蔬菜废物两步批式厌氧消化产气实验研究

采用两步批式的厌氧消化方式，先将蔬菜废物加水在反应器中酸化处理若干天，达到稳定后再将酸液分离出来，在厌氧消化体系稳定运行之后再将酸液分次加入反应器中，实现了易酸化废物单相厌氧消化系统的稳定运行。油菜和油麦菜在60和80g/L有机负荷率下的单位体积日平均产气量分别提高至0.24、0.23、0.21和0.28L/(d·L)。其中以油菜的厌氧消化性能提高最为显著，厌氧消化体系运行时间由常规批式的10d左右延长到了58d，在60和80.g/L的有机负荷率下的总产气量分别达到了20.86和20.42L，约为对照的9倍；单位总固体产气量也由23.1mL/g上升至231.7和226.8mL/g；最高甲烷体积分数达70.7%和83.9%。

Two-step batch anaerobic biogasification of vegetable wastes

Two step batch technology has been used to produce biogas by anaerobic digestion of cole and lettuce wastes. Two loading rates of 60 and 80g/L and a mesophilic temperature of 35℃ were used. The wastes were first acidified and the liquid then separated prior to biogasification. The average daily biogas yields fromcole wastes with loadings of 60 and 80g/L were 360mL/d and 352mL/d, respectively; the