碩士 / 長庚大學 / 化工與材料工程研究所 / 91 / The reduction of glasshouse gas has become the global goal in the 21st century. The effect of CO2 reduction will result in revolution of the energy and industrial structure in Taiwan. The new energy research and the techniques for CO2 reduction also provide new opportunity to develop related technology. However, under subjective and objective circumstances, all of alterations require endless time. The energy department of the United States depicted that the emission of the CO2 cannot be declined to the security range if such strategy only depends upon to achieve high efficiency of the energy use and using substitute of energy. Therefore, it has drawn much attention for researchers to study immobilization of CO2. Using Biological method for CO2 fixation has recently been reported as an efficient mechanism, most natural and economic to reduce the emission of CO2. Among those bio-materials employed for study of CO2 fixation, algae has been studied widely and drawn much attention.
The study present here is to investigate influence of the chlorella growth rate under several of cultural conditions in agitating type of reactor or the fluxion type of reactor. The growth yield and growth rate of the chlorella to fix CO2 are also discussed in respect of changes of the light intensity, CO2 concentration, ventilate number, agitating velocity, inoculum’s concentration, and cultural solution.
The experiment results indicated that the growth yield and growth rates of chlorella increased as light intensity increased while it doesn''t reach light saturation in either agitating type or fluxion type of reactors. The study also demonstrated that the light intensity relates to concentration of chlorella (X) as chlorella growth achieved exponential growth phase at same level of light intensity and reactor. In the agitate type reactor while light intensity at 3K Lux and 9K Lux, the relationships were found X=2x106t and X=7x106t, respectively. Moreover, the influences of light intensity on growth yield in the fluxion type reactor were indicated as folloing equations: X=3x106t (light intensity 3.5K Lux) and X=8x106t (light intensity 10K Lux). As those equations mentioned above, the growth yield of the chlorella in the exponential growth phase can be obtained.
In the study of the agitating type reactor, the optimum growth conditions were found that the agitate velocity at value of 400~450 rpm, CO2 ventilate number in a value of 150~250 ml min-1 as well as optimum inoculums concentration below 25%. Moreover, due to primary purpose of the study of the fluxion type reactor is fixation of flue gas generated from thermal power plant in respect of considering efficiency of CO2 fixation and economic cost, the optimum cultural concentration is 15% of CO2 and can be up to 20% of CO2 concentration.
| Identifer | oai:union.ndltd.org:TW/091CGU00063064 |
| Date | January 2003 |
| Creators | yao-hsing chiu, 邱耀興 |
| Contributors | Ruey-Chi Hsu, 許瑞祺 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 69 |
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