The present conservative bioenergy production estimation
could satiate 2% of energy demand of US transportation sector(0.56
billion GJ/yr). This study also highlighted that due to low
temperature, intermittent production of bioenergy could not take
into advantages of increased biomass processing after lipid extraction
from algal biomass. Advantages of increased residual biomass
processing can also be realized through technological advancement
(higher yield of algal biomass, futuristic case). In the futuristic
case, with increase in residual biomass processing 0.1 billion GJ
energy in excess can be produced. As compared to intermittent
production, continuous production of bioenergy (possible in
Florida) showed higher production of bioenergy which resulted
from increased recycling of nutrients. Estimated NRPER (0.39–
0.74) and GHG intensity (9 to 53 kg CO2 eq./GJ bioenergy produce)
from various scenarios showed comparable or lower values
of NRPER and GHG as compared to values reported in the literature.
Uses of nutrients from AD for algal bioenergy production
showed enhanced bioenergy production, as compared to standard
practices where dairy manure was anaerobically digested and
applied on the land.