Analysis and in situ characterization of activated sludge communities capable of benzotriazole biodegradation

Environmental Sciences Europe

Table 1 Sludge characteristics of the different activated sludge communities tested

WWTP	Sludge composition	Color	Settleability	SVI^a
MBR-MH	Well-suspended biomass with many planktonic organisms, homogenous suspension, supernatant turbid	Black to dark-brown	Slow	88
CAS-M	Few planktonic organisms, inhomogeneous suspension, supernatant clear	Gray to light gray	Fast	86
CAS-E	Numerous planktonic organisms, suspension somewhat homogenous, supernatant turbid	Anthracite	Slow to moderate	88