empfangsoptik<br />
Detector<br />
56 Detektor Measuring beam<br />
67 Messstrahl Reference beam<br />
78 Referenzstrahl<br />
Connector for the optional <strong>com</strong>pressed air cleaning system<br />
TITANIUM<br />
Q UALI TY<br />
For information visit www.<strong>WTW</strong>.<strong>com</strong> for a customer care center near you<br />
Carbon<br />
Clean measuring windows - a prerequisite for reliable<br />
optical measurements<br />
Fouling on the measuring windows can easily simulate high<br />
concentrations in COD measurement systems. Once the<br />
dirt has settled on the measurement windows, the continued<br />
build-up of dirt particles will progress at increasing<br />
speed. Especially the use in treatment plants with strong<br />
fouling problem from the growth of microorganisms or the<br />
deposit of dirt on the measurement windows presents a<br />
real challenge to the optical online measurement technology.<br />
The integrated, permanently operating ultrasonic cleaning<br />
of the measurement windows, which is integrated in all<br />
spectral <strong>WTW</strong> sensors as a standard very effectively and<br />
gently prevents the growth of all types of dirt/fauling from<br />
the start. This guarantees a permanently reliable online<br />
measurement.<br />
Parameter<br />
section<br />
Conductivity pH/ORP Dissolved<br />
Oxygen<br />
Nitrogen Turbidity/<br />
Suspended Solids<br />
Sludge level Phosphate Carbon: COD/TOC/<br />
DOC/BOD/SAC<br />
59
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