| Abstract |
| The interest on reuse of wastewater has increased by lack of fresh water supply. Reverse osmosis (RO) process is one of the technology to reuse wastewater. It can be obtained high purity water from wastewater using the revese osmosis membrane. However, it also produces revese osmosis concentrate wastewater, including high levels of organic matter as the result of treatment. This study presents the Fenton`s oxidation treatment as a way to handle the revese osmosis concentrate wastewater. The main objective of this research is to investigate effects of various factors such as pH, hydrogen peroxide (H₂0₂) dose, iron sulfate dose (as ferrous iron, Fe2+) and reaction time for removal of organics in revese osmosis concentrate wastewater by using Fenton`s oxidation process. All tests were proceeding under the three steps: Fenton`s reaction, Neutralization and Sedimentation. The results show that the Fenton`s oxidation treatment was very effective in removing organics in revese osmosis concentrate wastewater. The optimum factors in Fenton`s oxidation process of RO concentrate wastewater were determined; pH 3, 500 mg/L as H₂0₂, 1000 mg/L as Fe2+ and 30 minutes as reaction time. Under the optimum conditions, the removal efficiency of chemical oxygen demand (COD) was about 50 percent. Compared with the other processes, Fenton oxidation has a high removal efficiency of chemical oxygen demand. However, it generates a Fenton sludge and requires additional processing to remove them. Therefore, in order to apply the Fenton`s oxidation in the actual process, it is determined that require additional research on the Fenton sludge treatment. |
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| Key Words |
| Fenton`s oxidation, revese osmosis concentrate wastewater, pH, hydrogen peroxide dose, iron sulfate dose, reaction time. |
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