应用TRIZ理论设计秸秆好氧-厌氧联合发酵工艺,并研究不同供气方式及加入菌剂对其发酵特性的影响。结果表明:经过好氧发酵后,各组的木质纤维素降解率均有不同程度的提高,曝气混菌组的木质纤维素降解率最高,半纤维素、纤维素和木质素的降解率分别为46.3%、40.4%和8.2%。利用修正的Gompertz方程和一级反应方程对累积产甲烷量的拟合结果较好,R2均大于0.97,曝气混菌组累积产甲烷量的试验值可达294.38 m L/g,利用两个方程拟合数值分别为279.58 m L/g和320.11 m L/g,而经巴斯维尔公式计算得到的理论产甲烷量为424.7 m L/g,曝气混菌组的试验值仅为理论产甲烷量的69%左右,仍有31%左右的物质没有被降解,因此巴斯维尔公式对惰性物质含量较高的物质理论计算结果偏高。好氧敞口组、曝气木酶组、曝气黑曲霉组、曝气混菌组及搅拌混菌组总挥发性固体降解率分别比直接厌氧发酵组高15.99%、35.47%、37.99%、54.68%和40.92%,曝气供氧方式的效果优于搅拌供氧,曝气供氧方式下添加混菌的效果优于添加单一菌种。
【英文摘要】
Anaerobic digestion is a promising technology by which crop straw can be biologically transformed into biogas. However,the efficiency of anaerobic digestion was significantly influenced by the complicated structural resistance from lignocellulose. Therefore,aerobic digestion was used to break down the structure of lignocellulose before anaerobic digestion process. The TRIZ theory was applied to design aerobic-anaerobic combined digestion process of rice straw,and the effects of different aeration modes and ...