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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2014.3
- 수록면
- 75 - 81 (7page)
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초록· 키워드
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Methanotrophic denitrification under a non-aerated condition (without external supply of oxygen or air) was investigated in a bioreactor coupled with a membrane diffuser. Batch experiment demonstrated that both methane consumption and nitrogen production rates were not high in the absence of oxygen, but most of the nitrate was reduced into N2 with 88% recovery efficiency. The methane utilized for nitrate reduction was determined at 1.63 mmol CH₄/mmol NO₃--N, which was 2.6 times higher than the theoretical value. In spite of no oxygen supply, methanotrophic denitrification was well performed in the bioreactor, due to enhanced mass transfer of the methane by the membrane diffuser and utilization of oxygen remaining in the influent. The denitrification efficiency and specific denitrificationrate were 47% and 1.69 mg NO₃--N/g VSS·hr, respectively, which were slightly lower than for methanotrophic denitrification under an aerobic condition. The average concentration of total organic carbon in the effluent was as low as 2.45 mg/L, which indicatesthat it can be applicable as a post-denitrification method for the reclamation of secondary wastewater effluent. The dominant fatty acidmethyl ester of mixed culture in the bioreactor was C16:1ω7c and C18:1ω7c, which was predominantly found in type I and II methanotrophs, respectively. This study presents the potential of methanotrophic denitrification without externally excess oxygen supply as a postdenitrification option for various water treatment or reclamation.
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UCI(KEPA) : I410-ECN-0101-2017-539-001538975