1. Waste management at Stora Enso Veitsiluoto mill. Hannu Nurmesniemi. 8
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2. Veitsiluoto Mill Sheeting plant PM 5 PM 1 PM 2 PM 3 Saw mill Pulp mill
Groundwood pulp mill
Power plant
Hannu Nurmesniemi
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3. Production capacities
Stora Enso Printing and Reading Veitsiluoto Mill
Bleached stw and hdw pulp
Uncoated fine paper
Coated magazine paper
Sawn goods
t/a
t/a t/a
m3/a
Power Plant
Wood, bark and peat boiler
Oil boiler (as reserve)
246 MW
193 MW
Hannu Nurmesniemi
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4. The main environmental protection investments 1989-2012
Heat exchanger for cooling wastewaters
Flotation plant
Enlargement of the biological treatment plant
Collecting and burning all low concentration odorous gases
Incineration of concentrated odorous gases in the recovery boiler
Spill basin for the biological treatment plant
Information system for environmental data
Standby burner for burning maladorous gases
Biological wastewater treatment plant
Oxygen bleaching
System for sorting and collecting waste
Power plant
1990
1995
2000
2005
2010
Environmental protection investments EUR 62.0 million
Hannu Nurmesniemi
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5. Solid waste sorting and handling at Veitsiluoto Mill
The handling of solid waste at Stora Enso Veitsiluoto Mill is based on the sorting and collection of waste in containers situated in different departments. This system was taken into use in 1998.
The collection and sorting of wastes are divided into five categories, which are: the yellow containers for "Burnable waste for energy"; the green containers for "Recycled paper and board"; the blue containers for "Scrap metals"; the brown containers for “Biowaste” and for "Landfill waste", and the red containers for "Hazardous waste".
In addition, the plastic wrappers of paper reels are collected separately and baled at source.
Hannu Nurmesniemi
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6. Hannu Nurmesniemi
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7. Waste sorting containers at the sheeting plant
Hannu Nurmesniemi
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8. Utilisation of solid wastes at Veitsiluoto mill
Most of the waste generated at the mills has been directed to reuse.
Wood and bark waste as well as sludge from the pulp mill’s waste water treatment plant are burned and converted to energy at the power plant.
Waste paper and board, plastic wrappers, scrap metal and used oils are collected for recycling.
Sludge from the paper mill’s effluent treatment plant and a main part of the ash are used for landscaping the ash basin.
Ash is also utilized as a hardener in filling the cavities in Kemi chrome mine.
Most of the green liquor dregs are used for neutralising waste water.
Hannu Nurmesniemi
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9. Bark and wood waste is transferred by the conveyor from the wood handling plant to the power plant
Hannu Nurmesniemi
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10. Solid wastes in 2012 Utilized waste Wood and bark
Sludge (activated sludge plant)
Sludge (chemical treatment plant)
Dregs
Waste paper, board and plastic Ash
Industrial waste to be burnt
t/a (dry)
7 192
20 797
3 656
1 244
11 795
4 118
To the landfill site
Green liquor dregs
Lime mud
Other wastes
2 152
113
715
To Ekokem Oy
Hazardous wastes 22
Hannu Nurmesniemi
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11. Treatment of process wastes in 2012
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12. Waste to landfill, t/a
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13. Conclusion
Veitsiluoto Mill has succeeded well in the work of reducing and utilizing wastes.
There are still possibilities to minimize generation of solid waste (e.g. rejects and coating colour waste) by optimizing and developing paper production processes as well as to raise the degree of waste utilization.
Fibreclay is a desired by-product for the hydraulic barrier layer at the closed landfills and for landscaping purposes. However, it is important to minimize the amount of this main waste fraction and to use it as an valuable raw material.
Hannu Nurmesniemi
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14. Conclusion continues…
Fly ash has the best demand as a hardener in filling the mine cavities but for a certain part of fly ash other usage has to be found e.g. in the road and earth construction as well as a fertilizer.
Three quarters of the green liquor dregs have been utilized as a neutralization agent of acidic wastewaters. In future, it is very important to maximize the usage of dregs for this purpose.
Hannu Nurmesniemi
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15. Hannu Nurmesniemi
04/02/2013