Treating effluents generated by marine aquaculture through microalgae and bacteria could become a reality. A team of researchers from the Centre for Biotechnology and Fine Chemistry (CBQF) of the Catholic University of Portugal and the Centre for Environmental and Sea Studies (CESAM) of the University of Aveiro, developed a project based on this dynamic, which resulted in a more efficient alternative to reuse water from this sector.
The GReAT – Granular microalgae-bacterial sludge for aquaculture wastewater treatment project was developed between 2018 and 2022, and funded by the Fundação para a Ciência e a Tecnologia, I.P.. The study found that “the use of granular systems alone allows for greater energy efficiency, but when using a multitrophic biomass, the symbiosis established between bacteria and microalgae can decrease the release of greenhouse gases and also promote the production of effluents with higher levels of oxygen, thus reducing the need for oxygenation for their recirculation in the aquaculture tanks”, explains Catarina Amorim, researcher at CBQF.
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