Advanced filtering treatment technology for municipal sewage

The invention discloses an advanced filtering treatment technology for municipal sewage. The technology specifically comprises steps as follows: the municipal sewage subjected to secondary treatment is coagulated, precipitated and filtered respectively, then the municipal sewage is injected into an ozone reaction device, ozone is introduced into the device with a jet method for an ozonization reaction, then the sewage subjected to the ozonization reaction is injected into a biological contact oxidation pond for an oxidation reaction, finally, the sewage is introduced into an anaerobic pond to stay for 2.5 h, and water up to the standard is discharged after ultraviolet disinfection. According to the technology, polyferric chloride is used as a coagulant and activated silicate is used as a coagulant aid during coagulation, and the polyferric chloride and the activated silicate have a synergistic effect to promote coagulation and filtration, so that the advanced treatment effect of the sewage is more significant. With the adoption of the method, suspended solids, partial organic matters, nitrogen, ammonia and phosphorus in the sewage can be effectively removed, and the color, the smell and the like can be effectively eliminated. A reaction system of the technology is comprehensive, flexible and changeable, the cost is low, and the obtained water quality is high.