期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 147, 期 -, 页码 257-263出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2014.08.021
关键词
Oilfield; Produced water; Flotation; Photo-Fenton; Integration
资金
- ANP (Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis), Petrobras S.A
- CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior)
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico)
- INCT (Institutos Nacionais de Ciencia e Tecnologia de Estudos Do Meio Ambiente)
The present work investigates the conjugation of flotation and photo-Fenton techniques on oil removal performance from oilfield produced water. The experiments were conducted in a column flotation and annular lamp reactor for induced air flotation and photodegradation steps, respectively. A nonionic surfactant was used as a flotation agent. The flotation experimental data were analyzed in terms of a first-order kinetic rate model. Two experimental designs were employed to evaluate the oil removal efficiency: fractional experimental design and central composite rotational design (CCRD). Overall oil removal of 99% was reached in the optimum experimental condition after 10 min of flotation followed by 45 min of photo-Fenton. The results of the conjugation of induced air flotation and photo-Fenton processes allowed meeting the wastewater limits established by the legislations for disposal. (C) 2014 Elsevier Ltd. All rights reserved.
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