Integration of Microalgae-Based Bioenergy Production into a Petrochemical Complex: Techno-Economic Assessment

Ana L. Gonçalves, Maria C. M. Alvim-Ferraz, Fernando G. Martins, Manuel Simões and José C. M. Pires
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Ana L. Gonçalves: LEPABE, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal
Maria C. M. Alvim-Ferraz: LEPABE, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal
Fernando G. Martins: LEPABE, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal
Manuel Simões: LEPABE, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal
José C. M. Pires: LEPABE, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal

Energies, 2016, vol. 9, issue 4, 1-17

Abstract: The rapid development of modern society has resulted in an increased demand for energy, mainly from fossil fuels. The use of this source of energy has led to the accumulation of carbon dioxide (CO 2 ) in the atmosphere. In this context, microalgae culturing may be an effective solution to reduce the CO 2 concentration in the atmosphere, since these microorganisms can capture CO 2 and, simultaneously, produce bioenergy. This work consists of a techno-economic assessment of a microalgal production facility integrated in a petrochemical complex, in which established infrastructure allows efficient material and energy transport. Seven different scenarios were considered regarding photosynthetic, lipids extraction and anaerobic digestion efficiencies. This analysis has demonstrated six economically viable scenarios able to: (i) reduce CO 2 emissions from a thermoelectric power plant; (ii) treat domestic wastewaters (which were used as culture medium); and (iii) produce lipids and electrical and thermal energy. For a 100-ha facility, considering a photosynthetic efficiency of 3%, a lipids extraction efficiency of 75% and an anaerobic digestion efficiency of 45% (scenario 3), an economically viable process was obtained (net present value of 22.6 million euros), being effective in both CO 2 removal (accounting for 1.1 × 10 4 t per year) and energy production (annual energy produced was 1.6 × 10 7 kWh and annual lipids productivity was 1.9 × 10 3 m 3 ).

Keywords: algal fuels; bioenergy; CO 2 capture; microalgal culture; sustainability; wastewater treatment (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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