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KMID : 1024520140230061061
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Journal of the Environmental Sciences
2014 Volume.23 No. 6 p.1061 ~ p.1066
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The Improvement of Bio-gas Production through the Change of Sludge-Recycle Ratio with Two-Stage Anaerobic Digestion
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Kwon Koo-ho
Lee Tae-woo
Jung Yong-Jun
Min Kyung-sok
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Abstract
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This study has cross checked the change of internal sludge-recycle in Anaerobic-Digestion, and researched about not only the improvement of Bio-gas production from the digested sludge but also the efficient method of sludge minimization. Ultimate object of the study is to reduce the amount of sludge by the improved efficiency of contact with the organic-matter and the microbes in Anaerobic-Digestion. The sludge-recycle fluidized sludge layer and raised the activity of the sludge, the optimal sludge-recycle ratio, VS and COD removal ratio were 1,000%, 28.2% and 27.7%, respectively. Through these results of this study, it may be of use to treat waste sludge by the sludge-recycle ratio in terms of minimization and circulation of resources.
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KEYWORD
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Anaerobic digestion, Sludge, Biogas, Organic waste
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