Journal
CHEMOSPHERE
Volume 291, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.132968
Keywords
Bioremediation; Cyanobacteria; Nutrients; Water; Biostimulants; Biofertilisers
Categories
Funding
- Spanish Ministry of Science, Innovation, and Universities [IJC2018-035287-I]
- SABANA project of the European Unions' Horizon 2020 Research and Innovation Programme [727874]
- AL4BIO Project - Spanish Ministry of Science, Innovation, and Universities [RTI2018-099495-A-C22]
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Microalgae based wastewater treatment is a viable strategy for recovering nutrients and producing clean water, with the added benefit of valuable biomass production. Promising results have been reported, but further research and scale-up are needed to enhance industrial relevance.
One of the main social and economic challenges of the 21st century will be to overcome the worlds' water deficit expected by the end of this decade. Microalgae based wastewater treatment has been suggested as a strategy to recover nutrients from wastewater while simultaneously producing clean water. Consortia of microalgae and bacteria are responsible for recovering nutrients from wastewater. A better understanding of how environmental and operational conditions affect the composition of the microalgae-bacteria consortia would allow to maximise nutrient recoveries and biomass productivities. Most of the studies reported to date showed promising results, although up-scaling of these processes to reactors larger than 100 m(2) is needed to better predict their industrial relevance. The main advantage of microalgae based wastewater treatment is that valuable biomass with unlimited applications is produced as a co-product. The aim of the current paper was to review microalgae based wastewater treatment processes focusing on strategies that allow increasing both biomass productivities and nutrient recoveries. Moreover, the benefits of microalgae based agricultural products were also discussed.
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