As the concern for “paper pollution” increases, pulp and paper companies are seeking for superior ways of controlling their emissions. Chemical recovery furnaces, combustion units, as well as lime kilns are some sources of SO₂ and CO₂ discharge from paper mills.

Gases from recovery boilers are typically treated for SO₂ removal with alkali scrubbing processes. As environmental regulations restrict water effluents, regenerable processes offer an interesting alternative. The CANSOLV SO₂ Scrubbing system is a regenerable process that produces minimal liquid effluent. The byproduct is a pure water saturated SO₂ gas. In sulfite mills, the SO₂ gas can be recycled for use in the preparation of the pulping liquor.

Systems for adding makeup chemicals, using calcium carbonate [CaCO₃], sodium carbonate [Na₂CO₃], also contribute to CO₂ emissions from paper mills. The CANSOLV CO₂ Capture system is custom engineered to achieve bulk removal of CO₂ with minimal effluents from the process.