Question

how is sugar made from sugarcane in factories

Answer 1

The bagasse produced after extracting the juice from sugar cane is used as fuel to generate steam in factories. ... The end product derived from sugar refining is blackstrap molasses. It is used in cattle feed as well as in the production of industrial alcohol, yeast, organic chemicals, and rum

Answer 2

it isn’t manufactured. It’s grown. Sugar is made by plants – in fruit, vegetables and stalks – out of carbon dioxide and water, using the energy from the sun.The first part of the sugar milling process is rated PG13 for violence because to get the sugar out of the sugarcane, we use rotating knives and shredders to smash the cane stalks to little pieces of fibre. Then to get the sugar out of those little pieces, most sugar mills in South Africa use a process called diffusion. This involves dragging the shredded sugarcane through an enormous “bath” in which it is soaked in hot water. The hot water washes the sugar out of the fibre, in much the same way that hot water gets tea out of tea-leaves.

Once we’ve washed out as much of the sugar as we can, we squeeze the remaining water out of the fibre by pressing it between heavy rollers (called a mill, which is where sugar factories get their name).

The dry fibre that comes out of the mill is a very useful product. Some factories use it as an ingredient in animal feeds, some use it as a feedstock for paper-making, but all sugar mills use it as a fuel. A lot of heating goes on in a sugar factory, and for that we need a source of energy. The sugarcane fibre is an excellent fuel, so sugar mills burn it in boilers to produce steam.

Before the steam gets used in the factory, it first drives turbines to produce electricity – our sugar factories are self-sufficient in both steam and electricity – all using a fully renewable fuel, sugarcane. Some sugar factories even export some of their “green” electricity into the national grid.
Having soaked the sugar out of the fibre, we now have a lot of hot water with sugar dissolved in it.
use steam to heat the sugar solution, evaporate the water and concentrate up the sugar so that it forms crystals. We then spin this mixture at high speed in a perforated drum, and the centrifugal force pushes the liquid out of the perforations, while the sugar crystals are trapped inside. All that remains then is to dry the crystals with warm air, and we’ve made sugar.