Anaerobic digestion of sewage sludge generally produces an amount of biogas that is not enough to cover the energy requirements of the digester. One possibility to increase the biogas production is to co-digest, together with sewage sludge, other substrates, for istance the organic fraction of municipal solid waste. Alternatively, a preliminary step of dark co-fermentation of those mixed substrates can be applied. In this work, such possible cases are compared by Life Cycle Assessment approach. The study was carried out with reference to the Viareggio wastewater treatment plant, Italy. Anaerobic co-digestion of sewage sludge and the organic fraction of municipal solid waste emerges as the best treatment option in terms of environmental impacts. However, also dark co-fermentation presents, albeit less, benefits and a reduction in environmental burdens. The robustness of the results is explored by the sensitivity analysis with respect to the effective thermal energy use.

Bioenergy recovery from waste: comparison of different treatment scenarios by LCA / Elena Albini; Donata Bacchi, Giovanni Ferrara, Giovanni Francini, Giovanni galoppi, Lidia Lombardi, Isabella Pecorini, Caterina Susini. - In: ENERGY PROCEDIA. - ISSN 1876-6102. - STAMPA. - 148:(2018), pp. 34-41. [https://doi.org/10.1016/j.egypro.2018.08.016]

Bioenergy recovery from waste: comparison of different treatment scenarios by LCA

Elena Albini;Donata Bacchi;Giovanni Ferrara;Giovanni Francini;Giovanni galoppi;Lidia Lombardi;Isabella Pecorini;Caterina Susini
2018

Abstract

Anaerobic digestion of sewage sludge generally produces an amount of biogas that is not enough to cover the energy requirements of the digester. One possibility to increase the biogas production is to co-digest, together with sewage sludge, other substrates, for istance the organic fraction of municipal solid waste. Alternatively, a preliminary step of dark co-fermentation of those mixed substrates can be applied. In this work, such possible cases are compared by Life Cycle Assessment approach. The study was carried out with reference to the Viareggio wastewater treatment plant, Italy. Anaerobic co-digestion of sewage sludge and the organic fraction of municipal solid waste emerges as the best treatment option in terms of environmental impacts. However, also dark co-fermentation presents, albeit less, benefits and a reduction in environmental burdens. The robustness of the results is explored by the sensitivity analysis with respect to the effective thermal energy use.
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34
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Elena Albini; Donata Bacchi, Giovanni Ferrara, Giovanni Francini, Giovanni galoppi, Lidia Lombardi, Isabella Pecorini, Caterina Susini
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/1177275
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