In the grain processing industry, fluctuations in the quality of the raw materials are a given. The earlier the fluctuations are determined, the better the chances are that adjustments and the associated costs, can be kept low.

1. Digital Re-print -
July | August 2014
NIR Multi Online Technology: Real-time analysis
for early detection of grain quality fluctuations
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3. F 26 | July - August 2014 GRAIN&FEED MILLING TECHNOLOGY
NIR Multi Online Technology:
Real-time analysis for early detection
of grain quality fluctuations
by Thomas Ziolko, Product Manager, Grain Milling,
Bühler AG in Uzwil, Switzerland
In the grain processing industry, fluctuations in the quality of
the raw materials are a given. The earlier the fluctuations are
determined, the better the chances are that adjustments and
the associated costs, can be kept low.
It also guarantees production of end products with consistent
quality. To assure this, real-time measuring at different points along
the entire process is needed.
Groupe Minoteries SA is counting on the timely process control
based on Multi-NIR by Bühler AG.
NIR spectrometry has been in use in the grain processing industry
to monitor quality for many years. More and more companies are
using the advantages of this technology, in the lab as well as online,
for controlling their ongoing production.
Continuous measurement
The true strengths of NIR really become evident when used
in its online version: The grain processing industry primarily takes
advantage of the real-time process optimisations it can make using it.
NIR continuously monitors the product quality, allowing to imme-diately
make an adjustment if necessary, which directly contributes to
the mill's profitability.
To ensure that the quality requirements for the end product are
met, for example, safety margins for protein, moisture or ash are
calculated in. The NIR Multi Online Analyzer from Bühler also pro-vides
the possibility to constantly optimise these safety margins with
support from the control functions and thus respond more quickly
to fluctuations in production.
With the simultaneous reduction of random sampling and labora-tory
analysis, costs can be additionally lowered.
Dilemma solved
In addition to classic referencing methods, NIR lab equipment
is used also for quality control in the laboratory at the Bruggmühle
Goldach AG, which belongs to Groupe Minoteries SA.
Daniel Götz, production manager at Bruggmühle Goldach AG,
was searching for technical solutions for making process adjustments
that would allow him to intervene in the event of a deviation at the
moment it occurred – without any delay due to time-consuming lab
analyses.
"A visual control of the Pekar slab sample has been insufficient
for meeting Q-requirements for a long time, but it was the only
means to determine deviations at the moment of occurrence and
to correct them."
Bruggmühle Goldach AG found a way out of their dilemma with
the NIR Multi Online Analyser MYRG for online analysis of grain,
flour and semolina.
The newest generation of Bühler NIR uses a spectrometer that
rates up to six different measuring points at the same time. The
advantage is obvious: the central spectrometer makes it possible to
perform real-time analyses of the raw material and end product at
up to six different measuring points, supplying the basis for smart
regulation of the ongoing production.
Dream fulfilled
For Daniel Götz, the possibility of directly analyzing the mineral
content with high accuracy while in production has become more
and more a sort of 'dream fulfilled' in view of the increasingly restric-tive
specification requirements.
After a six-month trial period, his original skepticism towards
applying NIR online has completely disappeared.
"Over just a short period, we collected enough data and experience
to eliminate all doubt that this is an NIR which surpasses all other known
devices up to now in terms of accuracy of the measurement data.
“Since then, we have been able to undertake adjustments multi-ple
times while grinding – adjustments which have been proven to be
correct in the lab two days later. With this NIR it is actually possible
to produce flour from the mill that is completely accurate in terms
of the specifications for mineral content.
“It represents an enormous simplification further on down the line."
The NIR Multi Online Analyser at the Bruggmühle Goldach AG
works with three measuring points; two sensors on the flour and one
on the whole grain.
"When we determined the measuring positions, we purposely
looked to place them as much at the beginning of the process as
possible," explains Daniel Götz.
"We don't want to use the NIR to measure the final quality. The
earlier in the process we analyse the contents, the more varied pos-sibilities
we have to influence our product quality.
“In the end, we want to not only increase the quality, but also in
conjunction with that, profitability,” he adds.

4. www.gencdegirmen.com.tr

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In this issue:
• NIR Multi Online
Technology:
Real-time
analysis for early
detection of
grain quality
fluctuations
• Feed Focus
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