碩士 / 國立雲林科技大學 / 環境與安全衛生工程系 / 102 / With the rapid increase in energy demand, resulting in depletion of energy and global warming and other environmental problems, thus derive a number of alternative energy development.Bio-fual is an alternative energy is currently the most widely used. Most sources of materials is the food crops that produce food shortages. Bio-fual materials of microalgae are of concern in recent years. In order to achieve a balance between supply and demand, enhance its growth is a key element.In this study,by changing the magnetic field strength and sodium nitrate concentration(NaNO3) of environmental factors in cultured Nannochloropsis oculata. Investigate Specific growth rate of Nannochloropsis oculata of optimal conditions,and using response surface methodology (RSM) to investigate the impact of each factor on the growth of Nannochloropsis oculata and find the best operating conditions.The study is divided into two parts, first, changing the magnetic field strength and NaNO3 concentration in batch experiments and find the best range of Nannochloropsis oculata growth.Second, using response surface methodology to explore the role of each factor influence and determine the optimal operating parameters.The results showed that different magnetic field strength cultured,the optimum Specific growth range of Nannochloropsis oculata is 100 G to 300 G and the different NaNO3 concentration cultured,the optimum Specific growth range of Nannochloropsis oculata is 100 mg/L to 200 mg/L. Response surface methodology that obtained if the magnetic field intensity and NaNO3 concentrations were adjusted 175.4 G and 136.8 mg/L, respectively, the Specific growth rate of Nannochloropsis oculata is 0.24 d-1. The lipid content of Nannochloropsis oculata is rises under applied with no magnetic field or low magnetic field strength, with the reduction of nitrate concentration. In lipid productivity of Nannochloropsis oculata,when the magnetic field intensity and NaNO3 concentrations were adjusted 168.4 G and 140.6 mg/L,the lipid productivity of Nannochloropsis oculata is 278 mg/L. Suitable to be applied magnetic field strength will help Nannochloropsis oculata absorb the culture medium nitrate and can reduce the initial nitrate.
| Identifer | oai:union.ndltd.org:TW/102YUNT0633020 |
| Date | January 2014 |
| Creators | Hsiao-Wen Lin, 林曉汶 |
| Contributors | Shuh-Hwa Lee, 李樹華 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 73 |
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