Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 423, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.127153
Keywords
Contaminants of emerging concern; Microalgae; Microalgae-bacteria biofilms; Mixed cultures; Wastewater treatment
Categories
Funding
- Laboratory for Process Engineering, Environment, Biotechnology and Energy -LEPABE [UIDB/00511/2020]
- national funds through the FCT/MCTES (PIDDAC) [UIDB/04469/2020 unit]
- Portugal 2020 program [POCI-01-0247-FEDER-035234, LISBOA-01-0247FEDER-035234, ALG-01-0247-FEDER-035234]
- Portuguese Foundation for Science and Technology - FCT [2020.09538. BD]
- Fundação para a Ciência e a Tecnologia [2020.09538.BD] Funding Source: FCT
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The study reviews the advantages and advances of using microalgae for wastewater treatment, highlighting the potential of using microalgae-bacteria biofilms for CECs removal and further biomass utilization for third-generation biofuel production.
The presence of contaminants of emerging concern (CECs) in the environment has been recognized as a worldwide concern. In particular, water pollution by CECs is becoming a major global problem, which requires ongoing evaluation of water resources policies at all levels and the use of effective and innovative wastewaters treatment processes for their removal. Microalgae have been increasingly recognized as relevant for wastewater polishing, including CECs removal. These microorganisms are commonly cultivated in suspension. However, the use of planktonic microalgae for wastewater treatment has limitations in terms of microbiological contamination, process effectiveness and sustainability. The use of consortia of microalgae and bacteria represents a significant advance for sustainable wastewater polishing, particularly when the microorganisms are associated as biofilms. These immobilized mixed cultures can overcome the limitations of suspended-microalgae systems and improve the performance of the involved species for CECs removal. In addition, microalgae-bacteria based systems can offer a relevant combined effect for CECs removal and biomass production enhancement. This study reviews the advantages and advances on the use of microalgae for wastewater treatment, highlighting the potential on the use of microalgae-bacteria biofilms for CECs removal and the further biomass valorisation for third-generation biofuel production.
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