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Utilizing the Eutrophication in Bioresources Recovery and Biogas Production – A Case Study in Egypt
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1
Environmental Engineering, Zagazig University, Zagazig 44519, Egypt
 
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Department of Civil and Environmental Engineering (DICA), Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milan 20133, Italy
 
3
Department of Architecture and Urban Studies (DASTU), Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milan 20133, Italy
 
 
Publication date: 2022-12-01
 
 
Corresponding author
Mohamed Khalil   

Department of Civil and Environmental Engineering (DICA), Politecnico di Milano, Piazza Leonardo da Vinci, 32, Milan 20133, Italy
 
 
J. Ecol. Eng. 2022; 23(12):299-313
 
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ABSTRACT
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 m3 per hectare of algae pond and the methane yield (Y) from anaerobic digestion was 73 m^3 d^(-1).
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