Multi-objective optimization of algal biofuel production integrating resource recirculation and quality considerations

College

Gokongwei College of Engineering

Department/Unit

Industrial Engineering

Document Type

Article

Source Title

Clean Technologies and Environmental Policy

Volume

26

First Page

1107

Last Page

1133

Publication Date

2024

Abstract

Because of rising global energy consumption, renewable energy sources have received increased attention. The use of algal biomass as feedstock for biodiesel production has been recognized for its relatively higher lipid productivity and lower impact compared to fossil fuels and other renewable sources. Yet, it faces challenges in its commercialization since fossil fuels are generally more inexpensive. The integration of various processes yielding diferent bioproducts has been encouraged to increase proftability and overall sustainability through algal biorefneries. Moreover, considering the goal to minimize waste, resource recirculation can be maximized to achieve economic and environmental sustainability. In this study, a multiobjective nonlinear optimization model for a closed-loop algal biorefnery simultaneously optimizing cost and environmental impact, integrating life cycle assessment to properly account for process unit environmental impacts, and incorporating quality degradation resulting from resource recirculation is developed. A case study is solved to demonstrate the validity and features of the proposed model. Furthermore, various scenarios are applied to understand the efects of environmental changes to the system. Results reveal important insights, which highlights the signifcance of quality as a driver of system behavior, and may be used by stakeholders to support the design and operations of algal biorefneries.

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Digitial Object Identifier (DOI)

10.1007/s10098-023-02663-4

Disciplines

Environmental Engineering

Keywords

Circular economy; Sustainable development

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