Urban sewage SDA+BAF treatment system and treatment process thereof

Abstract

The invention relates to an urban sewage SDA+BAF treatment system. The system comprises a fine separation device, an adjusting buffer tank, a facultative tank, an ultrasonic vibration sedimentation tank, an SND reactor, an SAD reactor, a BAF reactor, a clean water tank, an ozone disinfection tank and a metering discharge channel which are connected in sequence, the fine separation device is a finesilk screen filtering mechanism and has a self-cleaning function; an ultrasonic vibration separation plate is arranged in the ultrasonic vibration sedimentation tank, the SND reactor, the SAD reactorand the BAF reactor are respectively of fluidized bed type structures, and a water distribution layer, a water distribution layer and a packing layer are specially designed, and packing with specificproportions and components is arranged in each reactor. The invention also discloses a treatment process for an urban sewage SDA+BAF treatment system. The Urban sewage SDA+BAF treatment system and the treatment process thereof have the beneficial effects that the power consumption is low, the effluent quality stability is high, the physical suspended matter removal and sludge generation amount issmall, an additional carbon source is not needed, and the medicament cost is saved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an urban sewage SDA+BAF treatment system and a treatment process thereof. Background technique [0002] With the increasingly prominent problem of water pollution in our country, the improvement of urban sewage treatment and discharge standards has become the general trend. Judging from the current requirements for improving the quality of the water environment, the effluent treated by many urban sewage treatment plants is often discharged into urban rivers and becomes the water body of the river. [0003] For the effluent of my country's existing sewage treatment plants, the discharge standards mostly refer to Class I A in the "GB18918-2002 Pollutant Discharge Standards for Urban Sewage Treatment Plants". However, for the first-class A standard, its water quality is only equivalent to the inferior V-class water of surface water. This kind of water quality is discharge...

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Problems solved by technology

[0006] At present, urban sewage treatment plants are in the process of upgrading from Grade B to Grade A or quasi-surface IV, mainly due to the large investment, poor stability, and high operating costs of the water treatment process that can reach the fourth category of surface water, which leads to new construction and upgrading. None of the upgraded water plants can stabilize the treatment standards for the four types of surface water, which limits the development of urban sewage treatment

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