Co-digestion approach for enhancement of biogas production by mixture of untreated napier grass and industrial hydrolyzed food waste

Jayen Aris Kriswantoro; Kuan-Yin Pan; Chen-Yeon Chu

doi:10.3389/fbioe.2023.1269727

Co-digestion approach for enhancement of biogas production by mixture of untreated napier grass and industrial hydrolyzed food waste

Front Bioeng Biotechnol. 2024 Jan 8:11:1269727. doi: 10.3389/fbioe.2023.1269727. eCollection 2023.

Authors

Jayen Aris Kriswantoro^{1

2

3}, Kuan-Yin Pan^{2

4}, Chen-Yeon Chu^{1

2

5}

Affiliations

¹ Ph.D. Program of Mechanical and Aeronautical Engineering, Feng Chia University, Taichung, Taiwan.
² Institute of Green Products, Feng Chia University, Taichung, Taiwan.
³ School of Life Sciences and Technology, Bandung Institute of Technology, Bandung, Indonesia.
⁴ Department of Materials Science and Engineering, College of Engineering and Science, Feng Chia University, Taichung, Taiwan.
⁵ National Research Council of Italy, Institute of Atmospheric Pollution Research, Rome, Italy.

Abstract

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_added/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_added after 60 days of digestion. This was followed by the data on methane yield and concentration were 614.37 mL/g VS_added 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.

Keywords: anaerobic digestion; biogas; co-digestion; food waste; napier grass.

Grants and funding

The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This research was financially supported by the National Science and Technology Council, Taiwan (grant numbers: NSTC 111-2221-E-035-040-MY3 and 112-2927-I-035-501).