| Summary: | 碩士 === 嘉南藥理大學 === 環境工程與科學系 === 102 === The study focused on environmental impact and eco-efficiency for wood of Taiwan by Life Cycle Assessment (LCA), and guide for the green products. Compare with environmental impacts and eco-efficiency among the wood, high density polyethylene (HDPE) and wood plastic composites (WPC) according to the energy inputs, carbon footprint, ecological toxicity and other environmental impact categories. The results contain four parts, the first part was LCA results and interpretation; the second part was the energy consumption, carbon footprint and eco-toxicity among three materials; the third part of eco-efficiency results; and the last was environmental improvement simulations. The results indicated, (1)About LCA results, the HDPE energy was with 118.04MJ, the next was WPC with 70.45MJ, and the least was the wood with 23.12MJ, respectively; (2)The carbon footprint of WPC was less with 8.10 KgCO2-eq., the next was wood with 8.27kgCO2-eq.; (3)The HDPE eco-efficiency was better than the WPC, the value was 5.62NT$/kgCO2-eq. and 3.85NT$/kgCO2-eq.; (4)The heat pump alternation decreased by 2.35MJ energy input compared with the dry kiln process, and the carbon footprint benefit with 5.73kgCO2-eq.; Compare with the wood preservation and free preservation scenarios, the benefit indicate increasing the using lifetime but increasing the eco-toxicity value span the life time.
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