Domsjö Pulp Mill

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Nombre / Name
Domsjö Pulp Mill
Empresa / Company
Aditya Birla Group (www.domsjo.adityabirla.com)
Localización / Location
Domsjö (Sweden)
Categoría / Category
Comercial / Commercial
Estado / Status
Operación / Running
Plataformas / Platforms
Azúcares C5/C6, lignina, biogás / C5/C6 sugars, lignin, biogas
Materia prima / Feedstock
Cultivos lignocelulósicos / Lignocellulosic crops
Producto / Product
Bioetanol, lignina, celulosa  / Bioethanol, lignin, cellulose

Figure 1. Domsjö Pulp Mill (extracted from Reference 1)

La planta papelera de Domsjö es una biorrefinería que genera productos y energía a partir de materias primas renovables procedentes de los bosques. Además de celulosa, la instalación produce lignina y bioetanol. El proceso también permite obtener ácido carbónico, biogás y energía como productos complementarios. La bioenergía se usa internamente y hace que Domsjö sea virtualmente independiente de fuentes de energía fósil. La materia prima está constituida mayoritariamente por abeto y pino.  Domsjö Pulp Mill is a biorefinery that generates products and energy from renewable raw materials from the forests. As well as cellulose, the facility produces lignin and bioethanol. Complementary products such as carbonic acid, biogas and energy, are also obtained. The bioenergy generated by the process is used internally and makes Domsjö virtually independent of fossil energy sources. The raw material mainly consists of spruce and pine.

La madera descortezada se convierte en astillas y se alimenta junto con los químicos de cocción en los digestores. La corteza se quema para obtener energía en forma de vapor. Después de la cocción, la celulosa es lavada y, posteriormente, blanqueada con peróxido de hidrógeno en una unidad de blanqueo de ciclo cerrado. Finalmente, es secada y distribuida en fardos. El proceso completo de transformación lleva unas 40 horas. Durante la cocción en los digestores, la hemicelulosa y la lignina son liberadas. La hemicelulosa es fermentada y destilada para obtener bioetanol. La lignina se refina, se seca y se empaqueta. Los químicos de cocción se recuperan para ser utilizados de nuevo en el proceso. The debarked wood is chipped and fed together with the cooking chemicals into the digesters. The bark is burned and recovers energy in the form of steam. After cooking the cellulose is washed, followed by bleaching with hydrogen peroxide in the closed-loop bleaching unit. The bleached cellulose is then dried and delivered in bales. The whole process from log to bale takes approximately 40 hours. During cooking in the digesters, hemicellulose and lignin is released. The hemicellulose is fermented and distilled into bioethanol. The lignin is refined during the cooking process. It is then being dried and packed. The cooking chemicals are recovered to be used again in the process.

Figure 2. Domsjö Pulp Mill process diagram (extracted from Reference 1)

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REFERENCIAS / REFERENCES
1 www.domsjo.adityabirla.com.

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