TREATMENT OF EMULSIFIED OIL WASTEWATER BY PULSE ELECTRIC FIELD DEMULSIFICATION-ACTIVATED PERSULFATE PROCESS

HU Xiaomin; JIANG Shuqi

doi:10.13205/j.hjgc.202401008

Volume 42 Issue 1

Jan. 2024

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HU Xiaomin, JIANG Shuqi. TREATMENT OF EMULSIFIED OIL WASTEWATER BY PULSE ELECTRIC FIELD DEMULSIFICATION-ACTIVATED PERSULFATE PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(1): 55-62. doi: 10.13205/j.hjgc.202401008

Citation:

HU Xiaomin, JIANG Shuqi. TREATMENT OF EMULSIFIED OIL WASTEWATER BY PULSE ELECTRIC FIELD DEMULSIFICATION-ACTIVATED PERSULFATE PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(1): 55-62. doi: 10.13205/j.hjgc.202401008

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TREATMENT OF EMULSIFIED OIL WASTEWATER BY PULSE ELECTRIC FIELD DEMULSIFICATION-ACTIVATED PERSULFATE PROCESS

doi: 10.13205/j.hjgc.202401008

HU Xiaomin^,,
JIANG Shuqi

College of Resources and Civil Engineering, Northeast University, Shenyang 110819, China

Received Date: 2022-12-13
Available Online: 2024-04-29

Abstract

Abstract

Emulsion oily wastewater is difficult to treat because of its high concentration of organic pollutants and complex composition. The pulse electric field was used to realize oil-water separation, and persulfate was activated by the pulse electric field to produce SO^-₄·with strong oxidation, which degrades the organic matter in the demulsified wastewater. The results showed that in the pulsed electric field demulsification experiment, when the power supply voltage was 18 V, the solution pH was 2, the power supply frequency was 800 Hz, the duty ratio was 50%, the distance between the electrode plates was 2.5 cm, and the reaction time was 50 min, the demulsification effect was the best, and the COD(with an initial value of 78340 mg/L) removal rate was as high as 98.03. In the experiment of treatment of demulsified wastewater by pulsed electric field activated PMS, when ρ(PMS)∶ρ(COD)=3, solution pH=2, power supply voltage was 15 V, frequency was 3000 Hz, duty cycle was 70%, electrode spacing was 2.5 cm, and reaction time is 2 h, the degradation rate of organic matters in emulsified oily wastewater is up to 60.8%; Under the same conditions, the degradation rate of pulse power+PMS treatment system is 6.4% higher than that of DC power+PMS treatment system.
- emulsion oil wastewater,
- demulsification,
- persulfate,
- electroactivation,
- SO₄^-·

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References(17)

References

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