Abstract
Municipal solid waste contains mainly organic wastes that can be a good source for anaerobic digestion. Solid-state anaerobic digestion is an affordable and suitable technique to mitigate the organic fraction of municipal solid waste (OFMSW). However, as the organic loading of OFMSW is high, co-digestion with other materials can improve the system's performance. This study aimed to investigate the performance of the co-digestion of OFMSW and sawdust and study the parameters affecting its performance. Based on the experiments, the optimum sawdust/OFMSW ratio was achieved 1:2 with the methane production of 0.3 L/g VS. In addition, the inoculum-to-substrate ration (I/S) was investigated at 1:4, 1:2, 1:1, 2:1 ratios. The best result was obtained at 2:1 ratio with a total methane yield of 0.28 L/g VS. The results also indicated that I/S ratios less than 1:1 led to fatty acid accumulation and acidic pH condition. The effect of total solids content on the co-digestion process was also examined in this study. According to the results, as the total solids increased, the biomethane yield decreased while the biogas content increased.
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The authors would like to acknowledge the Tarbiat Modares University, faculty of civil and environmental engineering to fund this project.
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This research was funded by Tarbiat Modares University for master thesis.
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Conceptualization: FZ, NM; Methodology: FZ; Formal analysis and investigation: FZ; Writing—original draft preparation: KPN; Writing—review and editing: KPN; Supervision: NM.
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Ziaee, F., Mokhtarani, N. & Pourrostami Niavol, K. Solid-state anaerobic co-digestion of organic fraction of municipal waste and sawdust: impact of co-digestion ratio, inoculum-to-substrate ratio, and total solids. Biodegradation 32, 299–312 (2021). https://doi.org/10.1007/s10532-021-09937-y
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DOI: https://doi.org/10.1007/s10532-021-09937-y