Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Characterization of Natural Organic matter by Rapid Mixing Condition

급속교반조건에서 Alum 응집제의 가수분해종 분포특성과 유기물특성변화

  • 송유경 (부경대학교 토목공학과) ;
  • 정철우 (울산산업진흥 TP 전략산업기획단) ;
  • 손희종 (부산광역시 상수도사업본부 수질연구소) ;
  • 손인식 (부경대학교 토목공학과)
  • Received : 2006.03.20
  • Accepted : 2006.08.03
  • Published : 2006.08.15
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Abstract

The overall objective of this research was to find out the interrelation of coagulant and organic matter during rapid mixing process and to identify the change of organic matter by mixing condition and to evaluate the effect of coagulation pH. During the coagulation, substantial changes in dissolved organics must be occurred by coagulation due to the simultaneous formation of microflocs and NOM precipitates. Increase in the organic removal efficiency should be mainly caused by the removal of microflocs formed during coagulant injection. That is, during the mixing period, substantial amount of dissolved organics were transformed into microflocs due to the simultaneous formation of microflocs and NOM precipitates. The results also showed that 40 to 80% of dissolved organic matter was converted into particulate material after rapid mixing process of coagulation. During the rapid mixing period, for purewater, formation of dissolved Al(III) (monomer and polymer) constant by rapid mixing condition, but for raw water, the species of Al hydrolysis showed different result. During the rapid mixing period, for high coagulant dose, Al-ferron reaction increases rapidly. At A/D(Adsorption and Destabilization) and sweep condition, both $Al(OH)_3(s)$ and dissolved Al(III) (monomer and polymer) exist, concurrent reactions by both mechanism appear to cause simultaneous precipitation.

Keywords

References

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