Table 2 Analysis of trend testing in Excel.
From: Wastewater COD characterization: RBCOD and SBCOD characterization analysis methods
Time/min | Time | 0 | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 |
|---|---|---|---|---|---|---|---|---|---|---|---|
Mean mg/(L h) | 46.8 | 39.6 | 28.8 | 22.2 | 20.7 | 18.6 | 17.8 | 17.2 | 16.4 | 15.4 | |
0 | 46.8 | − 7.2 | − 18 | − 24.6 | − 26.1 | − 28.2 | − 29 | − 29.6 | − 30.4 | − 31.4 | |
5 | 39.6 | − 10.8 | − 17.4 | − 18.9 | − 21 | − 21.8 | − 22.4 | − 23.2 | − 24.2 | ||
10 | 28.8 | − 6.6 | − 8.1 | − 10.2 | − 11 | − 11.6 | − 12.4 | − 13.4 | |||
15 | 22.2 | − 1.5 | − 3.6 | − 4.4 | − 5 | − 5.8 | − 6.8 | ||||
20 | 20.7 | − 2.1 | − 2.9 | − 3.5 | − 4.3 | − 5.3 | |||||
25 | 18.6 | − 0.8 | − 1.4 | − 2.2 | − 3.2 | ||||||
30 | 17.8 | − 0.6 | − 1.4 | − 2.4 | |||||||
35 | 17.2 | − 0.8 | − 1.8 | ||||||||
40 | 16.4 | − 1 | |||||||||
45 | 15.4 | ||||||||||
50 | 13.8 | ||||||||||
55 | 13.2 | ||||||||||
60 | 12.6 | ||||||||||
65 | 12.4 | ||||||||||
70 | 11 | ||||||||||
75 | 11.2 | ||||||||||
80 | 11.3 |
Time/min | Time | 50 | 55 | 60 | 65 | 70 | 75 | 80 | BD (+) | BE (−) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
Mean mg/(L h) | 13.8 | 13.2 | 12.6 | 12.4 | 11 | 11.2 | 11.3 | ||||
0 | 46.8 | − 33 | − 33.6 | − 34.2 | − 34.4 | − 35.8 | − 35.6 | − 35.5 | 0 | 16 | |
5 | 39.6 | − 25.8 | − 26.4 | − 27 | − 27.2 | − 28.6 | − 28.4 | − 28.3 | 0 | 15 | |
10 | 28.8 | − 15 | − 15.6 | − 16.2 | − 16.4 | − 17.8 | − 17.6 | − 17.5 | 0 | 14 | |
15 | 22.2 | − 8.4 | − 9 | − 9.6 | − 9.8 | − 11.2 | − 11 | − 10.9 | 0 | 13 | |
20 | 20.7 | − 6.9 | − 7.5 | − 8.1 | − 8.3 | − 9.7 | − 9.5 | − 9.4 | 0 | 12 | |
25 | 18.6 | − 4.8 | − 5.4 | − 6 | − 6.2 | − 7.6 | − 7.4 | − 7.3 | 0 | 11 | |
30 | 17.8 | − 4 | − 4.6 | − 5.2 | − 5.4 | − 6.8 | − 6.6 | − 6.5 | 0 | 10 | |
35 | 17.2 | − 3.4 | − 4 | − 4.6 | − 4.8 | − 6.2 | − 6 | − 5.9 | 0 | 9 | |
40 | 16.4 | − 2.6 | − 3.2 | − 3.8 | − 4 | − 5.4 | − 5.2 | − 5.1 | 0 | 8 | |
45 | 15.4 | − 1.6 | − 2.2 | − 2.8 | − 3 | − 4.4 | − 4.2 | − 4.1 | 0 | 7 | |
50 | 13.8 | − 0.6 | − 1.2 | − 1.4 | − 2.8 | − 2.6 | − 2.5 | 0 | 6 | ||
55 | 13.2 | − 0.6 | − 0.8 | − 2.2 | − 2 | − 1.9 | 0 | 5 | |||
60 | 12.6 | − 0.2 | − 1.6 | − 1.4 | − 1.3 | 0 | 4 | ||||
65 | 12.4 | − 1.4 | − 1.2 | − 1.1 | 0 | 3 | |||||
70 | 11 | 0.2 | 0.3 | 2 | 0 | ||||||
75 | 11.2 | 0.1 | 1 | 0 | |||||||
80 | 11.3 | SUM | 3 | 133 |