Division BAT 33 In order to increase resource efficiency and to reduce the environmental impact and risk associated with the use of treatment chemicals, BAT is to reduce their consumption by using all of the techniques given below.
United Kingdom
| Technique | Description | Applicability | |
|---|---|---|---|
| (a) | Use of an efficient preservative application system | Application systems where the wood is immersed in the preservative solution are more efficient than, for example, spraying. The application efficiency of vacuum processes (closed system) is close to 100 %. The selection of the application system takes into account the use class and the penetration level needed. | Only applicable to new plants or major plant upgrades. |
| (b) | Control and optimisation of the consumption of the treatment chemicals for the specific end use | Control and optimisation of the consumption of the treatment chemicals by:
The consumption of the treatment chemicals follows suppliers’ recommendations and does not lead to exceedances of the retention requirements (e.g. set in product quality standards). | Generally applicable. |
| (c) | Solvent mass balance | The compilation, at least once every year, of organic solvent inputs and outputs of a plant as defined in Part 7(2) of Annex VII to Directive 2010/75/EU. | Only applicable to plants using solvent-based treatment chemicals or creosote. |
| (d) | Measurement and adjustment of wood moisture before treatment | Wood moisture is measured prior to treatment (e.g. by measuring the electric resistance or by weighing) and adjusted if needed (e.g. by further seasoning of the wood) in order to optimise the impregnation process and ensure the required product quality. | Only applicable if wood with a specific moisture content is needed. |