Carbon savings

Present and Future EffiSludge

The benefits of EffiSludge is to allow up to 9000 tonnes CO2 emissions reduction per year. This is linked to energy savings, the replacement of fossil- based nutrient with recycled nutrient and biogas production, both from the wastewater and wastewater residues, expected to replace fossil fuels.

In the graphic bellow, the CO2-emssions from the wastewater treatment "Before EffiSludge" is linked to data from 2017. "Present EffiSludge" is based on observation between 2019-2021 with only partiall processing of wastewater and wastewater residues. "Future EffiSludge" estimates the overall benefit of EffiSludge when having the all wastewater stream taken into the anaerobic wastewater treatment and all wastewater residues is digested to biogas.

Detailed information will be available after the 2nd December 2021 - Closing workshop date.

Before EffiSludge

The production of pulp and paper requires large amounts of water. This water needs to be cleaned before returning to recipients such as rivers and lakes. The treatment of the 20 000 m3 wastewater generated at Skogn each day requires addition of 1000 kg Nitrogen, 100 kg Phosphorus and 40 MWh electricity to support operation within the overall wastewater treatment. All together, these inputs correspond to an annual carbon emission between 600 and 3500 tonnes CO2eq dependingn on the carbon factors applied.