碩士 / 國立高雄第一科技大學 / 環境與安全衛生工程研究所 / 104 / Algae are photo-autotrophic, which could co-exist with the heterotrophic microorganisms and be applied in wastewater treatment as well as fixing carbon dioxide.
In this study, a two-stage upflow photo reactor with continually feeding nitrate and adding bio-agent was established to clarify the relationship between the autotrophic algae and the heterotrophic microorganisms. For this purpose, an experimental design varied on its hydraulic retention time (HRT, 1.0, 2.5, 4.0, 5.5 days) and aeration (0.5, 1.5 L/min). Their experimental results including pH, nitrate, nitrite, ammonium, dissolve oxygen (DO), bacteria growth, and algae growth were reorganized with the multivariate analysis to resolve their relationship.
Experimental results indicate that the HRT of 4 days was a critical point for the algae and bacteria of algae and bacteria. That was because (i) the growth of algae and bacteria would have balance, (ii) the pH increased to 8.0 and initially dropped, (iii) the DO decreased and increased, and (iv) the nitrate decreased and ammonium increased.
The results demonstrate that the algae and bacteria symbiosis would consume the carbon dioxide of waterbody when HRT was less than 4.0 days. However, carbon dioxide and oxygen generating from bacteria and algae, respectively would release to the system while the HRT was greater than 4.0 days. In summary, the algae and bacteria symbiosis would have a dynamic balance when its HRT reached 4.0 days.
| Identifer | oai:union.ndltd.org:TW/104NKIT5519036 |
| Date | January 2016 |
| Creators | Huei-Ling Huang, 黃惠羚 |
| Contributors | Jiunn-Jyi Lay, 賴俊吉 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 123 |
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