Chen Ke-Yong, Zhang Xiao-Bing, Li Jun
a College of Energy Resources , Chengdu University of Technology , Chengdu , People's Republic of China.
Environ Technol. 2016 Oct;37(19):2536-44. doi: 10.1080/09593330.2016.1153159. Epub 2016 Mar 10.
In this study, advanced treatment of heavily polluted oilfield production wastewater (OPW) was investigated employing the combination of coagulation/dissolved air flotation, heterogeneous catalytic ozonation and sequencing batch reactor (SBR) processes. Two SBR reactors were separately set up before and after the ozonation unit. The results show that microbubble flotation was more efficient than macrobubble flotation in pollutant removal. Catalytic ozonation with the prepared Fe/activated carbon catalyst significantly enhanced pollutant removal in the second SBR by improving wastewater biodegradability and reducing wastewater microtoxicity. The treatment technique decreased oil, chemical oxygen demand and NH3-N by about 97%, 88% and 91%, respectively, allowing the discharge limits to be met. Therefore, the integrated process with efficient, economical and sustainable advantages was suitable for advanced treatment of real OPW.
在本研究中，采用混凝/溶解气浮、非均相催化臭氧化和序批式反应器（SBR）工艺相结合的方法，对重污染油田采出水（OPW）进行深度处理。在臭氧化单元前后分别设置了两个SBR反应器。结果表明，微气泡浮选在去除污染物方面比大气泡浮选更有效。使用制备的Fe/活性炭催化剂进行催化臭氧化，通过提高废水的生物降解性和降低废水的微毒性，显著增强了第二个SBR中的污染物去除效果。该处理技术分别使油、化学需氧量和氨氮降低了约97%、88%和91%，达到了排放限值。因此，该具有高效、经济和可持续优势的集成工艺适用于实际OPW的深度处理。
