# Commission Implementing Decision (EU) 2019/2031 of 12 November 2019 establishing best available techniques (BAT) conclusions for the food, drink and milk industries, under Directive 2010/75/EU of the European Parliament and of the Council (notified under document C(2019) 7989) (Text with EEA relevance), Division 10.4: Hexane losses

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

BAT 32. In order to reduce the hexane losses from oilseed processing and refining, BAT is to use all of the techniques given below.
Technique
Description
(a)
Countercurrent flow of meal and steam in the desolventiser-toaster
Hexane is removed from the hexane-laden meal in a desolventiser-toaster, involving a countercurrent flow of steam and meal.
(b)
Evaporation from the oil/hexane mixture
Hexane is removed from the oil/hexane mixture using evaporators. The vapours from the desolventiser-toaster (steam/hexane mixture) are used to provide thermal energy in the first stage of the evaporation.
(c)
Condensation in combination with a mineral oil wet scrubber
Hexane vapours are cooled to below their dew point so that they condense. Uncondensed hexane is absorbed in a scrubber using mineral oil as a scrubbing liquid for subsequent recovery.
(d)
Gravitational phase separation in combination with distillation
Undissolved hexane is separated from the aqueous phase by means of a gravitational phase separator. Any residual hexane is distilled off by heating the aqueous phase to approximately 80-95 °C.
Table 22
BAT-associated emission levels (BAT-AELs) for hexane losses from oilseed processing and refining
Parameter
Type of seeds or beans processed
Unit
BAT-AEL(yearly average)
Hexane losses
Soybeans
kg/tonne of seeds or beans processed
0,3-0,55
Rapeseeds and sunflower seeds
0,2-0,7

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Source: https://www.legislation.gov.uk/eudn/2019/2031/annex/division/10/division/10.4 (the official version)
Page: https://openlegislation.uk/eu-decision-2019-2031/annex/division-10/division-10.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.