Emissions at historically low levels
The biological treatment plant at Obbola paper mill cleans the mills’ waste water before it’s released to the river. The purification is made in several stages where, among other things, suspended material (particles such as fibre residues, oxygen-consuming substances and biological sludge) is purified. Last year, an improvement project was initiated with the aim of improving the purification in the biological treatment plant. The factory had experienced interruptions in the plant and risked not being able to meet the emission conditions for the next years, if no measures were taken. A cross-functional team worked intensively for 12 weeks to collect data to be able to investigate the root cause of the disruptions at the plant. A number of measures were taken.