@article{Phuong_Viet_Duong_Loc_2023, title={Feasibility of mango by-products and biogas solid residue aerobic co-composting at different C/N ratios}, volume={13}, url={https://oiccpress.com/international-journal-of-recycling-of-organic-waste-in-agriculture/article/feasibility-of-mango-by-products-and-biogas-solid-residue-aerobic-co-composting-at-different-c-n-ratios/}, DOI={10.57647/j.ijrowa.2024.1301.02}, abstractNote={Purpose: Co-composting of mango by-products and biogas solid residue eliminates some shortcomings of composting these wastes separately. Specifically, co-composing solves the problem of the low pH values in mango by-products while enhances biodegradable organic matter of biogas solid residues. However, no research report is available on co-composting of mango by-products (MB) and biogas solid residue (BR). Method: This study established three in-vessel lab-scale composting bins with 3 different C/N ratios, including Bin 1: 27.4/1 (156 kg MB + 144 kg BR); Bin 2: 30.23/1 (193 kg MB + 107 kg BR); and Bin 3: 37.7/1 (224 kg MB + 76 kg BR). The raw compost materials underwent 57 days of incubation, including 36 days of raw incubation and 21 days of mineralization. Results: Bin 3 containing larger amounts of mango by-products and less amounts of biogas residue showed a higher percentage of remaining carbon in the final products (17.97%), lower nitrogen loss (17%), and showed 0.5% increase in available P2O5 content, compared to the other bins. From 300 kg of initial raw material, the final compost mass in Bin 1, Bin 2, and Bin 3 were 26.2 kg, 32.7 kg, and 88.1 kg, respectively. Conclusion: Resultantly, an initial C/N ratio of 37.7/1 could be suggested in the aerobic co-composting of biogas residue with mango by-products.   Research Highlights ·       Co-composting of mango by-products and biogas solid residue eliminates some of the weaknesses of composting these wastes separately. ·       The incubation period determined was 57 days of incubation, including 36 days of raw incubation and 21 days of mineralization. ·       Among three C/N ratios surveyed, the highest C/N in bin 3 (C/N=37.7/1) showed the best-favoured condition for mango by-products treatment and generate the highest amount of compost product. ·       Bin 3 showed the highest percentage of remaining carbon in compost products (17.97%), a lower in nitrogen loss (17%), and 0.5% increase in available P2O5 content.  }, number={1}, journal={International Journal of Recycling of Organic Waste in Agriculture}, publisher={OICC Press}, author={Phuong, Do Thi My and Viet, Le Hoang and Duong, Nguyen Thuy and Loc, Nguyen Xuan}, year={2023}, month={Nov.}, keywords={Biogas solid residue, C/N ratio, Co-composting, Humus, Mango byproducts} }