| Summary: | 碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 106 === Diacetone Alcohol (DAA) is often used as a solvent component in water paints due to its suitable polarity and volatility. Spraying plants typically remove solvent vapors from the exhaust by means of water curtain equipment, so DAA is also one of the main organic pollutants in the plant wastewater. The typical Chemical oxygen demand (COD) of such wastewater can reach nearly 10,000 mg/L, but according to the environment regulation of ROC, it must be treated to less than 100 mg/L.
In this study, a half-batch reactor was used to carry out the Fenton Method to treat simulated wastewater containing 5000 mg/L DAA (COD about 13,000 mg/L), and the Taguchi Methods were used to obtain the most economic operating parameters. The experimental results show that FeSO4 is added at a rate of 0.5g/min for 0.5L simulated wastewater, H2O2 is added at a rate of 2.5 g/min, and the Fenton reaction system controlled at pH 1.5 to reach the lowest cost for wastewater treatment.
In addition, based on the time of CO2 formation in the Fenton reaction, this study demonstrates that the temperature rise of the reaction system is mainly due to the heat of reaction released by the mineralization step. Basing on this phenomenon, the temperature change of the reaction can be used as an indicator in industries to point out that the high COD wastewater has been treated.
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