Method for carrying out advanced treatment on extremely-viscous crude sewage

Abstract

The invention relates to a method for carrying out advanced treatment on extremely-viscous crude sewage. The extremely-viscous crude sewage enters a screen well, a horizontal-flow sedimentation tank and a pump station collecting tank, and enters a sedimentation oil removal tank to be treated, the treated extremely-viscous crude sewage flows into a sloping panel oil removal device from the sedimentation oil removal tank, and after the oil removal is carried out through a sloping panel, the sewage flows into a two-level air floatation treatment device; air floatation effluent enters a first-level hydrolysis acidification pot; the effluent of the first-level hydrolysis acidification pot enters a CAST reaction tank; the effluent of the CAST reaction tank enters a second-level hydrolysis acidification tank; the effluent of the second-level hydrolysis acidification tank enters an aeration biofilter; the effluent of the aeration biofilter enters a coagulating basin; the effluent of the coagulating basin enters a lamella sloping panel sedimentation basin; and the effluent of the lamella sloping panel sedimentation basin enters a monitoring tank. The effluent after being subjected to the treatment has the following indexes: the concentration of petroleum is less than or equal to 10mg / L, the concentration of sulfide is less than or equal to 1mg / L, the concentration of volatile phenol is less than or equal to 0.5mg / L, the concentration of CODCr is less than or equal to 100mg / L, the concentration of ammonia nitrogen is less than or equal to 15 mg / L, the concentration of SS is less than or equal to 100mg / L, and the pH value is 6-9.

Description

technical field [0001] The invention relates to a method for advanced treatment of super heavy oil sewage. Background technique [0002] The existing sewage treatment process technology route of oil refining enterprises is usually: oil refinery sewage→oil separation system→flotation system→A / O biochemical treatment system→exhaust. For refineries that process heavy oil or super heavy oil, the nature of the wastewater produced is extremely complex: high concentration of pollutants, easy to emulsify, difficult to degrade, heavy oil contained in water, difficult to separate. It is difficult to ensure that the water quality meets the standard discharge if the old three production processes are still used. Therefore, new treatment technologies need to be adopted for the refinery wastewater that processes heavy oil or super heavy oil. Contents of the invention [0003] The purpose of the present invention is to provide a method for advanced treatment of heavy oil sewage which is...

AI Technical Summary

Problems solved by technology

For refineries that process heavy oil or super heavy oil, the nature of the wastewater produced is extremely complex: high concentration of pollutants, easy to emulsify, difficult to degrade, heavy oil in water, difficult to separate

If the old three production process is still used, it is difficult to ensure that the water quality meets the discharge standards. Therefore, it is necessary to adopt new treatment technologies for the refinery wastewater that processes heavy oil or super heavy oil.

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