| 摘要 |
Method for treating effluents and process waters in a pulp mill or a paper mill comprises: - introducing carbonated white liquor to an effluent or process water (3) containing dissolved calcium, - allowing calcium to be precipitated in form of calcium carbonate, and - separating the precipitated calcium carbonate (7) from the effluent or process water. Carbonated white liquor is obtained in contact of white liquor (2) with gas containing carbon dioxide (1), such as exhaust gas from a lime kiln. |
