图片名称
Fangcheng County Erlangmiao Town Sewage Treatment Plant Project

Fangcheng County Erlangmiao Town Sewage Treatment Plant Project

The service scope of this project is Erlangmiao Township, Fangcheng County, and the construction scale of the sewage treatment plant is 2000m3/d. The project adopts a combined treatment process of "grid conditioning pool---cycle multiplication pool---disinfection pool". The effluent reaches the Class A standard of "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

Case description

The service scope of this project is Erlangmiao Township, Fangcheng County, and the construction scale of the sewage treatment plant is 2000m3/d. The project adopts a combined treatment process of "grid conditioning pool---cycle multiplication pool---disinfection pool". The effluent reaches the Class A standard of "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

The design scale of this project is 2000m³/d, and the water quality of the incoming and outgoing water is as follows:

Design water quality unit: mg/L

项目

CODCr

BOD5

SS

TP

TN

NH3-N

指标

350

180

200

3

40

30

The effluent of this sewage treatment project implements the Class A standard of "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

Design effluent quality unit: mg/L

项目

CODCr

BOD5

SS

TP

TN

NH3-N

指标

50

10

10

0.5

15

5(8)

Note: The value outside the brackets is the control index when the water temperature is >12℃, and the value in the bracket is the control index when the water temperature is ≤12℃.

The process flow chart of this project is as follows:

 

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The sewage flows into the grid and the adjustment tank to intercept the floating objects in the sewage; then it is lifted into the PSDEO integrated equipment by the sewage pump to carry out biological denitrification and phosphorus removal, and most of the CODCr, BOD5, and N elements in the sewage are removed to a large extent. At the same time, PAC is added to the biochemical tank to increase chemical auxiliary phosphorus removal to ensure a high phosphorus removal rate. A sand filter area is set at the end of the PSDEO tank, and the sewage is filtered by quartz sand and enters the disinfection tank. Chlorine tablets are added for disinfection, and the effluent is discharged up to the standard after disinfection; a backwash pump is set in the disinfection tank for backwashing in the sand rate area.

The excess sludge in PSDEO is discharged into the sludge tank, and then pumped by the sludge screw pump to the plate and frame filter press for dehydration treatment, and then shipped out for disposal.

The total investment of the project is about 7.78 million yuan.

Live pictures

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