AI Article Synopsis
- Cultivating algal biofilms can help manage nutrient pollution, specifically nitrogen (N) and phosphorus (P), which contributes to eutrophication in water bodies.
- Laboratory tests showed that an algal biofilm, primarily made up of Oscillatoria princeps, effectively removed N and P from various water sources, achieving removal rates of up to 94.5% for N and 93% for P over 5 days.
- The biomass obtained from this cultivation contained significant nutrient recovery, with roughly 20% - 39% of nitrogen and 65% - 82% of phosphorus being reused after harvesting.
Article Abstract
Cultivating algal biofilm on nitrogen (N) and phosphorus (P) in waters presents an alternative to control eutrophication. Under laboratory conditions, efficiency on nitrogen and phosphorus removal from synthetic wastewater, secondary effluent and eutrophic lake water by algal biofilm was assessed. Algal biofilm was mainly composed of blue-green algal species Oscillatoria princeps. During a 5-day treatment, for synthetic wastewater, secondary effluent and eutrophic lake water, removal rates of TN were 57.1%, 94.5% and 93.8%, respectively, removal rates of TP were 93%, 73% and 79%, respectively. The dried algal production were 3.7 - 7.2 g x m(-2)x d(-1), and the TKN and TP of algal biomass were 5.7% - 7.2% and 0.78% - 2.44%, respectively. Recovery of nutrients in harvested algal biomass accounted for about 20% - 39% for N and 65% - 82% for P.
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