Microalgal biomass and lipid production in mixed municipal, dairy, pulp and paper wastewater together with added flue gases

Abstract

The aim of the study was to grow microalgae on mixed municipal and industrial wastewater to simultaneously treat the wastewater and produce biomass and lipids. All algal strains grew in all wastewater mixtures; however, Selenastrum minutum had the highest biomass and lipids yields, up to 37% of the dry matter. Nitrogen and phosphorus removal were high and followed a similar trend in all three strains. Ammonium was reduced from 96% to 99%; this reduction was due to algal growth and not to stripping to the atmosphere, as confirmed by the amount of nitrogen in the dry algal biomass. Phosphate was reduced from 91% to 99%. In all strains used the lipid content was negatively correlated to the nitrogen concentration in the algal biomass. Mixtures of pulp and paper wastewater with municipal and dairy wastewater have great potential to grow algae for biomass and lipid production together with effective wastewater treatment. (C) 2014 Elsevier Ltd. All rights reserved.

Keywords

Algae; Nitrogen removal; Phosphorus removal; Total lipids; Wastewater

Published in

Bioresource Technology
2014, volume: 169, pages: 27-32

SLU Authors

• Gentili, Francesco

  • Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
    

Global goals (SDG)

SDG6 Clean water and sanitation

UKÄ Subject classification

Forest Science
Ecology

Publication identifier

• DOI: https://doi.org/10.1016/j.biortech.2014.06.061

Permanent link to this page (URI)

https://res.slu.se/id/publ/60346