Wastewater and seeding sludge
The influent wastewater was directly introduced to the SBR
reactor from the regulating tank in the WWTP. The composition
of the influent was given in Table 1. Both reactors were initially
inoculated with activated sludge taken from the aeration tank of
the WWTP. The seeding sludge had a mixed liquor suspended
solids (MLSS) concentration of 4.9 g/L, a mixed liquor volatile suspended
solids (MLVSS) concentration of 2.58 g/L and a sludge volume
index (SVI) of 46.9 mL/g.