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Publicação
Gestão/tratamento de águas residuais numa indústria de produção de rolhas de cortiça
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Autores
Orientador(es)
Resumo(s)
Cork production is intrinsically connected to Portugal, the world leader in the market. Natural
cork stoppers are the main product associated to this activity and their production process
generates low biodegradability wastewaters, namely during cork boiling and stoppers
washing. The recalcitrant compounds present in these type of wastewaters, such as phenolic
compounds, are the main responsible for its high toxicity and consequent low
biodegradability, therefore conventional biological treatment plants aren´t the suitable for this
kind of effluent.
The goal of this study was to identify and characterize quantitatively and qualitatively the
flows of wastewater in a natural cork stoppers production unit and suggest possible
treatment scenarios in order to comply with the legal regulations regarding industrial
wastewater discharge into municipal collection system.
Exploratory coagulation/flocculation assays were carried out and the best results observed
were obtained using a mixture of a conventional coagulant (aluminium sulphate) with a
biopolymer (Flox®- QTH by Grove Chemicals) achieving a removal efficiency in COD and
total phenols of 74% and 91%, respectively. Photodegration assays carried out in the
washing waters achieved interesting results reaching 75% of COD removal
The coagulation/flocculation treatment using the mixture of aluminium sulphate and
biopolymer proved to be a promising solution, however more assays should be carried out to
adjust and optimize the dosages and operational conditions
Descrição
Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia
Palavras-chave
cork cork stoppers cork boiling wastewater cork stoppers wash wastewater coagulation/flocculation
Contexto Educativo
Citação
Couceiro, R.A.A. - Gestão/tratamento de águas residuais numa indústria de produção de rolhas de cortiça. Lisboa: ISA, 2015, 68 p.