Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5332
Título: Tratamento de efluentes de suinicultura por coagulação/floculação. Estudo comparativo da utilização de biopolímeros versus coagulantes convencionais
Autor: Correia, José Carlos Paiva
Orientador: Duarte, Elizabeth Fernandes de Almeida
Fragoso, Rita do Amaral
Palavras-chave: aluminium sulphate
chitosan
coagulation/flocculation
ferric chloride
pig slurry
slurry management
Data de Defesa: 2012
Editora: ISA/UTL
Citação: Correia, J.C.P. - Tratamento de efluentes de suinicultura por coagulação/floculação. Estudo comparativo da utilização de biopolímeros versus coagulantes convencionais. Lisboa: ISA, 2012, 51 p.
Resumo: Given the growing food requirements, mainly due to the increase of the world population, the global livestock sector is more intensive. The pig production, an important sector follows this trend yielding large quantities of slurry, rich in nutrients, organic matter and higher amount of metals in the livestock effluents. Physico-chemical processes procedures are effective in the treatment of effluents, which includes coagulation / flocculation. This tecnhology was selected for the development of an experimental study on a raw effluent to simulate reality, where the nutrient removals were analyzed by coagulation / flocculation. In this study the effectiveness of conventional coagulants and polymers was compared, after optimization of the dose, agitation time and speed and volume of sludge produced. The biopolymer used was chitosan, because it is abundant and natural. Aluminum sulphate (Al2(SO4)3) was found to be more effective than ferric chloride (FeCl3), two of the most commonly used coagulant in the treatment of waste water. Comparing the results with the ones obtained by natural sedimentation, it is shown that the coagulation / flocculation is effective in removing turbidity and COD, and especially in the removal of metals analyzed. These removals exceed 60% and reduce the sludge volume by about 38%. The phosphorus, element which can cause eutrophization of the water is removed almost entirely (around 70%-94%).
Descrição: Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/5332
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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