Special Issue “Anaerobic Digestion of Organic Waste: State of the Art and Future Perspectives and Challenges”
El Profesor Dr. Xavier Flotats, Miembro de Honor de AEBIG, invita a participar en el Special Issue on “Anaerobic Digestion of Organic Waste: State of the Art and Future Perspectives and Challenges”, Energies Journal, del que es coordinador:
We invite submissions to a Special Issue of the journal Energies on the topic of Anaerobic Digestion of Organic Waste: State of the Art and Future Perspectives and Challenges.
Anaerobic digestion has proven to be a key process in any sustainable technological strategy applied to organic waste management, transforming organic matter to valuable intermediates, which can be recovered, and finally to biogas, which can be used for the production of heat and electricity or upgraded to biomethane. Biomethane can be injected to the natural gas grid, allowing storage, distribution, and consumption where users can obtain maximum benefit. In the context of renewable gas/electrical grid integration, anaerobic digestion could play a role as a biological process for the transformation to biomethane of syngas, from thermal gasification, and hydrogen, from renewable electricity, thus taking advantage of the gas grid storage capacity and providing flexibility to the energy system. Additionally, anaerobic digestion enhances all the nutrients recovering processes owing to mineralization.
Current policies favor biogas production as an energy source, as biomethane or electricity. The potential of anaerobic digestion, however, exceeds the recovery of energy, and the focus on biogas as a single main product should be diversified towards creating multiple products, which could be beneficial for a complete development of the bio-based circular economy paradigm. The overall economy, however, depends on the scale of facilities and of raw substrates or digestate management costs, limiting applicability in many cases.
For this Special Issue, we would like to encourage original contributions and reviews regarding new perspectives of anaerobic digestion, overcoming the simple vision of biogas for energy, and facing future challenges in a context without subsidies or feed-in-tariff schemes. Potential topics include: economic analysis, role of anaerobic digestion in an integrated production of chemicals and energy (biorefineries), optimization when combining with other processes for chemical or fertilizer recovery, anaerobic processes for syngas and/or hydrogen conversion to biomethane, gas/electrical grids integration, business models optimizing integral organic waste management, and, in general, the role of anaerobic digestion in a circular economy.
Prof. Dr. Xavier Flotats
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