Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Effect of Hydrogen Peroxide on UV Treatment of Color in Secondary Effluent for Reclamation

물 재이용을 위한 하수처리장 방류수 색도의 자외선처리에 미치는 과산화수소의 영향

  • 박기영 (한국과학기술연구원 환경공정연구부) ;
  • 맹승규 (한국과학기술연구원 환경공정연구부) ;
  • 김기팔 (한국과학기술연구원 환경공정연구부) ;
  • 이석헌 (한국과학기술연구원 환경공정연구부) ;
  • 권지향 (건국대학교 공과대학) ;
  • 안규홍 (한국과학기술연구원 환경공정연구부)
  • Received : 2004.03.15
  • Accepted : 2004.05.03
  • Published : 2004.06.15
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Abstract

In the present study, a feasibility of an advanced oxidation process using UV/Hydrogen peroxide($H_2O_2$) system equipped with a medium pressure lamp for secondary effluent reclamation was investigated. Initial concentration of $H_2O_2$ and pH were changed to determine the optimum operation condition for the system. The removal efficiency of color was than 80% with 14.3mg/L of initial $H_2O_2$ and 5 minute of contact time in the UV/$H_2O_2$ system. The color removal was analyzed using first-order reaction equation. The dependence of rate constant (k) on initial $H_2O_2$ represented the rational relationship with maximum value. Residual $H_2O_2$ caused increase of effluent COD, since analyzing agent, dichromate, reacted with $H_2O_2$ in the sample. Therefore, excess initial concentration of $H_2O_2$ would significantly affect effluent COD measurement. At pH variation experiment, both residual $H_2O_2$ and color showed peak in the neutral pH range with the same pattern. Effect of $H_2O_2$ dose also enhanced color removal but raised residual $H_2O_2$ problem in the continuous operation UV system. In conclusion, these results indicated that medium pressure UV/$H_2O_2$ system could be used to control color in the secondary effluent for reclamation and reuse.

Keywords

References

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