Table 7 Multiple comparisons of main effects.

From: Establishment of predictive models for head loss and filtration efficiency of pontoon mesh rotary filter based on dimension analysis

Factor

Head loss

Filtration efficiency

Level

Average value

Significance level α = 0.05

Level

Average value

Significance level α = 0.05

Flow rate Q

1

0.2364

a

1

0.7645

a

2

0.2570

b

2

0.7809

ab

3

0.2758

c

3

0.8020

abc

4

0.2960

d

4

0.8137

bc

5

0.3149

e

5

0.8329

c

Sand content S

1

0.2677

a

1

0.7068

a

2

0.2710

a

2

0.7853

b

3

0.2746

a

3

0.8031

b

4

0.2787

a

4

0.8379

c

5

0.2879

b

5

0.8609

c

Aperture of filter screen d

1

0.2678

–

1

0.7821

–

2

0.2750

–

2

0.7922

–

3

0.2852

–

3

0.8221

–

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