Among the biomass feedstock, algal biomass has been attracting
great interest because of its low land footprint and high growth
rate [4]. Some life cycle analyses of bioenergy have been published
highlighting various advantages and disadvantages of algal biofuel
[5–9]. Among the various disadvantages, dewatering and drying of
algal biomass were reported as the main bottleneck to make algal
bioenergy energetically favorable [5]. Some researchers proposed
to reduce the energy burden of dewatering and drying, by processing
residual biomass further for bioenergy or valuable products
formation. Even though, most of the researchers concluded that
environmental friendly and energetically favorable algal bioenergy
production could be possible [7,10–14], Batan et al. [15] elaborated
the critical issue with N and P for bioenergy production, especially
resources of phosphorous are already scarce [16]. In that context,
bioenergy production using waste nutrients (N, and P) can reduce
our dependency on the inorganic nutrients for bioenergy
production