Table 7: Analysis of variance (ANOVA) for removal efficiency (%).

SourceDFSum of squares (SS)Mean square (MS) value

A 1819.11819.11947.380.021
B 1896.55896.551036.940.020
C 1334.50334.50386.880.032
A * B 1238.38238.38275.710.038
A * C 196.5496.54111.650.060
B * C 161.6661.6671.320.075
Error10.860.86

Total72447.61

Main effects32050.16683.387790.400.026
2-way interactions3396.58132.193152.890.059
Residual error10.860.865

Total72447.61