| 摘要 |
A method for the biological treatment of effluent, in particular wastewater, which involves pouring the effluent to be treated into a basin (2) in which mobile supports (3) are submerged for developing a biofilm and for carrying out a treatment by fixed fluidised bed, aerating the effluent in the basin with a distribution of an air flow, from the bottom of the basin, according to a floor configuration, the aeration having a function of supplying air for treating the nutrients, and a function of keeping the supports moving, regulating the aeration in order to modulate the air flow depending on at least one parameter taken from the following parameters: the residual oxygen concentration, and/or the concentration of oxygen and the concentration of N-NH4, and/or the permitted load; modifying the distribution of the air supply from the floor configuration to a spiral flow configuration when the operating conditions result in an air flow lower than a minimum air flow (Q mini Plancher) required to keep the mobile supports (3) moving in the floor configuration. |
