【目的】随着社会经济发展,城市固体废弃物中餐厨垃圾占比增加。通过厌氧发酵制取生物甲烷是餐厨垃圾能源化利用的关键技术之一。针对厌氧发酵反应器长期运行不稳定、抗外界扰动能力较弱的问题,利用3D打印技术和柔性硅胶材料制作反刍仿生部件,并将其应用于连续搅拌罐式反应器中,以期改善反应器的运行性能。【方法】根据反应器中是否添加仿生部件设置实验组(Ruminant)和对照组(Control),通过调节有机负荷和试验温度等参数,探究仿生部件增强厌氧发酵产甲烷量及稳定性的影响作用。【结果】实验结果表明,在45℃的温度扰动中,仿生部件有效稳定了微生物群落结构,从而保证了反应器运行的稳定性。Ruminant组没有积累丁酸,pH维持在6.7~7.6,Ruminant组比CH4产量最高为217mL·g-1·L-1·d-1,比Control组高39%。

【Purposes】 With the development of social economy, the proportion of kitchen waste  in urban solid waste is increasing. Anaerobic fermentation to produce biomethane is one of the key  technologies for the energy utilization of kitchen waste. To address the long-term instability and weak  resistance to external disturbances of anaerobic fermentation reactors, 3D printing technology and flex‐ ible silicone materials were adopted to creat ruminant biomimetic components that can be applied in  continuous stirred-tank reactors to improve their operational performance. 【Methods】 Experimental  (Ruminant) and control (Control) groups were set up according to whether biomimetic components  were added to the reactor. By adjusting parameters such as organic load and test temperature, the ef‐ fects of biomimetic components on enhancing the production and stability of biomethane in anaerobic  fermentation were explored. 【Findings】 The results show that under a temperature disturbance of  45 ℃, the biomimetic components effectively stabilize the microbial community structure, thus ensur‐ ing the stability of the reactor operation. For Ruminant group, there is no accumulation of butyric  acid, and the pH can be maintained at 6.7-7.6. The highest methane production in the Ruminant  group is 217 mL·g ·L ·d , which is 39% higher than that in the Control group.