◆Process introduction

The large suspended solids are removed through the grille, and the oil and suspended solids in the water are partially removed by the preliminary oil separation. Then add a demulsifier to the water, which can destroy the emulsified liquid structure to achieve the purpose of separating the phases of the emulsified liquid. Crude oil demulsification refers to the use of demulsifiers to remove the oil and water in the emulsified oil-water mixture to achieve the purpose of crude oil dehydration and to ensure the water content standard of crude oil.

Then enter the neutralization adjustment tank, where the water volume, water quality and PH value are adjusted. The effluent enters the coagulation sedimentation tank by adding coagulant, and the coagulation produces floc precipitation to reduce the chromaticity, CODCr, SS and other indicators of the effluent. The effluent from the coagulation sedimentation tank enters the hydrolysis acidification tank. Through the coordinated action of facultative anaerobic bacteria such as hydrolysis bacteria and acid-producing bacteria, it degrades part of the organic matter, and converts insoluble organic matter into soluble organic matter, and converts difficult-to-degrade macromolecular substances into Easily degradable small molecular substances improve the biodegradability of sewage. The anoxic tank mainly refers to the denitrification reaction of the nitrification liquid in the biological contact oxidation tank to remove ammonia nitrogen, and the biological denitrification reaction of the sludge in the anoxic tank converts nitrate into nitrogen and escapes. The effluent from the anoxic tank enters the biological contact oxidation tank. A special biochemical device is installed in the tank to accumulate a large number of active microorganisms. Most of the organic matter in the sewage is degraded into CO2 and H2O, and a small part is converted into activated sludge. Ammonia nitrogen and organic nitrogen are converted into nitrite and nitrate nitrogen in the aerobic process, and recovered to the anoxic process section to be explained and removed by the denitrification process to achieve the purpose of denitrification.