Table 3.

Summary of the average percentage removal of pollutants from the biological treatment processes at optimum operating conditions.

Parameters	Samples	CASP (6 h HRT)		MBBR (3 h HRT)		PBBR (2 h HRT)
		Values	Reduction (%)	Values	Reduction (%)	Values	Reduction (%)
TSS (mg/L)	Inlet	207.6 ± 11.15	76.78	233.4 ± 14.60	80.03	251.2 ± 10.25	82.08
	Outlet	48.2 ± 1.30		46.6 ± 1.14		45 ± 1.58
NH3-N (mg/L)	Inlet	36.92 ± 2.05	73.83	38.36 ± 1.76	77.50	40.48 ± 1.61	79.03
	Outlet	9.66 ± 0.28		8.63 ± 0.53		8.49 ± 0.44
PO4-P (mg/L)	Inlet	10.38 ± 0.83	35.64	10.55 ± 0.64	40.28	10.62 ± 0.67	43.31
	Outlet	6.68 ± 0.54		6.30 ± 0.35		6.02 ± 0.38
MPN/100 mL	Inlet	6.06 × 106 ± 2.7 × 106	94.25	5.56 × 106 ± 1.70 × 106	93.27	6.62 × 106 ± 1.95 × 106	95.44
	Outlet	3.48 × 105 ± 1.43 × 105		3.74 × 105 ± 1.17 × 105		3.02 × 105 ± 1.12 × 105
TVC (cfu/mL)	Inlet	2.23 × 107 ± 4.49 × 106	95.30	2.88 × 107 ± 3.36 × 106	96.04	3.34 × 107 ± 3.17 × 106	97.16
	Outlet	1.05 × 106 ± 2.71 × 105		1.14 × 106 ± 7.16 × 104		9.48 × 105 ± 6.98 × 104

The values represent the mean of five replicates ± standard error (SE).