Online Instrumentation - WTW.com

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Efficient sludge control and monitoring of treatment
plants
Sludge level measurement is a very common application in
wastewater treatment:
Typical measurement locations in a wastewater treatment
plant are pre-sedimentation, thickener and post-sedimentation.
The process tanks of the pre-sedimentation and post-sedimentation
specifically can be designed very differently.
Generally circular and rectangular, elongated tanks can be
found. The sludge settles in these tanks. Skimmers ensure
that the sludge collects in hoppers until it is ultimately
removed. The sludge level measurement primarily supports
• The optimization / control of the (primary) sludge
extraction
• The management of the return sludge
• Monitoring of the settling behavior
• The prevention of sludge loss
The latter can sometimes lead to exceeding limits in the
drainage. A costly scenario, which must be prevented.
Reliable ultrasonic measuring principle
The IFL 700 IQ is based on the ultrasonic measuring
principle, wherein the determination of the sludge level
over the duration of the echo is determined. Unlike optical
sludge level measurement systems, this continuous measurement
principle offers important benefits that are shown by
lower capital and operating costs, less maintenance and
higher data availability.
For information visit www.WTW.com for a customer care center near you
Sludge level
The non-contact stripper keeps the
ultrasonic generator free from air
bubbles and outgrowth
Parameter
section
Conductivity pH/ORP Dissolved
Oxygen
Nitrogen Turbidity/
Suspended Solids
Sludge level Phosphate Carbon: COD/TOC/
DOC/BOD/SAC
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