| Summary: | 碩士 === 環球科技大學 === 環境資源管理所 === 101 === There are large amount of campus yard wastes produced in most of the elementary and junior high schools in Taiwan. The commonly ways to treat the problem are landfill and incineration, which cause foul smell, messy, and air pollution. In recent years, the implement of sustainable campus has put emphasis on leaves compostation, however, it doesn't work well because of some restricts, such as the culture of degrading bacteria, the maintance of suitable moisture, and the fact that the speed of decomposition is much slower than the speed of leaf yielding. Therefore, we try to solve the problem of campus yard waste by utilizing the pyrolysis and the the conception as well as the character of bio-carbonization.
Bio-carbonization is a new idea of carbon reduction, which is beneficial to the enviornment in many aspects. The study aimed to use the the conception of bio- carbonization to deal with campus yard waste. Using easily operated bio-carbonization stove in the campus to realize the influence of the reaction time and the reaction temperature on the carbon yield rate.
The result from temperature-rising rate indicated that the average carbon yield rate of a low-capacity bio-carbonization stove were as follows: the average carbon yield rate of leaves at 300℃/100min is 25.01%, 30.07% for branch at 300℃/100min, and 27.95% for mixture of leaves and branch at 300℃/100min; 25.35% for leaves at 350℃/70min, 30.21% for branch at 350℃/70min ,and 28.09% for mixture of leaves and branch at 350℃/70min; 25.67% for leaves at 400℃/40min, 30.54% for branch at 400℃/40min, and 28.21% for mixture of leaves and branch at 400℃/40min. After practical operatiion, the results were as follows: the average bio-carbonization yield rate at 300℃/100min is 29.31%, 29.67% at 350℃/70min, and 30.36% at 400℃/40min. According to the results of practical operation, the data are close to standard average. Moreover, the low bio-carbonization rate at low temperature is due to some carbon is emitted, which takes more time to reach carbonization when the temperature is low. On the contrary, it takes less time to reach carbonization at high temperature because some carbon probably doesn't reach accomplisment.
According to the results analyzed by ANOVA shows that reactoin time has a significant influence on residual with obvious declination of residual. However, the different temperatures have no significant influence on residual; the residual of the branches is better than mixture and leaves and the residual of mixture is better than leaves under the conditions of different distribution proportion, which shows that the mix of material has a significant influence on residual. By making use of it to cope with campus yard waste, we can take it as our goal to employ the process which can obtaion the most amount of carbonization. As for the dsipose of campus yard waste, results obtained from the study has the feasibility of further reference.
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