苏州工业园排放标准

Sewage

SIP has its own Sewage Treatment Works was developed by CSSD and has started operation since November 1998. The current treatment capacity of this plant is 100,000 m3/day and will be increased to 500,000 m3//day as the park develops.

Fee and Tariffs

The fee structure for sewage is similar to that of water. There are one-off payments for connecting to the sewage network. These are the Increased Capacity Fee (增容费) and Engineering Fee (工程费). In addition, there are monthly consumption fees.

Increased Capacity Fee

This will be computed based on 80% of the daily peaked capacity consumption of water at RMB 600/m3

Note: Sewage is discharged through a designated connection point under the road surface fronting the user’s land plot. All charges incurred in connecting to its own premises is the user’s responsibility. (See Engineering Fee).

Engineering Fee

These are the fees incurred for connecting the sewage and rainwater pipes from designated points near the outside boundary of the user’s land plot to the user’s premises. The estimated costs:

Connection of a sewage pipe (DN 300mm, L25 m) RMB 2500

Connection of a rainwater pipe (DN450mm, L10 m) RMB 400

Consumption Fee (Wef 1 April 1998)

Industrial Sewage RMB 0.80/ m3

Commercial Sewage RMB 0.80/ m3

Domestic Sewage RMB 0.80/ m3

SIP Sewage Discharge Standard (Same as State)

Sewage Discharge Parameters污水排放限值Standard (mg/L)

Upper Concentration Limits for the First Class Pollutants第一类污染物浓度限值

1 Total mercury 总汞0.05

2 Alkyl mercury 烷基汞Must not be detected

3 Total cadmium 总镉0.1

4 Total chromium 总铬 1.5

5 Hexavalent chromium Compounds 六价铬0.5

6 Total arsenic 总砷0.5

7 Total lead 总铅 1.0

8 Total nickel 总镍 1.0

9 Total beryllium 总铍0.005

10 Total argentum 总银0.5

Upper Concentration Limits for the Second Class Pollutants第二类污染物浓度限值

1 pH value 6-9

2 Total Suspended Solids (TSS) 400

3 Grease & Oil 100

4 Mineral Oil 矿物油30

5 Formaldehyde 5.0

6 Benzene series compounds 2.5

7 Total cyanide 1.0

8 Sulphide 2.0

9 Volatile Phenol 2.0

10 Nitrobenzene 5.0

11 Biochemical Oxygen Demand (5 days at 20o C) 300

12 Chemical Oxygen Demand 500

13 Organic Phosphorus 0.5

14 Aniline 5.0

15 Fluoride 20

16 Total copper 2.0

17 Total zinc 5.0

18 Total manganese 5.0

19 Total Dissolved Solids 2000

Note:

1. Sewage to be discharged into sewage pipes must not contain substances containing highly flammable, explosive and toxic gases; solid substances that block the pipe; substances harmful to staff; substances which affect utilisation, treatment and final discharge of sewage; Viruses

(e.g. typhoid fever, tuberculosis and pneumonia etc); Radioactive substances.

2. Sewage, which exceeds these standards, shall not be diluted to reduce its concentration and discharged into the sewage pipes. Based on the current conditions of the sewage system, the maximum concentration of the following three types of pollutants may selectively be relaxed to TSS : 600mg/l; BOD: 500 mg/l (5d 20o c), COD: 750mg/l. Please apply directly to the SIP Environment Protection Bureau (EPB).

3. SIP Sewage Discharge Standard is the same as the National Standards. If there are any parameters that are not listed in the table, please refer to the National Standard or consult with