| Summary: | 碩士 === 國立臺灣大學 === 環境工程學研究所 === 85 === This study uses biofilter apparatus with auto-continuous
monitoring volatile organic compounds (VOCs) and auto-spraying
water functions, to simulate waste gases containing ethyl
acetate, toluene, and xylene. Experiments are divided into two
parts for different operations and purposes: 1.steady state
experiment-take well mixing compost, rice corn and sludge as
filter material, and continuously supply simulating waste gases
into the biofilter; 2.unsteady state experiment-take well mixing
compost, rice corn, sludge and activated carbon as filter
material, and non-continuously supply simulating waste gases
into the biofilter as the working style of factories production
processes. According to the experiment results, for steady
state experiment, the average efficiencies of total treatment
are 91.50%, 69.98% and 64.73%, also, the loading of filter bed
are 0.1594g/g filter material, 0.5342g/g filter material and
0.0584g/g filter material, for ethyl acetate, toluene, and
xylene, respectively. For unsteady state experiment, the
average efficiencies of total treatment are 76.77%, 51.77% and
70.06%, also, the loading of filter bed are 0.1724g/g filter
material, 0.0710g/g filter material and 0.1254g/g filter
material, for ethyl acetate, toluene, and xylene, respectively.
From the results above, it can be concluded that it is better to
treat ethyl acetate and toluene by steady state operation, and
also means activated carbon has less effect on the VOCs. In the
contrary, xylene has higher treatment efficiency by unsteady
state operation, and activated carbon has more effects on
xylene.
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