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Fostering the valorization of organic wastes into carboxylates by a computer-aided design tool

(2022) WASTE MANAGEMENT. 142. p.101-110
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Abstract
The carboxylate platform has the potential to constitute an outstanding opportunity for converting organic wastes into chemicals and other value-added products within a circular economy framework. However, its development is still hampered by technological and financial constraints due to difficulties at forecasting the carboxylates yields by different wastes. This work provides a framework that can be the key to foster circular economy and bridge the development risks, allowing early-stage evaluation of process performance. This framework, which is implemented as a computer-aided design tool, is comprised by: (i) a library of substrates including their characterization and appropriate kinetic parameter selection, (ii) an integral kinetic and stoichiometric model which solves both identified gaps regarding the disintegration mechanisms and the acidogenic stoichiometry variability in the anaerobic mono and cofermentation of complex organic wastes, and (iii) a set of indicators to interpret simulation results and assist the decision making; and presents a showcase of applications supported by two case studies. These case studies show that the optimal conditions to steer VFA spectrum towards odd-chain VFA in MCF of regrind pasta are neutral pH (6.5-7) and a relatively low HRT (3-4 days), while cofermentation of tuna canning wastewater and regrind pasta follows interactive mechanisms that cannot be captured by a "naive approach", i.e. by adding up the individual contributions. Finally, it is discussed how value chain actors with different interests can benefit from the proposed tool: identifying technical, economic, and environmental bottlenecks, and proposing innovative solutions prior to costly lab research and piloting.
Keywords
Early-stage design, Aided decision making, Resource recovery, VFA production, Mathematical modelling, VOLATILE FATTY-ACIDS, FOOD WASTE, ACIDOGENIC FERMENTATION

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MLA
Saavedra del Oso, Mateo, et al. “Fostering the Valorization of Organic Wastes into Carboxylates by a Computer-Aided Design Tool.” WASTE MANAGEMENT, vol. 142, 2022, pp. 101–10, doi:10.1016/j.wasman.2022.02.008.
APA
Saavedra del Oso, M., Regueira López, A., Hospido, A., & Mauricio-Iglesias, M. (2022). Fostering the valorization of organic wastes into carboxylates by a computer-aided design tool. WASTE MANAGEMENT, 142, 101–110. https://doi.org/10.1016/j.wasman.2022.02.008
Chicago author-date
Saavedra del Oso, Mateo, Alberte Regueira López, Almudena Hospido, and Miguel Mauricio-Iglesias. 2022. “Fostering the Valorization of Organic Wastes into Carboxylates by a Computer-Aided Design Tool.” WASTE MANAGEMENT 142: 101–10. https://doi.org/10.1016/j.wasman.2022.02.008.
Chicago author-date (all authors)
Saavedra del Oso, Mateo, Alberte Regueira López, Almudena Hospido, and Miguel Mauricio-Iglesias. 2022. “Fostering the Valorization of Organic Wastes into Carboxylates by a Computer-Aided Design Tool.” WASTE MANAGEMENT 142: 101–110. doi:10.1016/j.wasman.2022.02.008.
Vancouver
1.
Saavedra del Oso M, Regueira López A, Hospido A, Mauricio-Iglesias M. Fostering the valorization of organic wastes into carboxylates by a computer-aided design tool. WASTE MANAGEMENT. 2022;142:101–10.
IEEE
[1]
M. Saavedra del Oso, A. Regueira López, A. Hospido, and M. Mauricio-Iglesias, “Fostering the valorization of organic wastes into carboxylates by a computer-aided design tool,” WASTE MANAGEMENT, vol. 142, pp. 101–110, 2022.
@article{8742454,
  abstract     = {{The carboxylate platform has the potential to constitute an outstanding opportunity for converting organic wastes into chemicals and other value-added products within a circular economy framework. However, its development is still hampered by technological and financial constraints due to difficulties at forecasting the carboxylates yields by different wastes. This work provides a framework that can be the key to foster circular economy and bridge the development risks, allowing early-stage evaluation of process performance. This framework, which is implemented as a computer-aided design tool, is comprised by: (i) a library of substrates including their characterization and appropriate kinetic parameter selection, (ii) an integral kinetic and stoichiometric model which solves both identified gaps regarding the disintegration mechanisms and the acidogenic stoichiometry variability in the anaerobic mono and cofermentation of complex organic wastes, and (iii) a set of indicators to interpret simulation results and assist the decision making; and presents a showcase of applications supported by two case studies. These case studies show that the optimal conditions to steer VFA spectrum towards odd-chain VFA in MCF of regrind pasta are neutral pH (6.5-7) and a relatively low HRT (3-4 days), while cofermentation of tuna canning wastewater and regrind pasta follows interactive mechanisms that cannot be captured by a "naive approach", i.e. by adding up the individual contributions. Finally, it is discussed how value chain actors with different interests can benefit from the proposed tool: identifying technical, economic, and environmental bottlenecks, and proposing innovative solutions prior to costly lab research and piloting.}},
  author       = {{Saavedra del Oso, Mateo and Regueira López, Alberte and Hospido, Almudena and Mauricio-Iglesias, Miguel}},
  issn         = {{0956-053X}},
  journal      = {{WASTE MANAGEMENT}},
  keywords     = {{Early-stage design,Aided decision making,Resource recovery,VFA production,Mathematical modelling,VOLATILE FATTY-ACIDS,FOOD WASTE,ACIDOGENIC FERMENTATION}},
  language     = {{eng}},
  pages        = {{101--110}},
  title        = {{Fostering the valorization of organic wastes into carboxylates by a computer-aided design tool}},
  url          = {{http://dx.doi.org/10.1016/j.wasman.2022.02.008}},
  volume       = {{142}},
  year         = {{2022}},
}

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