Comparative analysis of the synergistic potential of the co-digestion of sewage sludge with different animal manures in biogas production
DOI:
https://doi.org/10.21142/SS-0701-2026-e136Keywords:
Sewage sludge, co-digestion, C/N ratio, substrates, methaneAbstract
Pollution from the accumulation and inadequate treatment of waste with a high organic load is a growing problem in the current context, due to its continuous generation through production activities and urban expansion. It is in this context that we present a promising valorization alternative known as anaerobic co-digestion, for the production of biogas as an energy source from various forms of organic waste. For this purpose, sewage sludge and animal manure, two forms of waste with high energy recovery potential, were considered. In this article, we evaluate the synergistic potential of co-digestion, while also comparing its impact on biogas production efficiency and optimal operating conditions. Our review is structured around four thematic areas, enabling us to address the composition of the substrates, the mixing ratio, the operating conditions and pretreatments, all of which affect the performance of the process. Furthermore, we applied the PRISMA methodology for the systematic selection of 32 scientific articles. Co-digestion potential was found to vary according to the C/N ratio of the manure type and its proportion with the sludge. Key factors included temperature control (mesophilic), the type of biodigester and pretreatments, with maximum reported values under optimal conditions of up to 1392.9 mL CH₄/g VS. Anaerobic co-digestion of sludge with manure, particularly poultry manure, was found to demonstrate high synergistic potential under optimized conditions, marking it out as a key potential strategy for sustainable energy production; however, standardized measurement methods will be required to ensure greater accuracy.
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Copyright (c) 2026 Carlos Alfonso Sánchez González, Sebastián Jostin Fernández Otiniano, Julio Manuel Vargas Mendiola

This work is licensed under a Creative Commons Attribution 4.0 International License.








