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| Present Environmental
Standards |
Existing emission standards for foundries
prescribed by the Central Pollution Control
Board (CPCB) are given below. |
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| Type |
Pollutant |
Concentration(mg/Nm3) |
| I. |
Cupola
capacity (melting rate):
less than 3 Mt/hr
3 Mt and above |
Particulate matter Particulate matter |
450
150 |
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| II. |
Arc furnaces
capacity: all sizes |
Particulate
matter |
150 |
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| III. |
Induction
furnaces capacity: all sizes |
Particulate
matter |
150 |
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| Note: |
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| 1. |
It
is essential that stack is constructed
over the cupola beyond the charging
door and the emissions are directed
through the stack which should be at
least six times the diameter of cupola. |
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| 2. |
In
respect of arc furnaces and induction
furnaces provision has to be made for
collecting the fumes before discharging
the emissions through stack. |
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| Source: EPA Notification,
G.S.R. 742 (E), dt. 30th August, 1990 |
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| Emission standard for SO2 from cupola furnace
is prescribed to be 300 mg/Nm3 at 12% CO2
correction as referred in MOEF notification
dated 2nd April, 1996, New Delhi. |
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| Note: From May, 2001, West
Bengal Pollution Control Board (WBPCB) has
prescribed that all foundries operating within
the Kolkata metropolitan area, must meet particulate
emission limit of 150 mg/Nm³ irrespective
of the melting capacity of the cupola. |
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