Journal
BIORESOURCE TECHNOLOGY
Volume 137, Issue -, Pages 302-310Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.02.104
Keywords
Biodiesel; Biogas; Life-cycle analysis; Microalgae; Supercritical gasification
Funding
- Korean Ministry of Environment [405-112-039]
- Pohang Steel Company [2011Z066]
- Korea Environmental Industry & Technology Institute (KEITI) [405-112-039] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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With a target production of 1000 ton of dry algae/yr, lipid content of 30 wt.%, and productivity of 30 g/m(2)-d in a 340-day annual operation, four common scenarios of microalgae bioenergy routes were assessed in terms of cost, energy, and CO2 inputs and outputs. Scenario I (biodiesel production), Scenario 2 (Scenario 1 with integrated anaerobic digestion system), Scenario 3 (biogas production), and Scenario 4 (supercritical gasification) were evaluated. Scenario 4 outperformed other scenarios in terms of net energy production (1282.42 kWh/ton algae) and CO2 removal (1.32 ton CO2/ton algae) while Scenario 2 surpassed the other three scenarios in terms of net cost. Scenario 1 produced the lowest energy while Scenario 3 was the most expensive bioenergy system. This study evaluated critical parameters that could direct the proper design of the microalgae bioenergy system with an efficient energy production, CO2 removal, and economic feasibility. (C) 2013 Elsevier Ltd. All rights reserved.
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