Round wood consumption  3 700 000 s-m3/a. 2 debarking lines, Harwood and Softwood. Drum debarking, controlled by upper level system. HW thickness screening and SW gyratory screening.

Solution Mapping found:

-Wood loss reduction potential in debarking, 1%-1,5%

-Wood loss reduction potential in Screening, 3,0%-3,5%

-Electrical energy saving potential approximately 8%

-30,000 EUR/a fresh water saving potential

Round wood consumption  2 100 000 s-m3/a. 2 debarking lines, Softwood (Pine/Spruce). Drum debarking, controlled by upper level system. Thickness screening for chips screening..

Solution Mapping found:

-Wood loss reduction potential in debarking, 1,1%-1,4%

-Wood loss reduction potential in Screening, 0,5%-1,25%

-Debarking electrical energy saving potential 31%

-Fresh water usage not studied

Chip quality analysis was carried out at the mill with the high speed filming.

The effect of the changed chipper settings was studied with chip sampling and high-speed video.

-Hardwood Chipper: Reduction of oversize and overthick fractions by 26%. Reduction of the fine material by 31%.

-Softwood Chipper: Reduction of oversize and overthick fractions by 29%. Reduction of the fine material (pin+fines) by 43%.