Integrating Algae with Bioenergy Carbon Capture and Storage (ABECCS) Increases Sustainability
- College of Agriculture, Forestry, and Natural Resource Management University of Hawaii at Hilo Hilo HI USA, B&,D Engineering and Consulting LLC Lander WY USA
- College of Agriculture, Forestry, and Natural Resource Management University of Hawaii at Hilo Hilo HI USA, Cinglas Ltd Chester UK
- College of Agriculture, Forestry, and Natural Resource Management University of Hawaii at Hilo Hilo HI USA, Department of Biological and Environmental Engineering Cornell University Ithaca NY USA, Biology Department and Marine Laboratory Duke University Beaufort NC USA
- College of Agriculture, Forestry, and Natural Resource Management University of Hawaii at Hilo Hilo HI USA, Department of Earth and Atmospheric Sciences Cornell University Ithaca NY USA
- Biology Department and Marine Laboratory Duke University Beaufort NC USA
Bioenergy carbon capture and storage (BECCS) has been proposed to reduce atmospheric CO2 concentrations, but concerns remain about competition for arable land and freshwater. The synergistic integration of algae production, which does not require arable land or freshwater, with BECCS (called “ABECCS”) can reduce CO2 emissions without competing with agriculture. This study presents a technoeconomic and life-cycle assessment for colocating a 121-ha algae facility with a 2,680-ha eucalyptus forest for BECCS. The eucalyptus biomass fuels combined heat and power (CHP) generation with subsequent amine-based carbon capture and storage (CCS). A portion of the captured CO2 is used for growing algae and the remainder is sequestered. Biomass combustion supplies CO2, heat, and electricity, thus increasing the range of sites suitable for algae cultivation. Economic, energetic, and environmental impacts are considered. The system yields as much protein as soybeans while generating 61.5 TJ of electricity and sequestering 29,600 t of CO2 per year. More energy is generated than consumed and the freshwater footprint is roughly equal to that for soybeans. Financial break-even is achieved for product value combinations that include 1) algal biomass sold for $$\$$1,400$/t (fishmeal replacement) with a $$\$$68$/t carbon credit and 2) algal biomass sold for $$\$$600$/t (soymeal replacement) with a $$\$$278$/t carbon credit. Sensitivity analysis shows significant reductions to the cost of carbon sequestration are possible. The ABECCS system represents a unique technology for negative emissions without reducing protein production or increasing water demand, and should therefore be included in the suite of technologies being considered to address global sustainability.
- Research Organization:
- Duke Univ., Durham, NC (United States); B&D Engineering and Consulting LLC, Lander, WY (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- DE‐EE0007091; EE0007091
- OSTI ID:
- 1429519
- Alternate ID(s):
- OSTI ID: 1429522; OSTI ID: 1508369; OSTI ID: 1897645
- Journal Information:
- Earth's Future, Journal Name: Earth's Future Vol. 6 Journal Issue: 3; ISSN 2328-4277
- Publisher:
- American Geophysical Union (AGU)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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