A study on the impact of salinity on algae growth and nutrient recovery in a revolving algae biofilm reactor

This study created and operated a model named the Revolving Algae Biofilm reactor (RAB). The study investigated the adaptability of Chlorella vulgaris algae at different salinity levels, such as 0, 5, 10, 15, and 20‰, as well as the recovery and effectiveness of nutrients. The study finds that as the salinity level gradually increases, algal biomass is clearly affected by a decrease in growth ability. However, the study’s results also reveal that salinity in the range of 0 - 10‰ facilitates the removal of nitrogen, phosphorus, and organic matter without significantly affecting the microorganism. RAB shows that this is a potential wastewater treatment biotechnology by applying green algae, helping to ensure wastewater quality, reduce environmental pollution, and limit carbon emissions, in line with the trend toward sustainable development.