石化废水深度处理及脱盐的中试研究

针对石化行业污水回用处理设施很快失效的现状,开发了“集成式悬浮载体生物氧化－砂滤－臭氧活性炭处理－超滤反渗透”的组合工艺对炼油厂外排水进行深度处理.连续7个月的中试结果表明,处理后外排水中COD、NH3-N、BOD5、油和浊度等均优于回用水标准,可作为工业循环冷却水、绿化用水和办公等用水;常规深度处理的出水经过超滤反渗透处理后,电导率稳定在35~40μS/cm,可作为动力车间的新鲜水,不会发生膜污染和堵塞问题.尽管外排水的水质波动很大,但是组合工艺运行稳定、可靠,具有突出的抗冲击性能.

Pilot study on oil refinery wastewater advanced treatment and desalination

As oil refinery wastewater advanced treatment devices gradually lost their function one or two years after operated in some petrochemical companies, a combined advanced treating process of “integrated suspended carrier biological oxidation, sand filtration, ozone-biological activated carbon filtration”and desalination process of “ultrafiltration and reverse osmosis (UF+RO)” were developed. Seven-month pilot-test showed that main contaminants of outlet in the advanced treatment plants could be removed thoroughly, COD, NH3-N, BOD5, oil and turbidity of the reclaimed water were better than the standard of reclaimed water; furthermore, the desalted water had the electric conductivity of 35~40μS/cm during the running of UF and RO which could be used as fresh water of power workshop. During the pilot test, the pollution and clogging of the membranes of UF and RO had not happened. The combined advanced treating process could resist the loading shocking and keep high removing efficiency and stable running.