Sugar Processing and Production
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Questions and Answers

What is the process of extracting sugar from beet called?

Diffusion

What is the name given to the sugar beet processing stage where impurities are removed from the raw juice?

Juice Purification

In what process is the thin juice concentrated to make a thick juice?

Multiple-effect evaporation

What is the primary fuel source for boiler furnaces in sugar cane mills?

<p>Bagasse (B)</p> Signup and view all the answers

What is the name given to the thick sugar syrup containing sugar crystals produced in vacuum pans?

<p>Massecuite</p> Signup and view all the answers

The final syrup from which it is not economical to extract more sugar is called molasses.

<p>True (A)</p> Signup and view all the answers

What are the machines called that are used to separate sugar crystals from syrup in the sugar production process?

<p>Centrifugals</p> Signup and view all the answers

What is the name given to the process of turning sugar syrup into a crystalline form by boiling off water under reduced pressure?

<p>Crystallization</p> Signup and view all the answers

What is the byproduct of sugar production that is used as fertilizer or growth substrate for yeast cultures?

<p>Vinasse (A)</p> Signup and view all the answers

The counter-flow principle in diffusion ensures that hot water flows in the same direction as the cossettes.

<p>False (B)</p> Signup and view all the answers

What is the approximate sugar content of the thin juice before entering the evaporators?

<p>14%</p> Signup and view all the answers

What is the approximate sugar content of the thick juice after leaving the evaporators?

<p>60%</p> Signup and view all the answers

What is the typical size of sugar crystals in massecuite?

<p>Approximately 1.0mm</p> Signup and view all the answers

What is the by-product of sugar crystal separation in the centrifugals?

<p>Molasses</p> Signup and view all the answers

What is the name given to the process of crushing sugar cane to extract juice?

<p>Crushing</p> Signup and view all the answers

What is the name given to the fibrous material separated from the juice during sugar cane processing?

<p>Bagasse</p> Signup and view all the answers

What is added to the limed juice to neutralize acids and precipitate impurities during sugar cane processing?

<p>Lime</p> Signup and view all the answers

What is the name given to the process of concentrating sugar syrup by boiling it under vacuum?

<p>Evaporation</p> Signup and view all the answers

What is the name given to the large vessels where sugar syrup is concentrated by boiling under vacuum in the sugar cane processing chain?

<p>Vacuum pans</p> Signup and view all the answers

What is the name given to the process of separating sugar crystals from syrup using centrifugals?

<p>Crystallization</p> Signup and view all the answers

What is the approximate sugar content of the syrup before it is concentrated in the vacuum pan during sugar cane processing?

<p>65-70%</p> Signup and view all the answers

What is added to the syrup in the vacuum pan to initiate crystallization?

<p>Small sugar crystals</p> Signup and view all the answers

Flashcards

Sugar Beet Harvesting

The process of harvesting sugar beet from the field, starting around the end of September and continuing till mid-January.

Mechanical Harvesting

A mechanical process that not only pulls the sugar beet from the ground but also cleans it and removes the tops.

Beet Tops

The leaves of the sugar beet plant, a valuable source of animal feed.

Weighing and Sampling

The process of determining the weight and sugar content of the delivered beet.

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Tare

The weight of impurities like clay, stones, or beet tops that are deducted from the total beet weight.

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Farmer Payment

The payment received by farmers based on the weight and sugar content of the delivered beet.

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Reception Area

The area where the beet is unloaded and temporarily stored, usually a concrete pad.

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Soil Tare

The measurement of the amount of non-beet material in the delivered load.

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Crown Tare

The measurement of the amount of low-sugar beet in the delivered load.

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Sugar Content

The percentage of sucrose present in the sugar beet crop, also known as 'pol'.

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Nitrogen Content

The amount of nitrogen in the sugar beet, used to recommend the right amount of fertilizer to the farmer.

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Unloading Methods

The two methods of unloading sugar beet: dry unloading where the beet is conveyed to silos and wet unloading where the beet is washed from the lorry.

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Silos

Open-air storage silos where dry-unloaded beet is stored.

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Wet Unloading

A process where water is used to wash the beet from the lorry and transport it to the factory.

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Stone and Grass Catchers

Machines that remove stones and grass from the incoming beet stream.

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Diffusion

The process of extracting sugar from the beet by slicing it into thin strips and then diffusing the sugar out with hot water.

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Cossettes

Thin slices of sugar beet used in the diffusion process.

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Diffuser

A large vessel where the sugar is extracted from the cossettes using hot water.

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Raw Juice

The sugar solution obtained from the diffuser, containing around 14% sugar.

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Pulp

The exhausted beet slices left after the sugar is extracted, used as animal feed.

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Juice Purification

The process of removing impurities from the raw juice using lime and carbon dioxide.

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Milk of Lime

A suspension of calcium hydroxide in water used in juice purification.

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Carbonatation

The process of adding carbon dioxide to the sugar solution to precipitate impurities.

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Chalk

A type of chalk, calcium carbonate, formed during carbonatation.

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Thin Juice

The clarified sugar solution obtained after carbonatation, containing a lower amount of impurities.

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Evaporation

The process of concentrating the thin juice by boiling off water.

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Evaporators

Large vessels used to evaporate water from the sugar solution.

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Thick Juice

The concentrated sugar solution obtained after evaporation, containing approximately 60% sugar.

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Crystallization

The process of turning the thick juice into sugar crystals.

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Vacuum Pans

Large vessels used to crystallize the sugar.

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Massecuite

The mixture of sugar crystals and syrup formed during crystallization.

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Centrifugals

Machines used to separate the sugar crystals from the syrup.

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Molasses

The syrup remaining after the sugar crystals are separated.

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Study Notes

  • Sugar production involves processes for both sugarcane and sugar beets.
  • The 2009 Top Ten Sugar Beet Producers, in metric tons, were: France (35.2 million), United States (27 million), Germany (25.9 million).

Sugar Beet Processing

  • The process begins with harvesting sugar beets.
  • The beets are washed and sliced.
  • Impurities are cleaned from the juice.
  • Sugar is crystallized from the syrup.
  • Sugar crystals are dried.

Sugar Beet Production

  • Harvesting occurs from late September to mid-January.
  • Mechanized methods are used (cutting off tops, extracting roots).
  • The leaves are used as animal feed.
  • Beets are transported via lorries to processing factories.

Weighing and Sampling

  • Beet weight is measured accurately at the factory.
  • Samples are taken to determine sugar percentage and tare.
  • Tare includes stones and beet byproducts which are deducted from the total weight.

Reception

  • Each load is weighed and sampled before being placed in heaps.
  • Soil tare, crown tare, and sugar and nitrogen content are checked.
  • The sugar content of each load is calculated based on these elements.
  • Beets are moved into a channel, then washed, headed for the processing plant.

Unloading

  • Two systems are used for unloading: dry and wet.
  • Dry unloading uses conveyor belts to silos.
  • Wet unloading uses water jets, cleaning the beets.
  • Stones and grass are removed using a series of stone and grass catchers.
  • Beets are washed before proceeding.

Diffusion

  • Sugar is extracted from sliced beets by diffusing with hot water.
  • Beet slices are continuously fed in and out.
  • The extracted juice is separated from the pulp.
  • The pulp is dried and used as animal feed.
  • Raw juice is around 14% sugar and black.

Extraction

  • Sugar is extracted from cossettes through the use of hot water.
  • The juice contains about 98% sugar.
  • The process is called counter-flow extraction, with the water's flow opposite to the cossettes.

Water Thermostat

  • The water temperature is maintained during extraction.

Evaporation

  • The purified juice is concentrated from 14% to 60% sugar by boiling off water in evaporators.
  • Evaporators are large vessels.

Evaporation (Continued)

  • Concentrated juice is created through multiple effect evaporation, producing a thick syrup similar to pancake syrup.
  • This thick syrup is stored in tanks, to reduce the load on the crystallization plant.

Crystallization

  • Recycled sugar is dissolved into thick juice.
  • Sugar crystals form, with syrup (mother liquor) around them.
  • This is called massecuite.
  • The liquid is separated from the crystals by centrifuging.
  • Crystals are dried in a granulator.
  • A second batch of sugar may be produced, of lower quality.

Centrifugals

  • The sugar is separated from the syrup using centrifugals.
  • The wet sugar is dried, screened, cooled, and sent to large storage silos (up to 50,000 tonnes).
  • Molasses is the final syrup.
  • The process takes around 12 hours, with beet producing 12-14 tonnes of sugar and 3-4 tonnes of molasses per 100 tonnes.

Additional information

  • White sugar centrifugals are for recovering sugar crystals.
  • The pages include diagrams, images, and maps, but these aren't explicitly requested in the general notes and therefore omitted.

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Description

Explore the intricate processes involved in sugar beet production, from harvesting to crystallization. This quiz covers the techniques, technology, and key statistics related to sugar industry trends. Test your knowledge on the efficient methods used in sugar beet processing and production.

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