碩士 / 國立交通大學 / 工學院永續環境科技學程 / 102 / Conscious of environmental protection was high during this decade. EPA of Taiwan regulated the discharge regulation of opto-electronics, sewer system of science parks and semiconductor manufacturing industries. Ammonia nitrogen and toxicity were regulated for these high-tech industries. There are many chemicals applied in these high-tech industries, especially for TMAH. TMAH is a toxic organic nitrogen compound. After biodegradation, TMAH is degraded to ammonia nitrogen and released to the water body. Thus, toxicity reduction and toxicity evaluation are two major issues for high-tech industries to obey the new regulation of ammonia nitrogen and toxicity.
Establishment of Cyclops lab test including the Cyclops characteristics as well as parameters of quality accuracy and quality control was one of the major goals of this study. Ammonia, TMAH and nitrite compounds were found out their toxicity. Meanwhile, mixtures of each compound were also evaluated.The result indicated that the higher ammonia concentration, the higher toxicity phenomenon was found with R2 of 0.9445. TMAH and nitrite compounds had the same result with ammonia with R2 of 0.9965 and 0.9842, respectively.Toxicity evaluation of the mixture of ammonia, TMAH and nitrite indicated that the toxicity was raised with multiple effects and belonged to synergistic effect.
An anaerobic treatment process (UASB) was applied to degrade TMAH compound. The ammonia released from TMAH degradation was then treated by an anaerobic ammonia oxidation (anammox)process from ammonia to nitrogen gas. The result indicated that the removal efficiency of TMAH compound was higher than 95 % in the UASB and most of the TMAH was degraded to ammonia. The ammonia removal efficiency of the anammox process was about 90 %. After treatment of the UASB and anammox processes, toxicity of TMAH compound was lower down. The result indicated that anaerobic process including UASB and anammox was one of the suitable biological techonologies for the TMAH and ammonia removal of high-tech industries
| Identifer | oai:union.ndltd.org:TW/102NCTU5087093 |
| Date | January 2014 |
| Creators | Perng, Shwu-Huey, 彭淑惠 |
| Contributors | Chen, Chung-Yuan, Chou, Shan-shan, 陳重元, 周珊珊 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 72 |
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