Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.6/1961
Título: Biodegradability enhancement and detoxification of cork processing wastewater molecular size fractions by ozone
Autor: Santos, Diana
Silva, Maria Lúcia Almeida da
Albuquerque, António
Simoes, Rogerio
Gomes, Arlindo Caniço
Palavras-chave: Cork boiling wastewater
Cork
Biodegradability
Tratamento de águas residuais
Fractionation
Toxicity
Ozono
Efluentes da cortiça
Data: Nov-2013
Editora: Elsevier
Resumo: Cork boiling wastewater pollutants were fractionated by sequential use of four ultrafiltration membranes and five fractions were obtained: four retentates (>100, 50-100, 20-50 and 10-20 kDa) and one permeate (<10 kDa); which were used to study the correlation of molecular size with biodegradability and toxicity before and after ozonation. The results show that molecular size is correlated with organic load and restrains biodegradability. The fraction with >100 kDa corresponds to 56% of the organic load and the one with <10 kDa only 8%. The biodegradability of fractions increased 182% with fractions molecular size reduction from >100 to < 10 kDa and the chemical oxygen demand (COD) was from 3436 to 386 mg L-1. For biodegradability enhancement the best outcome of ozonation was obtained with compounds having molecular size >20 kDa and range from 5% up to 175% for applied ozone doses to COD ratios between 0.15 and 0.38.
Peer review: yes
URI: http://hdl.handle.net/10400.6/1961
ISSN: 1873-2976
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