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 | ||