Research Article
Performance Optimization of Chemical and Green Coagulants in Tannery Wastewater Treatment: A Response Surface Methodology Approach
Table 3
CCD matrix for coagulation experiments using cassava starch orange peel powder coagulants.
| Run order | Independent variables | Responses | Cassava starch | Orange peel powder | Dosage (g/L) | pH, | COD removal, (%) | TSS removal, (%) | SVI, (mL/g) | COD removal, (%) | TSS removal, (%) | SVI, (mL/g) |
| 1 | 10 | 4 | 24.89 | 68.48 | 35.12 | 14.49 | 53.37 | 51.47 | 2 | 7 | 6 | 30.19 | 64.15 | 16.90 | 19.71 | 61.99 | 32.89 | 3 | 10 | 8 | 27.77 | 61.22 | 11.36 | 15.83 | 58.10 | 58.53 | 4 | 7 | 6 | 33.02 | 64.85 | 17.27 | 24.35 | 59.61 | 32.35 | 5 | 7 | 6 | 31.94 | 61.88 | 16.34 | 20.87 | 57.24 | 33.59 | 6 | 7 | 3.17 | 28.03 | 74.42 | 25.36 | 17.97 | 57.67 | 25.57 | 7 | 4 | 4 | 36.11 | 68.21 | 16.97 | 15.94 | 68.68 | 19.60 | 8 | 11.24 | 6 | 31.07 | 65.66 | 27.74 | 15.65 | 56.16 | 66.89 | 9 | 2.76 | 6 | 38.93 | 65.15 | 21.13 | 2.90 | 61.12 | 30.17 | 10 | 7 | 6 | 31.25 | 64.65 | 16.63 | 22.32 | 60.91 | 33.13 | 11 | 7 | 8.83 | 30.56 | 61.45 | 14.05 | 18.55 | 50.08 | 42.48 | 12 | 7 | 6 | 30.19 | 61.02 | 17.76 | 20.29 | 60.69 | 32.30 | 13 | 4 | 8 | 38.19 | 59.79 | 23.68 | 5.22 | 42.07 | 38.05 |
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