Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 453, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2023.131451
Keywords
Emerging contaminants; Microalgae technologies; Wastewater strength; Dry weight reduction; Redundancy Dimensional Analysis
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Microalgae-based technologies can effectively remove organic micropollutants (OMPs) from wastewater, but the impact of wastewater characteristics on the removal is not well understood. This study evaluated the removal of sixteen OMPs by Chlorella sorokiniana cultivated in three types of wastewater. The results showed that the removal efficiency varied depending on the wastewater type, with longer retention time enhancing the removal of some OMPs. Wastewater soluble COD and biomass concentration were found to be the major factors affecting OMPs removal.
Microalgae-based technologies can be used for the removal of organic micropollutants (OMPs) from different types of wastewater. However, the effect of wastewater characteristics on the removal is still poorly understood. In this study, the removal of sixteen OMPs by Chlorella sorokiniana, cultivated in three types of wastewater (anaerobically digested black water (AnBW), municipal wastewater (MW), and secondary clarified effluent (SCE)), were assessed. During batch operational mode, eleven OMPs were removed from AnBW and MW. When switching from batch to continuous mode (0.8 d HRT), the removal of most OMPs from AnBW and MW decreased, suggesting that a longer retention time enhances the removal of some OMPs. Most OMPs were not removed from SCE since poor nutrient availability limited C. sorokiniana growth. Further correlation analyses between wastewater characteristics, biomass and OMPs removal indicated that the wastewater soluble COD and biomass concentration predominantly affected the removal of OMPs. Lastly, carbon uptake rate had a higher effect on the removal of OMPs than nitrogen and phosphate uptake rate. These data will give an insight on the implementation of microalgae-based technologies for the removal of OMPs in wastewater with varying strengths and nutrient availability.
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