Influence of microalgal N and P composition on wastewater nutrient remediation

WATER RESEARCH

卷:91

Article

Whitton, Rachel¹  Le Mevel, Amandine²  Pidou, Marc¹  Ometto, Francesco³  Villa, Raffaella¹  Jefferson, Bruce¹ 

[1] Cranfield Univ, Cranfield MK43 0AL, Beds, England

[2] Ecole Natl Super Chim Rennes, F-35708 Rennes 7, France

[3] Linkoping Univ, Scandinavian Biogas Fuels AB, S-58183 Linkoping, Sweden

关键词: Microalgae;    Internal composition;    Species;    Biomass;    Immobilisation;   

DOI  :  10.1016/j.watres.2015.12.054

来源: Elsevier

【 摘 要 】

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 NT (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 3 h to 10 d. A HRT <20 h 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 3 h possible at influent concentrations <5 mgP L-1. (C) 2016 The Authors. Published by Elsevier Ltd.

【 授权许可】

Free