The invention relates to an integral treatment process of the oily
sewage of an
oil field. The process flow in the invention is as follows:
settling sand, removing oil, breaking
emulsion through air flotation, treating with a
microwave-enhanced Fenton
system, performing
flocculation and air flotation, performing precision filtering, performing
catalytic ozonation with an
activated carbon fiber felt, and performing
ultrafiltration to obtain
clean water. By adopting the integral treatment process, the operations of oil removal,
emulsion breaking, advanced oxidation,
flocculation,
catalytic ozonation and membrane separation can be continuously realized. The floor space of equipment in the invention is small; the treatment process is suitable for various oily
sewage and has obvious
treatment effect; the removal rate of the
chemical oxygen demand (COD) of
raw water is more than 96%, and the
oil content and the removal rate of suspended matters are 100%; and the
turbidity of the obtained water is 4-6 NTU. The main indexes of the process provided by the invention such as the COD,
oil content, suspended matters,
turbidity and the like are better than those of the current oily
sewage treatment process in oily
sewage treatment; and the quality of the
treated water can meet the related rules of the Integrated
Wastewater Discharge Standard (GB8978-1996) and the
Environmental Quality Standards for
Surface Water (GB3838-2002).