Research Article
Treatment of Cutting Oil-in-Water Emulsion by Combining Flocculation and Fenton Oxidation
Table 2
COD values and COD removal efficiencies of wastewater after treatment at various dosages and pH (stirring speed 80 ppm, stirring time 25 minutes).
| | pH | Al2(SO4)3 (g/L) | C-PAM (mg/L) | COD of treated water (mg/L) | COD removal efficiency (%) |
| | 3 | 3.5 | 0 | 7284 | 95.05 | | 3.5 | 10 | 5582 | 96.20 |
| | 4 | 3.5 | 0 | 5704 | 96.12 | | 3.5 | 10 | 4878 | 96.68 |
| | 5 | 3.5 | 0 | 5024 | 96.58 | | 3.5 | 10 | 4164 | 97.17 |
| | 6 | 3.5 | 0 | 5092 | 96.54 | | 3.5 | 10 | 4298 | 97.08 |
| | 7 | 3.5 | 0 | 5512 | 96.25 | | 3.5 | 10 | 4749 | 96.67 |
| | 8 | 3.5 | 0 | 6022 | 95.91 | | 3.5 | 10 | 4934 | 96.64 |
| | 9 | 3.5 | 0 | 9682 | 93.42 | | 3.5 | 10 | 7012 | 95.34 |
| | 10 | 3.5 | 0 | 12268 | 91.66 | | 3.5 | 10 | 11842 | 91.95 |
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