Preserving grain weight and quality whilst preventing insect infestation, mold presence and therefore avoiding dangerous toxins. The grain cooling techniques were developed by scientists originally with the target of temporary keeping the grain safe with higher moisture contents till their drying process, thus managing larger amounts of grain with existing driers. Later on, the grain cooling showed many more advantages. Wheat and corn were the targeted products at the beginning.

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March | April 2014
Conserving grains through drying
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3. P
reserving grain weight and quality whilst prevent-
ing insect infestation, mold presence and therefore
avoiding dangerous toxins. The grain cooling
techniques were developed by scientists originally with
the target of temporary keeping the grain safe with higher
moisture contents till their drying process, thus managing
larger amounts of grain with existing driers. Later on, the
grain cooling showed many more advantages. Wheat and
corn were the targeted products at the beginning.
Having never been done before with paddy rice, Consergra
lead this first ever practical test with paddy -and later with oth-
ers- which took place at two rice co-operatives along the Ebro
river delta in Spain. After some very successful results coming out
of this research Consergra have led the way in chilling rice in bulk.
Through the 70’s, 80’s, 90’s and noughties chilling rice has become
a more and more common procedure.
Consergra have constantly kept innovating and it is this,
which keeps them ahead of the field in grain chilling technology.
Talking with the Managing Director for Consergra Joan Rius, our
International Marketing Manager Darren Parris learns what Joan,
feels separates Consergra from the competition.
“For over 45 years we have researched and developed grain
cooling technology, specializing in the chilled bulk preservation
of all kinds of grains, seeds, oilseeds, and many other perishable
products” Joan went on to say, “Our product Conserfrio® is a
registered brand of the Consergra company, which stands for
CONSERving GRAins”. Our experience includes the conservation
of wheat, barley, corn, oats, paddy rice, milled rice, …, soybeans,
sunflower seed, rapseed, cotton seed, …, green coffee beans, ead-
ible beans, different kind of pellets, nuts and many other perishable
products.
Continuing on from the early works with paddy rice, more
recent tests with cargo and milled rice, in all varieties of long,
semi-long and short grain have all showed the very same successful
results as their counterparts back in the beginning. It is because
of this research you will see that many different types of rice
and grains are preserved using the Conserfrio® product. Many
hundreds of these units are now being used in countries all over
the world.
Consergra was estabilished near to Barcelona, Spain many years
ago and since then, one of its key activities has been in the design
and manufacturing of cooling machines which are mainly used for
the grain conservation.
Joan Rius, further explained “besides the rationally scaled
standard grain cooler production program, which covers capacities
starting from 30 up to 500 tons per day, per machine, we build
customized solutions for special projects where solutions are tailor
made for process control applications in seeds, food, feed and
other industries where a strict control of air and temperature,
moisture and flow is needed. “
On asking Joan what sets Consergra apart from the competi-
tion, what USP’s do you have; Joan replied “ All our Conserfrio®
CONSERVING
GRAINS
Case study 1: Capital Cereals Company
Capital Cereals Company (CCC), located near to Bangkok, is a Thai
leading company in the process and reprocess of white (also called
milled) rice. The current total storage capacity at just this plant alone
(CCC currently owns other plants in different locations s as well) is
450.000 tons approximately.
As a leading Thai company
they have high expectations to
match their very own impres-
sive and highly technologically
advanced plant. Being such a large
state of the art plant the white rice
is stored in concrete silos as well
as in huge warehouses. The white
rice is stored for up to one year at
a time. So it is clear with such high
capacities and production, they
needed a quality solution to keep their rice cool.
In the concrete silos there is a ducting system at their bottom. The
chillers are placed under the silos.
At the warehouses, a combination of both on-floor ducting system
and under-floor ducting system is used. On-floor for the older ware-
houses, under-floor at the new-
est warehouses, which were just
built one year ago with the latest
storage expansion program.
The clean, temperature and
humidity controlled air blown by
the Conserfrio® chillers is drawn
into the grain mass cooling the
entire product when crossing the
pile. Using this method, the prod-
uct keeps its original white color
without getting yellowish or damaged by insects. The freshness and the
best flavor of the CCC product are kept at their very best right up until
the dispatching date, which can be a year after storage commences.
CCC purchased the first CONSERFRIO® units many years ago, and
installed more units recently as
the storing capacity increased
with the new built warehouses.
On operations of this scale,
the cost of purchasing and the
efficiency of running the cool-
ers can be recouped in product
saving within 12 months to 18
months.
Joan added; “Currently 18
Conserfrio® units of different
types help our customer in his task of having the best product by
preserving the quality of the milled rice, avoiding product color dete-
rioration (grain yellowing), aroma loss, insect infestation and all related
issues to grain storage”
through drying
36 | March - April 2014 GRAIN&FEED MILLING TECHNOLOGYF

4. machines are designed and built in-house, we have 100%
control of the whole quality and build process. In addition
to this we are very proud at Consergra to have the ISO
9001-2008 (TÜV certified) where we are certified for
the design and manufacturing of industrial and agricultural
machinery”. and the experience we gained throughout all
these years and accurate after sales service are key.
Looking through the global list of Consergra custom-
ers, it is clear to see that Conserfrio® units are installed
all over the world. They are being used more and more
in mild weather countries, but especially in those areas
where the ambient heat and moisture damage the grains
quicker.
Joan Rius added, “With cooling, optimal grain con-
servation is achieved which often minimizes and even
completely avoids the use of chemicals.
Besides being a cost-effective operation, the grain
weight and quality is preserved at its best avoiding weight
losses, insect infestation, mold presence and therefore
the so dangerous toxins. The optimum product moisture
content is kept as well. “
More than 15 years ago, the Conserfrio® chiller was
introduced into Thailand and since then more than a
hundred units have been set up and are in operation
in this country alone. Some Thai customers owing their
continued growth and success over the last decade
to the excellent experience that have had with the
Consergra chillers.
In Thailand the coolers conserve mainly rice (paddy
and milled) and corn, including their seeds as well.
Below you will find two brief reports on where
coolers were successfully introduced in two leading Thai
companies for different applications of both paddy and
white (milled) rice cooling in bulk in silos as well as in
warehouses.
Case study 2: Tonghua Rice
Tonghua Rice is another Thai leading company in the Jasmine rice process
and trade, their rice is exported all over the world where highest quality is
demanded.
Tonghua Rice is located in the Bua
Yai District, Nakornrachasima, North
Eastern area of Thailand where the
jasmine rice is grown.
At this huge and highly techno-
logical facility of Tonghua Rice their
activities include drying, storing, milling,
packaging of most delicate jasmine rice.
Their current installed storage
capacity is approx. 150.000 tons, which
is divided into several large ware-
houses. The rice is safely stored for
many months.
At the Tonghua Rice company, 24
Conserfrio® units keep the excellent
quality of their jasmine rice. Not only
are the paddy rice cooled, some chill-
ers are also used to keep the white
rice packed in a cold room before the
rice is dispatched. The unique design of
the cooling units permits high flexibility
in their use without any modification.
This process of chilling allows the
Tonghua rice company to maintain its
high quality and demand good prices
for its products.
March - April 2014 | 37GRAIN&FEED MILLING TECHNOLOGY
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A subscription magazine for the global flour & feed milling industries - first published in 1891
INCORPORATING PORTS, DISTRIBUTION AND FORMULATION
In this issue:
• Researching
and reporting:
the roller flour
milling revolution
• What is
Fumigation?
A technique of
pest control using
a toxic gas
• VIV Europe
preview
Our pull out
centre section
March-April2014
• Bread is the
foundation of
civilization
• Conserving
grains:
through drying
• Flour miller
values
weighbridge
technology on
the island of
Zanzibar
first published in 1891
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