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为了探究湿地植物、电极间距对湿地型生物燃料产电及污水净化效能的影响,本文选用鸢尾、绿萝、富贵竹和观音竹4种湿地植物构建湿地型生物燃料电池与相同结构无种植湿地植物的燃料电池进行对照.结果表明,有植物的微生物燃料电池的产电性能优于无植物的微生物燃料电池;4种植物微生物燃料电池功率密度由高到低的顺序依次为:鸢尾>绿萝>富贵竹>观音竹.相同绿萝植物的湿地型微生物燃料电池在不同的电极间距下的产电性能不同,间距越小输出电压和功率密度越大.当电极距离为10 cm时,最大功率密度达2.55 W·m~(-3),比20 cm和30 cm分别高约30%和50%.4种湿地植物的湿地型微生物燃料电池对COD的去除率均达80%以上,COD去除效率由高到低的顺序依次为:鸢尾>富贵竹>观音竹>绿萝.
In order to explore the impact of wetland plants and electrode spacing on wetland biofuels electricity generation and wastewater purification efficiency, wetland-type biofuel cell was constructed by using four wetland plants, such as Iris, Radix et. Fuel cell.The results show that the plant-produced microbial fuel cell has better electricity generation performance than the plant-free microbial fuel cell.The order of power density of the four plant microbial fuel cells from high to low is iris> green plant> > Guanyinzhu.The wetland microbial fuel cells with the same green plant have different production performance at different electrode spacings, the smaller the output is, the larger the output voltage and power density are.When the electrode distance is 10 cm, the maximum power density reaches 2.55 W · M ~ (-3), respectively, about 30% and 50% higher than those of 20 cm and 30 cm, respectively. The removal rates of COD in wetland microbial fuel cells of all wetland plants reached more than 80%, and the COD removal efficiency increased from high The order of low is: iris> rich bamboo> a Buddism godness Guanyin bamboo> green radish.