Monday, 18 January 2016

Fertiliser Industry Emission Limit and Waste Water Discharge Standards

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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