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논문 기본 정보

자료유형
학술저널
저자정보
Angkana Jantanaprasartporn (Chulalongkorn University) Suppasil Maneerat (Prince of Songkla University) Chaiwat Rongsayamanont (Center of Excellence on Hazardous Substance Management)
저널정보
대한환경공학회 Environmental Engineering Research Environmental Engineering Research 제23권 제1호
발행연도
2018.3
수록면
28 - 35 (8page)

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초록· 키워드

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17α-ethinylestradiol (EE2), a synthetic estrogen which interfere the endocrine and reproductive function in living organisms, has been found extensively to be deposited into municipal wastewater treatment plants and the environment via human excretion. EE2 has long been known to be efficiently cometabolized by ammonia-oxidizing bacteria (AOB) during ammonia (NH₃) oxidation. Current study aims to investigate the effect of culture history on the biotransformation of EE2 by nitrifying sludge which was enriched under different ammonia loading rates in continuous flow reactors. Result showed that past growth condition largely affected not only the metabolic rate of NH₃ oxidation but also EE2 cometabolism. Sludge previously acclimated with higher NH₃ loads as well as sludge dominated with AOB belong to high growth cluster (Nitrosomonas europaea-Nitrosococcus mobilis) showed higher rate of EE2 biotransformation than those one being acclimated with lower NH₃ loads because of its ability to provide more reducing power from NH₃ oxidation. Moreover, the correlation between the degradation rates of NH₃ and EE2 was higher in sludge being acclimated with higher load of NH₃ in comparison with other sludge. Implication of the findings emphasized the role of volumetric NH₃ loading rate in determining EE2 removal in wastewater treatment system.

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ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References

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