School of Materials Science & Engineering, Shandong University, Jinan, 250061, China.
Jinan Gold Phoenix Brake Systems Co. Ltd., Jinan, 251400, China.
Appl Biochem Biotechnol. 2021 Feb;193(2):479-491. doi: 10.1007/s12010-020-03436-1. Epub 2020 Oct 6.
To improve the production rate of methane, powder-activated carbon (PAC), granule activated carbon (GAC), titanium dioxide-anatase (TiO), and synthesized zeolite (permutit) were added in the co-digestion process. The co-substrates were corn stover (CS) and pig manure (PM) mixed in the ratio of 1:2 (w/w). The kinetic analysis model and ADM1da model were applied to obtain the kinetic parameters of the process. Besides, the heat flow analysis of the co-digestion process was determined using isothermal microcalorimetry. The addition of the PAC, GAC, TiO, and synthesized zeolite improved the methane cumulative yield by 40.12, 31.25, 31.17, and 43.74% respectively, as compared with the control reactor. The kinetic analysis and ADM1da model results indicated that the overall rate constant of the co-digestion process increased by 1.5 times averagely because of the effect of these materials. It was also observed that much higher heat energy released from the experimental sample compared with the control reactor, which indicated that the improvement of the metabolic process of the AcoD system. The addition of TiO-anatase improved methane production by 31.17%, which could be a promising method to improve the biomethane in a large-scale due to its availability and accessibility.
为了提高甲烷的产率，在共消化过程中添加了粉末活性炭（PAC）、颗粒活性炭（GAC）、锐钛矿型二氧化钛（TiO）和合成沸石（丝光沸石）。共底物为玉米秸秆（CS）和猪粪（PM），按 1:2（w/w）的比例混合。应用动力学分析模型和 ADM1da 模型获得过程的动力学参数。此外，使用等温微量热法确定共消化过程的热流分析。与对照反应器相比，PAC、GAC、TiO 和合成沸石的添加分别将甲烷累积产率提高了 40.12%、31.25%、31.17%和 43.74%。动力学分析和 ADM1da 模型结果表明，由于这些材料的作用，共消化过程的总速率常数平均提高了 1.5 倍。还观察到实验样品释放的热能明显高于对照反应器，这表明 AcoD 系统的代谢过程得到了改善。锐钛矿型二氧化钛的添加使甲烷产量提高了 31.17%，由于其可用性和可及性，这可能是一种提高大规模生物甲烷产量的有前途的方法。
