Brito, António GuerreiroDuarte, Elizabeth Fernandes de AlmeidaTeixeira, Ana Paula Sousa R.Oliveira, Sara Amaral e Silva Lima de2015-03-202015-03-202014Oliveira, S.A.S.L. - Ensaio exploratório de otimização do tratamento primário da ETAR de Beirolas para incrementar a eficiência energética. Aplicação de Moringa oleifera no processo de coagulação-floculação. Lisboa: ISA, 2014, 81 p.http://hdl.handle.net/10400.5/8258Mestrado em Engenharia do Ambiente - Instituto Superior de AgronomiaCurrently the reduction of the amount and the wastewater treatment issues are very relevant in the area of Environmental Engineering. The need to explore the optimization of primary treatment, one of the integrated line treatment of liquid fraction of a wastewater treatment plant (WWTP), and increased production of biogas from sludge generated (solid fraction) unit processes was the motivation for the preparation of this dissertation. In the present study were collected and characterized representative samples of flow of input and output in the primary settling tank of the Beirolas WWTP. Coagulation-flocculation assays and crushed seed of Moringa oleifera in Jar test were conducted in order to understand the coagulant properties of this plant. M. oleifera is a plant native to northwestern India, Pakistan and Afghanistan. The removal efficiencies achieved for turbidity, COD, BOD5 e TSS are 86, 73, 66 e 79%, respectively. The reference scenario and an exploratory optimization, given some presuppositions and theoretical values were sketched. The obtained results indicate a decrease of 20% of affluent organic load to the secondary treatment, reducing energy costs for aeration, and an increased potential for energy production, about 5%. The synergistic effect of these two factors can increase energy efficiency in WWTPporwastewatercoagulation-flocculationenergy efficiencyMoringa oleiferaoptimizationprimary treatmentmaster thesis201848023