摘要
以牛粪与番茄秸秆混合物为发酵原料,7 d为一个进出料周期,进行不同进料量100,120,140,160 g/L混合物料的中温(35±1)℃厌氧发酵产气试验,以考察进料量对农业废弃物半连续式厌氧发酵产气情况及消化稳定性的影响。结果表明,进料量为140 g/L时,甲烷平均含量相对较高,达49.06%,且其波动幅度较小;容积甲烷产率较高,达0.141 L/(L·d),较进料量为100,120,160 g/L处理分别高出131.15%,13.71%,2.17%。从料液p H值、VFA、碱度等系列指标可以得出,进料量为100,120,140 g/L时,系统均能稳定运行;当进料量提高到160 g/L时,系统酸累积现象明显,开始趋于不稳定。因此,从甲烷产量和系统的稳定性综合考虑,140 g/L为适宜的推荐进料量。
To investigate effects of feeding rate on biogas production and digestion stability of agriculture waste anaerobic fermentation, experiments with different feeding rate（100, 120, 140, 160 g/L every seven days）by semi-continues anaerobic fermentation at mesophilie temperature（35±1）℃ of cow manure and watermelon straw were carried for seven times of digestion materials feeding.The results showed that higher and smaller fluctuant methane content（49.06%）was achieved when feeding rate was 140 g/L, and it had a higher volume methane production（0.141 L/（L·d））which was 131.15%, 13.71%, 2.17%, higher than other treatment groups with feeding rate of 100, 120, 160 g/L, respectively. The results of p H, volatile fatty acid and alkalinity analysis demonstrated that the reactor operated stably when feeding rate was 100, 120, 140 g/L, but it tended unstable due to the accumulation of acid when feeding rate reached160 g/L. Based on comprehensive consideration of methane production and digestion stability, the optimum feeding rate was 140 g/L.
出处
《山西农业科学》
2016年第12期1822-1826,共5页
Journal of Shanxi Agricultural Sciences
基金
山西省重点研发计划(重点)项目(2016-MN-10-05)
山西省科技攻关项目(20150313003-5)
山西省农业科学院攻关项目(YGG1420)
山西省农业科学院科技自主创新能力提升工程项目(2016zzcx-27)
关键词
农业废弃物
进料量
半连续式厌氧发酵
产气性能
agriculture waste
feeding rate
semi-continues anaerobic fermentation
gas production characteristic
