Bioaerosol Control Assessment：Combination of Photo Catalytic Oxidation and Negative Air Ions
Date Issued
2007
Date
2007
Author(s)
Lin, Szu-Ying
DOI
zh-TW
Abstract
Nowdays, people stay indoors most of time. This is especially ture for the residents in metropolitan. Therefore, the IAQ（Indoor Air Quality）has great impact on human health and comfortable life. Bioaerosols play an important role on IAQ.
The purpose of this research was to evaluate bioaerosols control technology by the combination of photocatalytic oxidation (PCO) and negative air ions (NAI). To investigate the difference of the results of using PCO and NAI to control different bioaerosols, this research chose λ vir, E. coli and C. famata as the experimental bioaerosols.
The results of this research show that the activity of λ vir and C. famata decreased in the lower relative humidity (RH) environment which is at 30% RH. But the effect of RH is not obvious to E. coli. In general, the enhanced efficiency in decreasing order is ηenhanced,NAI/PCO > ηenhanced,NAI > ηenhanced,PCO. The ηenhanced,NAI/PCO,λ vir is 34.2% when RH is 50% and 70%, which is the highest among all of the enhanced efficiency. However, there is no difference between ηenhanced,NAI/PCO and ηenhanced,NAI for both E. coli and Yeast.
The results from control efficiency show that the range of ηE. Coli is 30.7±5.0% and the effect of RH is not obvious. The range of ηλ vir is 68.0±16.6%, and ηλ vir increased with RH. The range of ηYeast is 49.2±16.2%, and ηYeast decreased with RH. The average of control efficiency in decreasing order is ηNAI/PCO/Filter > ηNAI/Filter > ηPCO/Filter. The optimum RH for control of the bioaerosols investigated in this study was found to be 50%.
Subjects
生物氣膠
光觸媒
空氣負離子
相對濕度
Bioaerosol
PCO
NAI
Relative humidity
Type
thesis
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