Our by-products

A sugar beet is so much more than a little sugar factory

The Hard Cube® made at Raffinerie Tirlemontoise is world-famous and unique. This sugar cube has been produced from Belgian sugar beets for many years. Sugar beets contain ± 17 to 18% sugar. But what happens to the rest of the sugar beet?



There is an entire recycling story behind the Hard Cube. At Raffinerie Tirlemontoise, the whole sugar beet is used and processed. This means that, in addition to sugar, many other products or by-products are produced. Raffinerie Tirlemontoise has been doing this for a long time, and the process has been gradually improved.


radicelles - bietenstaartjesWhile the sugar beet is being washed, the last leaves are removed from the head of the beet. We call these beet tails, and they are sold as cattle feed.



pulpes - pulpDuring the manufacturing process, the beets are rasped into small thin pieces - beet slices. The sugar is extracted from these slices. The remainder is pulp. This is then compressed into pressed pulp. This pressed pulp is very nutritious for livestock.



In the next step of our manufacturing process, the sugar juice is purified with lime and CO2. After filtration, we are left with sugar juice on the one hand, and mineral-enriched calcium on the other. This mixture is compacted, which results in foam soil (spent lime) - better known as Neutrafertil. Spent lime is an excellent, calcareous fertilizer that is much appreciated by farmers.


melasseThe sugar juice is evaporated to remove a large portion of water. The result is thick, concentrated juice.  The thick, concentrated juice is cooked some more, and a hot cooking liquid is obtained. This is put into centrifuges where the run-off and sugar crystals are separated. The remaining run-off, the final molasses, is used in the production of alcohol, yeast, citric acid or cattle feed.


Our by-products fully meet all the required norms and standards. In order to do this, Raffinerie Tirlemontoise works closely with the Koninklijk Instituut voor de Verbetering van de Biet (KBIVB) (Royal Institute for the Improvement of Beet in Belgium).


Water and earth

A sugar beet contains a lot of water. This water remains in circulation; for example, it is used to wash the beets, as well as for other processes.


When sugar beets are harvested, the earth sticks to them. Therefore, beets are given a preliminary clean on the field while they are being loaded. This means that a lot of the earth remains on the field, reducing the transport requirements, which, in turn, is good for the environment. The earth that is transported to the sugar factory is re-used in the fields after the completion of processes.


At Raffinerie Tirlemontoise, nothing is wasted and value is obtained from the entire sugar beet.