论文部分内容阅读
随着能源短缺和环境污染等问题的日益严重,农业废弃物资源化利用引起了广泛关注。为了从牛粪等农业生产废弃物中获取新能源,减少农业固体废物对环境的污染,研究了含固率和电极间距对牛粪发酵产电性能的影响,分析了产电过程中电压、电流、功率密度、挥发性脂肪酸VFA和COD等指标的变化规律。结果表明,含固率对牛粪发酵产电性能影响较大,电极间距影响较小。在碳氮比(C/N比)为18,含固率为1%,电极间距为2.5 cm时,产生的电压最高可达0.79 V,电流最高可达0.58 m A,功率密度幅值高达398 m W/m2,发酵产电结束后VFA增加了250%,COD去除率超过了80%。
With the increasing shortage of energy and environmental pollution, the utilization of agricultural waste has drawn wide attention. In order to obtain new energy from agricultural production wastes such as cow dung and reduce the environmental pollution caused by agricultural solid wastes, the influence of solid content and electrode spacing on the electricity production performance of cow dung was studied. The effects of voltage and current , Power density, volatile fatty acids VFA and COD and other indicators of changes. The results show that the solid content has a great influence on the electricity production performance of cow dung fermentation and the effect of electrode spacing is small. With a C / N ratio of 18, a solid content of 1%, and an electrode spacing of 2.5 cm, the resulting voltage can reach up to 0.79 V, with a current up to 0.58 mA and a power density amplitude of up to 398 m W / m2. The VFA increased by 250% after the end of fermentation and the COD removal rate exceeded 80%.