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Calorific values of C hlorella vulgaris ( T rebouxiophyceae) as a function of different phosphorus concentrations
Author(s) -
Chia Mathias Ahii,
Lombardi Ana Teresa,
Gama Melão Maria da Graça
Publication year - 2013
Publication title -
phycological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.438
H-Index - 44
eISSN - 1440-1835
pISSN - 1322-0829
DOI - 10.1111/pre.12026
Subject(s) - heat of combustion , biology , biomass (ecology) , phosphorus , food science , biofuel , nutrient , composition (language) , zoology , botany , agronomy , chemistry , microbiology and biotechnology , combustion , ecology , linguistics , philosophy , organic chemistry
Summary Quantification of the calorific content of microalgae is critical in studies of energy flow, trophic partitioning, plant/herbivore interactions in aquaculture and biomass production for biofuels. We investigated the calorific value and biochemical composition of C hlorella vulgaris at different phosphorus ( P ) concentrations (6.0 × 10 −7 , 2.3 × 10 −6 and 2.3 × 10 −4 mol L −1 P ). As expected, the control (2.3 × 10 −4 mol L −1 P ) supported better growth than P limited treatments. Biomolecules like total carbohydrates and lipids accumulated under P limitation, which significantly correlated with high calorific values. Lipid class composition showed that triacylglycerols were the most accumulated under P limited conditions. The calorific value reported under control conditions (13.78 kJ g −1 ) was less than those obtained under P limitation (30.47–33.07 kJ g −1 ). The highest calorific value with less growth retardation was obtained at 2.3 × 10 −6 mol L −1 P .