Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Textile Wastewater Treatment by MF-UF Combined Membrane Filtration

MF-UF 분리막 복합공정에 의한 염색가공 폐수처리

  • Yang, Jeongmok (Green Engineering Team, Korea Institute of Industrial Technology (KITECH)) ;
  • Park, Chulhwan (Green Engineering Team, Korea Institute of Industrial Technology (KITECH)) ;
  • Lee, Byunghwan (Department of Chemical System Engineering, Keimyung University) ;
  • Kim, Sangyong (Green Engineering Team, Korea Institute of Industrial Technology (KITECH))
  • 양정목 (한국생산기술연구원 청정공정팀) ;
  • 박철환 (한국생산기술연구원 청정공정팀) ;
  • 이병환 (계명대학교 화학시스템공학과) ;
  • 김상용 (한국생산기술연구원 청정공정팀)
  • Received : 2006.05.29
  • Accepted : 2006.08.08
  • Published : 2006.09.30
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Abstract

Combined membrane process of ceramic microfiltration (MF) and polymer ultrafiltration (UF) was optimized for the removal of color and total organic carbon (TOC) from textile wastewater. Membrane regeneration was performed for the efficient operation by backflushing and chemical cleaning. Flux of 10.3% increased by the pulse backflushing of 1 second every 2 minutes in ceramic microfiltration. Membrane regeneration of 97% was obtained by chemical cleaning with 0.1% sodium hydroxide in polymer ultrafiltration. The removal efficiency of TOC, color and SS (suspended solid) were 84.6%, 97.4% and 100%, respectively. The combined process was found to be suitable for the removal of color and residual organics from textile wastewater.

염색폐수 처리를 위해 세라믹 정밀여과막 (MF)과 고분자 한외여과막 (UF)의 복합공정을 적용, 색도 및 유기물 (TOC) 제거율을 통해 공정을 최적화하고, 염색폐수의 분리효율을 조사하였다. 막 회복을 통한 운전 효율향상을 위해 역세척과 화학세정을 수행한 결과, 역세척에 의한 정밀여과막은 2분 주기로 1초 동안 역세척하였을때 투과수량이 10.3% 증가하였고, 한외여과막은 0.1% 수산화나트륨 용액으로 화학세정하였을 때 97%의 회복률을 나타내었다. 이때, 유기물, 색도, 부유물질(SS)의 제거율은 각각 84.6%, 97.4% 및 100%를 나타내었다. 분 복합공정의 적용은 염색폐수의 색도와 유기물 제거에 효과적임을 확인할 수 있었다.

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