da Silva Syllos Santos, Chiavone-Filho Osvaldo, de Barros Neto Eduardo Lins, Foletto Edson Luiz
Department of Chemical Engineering, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil.
Department of Chemical Engineering, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
J Environ Manage. 2015 Jan 1;147:257-63. doi: 10.1016/j.jenvman.2014.08.021. Epub 2014 Sep 17.
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.
本研究探讨了浮选与光芬顿技术结合对油田采出水中除油性能的影响。实验分别在柱式浮选装置和环形灯反应器中进行，用于诱导气浮和光降解步骤。使用非离子表面活性剂作为浮选剂。浮选实验数据采用一级动力学速率模型进行分析。采用两种实验设计来评估除油效率：分数实验设计和中心复合旋转设计（CCRD）。在最佳实验条件下，浮选10分钟后进行45分钟的光芬顿处理，总除油率达到99%。诱导气浮和光芬顿工艺结合的结果符合法规规定的废水排放限值。
