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디스포저(부엌용 오물분쇄기)-배수 전처리 방식 별 수질기준
장호남,정창문,강종원,최진달래,박영숙,구자공 유기성자원학회 2011 유기물자원화 Vol.19 No.2
수분함량이 많은 음식물 쓰레기의 특성상 아파트에서는 디스포저를 사용하여서 음식물 쓰레기를 처리하여야한다. 쾌적한 아파트 생활을 위해 배수전처리시설을 설치하여 집단적으로 잉여 오염물을 경제적으로 처리하되, 지나친 BOD 제거 기준 등은 도시하수 종말치리장에서 질소·인의 처리에 지장이 없도록 BOD/N의 비율을 5이상으로 유지하여야 한다. 배수전처리시설의 관리 및 규제는 배관방식에 따라 다양한 방법이 개발될 수 있으며 BOD/N을 동시에 전처리시설에서 함께 처리하는 것은 win-win 전략이라고 할 수 있다. 스크린 혹은 침전 방식에 의하여 분리된 입자는 메탄발효로 바이오가스를 발생시켜 혐기조보온용으로 사용하거나 혹은 탈질용 휘발성유기산(volatile fatty acids, VFAs)으로 만들어 탈질용 electron donor로 활용하는 것이 타당하다. 정부는 서울시 시범사업과 같은 사업을 약 5년간 기한을 정하여 디스포저 음식물쓰레기 기술개발업체와 아파트 건설업체가 공동으로 기술개발/활용하도록 한다. Use of disposer at the kitchens of Korean apartments is inevitable in treating their foodwaste having a water content of more than 80%. Also we have to ensure that this extra disposer-foodwaste BOD loadings be treated properly by installing/operating a pre-treatment system before this wastewater enters public sewer system. However, the degree of BOD removal should not be excessive since a BOD/N ratio higher than 5 is required for removing N/P at a municipal wastewater treatment plant. The removal of BOD/N in the pretreatment system rather than BOD alone can be an alternative solution in solving this problem. The particles separated by sedimentation, screen or packed-bed can be anaerobically digested at apartment sites to generate biogas that can be used for simple digester heating and to generate volatile fatty acids (VFAs) for nitrogen removal. We suggest that Korean government grants a temporary license (say for 5 years) to foodwaste treatment companies in collaboration with apartment construction companies which may do business and develop various kinds of disposer-foodwaste treatment systems in diverse wastewater discharge systems of Korean apartments.
배준호,정창문,장호남,박준택 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1
Bacteriorhodopsin is a light-sensitive protein in the purple membrane of halobacteria and is currently considered as a promising candidate raw material in the design of molecular electron device and optical computers. Despite this diverse and potential possibility, there are still difficulties in yieldingbacteriorhodopsin. In the survey of yield and purity among the existing methods, major loss of bacteriorhodopsin was found in the middle step-the condensation of cell membrane fractions by ultracentrifuge. What is worse, it takes a lot of lead time and cost which is of operating and handling. Therefore, in order to develop the separation process for bacteriorhodopsin which is efficient and capable of scale-up, aqueous two phase interfacial condensation is examined. Also, protein precipitation using ammonium sulfate is examined to compare with two aqueous phase system in yield and purity. Furthermore, centrifugation and gel permeation chromatography are applied to aqueous two phase system.