The Improvement of Bio-gas Production through the Change of Sludge-Recycle Ratio with Two-Stage Anaerobic Digestion (2단 혐기성소화조의 슬러지 반송율 변화를 통한 Bio-Gas 생산 증대)
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- Journal of Environmental Science International
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- v.23 no.6
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- pp.1061-1066
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- 2014