PROJECT
INCORPORATING COLD CHAIN
Cooling towers arriving on site.
installation, as manufacturer recommended
specifications and water treatments are not
always sufficient or effective enough for all
types of fresh water.
Since then, they have enlisted the
help of a qualified chemist to scientifically
analyse and treat their water to negate this
issue. The water is monitored monthly and
although this is an expensive process, it has
solved their water issues. Considering the
replacement costs of an evaporator (almost
R300 000) and the cost of the downtime (as
evaporators are not kept in stock), this is an
expense well worth it.
Medallion also has a reverse osmosis plant
for potable water.
PACKAGING
Medallion does its own packaging in-house
for which it requires refrigeration. This is fed
from a standard packaged system. But this is
a whole new story on its own! CLA
Sources: www.highveldmushrooms.co.za
List of professionals
Owner Highveld / Medallion Mushrooms
Developer Highveld / Medallion Mushrooms
Project manager Barend Koorts
Consulting
engineers
Every room is equipped with temperature and humidity control.
recycled — because the compost is not as
fussy. All the rainwater that falls on the roof
and the cleaning platforms goes through a
swale, so it gets cleaned by natural plants
and reeds and then the water is sucked out
at the back end of the swale and is used for
fresh water for the compost yard — which
it needs at certain times of the process.
The water runs through the reed bed, then
through the subsoil drains, and comes out as
clean (often even cleaner) than the water
they get from Theewaterskloof Dam.
Not all water is equal, though, and the
team had to learn a hard lesson in terms
of water treatment. This is not something
they have had to deal with for their farms
in Gauteng, as the water there tends
to be high in calcium and magnesium,
so the only problem you have there is
deposits. However, with the water they
get from their borehole in Cape Town and
Theewaterskloof, the opposite happens: the
water corrodes instead of deposits.
Medallion has had a lot of issues with
some of the total dissolved solids (TDS) levels
of their water and subsequently has spent a
lot of money to get experts in to address the
issue effectively. This is an important step in
Contractors
Product
suppliers
Electrical SK Technologies/ Christiaens Equipment
Mechanical Christiaens Equipment
Wet services Melt Wahl
Civil Popler Trading
Main building Christiaens Equipment Holland and ACA Staal
HVAC & R Wynroete Verkoeling
Electrical SK Technologies
Chillers Aermec (AERSA)
Cooling towers Baltimore Air Coil (BAC)
Controls Schneider Electric / Belimo
Pumps Radid Allweiller
PVC and stainless
water filters Hennie Kloppers Staalwerke
Thermostats Carel Controls
Compressors Bitzer
COLD LINK AFRICA • May 2018
www.coldlinkafrica.co.za
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