【摘要】 研究光照强度对猪粪、牛粪厌氧发酵的影响,为沼气池的改进、提高产气量提供参考。试验以猪粪、牛粪为发酵原料,设置0、6、12、24h4组光照梯度处理,在恒温35℃和料液总固体质量分数为8%的条件下进行厌氧发酵。结果显示,不同光照强度下同一发酵原料的产气量差别较大,猪粪、牛粪在12h光照条件下的累积产气量分别是0h光照条件下的(黑暗)1.80、2.34倍;相同的光照强度不同发酵原料产气量存在差别,0h光照条件下(黑暗)猪粪的累积产气量为8136mL,牛粪的累积产气量为3282.5mL;光照条件改变发酵料液的理化性质,使累积产气量与发酵料液的碱度、挥发性脂肪酸(Volatile fatty acids,VFA)、pH值、氨态氮的相关性呈动态变化。更多还原

【Abstract】 The purpose of research on effect of illumination intensity on pig manure and cow dung′ anaerobic fermentation is to provide theoretical basis for improving biogas yield and promoting innovation of biogas digester. The experiment, under 35 ℃, at 8% of total solid concentration of digestion material, with pig manure and cow dung as digestion material, was completed at different illumination intensity which rang was from 0 to 24 hours and with a gradient of 6 hours. Results indicated that there was a great deal difference in terms of the same fermentation materials′ gas production under the different illumination intensity. Pig manure and cow dung′ cumulative biogas yield, under 12 hours of light condition, were 1.80 and 2.34 times respectively as much as that of under dark condition. In addition, gas production of different fermentation material, at the same illumination intensity, was different. In the dark conditions, the cumulative gas production of pig manure was 8 136 mL, which was far much than that of cow dung, at 3 282.5 mL. Illumination conditions changed the physical and chemical characteristics of fermentation material, which led to the dynamic of relationship among cumulative biogas yield and total alkalinity, volatile fatty acids, pH, NH3-N.更多还原