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Chapter 7
7.2 Recommendations for future work
Quantified overview to emission and consumption levels in the OFC sector
The environmental key issues in the OFC sector are described in general in Section 1.2.
However, Chapter 3 “Current emission and consumption levels” of this document only contains
emission levels from individual reference plants and, with the exception of Figure 3.1 and Table
3.6, no concrete data or information were available to provide a more detailed overview to the
releases from the OFC sector as a whole. Future work could provide this overview.
Extending the understanding of the VOC emission situation from OFC plants
OFC production is carried out as batch manufacture in multipurpose plants but also includes
dedicated production lines for “larger” volume products with batch, semi-batch or continuous
operation. This establishes a highly variable situation and the information exchange showed that
a conventional approach to understand the VOC emissions situation can be misleading. Table
7.2 lists relevant subjects.
Subject Comment
Monitoring and interpretation
of emission levels from ducted
sources
Diffuse and fugitive emissions
Unified classification system
for VOC compounds
The high variability of emission volume flows
represents a challenge for the interpretation of emission
levels. Future work could be based on data arising from
BAT in Sections 5.2.1.1.4 and 5.2.1.1.5 about
monitoring of emission profiles and continuous
monitoring
The information exchange did not provide sufficient
information to enable an assessment of the role and
share of diffuse/fugitive emissions of the total VOC
emissions
The fact that across Europe different classification
systems for emissions to air are in use represented an
obstacle for the work on OFC when it came to the
differentiation of less and more harmful compounds.
Table 7.2: Recommendations for future work related to VOC emissions to air
Joint pretreatment platforms for OFC waste waters
The information exchange on OFC underlines the importance of the combination of
pretreatment of waste water streams and the biological waste water treatment of the total
effluent. The treatment with high pressure wet oxidation with O2 under alkaline conditions on a
joint pretreatment platform, as described in Section 4.3.7.4, offers a highly efficient and flexible
response to the challenges arising from the waste water streams created on OFC sites (see the
BAT in Section 5.2.4), especially where numerous OFC sites are located in the same region. At
the same time it offers a solution for the sludge from biological waste water treatment (see also
Table 7.3). Future work could focus on a more in depth assessment of the economic aspects of
this approach, and its comparison with individual waste water treatment strategies.
406 Dezember 2005 OFC_BREF