COD Reduction from Paper Recycling Industries Wastewater Using Electro-Fenton Method

Document Type : Original Article

Authors

1 M.Sc., graduated of Wood and Paper Science and Technology Depts., Agricultural and Natural Resources Faculty, Karaj Branch, Islamic Azad University, Alborz, Iran

2 Agricultural and Natural Resources Faculty, Karaj Branch Islamic Azad University, Alborz, Iran

3 Full Professor r of Wood and Paper Science and Technology Depts., Agricultural and Natural Resources Faculty, Karaj Branch Islamic Azad University, Alborz, Iran

Abstract

The paper recycling industry consumes a significant amount of fresh water in its processes. Complete or major treatment of generated effluent is always one of the priority and policies of industries. In this study, aluminum electrodes with dimensions of 2*150*20 mm were used and by adding hydrogen peroxide to the effluent and performing electro-fenton reaction, the residual concentration of pollutant was measured by spectrophotometer. After obtaining the optimum values of voltage, agitator speed, reaction time, pH, hydrogen peroxide concentration, molar ratio of hydrogen peroxide to iron sulfate and distance between electrodes, the percentage of COD removal was calculated. COD reduction efficiency percent for electro-fenton reaction was 95.50% also the optimized conditions were as follows, voltage: 6 volts, pH: 2, stirring speed: 300 rpm, concentration of hydrogen peroxide: 1000 mg/L, distance between electrodes:3 cm, molar ratio of hydrogen peroxide to iron sulfate:1/4 and  reaction time: 90 minutes. The results showed that the electro-fenton method can be used successfully for wastewater treatment of paper recycling industries.

Keywords

References

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History

  • Receive Date: 20 April 2020
  • Revise Date: 20 May 2020
  • Accept Date: 22 August 2020
  • Publish Date: 20 September 2020

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