Revision of National Environment Standards 2010

The existing national emission standard 2010 has been revised to includes additional parameters and new standards and retains the existing parameter as it is.

Ambient Air Quality Standards 2020

PM 2.5
24-hour average : 60 µg/m3 (All areas)
Yearly average : 40 µg/m3 (All areas)

Ozone
8-Hour average : 100 µg/m3 (All areas)
1-Hour average : 180 µg/m3. (All areas)

Industrial Emission Standards 2020 (Additional parameter)

Total fluoride : 25 mg/Nm3. (value for other technologies only)

Industrial Emission Standards for Aluminium Smelting Unit 2020

Raw material handling
PM : 150 mg/Nm3

Precipitation Area (Calcination)
PM : 250 mg/Nm3
CO : 1%

Stack height (Calcination)
H = 14(Q)0.3 where Q is emission rate of SO2 in kg/hr and H is stack height in m

Smelter plant
PM
Green Anode Shop : 150 mg/Nm3
Anode Bake Oven : 50 mg/Nm3
Pot Room : 150 mg/Nm3

Total Fluoride
Anode Bake Oven : 0.8 mg/Nm3
Pre-Baked Technology : 0.8 mg/Nm3

Polyfluorinated Hydrocarbons : 01 (all types of smelting Al)

Close Menu