The Chinese government has been promoting energy savings and contamination
reduction as a national policy. The Jiangsu Environmental Protection Bureau
has announced "Discharge Standards of Main Water Pollutants for Municipal
Wastewater Treatment Plants & Key Industries in the Taihu Area." These
standards will be effective from January 1, 2008.
With this, corresponding companies will be charged for pollutant emissions
based on the emission allowance calculated with the new standards (by the related
section of the government). If the amount of emission exceeds the allowance,
the costs for the excess will be doubled. Firms can purchase emission credits
at the water pollutant emission trading market.
With the enforcement of "Discharge Standards of Main Water Pollutants
for Municipal Wastewater Treatment Plants & Key Industries in the Taihu Area," it
is expected that 30% of firms in the Taihu area will be forced to close, shutdown,
merge or undertake conversion of products. The following gives the details of "Discharge
Standards of Main Water Pollutants for Municipal Wastewater Treatment Plants & Key
Industries in the Taihu Area."
Table-1Discharge Standards of Pollutants
for Municipal Wastewater Treatment Plants in the Taihu Area
(For plants established before
December 31, 2007)
| No. |
Category |
COD |
Ammonia nitrogen |
Total nitrogen |
Total phosphorus |
| 1 |
Water treatment plantⅠ(1), mg/L |
50 |
5(8)(3) |
20 |
0.5 |
| 2 |
Water treatment plantⅡ(3), mg/L |
60 |
5(8)(3) |
15 |
0.5 |
Note: (1)
|
Water treatment plantⅠ：Treatment capacity
of industrial drainage is less than 50% of the total. |
| (2) |
Water treatment plant Ⅱ：Treatment capacity
of industrial drainage is more than 50% and less than 80% of the total. |
| (3) |
, (4) The number without parentheses indicatesthe limit
value when water temperature is >12°C, and the number in parentheses indicates the limit
value when water temperature is ≦12°C. |
Table-2Discharge Standards of Pollutants
for Municipal Wastewater Treatment Plants in the Taihu Area
(For plants established after
January 1, 2008)
| No. |
Category |
COD |
Ammonia nitrogen |
Total nitrogen |
Total phosphorus |
| 1 |
Water treatment plantⅠ, Ⅱ(1), mg/L |
50 |
5(8)(2) |
15 |
0.5 |
Note: (1) |
Water treatment plantⅠ,Ⅱ：PlantⅠ is
with treatment capacity of industrial drainage which is less than 50% of the
total. Plant Ⅱis with treatment capacity of industrial drainage which is
more than 50% and less than 80% of the total. |
| (2) |
The number without parentheses indicatesthe limit value
when water temperature is >12°C, and the number in parentheses indicates
the limit value when water temperature is ≦12°C. |
Table-3 Discharge Standards
of Pollutants for six major industries in the Taihu area
| No. |
Category of industry |
COD |
Ammonia nitrogen |
Total nitrogen |
Total phosphorus |
| 1 |
Dyeing and finishing, mg/L |
50 |
5 |
15 |
0.5 |
| 2 |
Chemical |
Petrochemical (including oil manufacturing), mg/L |
60 |
5 |
15 |
0.5 |
Ammonia synthesis, mg/L |
80 |
20 |
25 |
0.5 |
Others, mg/L |
80 |
5 |
15 |
0.5 |
| 3 |
Paper manufacture |
Paper and pulp/ Paper manufacturing, mg/L |
80 |
5 |
15 |
0.5 |
Refuse paper recycling, mg/L |
100 |
5 |
15 |
0.5 |
| 4 |
Steel , mg/L |
80 |
5 |
15 |
0.5 |
| 5 |
Electroplating, mg/L |
80 |
5 |
15 |
0.5 |
| 6 |
Food manufacture |
Chemical flavoring manufacturing, mg/L |
80 |
5 |
15 |
0.5 |
Beer manufacturing, mg/L |
80 |
5 |
15 |
0.5 |
Table-4 Standard displacement limit
of six major industries in the Taihu area
No. |
Category of industry |
Maximum displacement capacity |
1 |
Dyeing and finishing |
Fabric: m3/100m |
2.0 |
Fiber: m3/t |
150 |
2 |
Paper manufacture |
Paper and pulp/ Paper manufacturing |
m3/t |
12 |
Refuse paper recycling |
m3/t |
15 |
3 |
Steel |
Coking: m3/t |
2.5 |
Steel: m3/t |
2 |
4 |
Electroplating |
m3/m2 |
0.2 |
5 |
Food manufacture |
Chemical flavoring manufacturing |
m3/t |
150 |
Beer manufacturing |
m3/kL |
4.5 |
Note ：1.
|
The maximum displacement capacity for residential
drainage will not be limited. |
| 2. |
Chemical industry should follow the existing national standards. |
According to research of the Jiangsu Environmental Protection Bureau, residential
drainage and the six major industries which are dyeing, chemicals, paper manufacturing,
steel, electroplating and food manufacturing are to blame for the source of water
pollution in the Taihu area.If each industry follows the new standards, 34% of
current COD (Chemical Oxygen Demand), 50% of total phosphorus release and 66.7%
of total nitrogen emission reductions will be achieved.
|