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TANNERY EFFLUENT STANDARD (AFTER PRIMARY TREATMENT): DISPOSAL CHANNEL/CONDUIT CARRYING WASTWATER TO SECONDARY TREATMENT PLANT
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| Type of Tanneries |
Parameter |
Concentration Limit
(except pH) |
| Chrome tanneries/combined chrome & vegetable tanneries |
pH
SS
Chromium concentration after treatment in the chrome waste water stream |
6.5 to 9.0
Not to exceed 600
45 |
| Vegetable tanneries |
pH
SS |
6.5 to 9.0
Not to exceed 600 |
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Note:
The above standards will apply to those tannery units which have made full contribution to a Common Effluent Treatment (CETP) comprising secondary treatment. Those who have not contributed will be governed by earlier Notification No. S.O. 64(E) dated January 18, 1988.
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Source : EPA Notification
[G.S.R 742(E) dt. 30th Aug; 1990]
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TANNERIES: EFFLUENT STANDARDS
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| Parameter |
Concentration in mg/l, except pH |
Quantum per raw hide Processed |
| pH |
6.5-9.0 |
- |
| *BOD (at 270C, 3 days) |
100 |
- |
| Suspended solids |
100 |
- |
| Sulphides (as S) |
1 |
- |
| Total Chromium (as Cr) |
2 |
- |
| Oil and grease |
10 |
- |
| Wastewater generation |
- |
28 m3/tonne |
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* For effluent discharged into inland surface waters BOD limit shall be made stricter to 30 mg/l by the concerned State Pollution Control Board.
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Source : EPA Notification
[G.S.R 415(E), 5th May 1992] |
