Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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The Coagulation Characteristics of Wastewater Using Poly-γ-glutamic Acid

Poly-γ-glutamic acid(PGA)를 이용한 폐수의 응집특성

  • 권귀복 (광운대학교 환경공학과) ;
  • 김동하 (국민대학교 건설시스템공학부) ;
  • 강선홍 (광운대학교 환경공학과) ;
  • 성문희 (국민대학교 자연과학대학) ;
  • 박청 ((주)바이오리더스)
  • Received : 2005.04.12
  • Accepted : 2005.05.25
  • Published : 2005.06.15
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Abstract

Poly-${\gamma}$-glutamic acid (${\gamma}-PGA$), which is extracted from fermented soybeans, is a high molecular weight, adhesive, and negatively charged(anionic) polymer. Recently, ${\gamma}-PGA$ has gained attention due to its potential as polymer. The objectives of this study were to examine the applicability of ${\gamma}-PGA$ as a coagulant and/or a coagulant aid, to evaluate the efficiency of ${\gamma}-PGA$ for the removal of Organic and Ammonium substance in wastewater treatment. The effect of coagulation was evaluated for the removal of SS and organic matter using poly aluminum chloride(PACI) as well as newly developed ${\gamma}-PGA$. The maximum COD removal rate of 63% and the SS of 78% were occurred at the dosage of 50mg/L ${\gamma}-PGA$ only. The most effective removal for particulate and organic matter was occured when both PACI and ${\gamma}-PGA$ were applied at the rate of 20:1(10mg/L PACI and 0.5mg/L ${\gamma}-PGA$). When mixed with PACI, only small portion of ${\gamma}-PGA$ was enough to improve removal efficiencies of organic and particulate matter in wastewater. This result showed the positive potential of ${\gamma}-PGA$ as a new coagulant materials for wastewater treatment.

Keywords

Acknowledgement

Supported by : 국민대학교

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