Como o AÇÚCAR é feito - Processo Industrial

The Journey of Sugar Production

Overview of Sugar Production

• Sugar is one of the most consumed products globally, with Brazil being the largest producer, followed by India, China, Thailand, and the United States.

• The sugarcane plant is believed to be native to New Guinea and was spread to Southeast Asia and the Indian subcontinent where it began cultivation around 500 BC.

• Arabs played a crucial role in spreading sugarcane cultivation and production methods during the Islamic expansion in the Mediterranean.

Historical Context

• In medieval Europe, sugar was a luxury item used sparingly; however, its demand increased significantly during the 15th and 16th centuries as sugarcane was introduced to the New World.

• The rise in sugar demand led to an increase in slavery and plantation systems in colonies during the 19th century.

• The Industrial Revolution saw alternatives like beet sugar emerge due to cane sugar shortages caused by Napoleonic wars.

Modern Sugar Industry

• By the 20th century, sugar became a staple food worldwide; today, it is produced from both cane and beet.

• Beet sugar production is more common in temperate climates; beets are harvested when their sucrose content peaks.

Sugar Extraction Process from Beets

• After harvesting, beets are washed and sliced into thin pieces called cossets for extraction.

• These slices are placed in hot water to extract juice creating a syrup that undergoes purification through carbon dioxide treatment.

Final Steps of Beet Sugar Processing

• The syrup is evaporated until thickened into a concentrated form before crystallization occurs.

• Crystals are separated from syrup using centrifugation before drying for packaging.

Sugar Production from Cane

Cultivation of Sugarcane

• Sugarcane thrives primarily in tropical regions such as Brazil, India, and China. It resembles bamboo with heights reaching up to 6 meters.

Harvesting Techniques

• Harvesting occurs between 12 to 18 months post planting; canes may be cut manually or mechanically depending on farm size.

Processing at Sugar Mills

• Once harvested, cane must be processed quickly (within 24 hours), starting with washing and cutting into small pieces for juice extraction.

Juice Extraction Methodology

• Cane goes through multiple crushing mills where juice (or "liquid") containing sucrose is extracted while bagasse remains as waste material.

Sustainability Practices

Sugar Production Process

Clarification and Evaporation

• The sludge generated in clarification tanks is filtered to extract remaining sugar, ensuring no waste as the sludge is used to fertilize sugarcane fields.

• The clarified liquid undergoes evaporation to remove most of the water, resulting in a thick, sweet syrup.

Concentration and Crystal Formation

• This syrup is concentrated under vacuum until it becomes a thick, viscous mass known as "rich honey," increasing sugar concentration from 15% to 60%.

• The rich honey is then placed in a centrifuge where it is spun at high speeds, separating sugar crystals from the honey and producing raw sugar.

Refining Raw Sugar

• Raw sugar must undergo refining; it is dissolved again, clarified, and filtered to eliminate remaining impurities.

• The resulting syrup is concentrated and recrystallized to form white sugar crystals which are then centrifuged again to remove residual molasses before drying.

Packaging for Distribution

• Dried sugar exits the dryer into large bags (1,000 kg capacity), which are transported for further processing into smaller retail packages.

Types of Sugar Produced

• Different types of sugars include brown sugar (partially removing molasses), giving it distinct color and flavor.

• Demerara sugar undergoes less refining than white but more than brown, resulting in a golden color with a slight caramel flavor.