Department of Chemical and Nuclear Engineering, Universidad Politécnica de Valencia, C/Camino de Vera s/n, 46022 Valencia, Spain.
J Hazard Mater. 2010 Jun 15;178(1-3):883-9. doi: 10.1016/j.jhazmat.2010.02.020. Epub 2010 Feb 12.
Conventionally treated petrochemical wastewaters contain substantial quantities of hazardous pollutants. In addition, wastewater reuse is being enhanced as a consequence of the shortage of fresh water. Advanced petrochemical wastewater treatment for water reuse will reduce hazardous pollutants discharges as well as water consumption. Reverse osmosis is a suitable technology to obtain pure water. This work studies the adequacy of different pretreatments applied to a petrochemical secondary effluent to produce a suitable feeding for reverse osmosis treatment. The permeate obtained can be used in the petrochemical industry for different processes. In this work, several experiments (granulated activated carbon filtration, ultrafiltration, nanofiltration and granulated activated carbon filtration coupled with nanofiltration) were performed to improve the conventional pretreatment. Total organic carbon, chemical oxygen demand, turbidity and silt density index were used to evaluate water quality for reverse osmosis feeding. In granulated activated carbon filtration, all the measured parameters but silt density index indicated a good filtrate quality to feed reverse osmosis membranes. Although the ultrafiltration permeate obtained was suitable for reverse osmosis, nanofiltration and granulated activated carbon filtration coupled with NF provided a better effluent quality for reverse osmosis than the other pretreatments studied.
传统处理的石化废水中含有大量的危险污染物。此外，由于淡水短缺，废水再利用也在增加。先进的石化废水处理以实现水的再利用将减少危险污染物的排放和用水量。反渗透是获得纯水的合适技术。这项工作研究了不同预处理方法应用于石化二级出水以生产适合反渗透处理的进料的充分性。获得的渗透物可用于石化行业的不同工艺。在这项工作中，进行了几项实验（颗粒活性炭过滤、超滤、纳滤和颗粒活性炭过滤与纳滤结合）以改进常规预处理。总有机碳、化学需氧量、浊度和泥沙密度指数用于评估反渗透给水中的水质。在颗粒活性炭过滤中，除了泥沙密度指数外，所有测量的参数都表明滤液质量良好，适合反渗透膜。尽管超滤得到的渗透物适用于反渗透，但纳滤和颗粒活性炭过滤与 NF 结合为反渗透提供了比其他研究的预处理更好的出水质量。
