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Table 4

Removal efficiency of COD, BOD and ammonia for all operations

Operation nameCOD
BOD
Ammonia
Avg (%)StdevnAvg (%)StdevnAvg (%)Stdevn
Control 93.4 5.9 98.3 2.1 97.8 3.2 
Operation 1 92.3 4.5 98.9 0.5 97.7 2.0 
Operation 2 91.3 6.3 96.6 2.4 95.3 5.2 
Operation 3 92.2 5.1 14 97.6 2.6 10 98.4 2.8 16 
Operation 4 95.9 3.2 98.0 1.6 99.2 0.4 
Operation 5 91.0 7.8 16 97.9 2.1 14 98.9 1.0 10 
Operation 6 91.3 5.7 28 97.7 2.1 13 99.3 0.5 19 
Operation 7 91.2 8.4 18 98.2 2.6 12 97.6 4.2 15 
One-way ANOVA P-value = 0.8977 > 0.05 P-value = 0.8743 > 0.05 P-value = 0.1169 > 0.05 
Kruskal-Wallis test P-value = 0.741 > 0.05 P-value = 0.791 > 0.05 P-value = 0.401 > 0.05 
Operation nameCOD
BOD
Ammonia
Avg (%)StdevnAvg (%)StdevnAvg (%)Stdevn
Control 93.4 5.9 98.3 2.1 97.8 3.2 
Operation 1 92.3 4.5 98.9 0.5 97.7 2.0 
Operation 2 91.3 6.3 96.6 2.4 95.3 5.2 
Operation 3 92.2 5.1 14 97.6 2.6 10 98.4 2.8 16 
Operation 4 95.9 3.2 98.0 1.6 99.2 0.4 
Operation 5 91.0 7.8 16 97.9 2.1 14 98.9 1.0 10 
Operation 6 91.3 5.7 28 97.7 2.1 13 99.3 0.5 19 
Operation 7 91.2 8.4 18 98.2 2.6 12 97.6 4.2 15 
One-way ANOVA P-value = 0.8977 > 0.05 P-value = 0.8743 > 0.05 P-value = 0.1169 > 0.05 
Kruskal-Wallis test P-value = 0.741 > 0.05 P-value = 0.791 > 0.05 P-value = 0.401 > 0.05 
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