Division BAT-associated emission levels

United Kingdom

See Table 1 and Table 2. These BAT-associated emission levels are not applicable to dissolving kraft pulp mills.

The reference waste water flow for kraft mills is set out in BAT 5.

Table 1

BAT-associated emission levels for the direct waste water discharge to receiving waters from a bleached kraft pulp mill

Parameter	Yearly averagekg/ADt^f1
The BAT-AEL ranges refer to market pulp production and the pulp production part of integrated mills (emissions from papermaking are not included).
A compact biological waste water treatment plant can result in slightly higher emission levels.
The upper end of the range refers to mills using eucalyptus from regions with higher levels of phosphorus (e.g. Iberian eucalyptus).
Applicable for mills using chlorine containing bleaching chemicals.
For mills producing pulp with high strength, stiffness and high purity properties (e.g. for liquid packaging board and LWC), emissions level of AOX up to 0,25 kg/ADt may occur.
Chemical oxygen demand (COD)	7 – 20
Total suspended solids (TSS)	0,3 – 1,5
Total nitrogen	0,05 – 0,25^f2
Total phosphorus	0,01 – 0,03 Eucalyptus: 0,02 – 0,11 kg/ADt^f3
Adsorbable organically bound halogens (AOX)^f4 ^f5	0 – 0,2

Table 2

BAT-associated emission levels for the direct waste water discharge to receiving waters from an unbleached kraft pulp mill

Parameter	Yearly averagekg/ADt^f6
The BAT-AEL ranges refer to market pulp production and the pulp production part of integrated mills (emissions from papermaking are not included).
A compact biological waste water treatment plant can result in slightly higher emission levels.
Chemical oxygen demand (COD)	2,5 – 8
Total suspended solids (TSS)	0,3 – 1,0
Total nitrogen	0,1 – 0,2^f7
Total phosphorus	0,01 – 0,02

The BOD concentration in the treated effluents is expected to be low (around 25 mg/l as a 24-hour composite sample).

Annotations

f1: The BAT-AEL ranges refer to market pulp production and the pulp production part of integrated mills (emissions from papermaking are not included).
f2: A compact biological waste water treatment plant can result in slightly higher emission levels.
f3: The upper end of the range refers to mills using eucalyptus from regions with higher levels of phosphorus (e.g. Iberian eucalyptus).
f4: Applicable for mills using chlorine containing bleaching chemicals.
f5: For mills producing pulp with high strength, stiffness and high purity properties (e.g. for liquid packaging board and LWC), emissions level of AOX up to 0,25 kg/ADt may occur.
f6: The BAT-AEL ranges refer to market pulp production and the pulp production part of integrated mills (emissions from papermaking are not included).
f7: A compact biological waste water treatment plant can result in slightly higher emission levels.