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Ourococcus multisporus YSW008을 이용한 폐수고도처리 및 바이오에너지 생산 가능성 평가

Evaluation of Ourococcus multisporus YSW008 for Advanced Wastewater Treatment with Simultaneous Biofuel Feedstock Production

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초록

Ourococcus multisporus YSW008(O. multisporus)을 이용한 폐수 내 질소와 인 제거 효율과 생산된 바이오매스의 에너지 전환가능성을 검토하였다. 하수에서 10일 동안 배양 시 바이오매스 생산량은 0.2-0.22 g/L 로 양돈폐수에 비해 생산량이 높았으며, 질소, 인 제거효율은 각각 94와 95% 이상으로 나타났다. 바이오매스 내 탄수화물 및 지방산 함량은 하수에서 배양 시 양돈폐수 배출수 적용 시 보다 각각 최대 31 및 9% 증가되었다. 또한, 지방산 성분 중 고품질 바이오디젤 생산에 적합한 올레산(C18:1n9c) 함량이 하수에서 배양 시 양돈폐수 배출수 보다 약 2.5배 이상 증가되었다. O. multisporus 종은 하수에서 배양 시 고도폐수처리 및 고품질 바이오연료 전환에 적합하다고 판단된다.

Abstract

This study demonstrates the potential of Ourococcus multisporus YSW008 for removal of nitrogen and phosphorus from different types of wastewaters(municipal wastewater - influent, secondary and tertiary effluents, and piggery wastewater effluent) with simultaneous production of algal biofuel feedstock. Municipal wastewater supported a higher growth(0.2 to 0.22 g/L) compared to the piggery wastewater after 10 days of cultivation. Removal efficiency of nitrogen and phosphorus in municipal wastewater was 94 and 95%, respectively. The microalgal carbohydrate and fatty acid contents cultivated in municipal wastewater were 31 and 9% higher compared to the piggery wastewater. The content of oleic acid was 2.5 times higher in the municipal wastewater than in the piggery wastewater. The results showed that O. multisporus has a higher potential of nitrogen and phosphorus removal from municipal wastewater compared to piggery wastewater, with simultaneous production of algal biomass for biofuel feedstock.

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