The chemical pulp mill processes and uses the solution flow, including at least one biological treatment of the effluent to produce a pure, 200 mg/l or higher waste water with a Cod value exceeding 150 mg/l, and recycles between the first and the last. A All stages of money laundering.

摘要

Method for treating and utilizing Liquid flows in a plant of Chemical Pulp, comprising: a) a cooking process of a Chemical Pulp Alkaline Treatment of the material, (b) Brown(c) bleaching process of such material, (d) purification of the filtrates with at least a Biological TreatmentAnd an additional phase that consists in using a Purified Liquid effluent treatment in Stage c) between the first stage and the last stage of money laundering Oxidant.