A method for processing industrial sewage belongs to the technical field of sewage treatment. It is to lead the sewage to the sump, adjust the pH at the end of the sump, and use the first-stage dissolved air pump to raise it to the first-stage pressure dissolving tank, and at the same time suck in air and the coagulant decolorant,

It will be in the first-stage pressure dissolving tank The first-level saturated dissolved air water inside is suddenly released to the first-level air flotation tank to form the first-level treated water; the first-level treated water overflows into the buffer tank, and then the second-level dissolved air pump is used to control the pH to raise the first-level treated water to the second pressure In the dissolved air tank.

Air and coagulant decolorizing agent are sucked in at the same time, and the secondary saturated dissolved air water in the secondary pressure dissolved air tank is suddenly released to the secondary air flotation tank to form the secondary treated water, which overflows to the sedimentation tank and is discharged after precipitation.

The floating mud in the primary and secondary air flotation tanks enters the floating mud tank, press-filtered into a filter cake, and the filtrate is returned to the sump. The CODcr, decolorization rate, SS and BOD5 removal rates of industrial wastewater treated by this method are 80-90%, 95%, 90% or more, and 75-80% respectively, which meets the GB8978-1996 first-level water discharge standard.

Hospital sewage treatment usually includes primary treatment and secondary treatment. Generally speaking, if the treated effluent is discharged into the municipal sewer, only the primary treatment is usually carried out; if the treated effluent is directly discharged into the river, the primary and secondary treatment are required; for areas with strict discharge standards.

To prevent water bodies For the eutrophication, a tertiary treatment of dephosphorization and denitrification is required. Strict collection and treatment of special hospital wastewater such as acid wastewater, washing phase wastewater, and radioactive wastewater should be carried out.

In order to alleviate the tension of water supply in some areas, advanced treatment and recycling of hospital sewage have been carried out. The actual method used to treat hospital sewage should take into account various factors such as the source of the sewage, the direction of the sewage, and the local water supply. In addition, a very important aspect of hospital sewage treatment is that it must be disinfected to kill various pathogenic microorganisms.