Kriswantoro Jayen Aris, Pan Kuan-Yin, Chu Chen-Yeon
Ph.D. Program of Mechanical and Aeronautical Engineering, Feng Chia University, Taichung, Taiwan.
Institute of Green Products, Feng Chia University, Taichung, Taiwan.
Front Bioeng Biotechnol. 2024 Jan 8;11:1269727. doi: 10.3389/fbioe.2023.1269727. eCollection 2023.
The co-digestion of untreated Napier grass (NG) and industrial hydrolyzed food waste (FW) was carried out in the batch reactor to investigate the effect of substrate ratios on biogas production performance. Two-stage anaerobic digestion was performed with an initial substrate concentration of 5 g VS/L and a Food to Microorganism Ratio (F/M) of 0.84. The 1:1 ratio of the NG and FW showed the optimum performances on biogas production yield with a value of 1,161.33 mL/g VS after 60 days of digestion. This was followed by the data on methane yield and concentration were 614.37 mL/g VS and 67.29%, respectively. The results were similar to the simulation results using a modified Gompertz model, which had a higher potential methane production and maximum production rate, as well as a shorter lag phase and a coefficient of determination of 0.9945. These findings indicated that the co-digestion of Napier grass and hydrolyzed food waste can enhance biogas production in two-stage anaerobic digestion.
在间歇式反应器中对未经处理的象草（NG）和工业水解食品废弃物（FW）进行共消化，以研究底物比例对沼气生产性能的影响。进行了两阶段厌氧消化，初始底物浓度为5 g VS/L，食物与微生物比（F/M）为0.84。象草和食品废弃物1:1的比例在消化60天后，沼气产量表现最佳，为1,161.33 mL/g VS。其次，甲烷产量和浓度的数据分别为614.37 mL/g VS和67.29%。结果与使用修正的Gompertz模型的模拟结果相似，该模型具有更高的潜在甲烷产量和最大生产率，以及更短的滞后期和决定系数0.9945。这些发现表明，象草和水解食品废弃物的共消化可以提高两阶段厌氧消化中的沼气产量。
