【摘 要】
：
The melanoidin containing wastewater was generated from the distillation process in the bioethanol production facility.In this study, the melanoidin in water was decomposed by ozone microbubbles and t
【机 构】
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Department of Chemical Engineering, Nagoya University Furocho, Chikusaku, Nagoya 464-8603 Japan
【出 处】
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The 6th Joint China-Japan Chemical Engineering Symposium(第六届
论文部分内容阅读
The melanoidin containing wastewater was generated from the distillation process in the bioethanol production facility.In this study, the melanoidin in water was decomposed by ozone microbubbles and the effect of operation condition on the decolorization and the total organic carbon was investigated.The rectangular tank was made from transparent acrylic resin.A microbubble generator utilizing liquid shear stress, which consisted of a liquid pump and a special line mixer, was set at side bottom of the tank.For the comparison, a sintered glass gas sparger was used to generate millimeter sized bubble.The decolorization rate of melanoidin aqueous solution for microbubble was much higher than that for millibubbles.The decolorization rate increased with gas flow rate.The total organic carbon for microbubbles decreased linearly with sparging time.However, in the case of millibubbles, the total organic carbon hardly decreased.It is considered that the mineralization of melanoidin needs the high concentration of dissolved ozone in water.
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