Advanced circulation and utilization practice of side products in a wood processing company Oy Kohiwood Ltd. Soini Finland.
The factory has a sawmill and factory for glulaminated wooden panels, where about half of the sawmill production is further processed in integrated production plant to wooden laminated glulam-panels. Received wood to the plant is about 1.300 m3 a day.
Side products: Approx. 200 m3 of bark a day used as biofuel partly in own power plant, partly sold to other power plants Approx. 1.000 m3 of loose wood chips a day sold to pulp and paper production. Approx. 150 m3 of sawdust a day partly used for wooden
pellet production, partly used directly as biofuel in Kohiwood’s own and customers’ power plants. The processing produces grinding dust and woodchips from
planning machines, which are used in wood and pellet production. All the timber material unqualified to final commercial productin the production process is crushed to wooden biofuel.
The sales price of the side products is economically a very significant part of the company’s financial income.
The wood chips are sold to Finnish pulp and paper production companies for raw material. The sawdust and bark are partly used in Kohiwood’s own production process drying of wood material and heating of the company’s facilities.
The rest of the biomass is sold as biofuel for district heating plants at the distance of max. 120 km.
The biomass is a side product of the Kohiwood’s production process, so it is part of the operational functions of the company. The annual value of circulated side products is abt. 2–2,5 MEuro. Handling
and transportation of the circulated side products employs abt. 20 people
Evidence of success
Production of the sawmill and glulam timber panels would not be profitable without the sales prices got from the side products, so the optimized and effective way to utilize the side product circulation is a key business factor for the Kohiwood company.
Potential for learning or transfer
The practice ensures, that all parts of the wood material supplied to the Kohiwood’s factory of glulaminated wood panels are utilizated in most valuable way. It saves primary wood material consumption in pulp and paper production and replaces fossile fuels in district heating plants. For the Kohiwod company the sale of side products is also an important income, which makes abt 15% of the whole company’s turnover.