Carbon dioxide capture and nutrients removal utilizing treated sewage by concentrated microalgae cultivation in a membrane photobioreactor

► Submerged membrane filtration enabled high algae productivity in treated sewage. ► Highest TN removal was 91%. Phosphorous became a limiting factor of algal growth. ► The CO2 capture rate was highest when HRT was 1 day and SRT was 18 days. ► Botryococcus braunii became predominant to Chlorella and Spirulina spp. ► The reactor performance could be improved further by increase of nutrients loading.