In wastewater treatment process, demulsifier is a common chemical agent. So why are demulsifiers used in sewage treatment?
The role of demulsifier
Demulsifier is a surfactant that can destroy the emulsion liquid system, and its main function is to destroy the emulsion liquid system in sewage, so that it can be separated into larger droplets and water phases, so as to facilitate subsequent treatment. The demulsifier destroys the emulsion mainly by partially replacing the stable film. Some agents are put in to destroy the stable double-layer structure and stabilize the emulsion system, so as to achieve the purpose of two-phase separation. These agents used to achieve the destruction of emulsification are called demulsifiers.
Milky liquid system in sewage
In the sewage treatment process, there will be some emulsion systems in the sewage, such as oil-water emulsion, emulsion dye wastewater, biological sludge and so on. These milky liquid systems will cause difficulties in the subsequent treatment and affect the treatment effect.
Application of demulsifier
Demulsifier is mainly used in the treatment of biological sludge, the treatment of industrial wastewater, oil and water separation and other fields, in the treatment of biological sludge, demulsifier can destroy colloidal substances in biological sludge, so that it is separated into larger particles, convenient for subsequent treatment. In the treatment of industrial wastewater, demulsifier can destroy the milky liquid system in the wastewater, so as to facilitate subsequent treatment. In oil-water separation, demulsifier can destroy the oil-water emulsion liquid system and separate it into larger oil droplets and water phases, which is convenient for subsequent treatment.
In the sewage treatment will encounter a variety of emulsified sewage, and accompanied by high concentration, complex composition, SS and other characteristics, increase the difficulty of sewage treatment. By adding demulsifier can quickly achieve the established effect, there is an irreplaceable role
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