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Table 4 Constraints of optimum condition

From: Process optimization and effect of thermal, alkaline, H2O2 oxidation and combination pretreatment of sewage sludge on solubilization and anaerobic digestion

Name

Goal

Lower Limit

Upper Limit

Lower Weight

Upper Weight

Importance

A: Temperature

Minimize

75

90

1

1

4

B: pH

Minimize

8

12

1

1

4

C: H2O2 Concentration

Minimize

0

60

1

1

4

Cumulative MP

Maximize

314

621

1

1

5

Increase MP

Maximize

0

97.77

1

1

5

Increase of sCOD

Maximize

2.32

19.29

1

1

4

COD solubilization

Maximize

3.65

30.37

1

1

4

Decrease of VSS

Maximize

1.95

19.71

1

1

3

VSS solubilization

Maximize

4.96

50.15

1

1

3

Increase of Protein

Maximize

0.52

3.91

1

1

5

Increase of Polysaccharide

Maximize

0.01

0.59

1

1

2