碩士 / 淡江大學 / 水資源及環境工程學系碩士班 / 103 / Owing to the rising awareness of environmental protection, sustainable development is being required and meets the needs of enterprises. Sustainable development is the development that meets the needs of the present without compromising the ability of future generations to meet their own needs. All impacts to environment should be considered comprehensively into the life cycle assessment of one product.
The aims of this study: (1) evaluate the life cycle assessment of thin film solar distillation desalination plant, (2) explore the environmental impacts of raw material use during the construction procedure and the impacts to desalination process, and (3) provide more useful environmental loading analyses to further studies.
The software, GaBi6, was used to calculate the impacts of Eco- indicator 99. GaBi6 provided modules to model these three cases: whole solar thin film distillation desalination systems (SE), reverse osmosis desalination systems (RO), and thin film distillation desalination systems mixing energy (HE). Each of cases was hypothesized that 100 m3 of fresh water produced per day to evaluate impacts on construction procedure and operating procedure.
The results showed the impacts in orders on entire construction procedure were following: SE > RO > HE, which reflected the differences of seawater transfer efficiencies. The transfer efficiencies of SE and HE were the same as 10%, while that of RO was 30%. In other words, larger instruments, plants, and land-use were required in SE and HE rather to RO. On the operating procedure, the impacts in orders were RO > HE > SE, owing to the “energy use”. In Taiwan, most generations of electric powers were by coal-fired. As a result, fossil fuels increased the emission of sulfur and nitrogen oxides, and raised the risk of inorganic substance-intake.
Besides, solar disks were manufactured by Aluminum, so the total environmental impacts were in sequence of SE > HE > RO. In the case of operating procedure, the impacts of RO were far more than these of SE, or HE.
In the case of construction procedure, the solar disks, plant-size, and tankages of SE, or HE were about three times than these of RO. The contributions of inorganic respiratory, fossil fuels, and climate change were the most significant impact items to environment.
Once the Recycling aluminum applied in the solar disks of SE or HE, total impacts decreased significantly. The total environmental impacts were in sequence of RO > HE > SE. The risks of human health were raising by means of the electric power produced .
| Identifer | oai:union.ndltd.org:TW/103TKU05087001 |
| Date | January 2015 |
| Creators | Chen-Jhe Tang, 唐晟哲 |
| Contributors | sue-Huai Gau, 高思懷 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 118 |
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