Division BAT 52 In order to reduce NOX emissions in waste gases while limiting CO emissions from the thermal treatment of off-gases in wood and wood products preservation using creosote and/or solvent-based treatment chemicals, BAT is to use technique (a) or both of the techniques given below.

United Kingdom

Technique	Description	Applicability
(a)	Optimisation of thermal treatment conditions (design and operation)	See BAT 17 (a).	Design applicability may be restricted for existing plants.
(b)	Use of low-NO_X burners	See BAT 17 (b).	Applicability may be restricted at existing plants by design and/or operational constraints.

Technique

Description

Applicability

(a)

Optimisation of thermal treatment conditions

(design and operation)

See BAT 17 (a).

Design applicability may be restricted for existing plants.

(b)

Use of low-NO_X burners

See BAT 17 (b).

Applicability may be restricted at existing plants by design and/or operational constraints.

Table 37

BAT-associated emission level (BAT-AEL) for NO_X emissions in waste gases and indicative emission level for CO emissions in waste gases to air from the thermal treatment of off-gases in wood and wood products preservation using creosote and/or solvent-based treatment chemicals

Parameter	Unit	BAT-AEL^f1(Average over the sampling period)	Indicative emission level(Average over the sampling period)
The BAT-AEL and indicative level do not apply where off-gases are sent to a combustion plant.
NO_X	mg/Nm³	20–130	No indicative level
CO	mg/Nm³	No BAT-AEL	20–150

The associated monitoring is given in BAT 45.

Annotations

Footnotes

f1: The BAT-AEL and indicative level do not apply where off-gases are sent to a combustion plant.