# 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 3.1.2: Emissions to air

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

BAT 34. In order to reduce channelled emissions to air of dust, organic compounds and odorous compounds, including H2S and NH3, BAT is to use one or a combination of the techniques given below.
Technique
Description
a.
Adsorption
See Section 6.1.
b.
Biofilter
See Section 6.1.
A pretreatment of the waste gas before the biofilter (e.g. with a water or acid scrubber) may be needed in the case of a high NH3 content (e.g. 5-40 mg/Nm3) in order to control the media pH and to limit the formation of N2O in the biofilter.
Some other odorous compounds (e.g. mercaptans, H2S) can cause acidification of the biofilter media and necessitate the use of a water or alkaline scrubber for pretreatment of the waste gas before the biofilter.
c.
Fabric filter
See Section 6.1. The fabric filter is used in the case of mechanical biological treatment of waste.
d.
Thermal oxidation
See Section 6.1.
e.
Wet scrubbing
See Section 6.1. Water, acid or alkaline scrubbers are used in combination with a biofilter, thermal oxidation or adsorption on activated carbon.
Table 6.7
BAT-associated emission levels (BAT-AELs) for channelled NH3, odour, dust and TVOC emissions to air from the biological treatment of waste
Either the BAT-AEL for NH3 or the BAT-AEL for the odour concentration applies.
This BAT-AEL does not apply to the treatment of waste mainly composed of manure.
The lower end of the range can be achieved by using thermal oxidation.
Parameter
Unit
BAT-AEL(Average over the sampling period)
Waste treatment process
NH3
mg/Nm3
0,3-20
All biological treatments of waste
Odour concentration
ouE/Nm3
200-1 000
Dust
mg/Nm3
2-5
Mechanical biological treatment of waste
TVOC
mg/Nm3
5-40
The associated monitoring is given in BAT 8.

---
Source: https://www.legislation.gov.uk/eudn/2018/1147/annex/division/3/division/3.1/division/3.1.2 (the official version)
Page: https://openlegislation.uk/eu-decision-2018-1147/annex/division-3/division-3.1/division-3.1.2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.