From wood to valuable products
Borregaard aims to use as much as possible of their raw materials in the production process. The company utilises the different component parts of timber in a range of different products.
Effective use of all parts of timber
The production of chemical products based on timber is carried out in many steps:
- The bark is removed, and the log is cut into chips. The bark is a valuable source of energy, and Borregaard gets a considerable amount of heat energy from the bark incineration plant.
- The chippings are treated so that the cellulose fibres are released. The cellulose goes through a range of bleaching and purifying stages before drying and packing.
- The remaining parts of the timber, which include binding agents and sugar compounds, are separated in the pulping process. This flow of raw material (waste liquor) is sent to the ethanol factory where the sugar is converted into ethanol through fermentation.
- The sugar free waste liquor contains lignin which forms the basis for the production of a range of valuable products from the lignin and vanillin factories.
- The residual organic material from the timber which is not included in any products goes to a biological treatment plant where it is broken down with the help of bacteria. In this process biogas (methane) is produced, which is used as an energy source. The biological mud from the breakdown process is burned in the bark incineration plant.
Access to sustainable raw materials
Borregaard's manufacturing activities are largely based on a natural, renewable raw material, namely wood. All processes focus on an optimum use of resources, which helps limit the need for raw materials.
Borregaard wishes to secure its supply of wood from forests that are managed according to internationally approved principles for sustainable operations. Borregaard's timber comes from Scandinavia where there are recognised criteria for forest management.