同槽硝化脫硝反應去除廢水氨氮之研究
| Autor: | TSAO, MING-CHE, 曹明浙 |
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| Rok vydání: | 2003 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 This study is to investigate the removal of ammonia with Pseudomonas stutzeri, and the simultaneous nitrification and denitrification（SND）. Furthermore, we used immobilized cells to find the factors affecting the efficiency of nitrification and denitrification in continuous-flow system. And we also used the piggery wastewater in continuous flow system to evaluate the availability of removal of nitrogen compounds in the wastewater. At last, we trace the strains in the immobilized cells to verify the feasibility of immobilized cells used in the continuous-flow system. Continuously monitoring batch reactor with silicone tubing was used to verify the SND reaction under different levels of dissolved oxygen concentrations（DO＜1 mg/L and DO＞2 mg/L）of the suspended cells, and it demonstrated better nitrification and denitrification efficiency under higher DO level. Similar results was also observed with the immobilized cells. The factors affecting nitrification were carbon and ammonia concentrations, and those affecting denitrification were carbon and nitrate concentrations, while operating in continuous-flow reactor altering different substrate conditions with immobilized cells. It was found that nitrification efficiency was independent of ammonia and denitrification was independent of nitrate when the carbon source is sufficient. When the continuous flow test was performed with piggery wastewater, nitrification efficiency was unobvious due to the different carbon sources, and ammonia reduction efficiency was only at 30%. Otherwise, denitrification efficiency was less affected, it can reach 93% when C/N＝20. Tracing the strains in the immobilized cells with molecular-biological method after the continuous-flow test, the strain can still be conserved in the immobilized cells, and it appeared that immobilized cells were able to maintain the strains from being washed out. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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