The use of polyaluminum chloride removal of emulsified oil wastewater technical process method Description Polyaluminum chloride removal of emulsified oil wastewater technology process method Description Oil refinery and gas station wastewater contains a large number of oil pollutants, suspended solids And phenol, etc., can be treated with coagulant aluminum chloride to remove. The coagulant used for removing emulsified oil is polyaluminum chloride, ferrous sulfate, polyaluminum chloride, basic aluminum chloride, polymeric ferric sulfate and polymeric polyacrylamide. The role of coagulant polyaluminum chloride in this: 1, neutralize or change the charge on the surface of colloidal particles, destroy the emulsifier can stabilize the emulsified oil; 2, the formation of flocs and adsorption oil beads. Refinery Shantou plant often use condensate condensate and pressurized air flotation combined approach to deal with oily wastewater, oil content can be reduced from a few hundred mg / l to about ten milligram / liter. For example, if the refinery oil-containing wastewater passes through the grease trap, the oil content is about 200mg / L. After the coagulant polyaluminum chloride and pressurized air flotation, the oil concentration can be reduced to 20mg / L Flotation) and 10mg / L (secondary flotation). Polyaluminum chloride coagulant used, the dosage of dozens of mg / L, the pH of the sewage to maintain between 6-9. Gas station gas washing wastewater contains a lot of tar, suspended solids and other impurities. Polymeric aluminum chloride 怍 coagulant can be used to deal with this wastewater. When the wastewater is acidified to pH = 3 or so, the negatively charged emulsified tar will reach neutralization, lose stability and produce obvious aggregation phenomenon. In the sedimentation tank In the very easy to separate. With the above method can remove tar 60% -70%, suspended solids 80% -90%, the treated water can be recycled, no longer efflux. This information is provided by http://www.gyzhenyu.com/ and is issued exclusively for the purified water of the source. For any transfer, please specify the address of the destination!