碩士 / 國立中興大學 / 環境工程學系所 / 98 / Microalga is a photosynthetic microorganism that uses the solar energy to combine water with CO2 create biomass. They can utilize NH4 +, NO3 -, and PO43- as growth nutrients, and remove these inorganic nutrients from wastewater. Microalgae have been suggested as very good candidates for fuel production. In this study the nitrogen and phosphorus assimilation and lipid production by microalgae using wastewater were studied in a 5 L photobioreactor in order to reach the goal of wastewater treatment and energy production.
At first, the conditions for the best growth and lipid accumulation, including the nitrogen species, nitrogen concentration, CO2 concentration and illumination period, with algal medium were investigated in order to choose the better microalgae. Desmodesmus sp. TAI-1 and Chlamydomonas sp. TAI-2, which were isolated from the ponds in middle Taiwan were used. Then the feasibility of nitrogen and phosphorus removal and lipid accumulation with industrial wastewater by the selected microgalgae were tested.
The results showed that where Desmodesmus sp. TAI-1 and Chlamydomonas sp. TAI-2 cultures were performed under nitrogen concentration of 41.2 mg/L, aerated with 5% CO2 , continuous illumination and ten days incubation time had a maximum of lipid contest and lipid yields. Besides, these strains could tolerate CO2 concentration up to 25% and remove all of the nitrogen source within three days. Chlamydomonas sp. TAI-2 was chosen as the better one. With industrial wastewater, Chlamydomonas sp. TAI-2 could remove NH4+-N (38.4 mg/L) or NO3--N (3.1 mg/L) effectively and accumulated or lipid up to 18.4%. Consequently, it is possible to use microalgae to remove nitrogen in the wastewater and subsequently to produce biodisel.
| Identifer | oai:union.ndltd.org:TW/098NCHU5087042 |
| Date | January 2010 |
| Creators | Ai-Ping Huang, 黃愛蘋 |
| Contributors | 李季眉 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 108 |
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