碩士 / 國立雲林科技大學 / 環境與安全衛生工程系碩士班 / 101 / This study aimed to explore the influences of different magnetic fields (0 G, 50 G, 100 G, 150 G, 250 G, and 350 G) on facilitating the growth of Nannochloropsis oculata, and N. oculata activity, lipid content, and utilization of nutrients (nitrogen and phosphorous) with different percentages of swine wastewater (10%, 20%, 30%, and 40%) and 2% of CO2.
This study found that with proper magnetic fields, the algae volume and the lipid content were increased. The highest lipid content and algae amount were reached with the magnetic fields of 50 G and 250 G, which were 36.0% and 54.7% higher compared with the control groups. As for adding swine wastewater in the magnetic field for the growth of N. oculata, the growth was the highest with the percentage of 20%. The utilization rates of nutrients NH4+-N and NO3- -N were not high. PO4-3-P was absorbed first. In the aspect of lipid content, it increased as the percentage of wastewater increased. Especially, with 40% of swine wastewater and 50 G of magnetic field, the lipid content could reach 46.19%.
2% of CO 2 was added to different magnetic fields (0 G, 50 G, and 250 G) with 20% of swine wastewater. It was found that the growth rate and dry weight of the algae both increased while the magnetic fields were 50 G and 250 G compared with the control groups. The growth rates were 0.12 day -1 and 0.17 day -1, respectively. The algae dry weights increased by 43.05% and 44.41%, respectively. In the aspect of nutrients, due to the magnetic fields, the increase of N. oculata activity also lead to the increase of utilization rate of nutrients. Under different magnetic fields (0 G, 50 G, and 250 G), compared with the control groups, the lipid content increased from 9.25% to 14.16%, from 16.79% to 18.16%, and from 13.74% to 14.48%, respectively.
| Identifer | oai:union.ndltd.org:TW/101YUNT5633019 |
| Date | January 2013 |
| Creators | Chih-Sheng Hsu, 許志聖 |
| Contributors | Terng-Jou Wan, 萬騰州 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 74 |
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