Figure 1.

Density-based homogeneous separation of AS biomass. (A) A visualization of separation of AS from the EBPR facility TMWRF, using three density suspensions a, b and c as detailed in Table 1. AS was separated into two fractions, either lighter (e.g., 1030T) or denser (e.g., 1030B) than the net density of the suspension (e.g., 1.030 g/cm³ for the density suspension a). (B) Mass distribution of AS from an aeration tank in the EBPR facility TMWRF and from an oxidation ditch with nitrogen removal function in STMWRF performing conventional treatment.