Skip to main content

Combining Microalgae-Based Wastewater Treatment with Biofuel and Bio-Based Production in the Frame of a Biorefinery

  • Chapter
  • First Online:
Grand Challenges in Algae Biotechnology

Abstract

Conventional wastewater treatment (WWT) is currently based on the action of heterotrophic and nitrifying bacteria supported by mechanical aeration in a sequence of interconnected aerobic, anoxic, and anaerobic processes. It provided satisfactory levels of pollutant removal, but at the expenses of high-energy consumption and environmental impacts (high CO2 footprint, nutrient losses, and secondary pollution due to the use of chemicals).

Algal-bacterial systems constitute a sustainable and cost-effective alternative WWT based in solar-driven oxygenation (mediated by photosynthesis), enhanced nutrient assimilation into the biomass (resulting from combined auto-, mixo-, and heterotrophic growth), and efficient pathogen removal (due to high pH and O2 concentrations). Moreover, microalgae-based WWT can be combined with flue gas treatment since microalgae are able to bioconvert CO2 into biomass that can be transformed efficiently into biofuels, biofertilizers, and bioplastics or allow the recovery of high-value products using subcritical water extraction.

Many industries generate huge amounts of wastewater in their processes (e.g., urban, aquaculture, poultry, cattle, swine, dairy, brewery, tobacco, etc.) with high loads of organics and nutrients that need to be removed before they can be discharged safely into the environment.

The whole process can be envisaged as a microalgae-based biorefinery, which is crucial for the full use and commercialization of microalgae in various areas, allowing the incorporation of a large range of products and associated industries, which brings enormous benefits for bioeconomy and emerging societies.

This chapter provides the view and results from the authors concerning the treatment of several WWs, the characterization of the produced microalgae biomass, the biochemical and thermochemical conversion of the biomass, as well as the extraction of compounds toward different biofuels and bio-based products. The importance of these coupling processes into a biorefinery and bioeconomy frames will be validated by a literature review of life cycle assessment to highlight the added value from an environmental perspective.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 169.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 219.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 219.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

References

Download references

Acknowledgment

The authors would like to acknowledge the following European projects: COST Action 1408-EUALGAE-European network for algal-bio-products, ERANETLAC/0001/2014 (ELAC2014/BEE0357) GREENBIOREFINERY-Processing of brewery wastes with microalgae for producing valuable compounds. The GREENBIOREFINERY project is implemented in the framework of ERANet-LAC, a Network of the European Union (EU), Latin America and the Caribbean Countries (CELAC) co-funded by the European Commission within the 7th Framework Programme for Research and Technology Development (FP7). Support is provided by the following national funding organizations: MINCYT, Argentina; COLCIENCIAS, Colombia; FCT, Portugal; and ISCIII, Spain; SABANA—Sustainable integrated Algae Biorefinery for the production of bioactive compounds for Agriculture and Aquaculture Grant Agreement No. 727874. PHOENIX—People for the European Bio-Energy Mix project (H2020-MSCA-RISE-2015) and special thanks to his Portuguese Coordinator Dr. Luis Duarte (LNEG); ALGAVALOR - Lisboa-01-0247-FEDER-035234, supported by Operational Programme for Competitiveness and Internationalization (COMPETE2020), by Lisbon Portugal Regional Operational Programme (Lisboa 2020) and by Algarve Regional Operational Programme (Algarve 2020) under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF). The financial support from the Regional Government of Castilla y León and the EU-FEDER programme (CLU 2017-09 and UIC 71) are gratefully acknowledged.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Luisa Gouveia .

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2019 Springer Nature Switzerland AG

About this chapter

Check for updates. Verify currency and authenticity via CrossMark

Cite this chapter

Ferreira, A. et al. (2019). Combining Microalgae-Based Wastewater Treatment with Biofuel and Bio-Based Production in the Frame of a Biorefinery. In: Hallmann, A., Rampelotto, P. (eds) Grand Challenges in Algae Biotechnology. Grand Challenges in Biology and Biotechnology. Springer, Cham. https://doi.org/10.1007/978-3-030-25233-5_9

Download citation

Publish with us

Policies and ethics