J. Mech. Cont.& Math. Sci., Special Issue, No.-9, May (2020) pp 201-208 Copyright reserved © J. Mech. Cont.& Math. Sci. Toshihiro Ozawa et al 201 PERFORMANCE OF A CHAMBER-LESS MICROBIAL FUEL CELL WITH A PAPER-BASED MEMBRANE COATED BY VASELINE Toshihiro Ozawa 1 , Dang Trang Nguyen 2 , Kozo Taguchi 3 1,2,3 Department of Electrical and Electronic Engineering, Ritsumeikan University, Kusatsu, Shiga, Japan Email: wp.toot.13x@gmail.com https://doi.org/10.26782/jmcms.spl.9/2020.05.00020 Abstract Today, energy production problem is seriously in the world. Wastes is one of the renewable energy resources, it is converted to electrical energy by Microbial Fuel Cells (MFC). In this study, a chamber-less MFC was constructed by some acrylic parts, electrodes and a filter paper-based proton exchange membrane (PEM). Bacillus subtilis was incubated and fixed on activated carbon sheet. To replace chemically treated PEM, Vaseline was used to treat the paper-based PEM. To increase the output, multiwall carbon nanotube (MWCNT) liquid was used to glue the cathodic electrode and filter paper-based PEM. Current density and power density were measured. Maximum current density and power density were 55/ ଶ and 3.86 / ଶ , respectively. Internal resistance of MFC was estimated between 5kΩ and 10kΩ based on the polarization curve. Vaseline-treated paper-based membrane and MWCNT gluing method had positive effectiveness on the performance of the chamber-less MFC. Keywords: Microbial Fuel Cell, The chamber-less MFC, Vaseline, Multi Wall Carbon Nano Tube, Bacillus subtilis I. Introduction Nowadays, energy crisis has gone to a seriously situation due to depletion of fuel fossil, a population explosion the environmental disruption and so on. So, renewable energy resources are believed the effective solution for these problems. These resources have characteristics of recyclable and environmentally friendly. Therefore, these resources are going to be used as the main energy taken the place of fuel fossil in the future [VIII]. MFC is one of the renewable energies to generate electric power from chemical energy in the organic matters decomposed by microorganism. MFC has a potential for a generation of a huge electric power supporting human life [XVII]. Two main constructions of MFC are used for generating electric power. One type is double-chamber MFC, which has two chambers separated by a membrane and be JOURNAL OF MECHANICS OF CONTINUA AND MATHEMATICAL SCIENCES www.journalimcms.org ISSN (Online) : 2454 -7190 , Special Issue, No.-9, May (2020) pp 201-208 ISSN (Print) 0973-8975 Conference on “Emerging Trends in Applied Science, Engineering and Technology” Organized by MDSG Research Group, Malaysia