Influence of the N: P supply ratio on biomass productivity and time-resolved changes in elemental and bulk biochemical composition of Nannochloropsis sp.
Journal article, 2014

This work reports for the first time the detailed impacts of dual nitrogen (N) and phosphorus (P) stress on growth dynamics and biochemical composition in the Eustigmatophyte Nannochloropsis sp. P-stress concurrent with N-stress had subtle effects on culture bulk biochemical composition, but negatively influenced biomass productivity. However, the N:P supply ratio can be raised to at least 32:1 without compromising productivity (yielding a maximum lipid content of 52% of dry weight and volumetric lipid concentration of 233mgL-1). The maximum biomass and lipid yields per unit of cell-P were 1.2kgDW (gP)-1 and 0.54kglipid (gP)-1. The P concentration of many common media is thus in surplus for optimal Nannochloropsis sp. biomass and lipid production, offering potential for significant savings in P usage and improving the sustainability of algal cultivation. © 2014 Elsevier Ltd.

Nitrogen deficiency

Microalgae

Nannochloropsis sp.

Lipid accumulation

Phosphorus usage

Author

Joshua Mayers

Chalmers, Chemical and Biological Engineering, Industrial biotechnology

K.J. Flynn

R.J. Shields

Bioresource Technology

0960-8524 (ISSN)

Vol. 169 588-595

Subject Categories

Bioprocess Technology

Bioenergy

Microbiology

Plant Biotechnology

DOI

10.1016/j.biortech.2014.07.048

More information

Created

10/7/2017