Utilizing the Eutrophication in Bioresources Recovery and Biogas Production – A Case Study in Egypt

In this work, the nutrients and eutrophication problem are integrated into a nature-based solution by incorporating microalgae-based nutrient removal from wastewater and collecting the residue in an anaerobic digestion plant to produce biogas that is directly exported to an existing gas-fired power plant and closes the bioresource loop.El Burullus lake in Egypt was selected as a case study because it is rich in nutrients and suitable for the integrated system.The theoretical results were promising as for one-hectare, nutrient pollution could be reduced with a total nitrogen removal rate of 4 kg•d -1 , a total phosphorus removal rate of 1.1 kg•d -1 , and a total COD removal rate of 9.3 kg•d -1 .The digester volume corresponding to the biomass produced was 120 m 3 per hectare of algae pond and the methane yield () from anaerobic digestion was 73 m 3 •d -1 .