How effective is the electro-Fenton device in treating oily wastewater?
Oily wastewater is a common type of wastewater in industrial production. It has a wide range of sources, a large amount of wastewater, and complex components. It is difficult to directly treat biochemically and is difficult to treat. The electro-Fenton method has a good oxidation effect and can decompose oils and pollutants in wastewater. What is the principle and effect of electro-Fenton in treating oily wastewater?
Principle of electro-Fenton in treating oily wastewater
The reaction principle of electro-Fenton in treating oily wastewater is to pass electricity into the wastewater. The ·OH produced by the catalytic decomposition of H2O2 by Fe 2+ has a high redox potential (2.8v), which can decompose oils and other pollutants in the wastewater. The gas produced in this process has a flotation effect, and the Fe(OH) 3, Fe(OH) 2 and other precipitations produced have a coagulation effect. Therefore, the electro-Fenton method effectively removes the oil content and other difficult-to-degrade organic matter in the emulsified oily wastewater through the combined action of coagulation, flotation and strong oxidation.
Effect of electro-Fenton treatment of oily wastewater
This paper takes emulsified oily wastewater as the research object and uses inorganic salt-electro-Fenton method for treatment. Through experimental research, the following conclusions are obtained:
The electro-Fenton treatment of wastewater shows that the H 2 O 2 dosage has the greatest impact on COD removal rate. When the pH value is 3.5, the current density is 13.7mA/cm 2, the H 2 O 2 dosage is 1.05mmol/L, and the dosage is 9 times, the COD removal rate reaches a maximum of 92.6%; the pH value has the greatest impact on the oil removal rate. When the pH value is 3, the current density is 11.5mA/cm 2, the H 2 O 2 dosage is 1.15mmol/L, and the H 2 O 2 is added 9 times, the maximum oil removal rate is 91.8%.
Application Areas
Printing and dyeing wastewater
Garbage leachate
Coal chemical wastewater
Emulsion wastewater
Pesticide wastewater
Pharmaceutical wastewater
Dye industry wastewater
CASE SHOW
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