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Title: Nutrient resource requirements for large-scale microalgae biofuel production: Multi-pathway evaluation

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Journal Article: Publisher's Accepted Manuscript
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Sustainable Energy Technologies and Assessments
Additional Journal Information:
Journal Volume: 19; Journal Issue: C; Related Information: CHORUS Timestamp: 2018-02-03 03:46:11; Journal ID: ISSN 2213-1388
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Citation Formats

Shurtz, Benjamin K., Wood, Byard, and Quinn, Jason C. Nutrient resource requirements for large-scale microalgae biofuel production: Multi-pathway evaluation. Netherlands: N. p., 2017. Web. doi:10.1016/j.seta.2016.11.003.
Shurtz, Benjamin K., Wood, Byard, & Quinn, Jason C. Nutrient resource requirements for large-scale microalgae biofuel production: Multi-pathway evaluation. Netherlands. doi:10.1016/j.seta.2016.11.003.
Shurtz, Benjamin K., Wood, Byard, and Quinn, Jason C. Wed . "Nutrient resource requirements for large-scale microalgae biofuel production: Multi-pathway evaluation". Netherlands. doi:10.1016/j.seta.2016.11.003.
title = {Nutrient resource requirements for large-scale microalgae biofuel production: Multi-pathway evaluation},
author = {Shurtz, Benjamin K. and Wood, Byard and Quinn, Jason C.},
abstractNote = {},
doi = {10.1016/j.seta.2016.11.003},
journal = {Sustainable Energy Technologies and Assessments},
number = C,
volume = 19,
place = {Netherlands},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.seta.2016.11.003

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  • Algae’s high productivity provides potential resource advantages over other fuel crops. However, demand for land, water, and nutrients must be minimized to avoid impacts on food production. We apply our national-scale, open-pond, growth and resource models to assess several biomass to fuel technological pathways based on Chlorella. We compare resource demands between hydrothermal liquefaction (HTL) and lipid extraction (LE) to meet 1.89E+10 and 7.95E+10 L yr-1 biofuel targets. We estimate nutrient demands where post-fuel biomass is consumed as co-products and recycling by anaerobic digestion (AD) or catalytic hydrothermal gasification (CHG). Sites are selected through prioritization based on fuel value relativemore » to a set of site-specific resource costs. The highest priority sites are located along the Gulf of Mexico coast, but potential sites exist nationwide. We find that HTL reduces land and freshwater consumption by up to 46% and saline groundwater by around 70%. Without recycling, nitrogen (N) and phosphorous (P) demand is reduced 33%, but is large relative to current U.S. agricultural consumption. The most nutrient-efficient pathways are LE+CHG for N and HTL+CHG for P (by 42%). Resource gains for HTL+CHG are offset by a 344% increase in N consumption relative to LE+CHG (with potential for further recycling). Nutrient recycling is essential to effective use of alternative nutrient sources. Modeling of utilization availability and costs remains, but we find that for HTL+CHG at the 7.95E+10 L yr-1 production target, municipal sources can offset 17% of N and 40% of P demand and animal manures can generally meet demands.« less
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