Relatively low efficiency in anaerobic digestion process is mainly caused by unproper mixing method. In this study, tray motion type agitator was applied in actual anaerobic digestion tank in order to improve the digestion efficiency, equalize the flow velocity distribution and energy saving. The impeller of tray motion type agitator was reciprocated vertically. Gas lift type agitator and tray motion type agitator appears almost same mixing efficiency include digestion rates. However, tray motion type agitator have shown that lower energy consumption compared to the conventional gas lift type agitator. Implementation of tray motion type agitator in the anaerobic digestion tanks contributed to the stabilization of mixing environment, efficiency and energy efficiency of the tank.

• 주윤식(주식회사 우진 기술연구소) | Yoon-Sik Joo (Technology R&D Center, Woojin Co., Ltd.)
• 손건태(금오공과대학교 환경공학과) | Guntae Son (Department of Environmental Engineering, Kumoh National Institute of Techonology.)
• 배영준(주식회사 우진 기술연구소) | Youngjun Bae (Technology R&D Center, Woojin Co., Ltd.)
• 박정수(주식회사 우진 기술연구소) | Jungsoo Park (Technology R&D Center, Woojin Co., Ltd.)
• 이승환(금오공과대학교 환경공학과) | Seunghwan Lee (Department of Environmental Engineering, Kumoh National Institute of Techonology.) Corresponding author