碩士 / 朝陽科技大學 / 環境工程與管理系碩士班 / 101 / Aquaculture is one of the main causes of water shortages and eutrophication. In order to solve the problems caused by aquaculture, water recirculating technology is a trend under development. In this project, using immobilized microorganism, ultra-filtration, and combined immobilized microorganism and ultra-filtration in series (combined system) to treat the simulated water in recirculation aquaculture systems. Examination of water quality includes NH4+-N, NO2－-N, NO3－-N, and COD in low and high concentration simulated water. Combined system applied to simulated aquaculture recirculating water with low concentration has effective removals of the pollutants. NH4+-N, NO2－-N, and NO3－-N removal ratios are higher than 80%. After 24 hours of water recirculating in combined system, NH4+-N, NO2－-N and NO3－-N removal ratios are higher than 95%. The pollutants concentration after the treatment by combined system conforms to water quality standard for aquaculture, but the water quality with only immobilized microorganism system or ultra-filtration system is not suitable for aquaculture. When combined system applied to a simulated high concentration of pollutant waster, the pollutants removal ratios could not conform to water quality standard for aquaculture because of higher pollutant concentration and lower retention time. Experimental results indicated that combined system was suitable for aquaculture recirculating water. Combined system can stabilize water quality for a suddenly high pollutants level. Water recirculation for aquaculture has a lower demand for fresh water resource and a lower pollution to water body. Water recirculation also gives a good water resource and water quality for Aquaculture.
| Identifer | oai:union.ndltd.org:TW/101CYUT5087028 |
| Date | January 2013 |
| Creators | Chun-Yu Cheng, 鄭淳宇 |
| Contributors | Wen-Yu Wang, 王文裕 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 122 |
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