PERSONAL DE APOYO
RAMOS Fernando Daniel
artículos
Título:
A Process Systems Engineering approach for the sustainable design of cyanobacteria-based integrated biorefineries and their heat exchanger network
Autor/es:
MATIAS RAMOS; ROMINA LASRY TESTA; FERNANDO D. RAMOS; VANINA ESTRADA; M. SOLEDAD DIAZ
Revista:
ACS Sustainable Chemistry & Engineering
Editorial:
American Chemical Society
Referencias:
Año: 2024 vol. 12
ISSN:
2168-0485
Resumen:
As climate change increasingly impacts the environment and society worldwide, advanced biofuels produced fromcyanobacteria constitute a nature-based solution to the capture andstorage of the atmospheric greenhouse gas carbon dioxide bycontinual or enhanced biological processes. We propose a mixedinteger nonlinear programming problem to address the optimaldesign of a biorefinery and its heat exchanger network based onSynechocystis sp. PCC 6803, aiming to maximize the sustainabilitynet present value in a superstructure approach. The optimal schemeincludes production of pigments and fourth-generation bioethanol,self-supply of energy, and recycling of enriched nutrient streams.Numerical results provide a sustainability net present value of117.55 M USD, rendering a competitive fourth-generationbioethanol production cost of 0.40 USD/kg of bioethanol. Simultaneous heat integration improves the objective function, showingthat reducing environmental burden has a greater impact than minimizing the capital investment in heat exchangers, compared tothe case of no heat integration. Sensitivity analysis shows that further enhancement of Synechocystis ethanol productivity is crucial toimprove sustainability.
