# Commission Implementing Decision (EU) 2020/2009 of 22 June 2020 establishing the best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions, for surface treatment using organic solvents including preservation of wood and wood products with chemicals (notified under document C(2020) 4050) (Text with EEA relevance), Division BAT 20: In order to reduce water consumption and waste water generation from aqueous processes (e.g. degreasing, cleaning, surface treatment, wet scrubbing), BAT is to use technique (a) and an appropriate combination of the other techniques given below.

Extent: E+W+S+N.I.

Technique
Description
Applicability
(a)
Water management plan and water audits
A water management plan and water audits are part of the EMS (see BAT 1) and include:
flow diagrams and a water mass balance of the plant;
establishment of water efficiency objectives;
implementation of water optimisation techniques (e.g. control of water usage, water recycling, detection and repair of leaks).
Water audits are carried out at least once every year.
The level of detail and nature of the water management plan and water audits will generally be related to the nature, scale and complexity of the plant. It may not be applicable if the STS activity is carried out within a larger installation, provided that the water management plan and the water audits of the larger installation sufficiently cover the STS activity.
(b)
Reverse cascade rinsing
Multiple stage rinsing in which the water flows in the opposite direction to the work-pieces/substrate. It allows a high degree of rinsing with a low water consumption.
Applicable where rinsing processes are used.
(c)
Reuse and/or recycling of water
Water streams (e.g. spent rinse water, wet scrubber effluent) are reused and/or recycled, if necessary after treatment, using techniques such as ion exchange or filtration (see BAT 21). The degree of water reuse and/or recycling is limited by the water balance of the plant, the content of impurities and/or the characteristics of the water streams.
Generally applicable.
Table 4
BAT-associated environmental performance levels (BAT-AEPLs) for specific water consumption
The BAT-AEPL may not apply where the coil coating line is part of a larger manufacturing installation (e.g. steelworks) or for combilines.
Sector
Product type
Unit
BAT-AEPL(Yearly average)
Coating of vehicles
Passenger cars
m3/vehicle coated
0,5–1,3
Vans
1–2,5
Truck cabins
0,7–3
Trucks
1–5
Coil coating
Steel and/or aluminium coils
l/m2 of coated coil
0,2–1,3
Coating and printing of metal packaging
Two-piece DWI beverage cans
l/1 000 cans
90–110
The associated monitoring is given in BAT 20 (a).

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Source: https://www.legislation.gov.uk/eudn/2020/2009/annex/division/1/division/1.1/division/1.1.13/division/BAT (the official version)
Page: https://openlegislation.uk/eu-decision-2020-2009/annex/division-1/division-1.1/division-1.1.13/division-BAT
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.