LIME AND SUGAR
MEASUREMENT & MONITORING
VEGA
EFFECTIVE LEVEL CONTROL IN MILK OF LIME MIXING
VESSEL
As the sole processor of the UK’s beet sugar
crop, British Sugar work in partnership with
3,500 growers and customers to deliver
a world-class product that is made to the
highest standards every day.
Processing around eight million tonnes of
sugar beet and producing up to 1.4 million
tonnes of sugar each year, they are the
leading producer for the British and Irish
food and beverage markets.
Their innovative approach to manufacturing
also enables British Sugar to create a range
of co-products from power generation and
bioethanol, to animal feed and much more,
allowing British Sugar to become one of the
most efficient sugar processors in the world.
Sugar beet processing is a complex and
demanding process.
To consistently produce highest quality
product and maintain the lead in efficiency,
requires continuous innovation and process
enhancements.
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PECM Issue 34
Milk of lime measurement
One area, recently improved, at its Newark
production site is the production and
mixing of milk of lime. This is an essential
formulation for use in sugar production
when purifying the juice from beet or cane.
Typically, 125kg of limestone is consumed in
the production of one ton of sugar, so it is a
significant process input. Sugar beet is sliced
up and passed through a diffuser to extract
the sugar juice. Lime, produced from calcium
limestone, is used in the next stage of the
production process.
It is converted into milk of lime and this is
used to capture and remove impurities in the
juice of sugar beet. A high quality lime-water
mixture is required in the sugar process to
ensure an efficient, high quality sugar juice
purification stage.
Being such a versatile product, lime is
not just used to purify raw materials, it is
also often used to clean and neutralise
wastewater produced by sugarbeet.
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