Enlèvement du phosphore d'un effluent primaire par scories d'aciéries

The technology of reactive filters using slag for phosphorus treatment has been used to treat the municipal wastewater of St-Roch-de-L'Achigan. The pilot plant was formed by three independent treatment trains fed by raw water, previously decanted into a septic tank. The first train consisted of three columns filled with slag. The second train was formed by five barrels filled with slag. Two barrels of washed slag formed the last treatment train. The column system has a longevity of 27 days. During this period, the concentration of o-PO4 at the outlet was less than 0.36 mg-P / L. The best performing column was the column 2, loaded with 5 - 10 mm slag. The removal rate was 70 mg-P / kg slag during its life time.