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Clean-In-Place (CIP) Applications
CIP is the method used in sanitary processing plants
to clean tanks, piping and even workspaces between
production batches by automatically recirculating
detergent and rinse solutions. The washing process
consists of several cycles in which rinsing material is
recycled through the vessels, pumps, valves and other
process equipment in the flow system.
A Near Infrared (NIR) absorption or scattered light
sensor is typically installed at the CIP return points
where it is beneficial to measure the exact interface on
rinse water push-outs and the clarity/quality of the
final rinse water. Inline photometers can also be used
to monitor the sanitizer concentration, to control the
CIP process, for validation routines and in some cases,
to monitor the residual after cleaning. Validation of
cleaning procedures is of utmost importance to the
pharmaceutical, food and specialty chemicals industry,
while optimization of sanitizer usage offers significant
cost savings
CIP Return Water Clarity
Monitoring |
The quality of clean-in-place solutions can be
monitored with an optek VIS Absorption or scattered
light sensor installed at the CIP return point,
depending in the nature of the product residue. The
inline sensor can monitor the concentration of
constituents in the water and detect
acceptable/unacceptable contamination levels for
recovered pre-rinse, while minimizing cycle time.
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The CIP return sensor can be configured to enable a
unique interface changeover point and final clarity. The
product to water and CIP clarity levels can be monitored
in real time. Based on the sensor output, it can divert
the stream to recovery waste holding tanks, or to drain.
Product can be recovered for reprocessing or the
solution could be salvaged for CIP pre-rinse, saving
countless gallons of water. This can dramatically reduce
BOD costs or save otherwise lost product.
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| Sanitizer Concentration |
Obtaining instantaneous measurement of the active
sanitizer concentration in the cleaning solution is of
great importance. In each cycle, the concentration of
the active material increases until a steady state is
reached and the wash cycle is considered to be complete.
A new batch of rinsing material is then loaded and the
same process is repeated. For maximum efficiency, the
cycling should be stopped when the concentration of the
active material reaches a plateau. Continuing the wash
past this point is ineffective.
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Chemical concentration has always been a difficult
measurement using traditional conductivity sensors.
Changes in pH and temperature, or the presence of
unexpected compounds can all have an effect on
conductivity-based devices. This may affect response
times as well. To compensate for these issues, plant
operators often overdose chemicals to ensure adequate
sterilization, and then extend line flushes to insure
its removal.
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By installing an optek UV or VIS absoprtion sensor
on the feed line, you can monitor and control the exact
concentration of the feed. This provides the system with
controlled cleaning and optimal performance, while
reducing chemical usage. These sensors are also
compensated to eliminate any influence from turbidity or
the presence of other compounds. Through immediate
response time, sanitizer and water usage is also greatly
reduced.
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Clean-In-Place (CIP)
Applications Summary |
This is a very popular and cost-saving application
for optek inline photometers. In numerous worldwide
installations, optek systems have proven to be the
fastest and most precise method to monitor CIP. The
amount of product recovered and water saved by the
implementation of optek CIP monitors has provided plants
with a typical payback within the first six months of
installation
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