Wastewater recovery in oil refining (1982)

Panoramic shot of an oil refinery.

River near the plant.

Treatment facilities.

Biochemical treatment of oil-containing industrial wastewater.

Aerotanks.

They host the main process of cleaning oil-containing wastewater, complete or partial oxidation of organic matter, as well as inorganic sulfur and nitrogen compounds as a result of the vital activity of activated sludge microorganisms.

Activated sludge includes microorganisms of different groups: bacteria, fungi, protozoa, rotifers, and others.

There are complex ecological and physical relationships between them.

Laboratory at treatment facilities.

Personnel study the composition of activated sludge.

Microorganisms viewed under a microscope.

Cartoon explaining the principle of interaction between microorganisms.

The main role in the biochemical oxidation of contaminated wastewater belongs to aerobic bacteria that need oxygen.

Treatment facilities control panel.

Oxygen supply to the aeration tank.

Here, activated sludge is mixed with wastewater and this mixture is simultaneously saturated with oxygen.

The purified wastewater is separated from the activated sludge in a settling tank.

The activated sludge is returned to the aeration tank, and the wastewater passes through filters to reduce the content of suspended solids.

Before being fed into the circulating water supply systems, the purified wastewater is chlorinated and treated with copper sulfate to prevent biological fouling of the walls.

An inhibitor is introduced to reduce corrosion and scale.

At some plants, the water undergoes magnetic treatment.

Such water is also used for industrial and fire-fighting purposes.

Fire brigades on the territory of the enterprise.

Previously, wastewater after treatment was discharged into water bodies.

The introduction of biochemical treatment and reuse of wastewater has reduced their discharge into water bodies.

Efficiency of biochemical treatment.

Panoramic photography of an oil refinery.