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|1. (WO2017033160) METHOD FOR TREATING WASTE WATER COMPRISING A QUICK STATIC DECANTER AND ASSOCIATED FACILITY|
|Title:||METHOD FOR TREATING WASTE WATER COMPRISING A QUICK STATIC DECANTER AND ASSOCIATED FACILITY|
The invention relates to a method for treating waste water comprising upstream at least one step of treatment by activated sludge in an aeration basin (1), and downstream at least one step of decanting in a fast static decanter (4), in which the flows at the inlet and outlet of the decanter are adjusted according to a setpoint value for the mass load at the inlet and outlet respectively, and according to the concentration of material in suspension measured at the inlet and outlet respectively. Said adjustment also takes account of a residence time of the material in suspension limited to between 30 minutes and 100 minutes, preferably to between 40 minutes and 60 minutes. The invention also relates to a facility comprising the fast static decanter.