Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Isolation and Characterization of Terephthalic Acid-degrading Bacteria

Terephthalic Acid 분해 세균의 분리 및 특성

  • 김재화 (경북대학교 식품공학과) ;
  • 이창호 (경북대학교 식품공학과) ;
  • 우철주 (경북대학교 식품공학과) ;
  • 주길재 (경북대학교 농화학과) ;
  • 서승교 (대구산업정보대학 환경관리과) ;
  • 박희동 (경북대학교 식품공학과)
  • Published : 1999.04.01
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Abstract

A bacterial strain, designated T116, degrading terephthalic acid (TPA) was isolated from the soil around Taegu industrial area into which dye works wastewater flow. The isolate was identified as pseudomonas sp. based on its morphological and physiological characteristics. Degradation of TPA by the strain T116 was confirmed with UV scanning and HPLC. About 90% and 98% of TPA were degraded after 36 and 60 hours, respectively, during the culture in a liquid medium containing 0.1% TPA. Addition of KH2PO4 at a final concentration of 100ppm enhanced the chemical oxygen demand (COD) removal rate about 50% from dye works wastewater by Pseudomonas sp. T116. Optimum pH and temperature for COD reduction from wastewater were 7.0 and 3$0^{\circ}C$, respectively. The bacterium was applied to the continuous culture for the treatment of dye works wastewater whose TPA concentration and CODMn were 2,200ppm and 1,620ppm, respectively. It was observed that 90-95% of COD was eliminated after 4 days culture in the continuous culture with a retention time of 37 or 47 hours.

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