Division BAT 180

United Kingdom

In order to reduce dust and PAH emissions to air from baking, BAT is to use one or a combination of the techniques given below.

	Technique^f1	Applicability
Descriptions of the techniques are given in Section 1.10.
a	ESP, in combination with a thermal oxidation step (e.g. regenerative thermal oxidiser) when highly volatile compounds are expected	Generally applicable
b	Regenerative thermal oxidiser, in combination with a pretreatment (e.g. ESP) in cases of a high dust content in the exhaust gas	Generally applicable
c	Thermal oxidiser	Not applicable to continuous ring furnaces

BAT-associated emission levels: See Table 53.

Table 53

BAT-associated emission levels for dust and BaP (as an indicator of PAH) emissions to air from baking and rebaking

Parameter	BAT-AEL (mg/Nm³)^f2
As an average over the sampling period.
The lower end of the range is associated with the use of a combination of an ESP and a regenerative thermal oxidiser. The higher end of the range is associated with the use of a thermal oxidiser.
The lower end of the range is associated with the use of a thermal oxidiser. The upper end of the range is associated with the use of a combination of an ESP and a regenerative thermal oxidiser.
For cathode production, the upper end of the range is 0,05 mg/Nm³.
Dust	2-10^f3
BaP	0,005-0,015^f4 ^f5

Annotations

f1: Descriptions of the techniques are given in Section 1.10.
f2: As an average over the sampling period.
f3: The lower end of the range is associated with the use of a combination of an ESP and a regenerative thermal oxidiser. The higher end of the range is associated with the use of a thermal oxidiser.
f4: The lower end of the range is associated with the use of a thermal oxidiser. The upper end of the range is associated with the use of a combination of an ESP and a regenerative thermal oxidiser.
f5: For cathode production, the upper end of the range is 0,05 mg/Nm³.