| Abstract |
| Application of reverse osmosis(RO) membranes is increasing due to the demand increase for the industrial water and sewage reuse recycling rate. However, it produces RO concentrate wastewater. RO concentrate is difficult to handle by conventional wastewater treatment because it contains a high concentration of non-biodegradable organics. So, it`s treatment acts as a bottleneck phenomenon of industrial water production. This study presents the Fenton-like oxidation using zero-valent iron(ZVI) as a way to handle the non-biodegradable organic material in the RO concentrate wastewater. Recently, ZVI has attention as alternative reducing agent in the way that it does not cause toxicity. The main objective of this research is to investigate the effects of a variety of factors such as pH, ZVI dose and reaction time for removal of organics in RO concentrate by Fenton-like oxidation with ZVI. All tests were proceeding under the three steps: Fenton-like oxidation, Neutralization and Sedimentation. The results show that the Fenton-like oxidation with ZVI was able to remove organics in RO concentrate. The optimal factors in Fenton-like oxidation were determined; pH 2 and 2 hours as reaction time. With this condition, the removal efficiency of chemical oxygen demand (COD) was about 37 percent at 500 mg/L as hydrogen peroxide and 750 mg/L as ZVI. Meanwhile, this study represents that the Fenton-like oxidation with ZVI has a lower organic removal efficiency than the Fenton`s oxidation. In order to achieve the same removal efficiency as Fenton`s oxidation, the Fenton-like oxidation with ZVI requires the use of more hydrogen peroxide. |
|
|
| Key Words |
| Fenton-like oxidation, ZVI, non-biodegradable organic matter, revese osmosis concentrate |
|
|
|
|
|
PDF