Table 2. Comparative Evaluation of Testing Dataset RMSE and R² of COD, TSS, and E. coli in Each Sampling Point.

sampling point	model structure	COD (mg/L)		TSS (mg/L)		E. coli (MPN/100 mL)
		RMSE	R2	RMSE	R2	RMSE	R2
influent	PLS	536	0.52	214	0.30	9.05 × 106	0.32
	SVR	522	0.29	152	0.69	1.04 × 107	0.01
	CUB	322	0.82	48	0.97	8.86 × 106	0.02
	QRNN	452	0.45	208	0.51	6.30 × 106	0.16
AnMBR	PLS	503	0.85	518	0.39	1.23 × 107	0.01
	SVR	177	0.98	154	0.91	9.81 × 106	0.01
	CUB	595	0.80	100	0.96	8.60 × 106	0.12
	QRNN	294	0.94	602	0.34	1.19 × 107	0.02
permeate	PLS	245	0.26	122	0.25	3.80 × 106	0.03
	SVR	93	0.75	2.2	0.57	2.93 × 105	0.29
	CUB	107	0.11	3.2	0.69	6.44 × 103	0.28
	QRNN	241	0.16	12	0.32	5.53 × 103	0.13
post-NCS	PLS	150	0.68	37	0.20	1.21 × 106	<0.01
	SVR	31	0.85	1.5	0.68	6.46 × 103	<0.01
	CUB	63	0.65	3.3	0.46	1.16 × 103	<0.01
	QRNN	56	0.67	18	0.22	4.57 × 103	<0.01
effluent	PLS	127	0.37	69	0.09	1.81 × 106	<0.01
	SVR	37	0.94	4.4	0.75	1.85 × 103	<0.01
	CUB	55	0.88	4.24	0.81	1.19 × 103	<0.01
	QRNN	56	0.88	14	0.20	5.63 × 103	<0.01