Fertiliser
Industry
-
Urea Plants
Year
of Commissioning
|
Pollutants
|
Emission
Limit
|
Prilling tower commissioned Prior to 1.1.1982 |
Particulate
matter
|
150
mg/Nm3 or
2 kg/tonne of Urea |
Prilling
tower commissioned After 1.1.1982 |
Particulate
matter
|
50
mg/Nm3 or
0.5 kg-/tonne of Urea |
-
Straight Nitrogenous Fertiliser Industry : Waste Water Discharge Standards
(Excluding the Calcium Ammonium Nitrate and Ammonium Nitrate Fertiliser)
Parameter |
Concentration
not to exceed, mg/l
(except for pH) Plants commissioned |
|
January
1, 1982 onwards
|
Prior
to January, 1982
|
|
pH |
6.5
to 8.0
|
6.5
to 8.0
|
Ammonical nitrogen |
50
|
75
|
Total kjeldahl nitrogen (TKN) |
100
|
150
|
Free ammonical nitrogen |
4
|
4
|
Nitrate Nitrogen |
10
|
10
|
Cyanide as CN |
0.2
|
0.2
|
Vanadium as V |
0.2
|
0.2
|
Arsenic as As |
0.2
|
0.2
|
Suspended Solids |
100
|
100
|
Oil & Grease |
10
|
10
|
Chromium as Cr | ||
Hexavalent*
|
0.1
|
0.1
|
Total
|
2.0
|
2.0
|
*To be complied with at the outlet of chrome removal unit.
-
Straight Nitrogenous Fertiliser Industry : Waste Water Discharge Standards
(Including the Calcium Ammonium Nitrate and Ammonium Nitrate Fertiliser)
Parameter
|
Concentration
not to exceed, mg/l (except for pH)
Plants commissioned |
|
January
1, 1982 onwards
|
Prior
to January, 1982
|
|
pH |
6.5
to 8.5
|
6.5
to 8.5
|
Ammonical nitrogen |
50
|
75
|
Total nitrogen (TKN) |
100
|
150
|
Free ammonical nitrogen |
4
|
4
|
Nitrate Nitrogen |
20
|
20
|
Cyanide as CN |
0.2
|
0.2
|
Vanadium as V |
0.2
|
0.2
|
Arsenic as As |
0.2
|
0.2
|
Suspended Solids |
100
|
100
|
Chromium as Cr* | ||
Hexavalent
|
0.1
|
0.1
|
Total
|
2.0
|
2.0
|
*To be complied with at the outlet of chromium removal unit.
- Straight Phosphate Fertiliser Industry : Waste Water Discharge Standards
Parameter
|
Concentration
not to exceed, mg/l (except for pH and temperature)
|
pH | 7.0 to 9.0 |
Phosphate as P | 5 |
Oil & Grease | 10 |
Suspended Solids | 100 |
Fluorides as F* | 10 |
Chromium as Cr** | |
Hexavalent
|
0.1 |
Total
|
2.0 |
*To be complied with at the outlet of fluoride removal unit, if the recipient system so demands, fluoride as F shall be limited to 1.5 mg/l.
**To be complied with at the outlet of chromate removal unit.
- Phosphatic
Fertiliser : Emission Standards
Parameter
|
Source
|
Emission
Limit mg/Nm3
|
Total fluoride | Phosphoric acid manufacturing unit |
25
|
Particulate matter | Granulation, mixing and grinding of rock phosphate |
150
|
-
Complex Fertiliser Industry : Waste Water Discharge Standards
(Including Calcium, Ammonium nitrate and Ammonium phosphate fertiliser)
Parameter
|
Concentration
not to exceed, mg/l (except for pH) Plants commissioned
|
|
January
1, 1982, onwords
|
Prior
to January 1, 1982
|
|
pH |
6.5
to 8.0
|
6.5
to 8.0
|
Ammonical nitrogen |
50
|
75
|
Free ammonical nitrogen |
4
|
4
|
Total kjeldahl nitrogen (TKN) |
100
|
150
|
Nitrate nitrogen |
20
|
20
|
Cyanide as CN |
0.2
|
0.2
|
Vanad |
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