Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Comparison of Electrocoagulation and Chemical Coagulation in Removal on Water Treatment

정수처리에서 전기응집과 화학응집의 처리효율 비교

  • 한무영 (서울대학교 지구환경시스템공학부) ;
  • 송재민 (메사추세스 공과대학) ;
  • 박상철 (서울대학교 지구환경시스템공학부)
  • Received : 2004.08.13
  • Accepted : 2004.09.14
  • Published : 2004.10.15
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Abstract

Electrocoagulation has been suggested as a promising alternative to conventional coagulation. The process is characterized by reduced sludge production, no requirement for chemical use, and ease of operation. However, this coagulation has scarcely been studied in water purifying process. This study was performed several batch experiments to compare turbidity removal between electrocoagulation and chemical coagulation. In addition, characteristics of floe were evaluated with zeta potential and particle size distributions. Electrocoagulation showed a relatively higher removal of turbidity (approximately 5%) with the same aluminum amount than conventional chemical coagulation. In addition, turbidity removal by electrocoagulation was less sensitive to pH and was greater for more extensive pH range than chemical coagulation. The results of zeta potential and floc size distributions illustrated that electrocoagulation provided the preferable conditions for coagulation such as zeta potential close to zero millivolt and increased portions of particles in the range of 40 and $100{\mu}m$.

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References

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