Kyoto University · Environmental Science
오시타 카즈유키 교수의 연구실은 생활 폐기물 및 세균 처리 잔여물에서 에너지 자원을 회수하는 데 초점을 맞추고 있습니다. 주로 활성 슬러지와 세척 잔여물에서 지방질 성분을 효율적으로 추출하고, 이를 바이오디젤 등 청정 에너지로 전환하는 기술 개발을 중심으로 연구를 진행하고 있습니다. 특히 라이플리파이드 디메틸에테르(DME)를 활용한 지방 추출 및 슬러지 건조 기술을 핵심으로 하며, 이 과정에서 발생하는 바이오가스의 실시간 모니터링과 실리콘 화합물 제거 기술도 함께 연구하고 있습니다.
Figures are computed from collected data and may differ slightly.
We investigated the behaviour of siloxanes, which adversely affect biogas engines, as well as their concentration levels in sewage sludge biogas in Japan. We also performed experiments on the absorptive removal of siloxanes using various adsorbents and determined the main adsorbent characteristics required for the removal of siloxanes. The results of our study on the concentration and composition of siloxanes in biogas were similar to previous reports. Moreover, we found that the concentration o
Liquefied dimethyl ether (DME) was used to extract lipids from sewage sludge. Factorial experimental analyses were used to evaluate the influence of different variables on raw lipid extraction and sludge drying. The DME method was compared with the Bligh and Dyer (B&D) method for three undigested and two anaerobically digested dewatered sludges. The results indicate that although the raw lipid yield of the B&D method was 5% higher than that of the DME method, the proportion of fatty acid methyl
This article describes the dewatering of sewage sludge using liquefied dimethyl ether (DME), which clarified the effect of sludge type and its particle size. Changes in the heating value of the dewatered sludge were also examined. In addition, the change in dewaterability upon reuse of the liquefied DME was investigated experimentally. Regardless of the nature of the sludge, its dewatering behavior was similar. The amount of dewatered water could be increased by decreasing the diameter of the sl
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