Division BAT 49

United Kingdom

In order to reduce SO₂ emissions (other than those that are routed to the sulphuric acid or liquid SO₂ plant or power plant) from primary and secondary copper production, BAT is to use one or a combination of the techniques given below.

	Technique	Applicability
a	Dry or semi-dry scrubber	Generally applicable
b	Wet scrubber	Applicability may be limited in the following cases: very high off-gas flow rates (due to the significant amounts of waste and waste water generated) in arid areas (due to the large volume of water necessary and the need for waste water treatment)
c	Polyether-based absorption/desorption system	Not applicable in the case of secondary copper production. Not applicable in the absence of a sulphuric acid or liquid SO₂ plant

Technique

Applicability

Dry or semi-dry scrubber

Generally applicable

Wet scrubber

Applicability may be limited in the following cases:

very high off-gas flow rates (due to the significant amounts of waste and waste water generated)
in arid areas (due to the large volume of water necessary and the need for waste water treatment)

Polyether-based absorption/desorption system

Not applicable in the case of secondary copper production.

Not applicable in the absence of a sulphuric acid or liquid SO₂ plant

BAT-associated emission levels: See Table 6.

Table 6

BAT-associated emission levels for SO₂ emissions to air (other than those that are routed to the sulphuric acid or liquid SO₂ plant or power plant) from primary and secondary copper production

Parameter	Process	BAT-AEL (mg/Nm³)^f1
As a daily average or as an average over the sampling period.
In the case of using a wet scrubber or a concentrate with a low sulphur content, the BAT-AEL can be up to 350 mg/Nm³.
SO₂	Primary copper production	50-500^f2
SO₂	Secondary copper production	50-300

Annotations

Footnotes

f1: As a daily average or as an average over the sampling period.
f2: In the case of using a wet scrubber or a concentrate with a low sulphur content, the BAT-AEL can be up to 350 mg/Nm³.