| Summary: | 碩士 === 國立臺灣大學 === 生物產業機電工程學研究所 === 101 === Microbial fuel cell (MFCs) is a technology which possesses functions of pollution control and electricity production, with significant value in sustainability to our environment. The typical MFC consists of electrodes, reactor, aerator, substrate,mediator, proton exchange membrane (PEM) and inoculum. The configuration of MFC used in this study was an air-cathode, single-chambered MFC, in which carboncloth was used as electrode and to block the diffusion of oxygen with proper layout of electrodes, so that PEM was not applied in this study. Inoculum, the anaerobic sludge, was obtained from a swine wastewater treatment system. After boiling pretreatment, the sludge was entrapped with cellulose acetate. Besides synthetic wastewater, orange waste from juice shop was also used as substrate in this study. The purpose of this study is to find out the proper operational methods for using the food waste as the substrate of MFC and to evaluate its performance of electricity production.
Two groups of operational parameters were tested in this study: 1. with or without addition of graphite powder for immobilized cells, and 2. three different substrate compositions for reactor feeding (100% artificial wastewater, 50% artificial wastewater and 50% orange waste, 100% orange waste). Performance of electricity production at three different organic loading rates (4 g/L/d、15.44 g/L/d及42.75 g/L/d) of using orange waste as substrate were evaluated.
Experimental results showed at the operational condition: without addition of graphite powder in immobilized cells, pH 5, 4 g/L/d organic loading rate, 100% artificial wastewater as substrate, the system had the best performance. It was observed that 88.84
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