Biomass based biofuel production systems benefit from a carbon
credit associated with the uptake of carbon dioxide in the
growth phase. The GHG emissions for a WTP systems boundary
for the HTL pathway results in net negative CO2-eq emissions of
11.4 g CO2-eq MJ1. The aqueous phase from the HTL unit contains
ammonium and phosphite, which represent a co-product credit,
and is assumed to be recycled and supplement the nutrient
requirements for microalgae growth. In terms of GWP, a benefit
of bio-oil recovery through HTL results from the processing of a
wet microalgae slurry, eliminating the energy and GHG emissions
associated with drying. In addition, HTL processing produces a
small quantity of combustible gases which are burned to improve
the energetics of the system. Compared to conventional diesel, the
HTL pathway for the production of renewable diesel results in a
32.5% reduction in GHG emissions based on a WTW system
Biomass based biofuel production systems benefit from a carboncredit associated with the uptake of carbon dioxide in thegrowth phase. The GHG emissions for a WTP systems boundaryfor the HTL pathway results in net negative CO2-eq emissions of11.4 g CO2-eq MJ1. The aqueous phase from the HTL unit containsammonium and phosphite, which represent a co-product credit,and is assumed to be recycled and supplement the nutrientrequirements for microalgae growth. In terms of GWP, a benefitof bio-oil recovery through HTL results from the processing of awet microalgae slurry, eliminating the energy and GHG emissionsassociated with drying. In addition, HTL processing produces asmall quantity of combustible gases which are burned to improvethe energetics of the system. Compared to conventional diesel, theHTL pathway for the production of renewable diesel results in a32.5% reduction in GHG emissions based on a WTW system
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