摘要
采用逐渐提高有机负荷的半连续进料方式,研究中温(35℃)条件下餐厨垃圾与猪粪混合厌氧消化规律和性能,并利用一级和准二级动力学模型对其试验结果进行动力学分析。研究表明,在0.5和0.75 gVS/(L.d)有机负荷条件下,厌氧消化系统产酸到产甲烷阶段微生物的消长与生化反应均能达到动态平衡。当有机负荷为0.75 gVS/(L.d)时,厌氧消化性能达到最佳,系统出现最大单位原料产气率和最大平均甲烷含量,分别为0.78 L/gVS和51%。对试验进行动力学分析,发现一级动力学模型标准偏差值r2=0.970 0,大于准二级动力学模型的标准偏差值0.935 5。这说明一级反应动力学模型能较好地反映0.75 gVS/(L.d)负荷下的产气动力学过程。
The anaerobic co-digestion of kitchen waste and pig waste was conducted in a semi-continuous mode at 35 ℃ by gradually increasing organic loading rate（OLR）.The result was studied by using the first-level and second-level kinetic models.The digestion experiment showed that the process from producing of the organic acid to the methanogenic phase could be reached a dynamic equilibrium by OLR of 0.5 gVS/（L·d） and 0.75 gVS/（L·d）.The maximum value of biogas yield and the average CH4 content under OLR of 0.75 gVS/（L·d） were about 0.78 L/gVS and 51%,respectively.The kinetic analysis showed that the standard deviation value about 0.970 0 of the first-level kinetic model was greater than that about 0.935 5 of the second-level,which could be better described the kinetic process of the gas production.
出处
《安徽农业科学》
CAS
北大核心
2011年第20期12278-12280,12338,共4页
Journal of Anhui Agricultural Sciences
关键词
混合厌氧消化
半连续
餐厨垃圾
猪粪
动力学
Anaerobic co-digestion
Semi-continuous
Kitchen waste
Pig waste
Kinetic model
