【摘要】 文章对鸡粪和餐厨垃圾中温厌氧发酵的产气特性和产甲烷动力学进行研究。鸡粪和餐厨垃圾按照混合比例（以VS计）为2∶1,1∶1和1∶2进行发酵,以鸡粪单独发酵和餐厨垃圾单独发酵为对照试验,底物浓度为15 gVS·L^-1。结果表明:鸡粪较少时（鸡粪与餐厨垃圾之比为0∶1,1∶2和1∶1）出现酸化,产甲烷的延迟期较长。甲烷产率和有机物去除率均随餐厨垃圾占比的增加而增大,餐厨垃圾单独发酵时最高,为254.4 mL·g^-1VS和54%。利用修正的Gompertz方程和一级动力学模型进行累积甲烷产量的动力学拟合,发现当鸡粪和餐厨垃圾的混合比例为2∶1时,获得最高的最大产甲烷速率3.65 mL·h^-1和转化速率常数0.4608 d^-1,说明该混合比例下,产甲烷的代谢活性较高。更多还原

【Abstract】 This article investigated the characteristics and kinetics of methane production in co-digestion of chicken manure and food waste under mesophilic condition. The mixing ratios of chicken manure and food waste based on volatile solid（VS） were 2∶1, 1∶1 and 1∶2, and the control experiments were also performed with sole chicken manure or sole food waste as substrate. The substrate concentration was 15 gVS·L^-1 for the all the treatments. Results showed that, when chicken manure was less（the ratio of chicken manure to food waste were 0∶1, 1∶2 and 1∶1）, acidification occurred, and methane production delayed longer. When the ratios of food waste were higher than chicken manure, both the methane yield and the organic removal rate increased with the increase of food waste, and the sole food waste obtained the highest methane yield and organic removal rate of 254.4 mL·g^-1VS and 54%, respectively. Kinetics fitting of accumulative methane production was conducted according to modified Gompertz equation and first-order kinetic model. It was found that when the mixing ratio of chicken manure and food waste was 2∶1, the highest methane production rate of 3.65 mL·h^-1 and the convention constant of 0.4608 d^-1 were obtained, indicating that the methanogenic metabolic activity was higher under this mixing ratio.更多还原