Microalgae have demonstrated the ability to remediate wastewater nutrients efficiently, with methods to further enhance performance through species selection and biomass concentration. This work evaluates a freshwater species remediation characteristics through analysis of internal biomass N:P (nitrogen:phosphorus) and presents a relationship between composition and nutrient uptake ability to assist in species selection. Findings are then translated to an optimal biomass concentration, achieved through immobilisation enabling biomass intensification by modifying bead concentration, for wastewaters of differing nutrient concentrations at hydraulic retention times (HRT) from 3h to 10d. A HRT <20h was found suitable for the remediation of secondary effluent by immobilised Scenedesmus obliquus and Chlorella vulgaris at bead concentrations as low as 3.2 and 4.4 bead·mL−1. Increasing bead concentrations were required for shorter HRTs with 3h possible at influent concentrations <5mgPL−1.
a Cranfield University, Cranfield, MK43 0AL, UKidb Ecole Nationale Superieure de Chimie de Rennes, 35708 Rennes Cedex 7, Franceid="aff3">c Scandinavian Biogas Fuels AB, Linköping University, 58 183, Linköping, Sweden
Recommended Citation:
Rachel Whittona,Amandine Le Mé,velb,et al. Influence of microalgal N and P composition on wastewater nutrient remediation[J]. water Research,2016-01-01,Volume 91