# Commission Implementing Decision (EU) 2018/1147 of 10 August 2018 establishing best available techniques (BAT) conclusions for waste treatment, under Directive 2010/75/EU of the European Parliament and of the Council (notified under document C(2018) 5070) (Text with EEA relevance), Division 3.2.2: Odour and diffuse emissions to air

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

BAT 37. In order to reduce diffuse emissions to air of dust, odour and bioaerosols from open-air treatment steps, BAT is to use one or both of the techniques given below.
Technique
Description
Applicability
a.
Use of semipermeable membrane covers
Active composting windrows are covered by semipermeable membranes.
Generally applicable.
b.
Adaptation of operations to the meteorological conditions
This includes techniques such as the following:
Taking into account weather conditions and forecasts when undertaking major outdoor process activities. For instance, avoiding formation or turning of windrows or piles, screening or shredding in the case of adverse meteorological conditions in terms of emissions dispersion (e.g. the wind speed is too low or too high, or the wind blows in the direction of sensitive receptors).
Orientating windrows, so that the smallest possible area of composting mass is exposed to the prevailing wind, to reduce the dispersion of pollutants from the windrow surface. The windrows and piles are preferably located at the lowest elevation within the overall site layout.
Generally applicable.

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Source: https://www.legislation.gov.uk/eudn/2018/1147/annex/division/3/division/3.2/division/3.2.2 (the official version)
Page: https://openlegislation.uk/eu-decision-2018-1147/annex/division-3/division-3.2/division-3.2.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.