Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Improvement of the Advanced Treatment for Nitrogen Removal of Acrylic Fiber Wastewater

아크릴섬유 폐수의 생물학적 질소제거공정의 개선

  • Lee, Chan-Won (Department of Environmental Engineering, Kyungnam University) ;
  • Cho, In-Sung (Department of Environmental Engineering, Kyungnam University) ;
  • Lim, Kyeong-Won (Department of Environmental Engineering, Kyungnam University)
  • Published : 2006.05.01
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Abstract

The effluent discharge standards of industrial wastewater has become more stringent since 2003. Many industrial wastewater treatment plants has been upgraded to advanced treatment facilities. There are high concentrations of nitrate(>200 mg/L) and ammonium(>50 mg/L) nitrogen in the acrylic fiber wastewater of H textile Co. Wastewater from acrylic fiber industry containing acrylonitrile, which may affect the subsequent biological treatment process. Manufacturing of acrylic fiber also produces shock loadings. Excessive acrylonitrile and polymer debris produced in the polymerization process was screened, coagulated with CaO and settled down. A preaeration system was added to treat this high pH effluent to remove volatile organic compound and ammonia nitrogen by the air stripping effect. it was found that nitrification rate was not sufficient in the Anoxic/Oxic(AO) process. One denitrification tank was converted to nitrification reactor to extend HRT of nitrification. Nitrification rate of ammonia nitrogen was promoted from 32% to 67% by this modification and effluent nitrogen concentration was well satisfied with the effluent standards since then.

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References

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