Enhancement of Gaseous Ethyl Acetate Removal and Electricity Generation by Installing Small Test-Tube Microbial Fuel Cells into Biotrickling Filter Microbial Fuel Cell

• Main Author: 傅思華
• Other Authors: LIN,CHI-WEN
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/7m2c8g

碩士 === 國立雲林科技大學 === 環境與安全衛生工程系 === 105 === Ethyl acetate (EA), a flammable volatile organic compound, often used as an activator in the paint industry. Long-term exposure to EA poses a risk to human health. In this study, air-cathode microbial fuel cells (AC-MFCs) were prepared using polyvinyl alcohol hydrogel (PVA-H) and a porous conductive ceramic ring (PCCR). They were then integrated into a biotrickling filter-microbial fuel cell (BTF-MFC) system. This tube-type BTF-MFC system was found to significantly increase voltage output. The results of this research show that: 1) Tube-type AC-MFCs can be kept moist to enable multiple cells within a single cell body by generating progressive flow through a circulating water spray. This improves the overall voltage output; 2) The time required for waste gas treatment can be reduced and the performance of electricity generation enhanced, through the use of the unique structural characteristics of tube-type AC-MFCs; 3) The maximum power density of tube-type AC-MFCs is about ten times higher than that of tube-type BTF-MFCs; and 4) The EA removal efficiency of tube-type BTF-MFCs can reach 92.99%, with an EA waste gas concentration of 400 ppmv, and an empty bed retention time (EBRT) of 40 s. If a closed-circuit configuration with a resistance of 1 kΩ between the anode and cathode is used, this corresponds to a maximum open-circuit voltage of 931 mV. Overall, embedding tube-type AC-MFCs into a BTF-MFC system can successfully enhance the removal efficiency of EA and the output voltage.