Division BAT 19 In order to reduce emissions of pollutants into receiving waters from the whole mill, BAT is to use TCF or modern ECF bleaching (see description in Section 1.7.2.1), and a suitable combination of the techniques specified in BAT 13, BAT 14, BAT 15 and BAT 16 and of the techniques given below.
United Kingdom
| Technique | Description | Applicability | |
|---|---|---|---|
| a | Modified cooking before bleaching | See Section 1.7.2.1 | Generally applicable |
| b | Oxygen delignification before bleaching | ||
| c | Closed brown stock screening and efficient brown stock washing | ||
| d | Partial process water recycling in the bleach plant | Water recycling may be limited due to incrustation in bleaching | |
| e | Effective spill monitoring and containment with a suitable recovery system | Generally applicable | |
| f | Maintaining sufficient black liquor evaporation and recovery boiler capacity to cope with peak loads | Generally applicable | |
| g | Stripping the contaminated (foul) condensates and reusing the condensates in the process |