Research Article
Phosphate and Nitrate Removal from Coffee Processing Wastewater Using a Photoelectrochemical Oxidation Process
Table 3
The characteristics of coffee processing wastewater treated by photoelectrochemical oxidation.
| | Treatment designs | Major pollutants | CPWW before treatment | CPWW after treated | Removal efficiency (%) | Permissible WHO standard for effluents |
| | ECO/CaCl2 | Nitrate (mg/L) | 23.21 | 2.243 | 90.334 | 5 mg/L | | Phosphate (mg/L) | 9.21 | 0.658 | 92.855 | 5 mg/L | | ECO/CaCl2 and UV/H2O2 | Nitrate (mg/L) | 23.21 | 0.041 | 99.823 | 5 mg/L | | Phosphate (mg/L) | 9.21 | 0.008 | 99.982 | 5 mg/L |
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