Rheology Measurements for Online Monitoring of Solids in Activated Sludge Reactors of Municipal Wastewater Treatment Plant

Table 2

Comparison between experimental and calculated TSS% values, relative error, standard deviation (SD) estimates, and coefficient of determination (𝑅²) values for the model investigated.

Sludge	TSS (g/L)	TSS% experimen.	TSS% calculated	Relative error	SD	𝑅^2
S1	4.088	0.41	0.46	0.122	0.094	0.860
Dil. 1 : 1	4.013	0.40	0.30	0.250	0.075	0.900
Dil. 2 : 1	5.350	0.53	0.58	0.094	0.174	0.920
Dil. 3 : 1	6.019	0.60	0.63	0.117	0.139	0.930
Dil. 4 : 1	6.420	0.64	0.74	0.156	0.162	0.946
S1 thick.	8.025	0.80	0.78	0.025	0.095	0.986
S2	1.781	0.18	0.21	0.167	0.037	0.887
Dil. 1 : 1	4.375	0.44	0.41	0.068	0.052	0.907
Dil. 2 : 1	5.833	0.58	0.54	0.069	0.104	0.915
Dil. 3 : 1	6.563	0.65	0.71	0.092	0.172	0.931
Dil. 4 : 1	7.000	0.70	0.77	0.100	0.118	0.975
S2 thick.	8.750	0.87	0.88	0.011	0.252	0.996
S3	3.960	0.40	0.38	0.050	0.084	0.927
Dil. 1 : 1	4.205	0.42	0.45	0.071	0.126	0.917
Dil. 2 : 1	5.607	0.56	0.63	0.125	0.188	0.901
Dil. 3 : 1	6.308	0.63	0.72	0.143	0.234	0.919
Dil. 4 : 1	6.728	0.67	0.78	0.164	0.296	0.950
S3 thick.	8.410	0.83	0.90	0.084	0.495	0.988