Ⅰ. Introduction of Study
1. Background of study
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light and water, those free complex carbohydrates turned into fermentable sources through pre-treatment process - saccharification. Then, it can be changed ethanol form through fermentation by yeast or genetically engineered E.coli and we can produce biofuel from that ethanol. Now, the way of decreasing process and cost are studied from a few researchers. So we will show the whole process of the
2. 2. Extraction
After the fermentation, the microorganisms(Alcaligenes latus) are filled with PHB in their body. These PHBs have to be separated from microorganisms to make final product. To separate PHBs from biomass, they are extracted from biomass by using solvent. These PHB extracted solvent will experience washing and drying process. After that, PHB can be precipitated as white powder.
2.3.3 Process Explanation
1) Foolish Model
주어진 raw meterial에서 glucose를 얻는 당화공정과 이후 fermentation을 이용해 ethanol을 얻는 process로 실제의 공정보다 매우 단순화 되어있는 model. ethanol 생성공정을 거치면서 발생한 impurity는 이 모델에 포함된 centrifuge공정에 의해 분리되어 처리된다. foolish model의 output 으로
* Deep penetration welding
충분히 높은 에너지 밀도에서 레이저 빔은 작업 공간에 있는 재료의 소재의 표면이 기화하기 시작하는 정도까지 열을 가하게 된다.
레이저 자극은 대략 106 / cm2 을 넘어서야 한다. 재료의 기화가 됨에 따라서 사라지는 금속수증기의 압력의 결과 키홀(keyhole)은 소재에 생성된다. 기