| Summary: | 碩士 === 東海大學 === 環境科學與工程學系 === 106 === The main purpose of this study is to improve the electricity production performance of anaerobic microbial fuel cells and the use of the metabolism of electroactive microorganisms to remove the organic pollutants in the target wastewater, and to reduce the concentration of ammonia nitrogen in the wastewater through assimilation. The polymerase chain reaction found that the anaerobic sludge without enrichment culture, the aerobic sludge enriched for 6 months, and the anaerobic sludge enriched for 6 months all had the target electroactive bacteria Geobacter sp. The anaerobic sludge has better electricity production performance than the aerobic sludge in MFC. Significant factor screening experiment affecting the growth of electroactive bacteria. The main effect of the factor on COD removal rate is from glucose concentration > pH value > acetate concentration > ammonia concentration > phosphate concentration > activated carbon > EDTA concentration > Na2CO3 concentration. The FTIR results show that the nitric acid- high current treated electrode has a significant nitrile peak, which makes the surface of the electrode negatively charged and increases the polarity of the electrode surface. Comparing the NH electrode with the untreated electrode MFC start-up experiment, it was found that the NH electrode shortened the start-up time by 40 hours and reached the stage of stable power generation in 80 hours. Considering the effect of electrode modification, the optimized power density of 369.8 mW / m2 using NH electrode MFC improves the efficiency of MFC power density by 150% compared with the untreated electrode power density of 147.9 mW / m2. The NH electrode can increase the COD volumetric load efficiency by about 85%, the ammonia volumetric load efficiency by about 8%, and the MFC-treated outflow water COD concentration can be less than 50 mg / L, which is lower than the current discharge standard of the Environmental Protection Agency. The 150 mg / L COD project shows that anaerobic MFC has the potential to replace aerobic biological systems that require high-intensity aeration. Comparative study also using fractional factorial experiment and Taguchi method variables separation mode of prediction and experimental results of confirmation experiment, showed a difference of about 15% of the relative percentage error therebetween.
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