Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Decolorization of Real Textile Wastewater by Coagulation Conditions

응집조건이 염색폐수의 색도제거에 미치는 영향

  • Received : 2008.08.27
  • Accepted : 2008.11.05
  • Published : 2009.02.10
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Abstract

This study was carried out in order to investigate the decolorization and reduced sludge of real textile wastewater by coagulation process. The aim of the study was to verify the relation between decolorization and coagulants of real textile wastewater treatment processes. Coagulation processes were performed using $FeCl_3$, $FeSO_4$, and $Al_2(SO_4)_3$. Real textile wastewater has a mean concentration for BOD, COD, pH, color to be 800 mg/L, 600 mg/L, 9.7, and 102, respectively. From the experimental results, it was shown that the $FeCl_3$ exhibited higher decolorization at the operating conditions 335~2000 mg/L of coagulants and 500 mg/L NaOH dosage. The efficiency of color removal depended on the wastewater pH and concentration of coagulants.

본 연구는 염색폐수 처리공정에서 발생하는 슬러지 및 색도제거에 관한 연구로 응집제가 색도제거에 미치는 영향에 대한 상관성을 규명하는데 목적이 있다. 이를 위해 실제공정에서 배출되는 염색폐수를 대상으로 응집조건에 따른 특성을 분석하였다. 응집제로 $FeCl_3$, $FeSO_4$, $Al_2(SO_4)_3$를 사용하였으며, 실험에 사용된 염색폐수의 BOD, COD, pH, 그리고 색도의 평균값은 각각 800 mg/L, 600 mg/L, 9.7, 182 이었다. 실험결과에 의하면 응집제의 농도가 335~2000 mg/L 이고 NaOH의 농도가 500 mg/L인 조건에서 응집제로 $FeCl_3$를 사용하였을 때 색도제거효과가 가장 우수하였다. 색도제거효과는 폐수의 pH와 응집제의 농도에 따라 결정된다고 할 수 있다.

Keywords

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