Oil processing wastewater treatment process and device thereof

Abstract

The invention belongs to the technical field of water pollution treatment of environmental engineering and particularly relates to an oil processing wastewater treatment process and a device thereof.The treatment process comprises the following steps: discharging oil wastewater into a water collection pond from a workshop, treating the oil wastewater through a coagulation sedimentation tank, an air flotation device, an intermediate water pond, an anaerobic tank, an anoxic pond, an aerobic pond, a secondary sedimentation pond, a biological aerated filter pond, a sand filtering pond and a carbon filtering pond. The oil processing wastewater treatment process fully considers the influence of impact load and is stable in treatment effect, low in cost and excellent in treatment effect; the content of COD (chemical oxygen demand) in the treated water is less than or equal to 30mg/L; the pH is about 7; the content of SS is low; the invention also provides the device for implementing the process; the device is reasonable in layout, compact in structure, convenient to operate and manage and excellent in treatment effect; the occupied area is reduced; the cost is reduced; the operation costcan be reduced to a maximum limit; the treatment device is simple in structure.

Description

technical field [0001] The invention belongs to the technical field of water pollution control of environmental engineering, and in particular relates to a treatment process and device for oil processing wastewater. Background technique [0002] With the improvement of people's living standards, the oil industry has developed rapidly in recent years. In the process of oil processing, a large amount of alkaline wastewater containing fatty acid salts and oil is produced in the process of alkali neutralization and water washing, and the wastewater in the refining workshop contains a large amount of soapstock. , oil, phospholipids, proteins and pigments, COD and SS in wastewater (SS stands for suspended solids: refers to solid substances suspended in water, including inorganic substances, organic substances and silt, clay, microorganisms, etc. that are insoluble in water) The concentration is high, and the pollution is serious. If it is discharged directly, it will cause river w...

AI Technical Summary

Problems solved by technology

[0002] With the improvement of people's living standards, the oil industry has developed rapidly in recent years. In the process of oil processing, a large amount of alkaline wastewater containing fatty acid salts and oil is produced in the process of alkali neutralization and water washing, and the wastewater in the refining workshop contains a large amount of soapstock. , oil, phospholipids, proteins and pigments, COD and SS in wastewater (SS stands for suspended solids: refers to solid substances suspended in water, including inorganic substances, organic substances and silt, clay, microorganisms, etc. that are insoluble in water) The concentration is high and the pollution is serious. If it is discharged directly, it will cause river water pollution, pollute the environment, and waste a lot of industrial water resources.

[0003] The previous treatment methods can no longer meet the needs of increasing production capacity, and with the development of production, the types of wastewater are increasing, and the effect of wastewater treatment needs to be improved

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