생활폐수 내 혼합균주를 이용한 미생물 연료전지의 구동 특성에 관한 연구

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 32; no. 6; pp. 506 - 513
• Main Authors: 김상규(SANG KYU KIM), 유동진(DONG JIN YOO)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2021
• Subjects: 기계공학; Hydrogen ion(수소이온); Wastewater(폐수); E. coli K12 (대장균 K12); Mixed strains(혼합균주); Microbial fuel cell(미생물 연료전지); K12
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/KHNES.2021.32.6.506

The use of fossil fuels is a major contributor to the increase atmospheric greenhouse gas emissions. As such problems arise, interest in new and renewable energy devices, particularly fuel cells, is greatly increasing. In this study, various characteristics of mixed strains were observed in wastewater collected by the Jeonju Environment Office to investigate the effects of microorganisms on voltage generation and voltage generation of substrates, electrode materials, electrons, electron transport media, and ash microbial fuel cells. As a result of separately measuring the voltage generated during inoculation, the inoculation voltage of Escherichia coli K12 (E. coli K12) was 0.45 V, and the maximum inoculation voltage of the mixed strain was 1.2 V. Thereafter, voltage values were collected using a digital multimeter and the amount of voltage generated over time was measured. In the case of E. coli K12, the maximum voltage reached 0.45 V, and the cell voltage was maintained above 0.23 V for 140 hours. In contrast, for the mixed strain, the maximum voltage reached 1.2 V and the voltage was slowly decreased to 0.97 V. In addition, the degree of microbial adsorption to the electrod surface after the inoculation test was confirmed using a scanning electron microscope. Therefore, these results showed the possibility of purifying pollutants at the same time as power generation through the production of hydrogen ions using microorganisms and wastewater.