Revised Best Available Techniques (BAT) Reference Document for

Transcription

1 Revised Best Available Techniques (BAT) Reference Document for Common Waste Water and Waste Gas Treatment/Management Systems in the Chemical Sector (CWW BREF) Final Draft for the opinion of the IED Article 13 forum 1

2 Outline of the presentation Scope of the CWW BREF Overview of the CWW BREF review process Structure of the revised CWW BREF Main changes in the revised CWW BREF Key features of the BAT conclusions Comments received from IED Article 13 forum members on the Final Draft of the revised CWW BREF Issues proposed for discussion 2

3 Scope of the CWW BREF The BREF concerns the activities specified in Sections 4 and 6.11 of Annex I to Directive 2010/75/EU, namely: 4 Chemical industry; 6.11 Independently operated treatment of waste water not covered by Council Directive 91/271/EEC and discharged by an installation undertaking activities covered under 4 above. 3

4 Issues covered by the CWW BREF Environmental management systems (EMS) Water saving Waste water management, collection, and treatment (including the combined treatment of waste water from different origins if the main pollutant load originates from the chemical industry) Waste management Treatment of waste water sludge with the exception of incineration Waste gas management, collection, and treatment Flaring Diffuse VOC emissions to air Odour emissions Noise emissions 4

5 Overview of the CWW BREF review process (1/2) Main steps Date TWG reactivation November 2007 Call for wishes January 2008 Kick-off meeting June 2008 Collection of information (deadline) February 2009 Draft 1 September 2009 Commenting period, 1055 comments (deadline) November 2009 First subgroup meeting on questionnaire analysis January 2010 Second subgroup meeting on questionnaire analysis June

6 Overview of the CWW BREF review process (2/2) Main steps Date Draft 2 July 2011 Commenting period, 998 comments (deadline) October 2011 Third subgroup meeting on questionnaire analysis April 2012 Additional targeted data collection (deadline) January 2013 Final TWG meeting December 2013 Revised draft after final meeting April 2014 Final Draft for the opinion of the IED Article 13 forum July

7 Data collection for the revised CWW BREF Two data collections via questionnaires on final waste water treatment plants (WWTPs): 2008 and 2012/2013: 107 sites from 13 EU Member States 95 sites with direct discharge (89%) 12 sites with indirect discharge (11%) Of the 95 directly discharging WWTPs: 60 % mainly organic production, 16 % mainly inorganic production, 23 % both Waste water volumes treated: m 3 /yr; population equivalents 7

8 Structure of the revised CWW BREF Preface Scope Chapter 1 General information Chapter 2 Current emission and consumption levels of WWTPs Chapter 3 Techniques to consider in the determination of BAT Chapter 4 BAT conclusions Chapter 5 Emerging techniques Chapter 6 Concluding remarks and recommendations for future work References Glossary and Annexes 8

9 Main changes in the revised CWW BREF A general update of the document New section on environmental relevance of the chemical industry in Chapter 1 New Chapter 2 with emission data from WWTPs and information on analytical parameters Several new or thoroughly revised sections in Chapter 3, e.g. on conventions, waste water management, monitoring, diffuse VOC emissions, odour emissions, several end-of-pipe techniques for waste water and waste gas treatment BAT conclusions in line with IED requirements 9

10 Structure of the BAT conclusions Scope, general considerations, definitions 4.1 Environmental Management Systems (EMS) 4.2 Monitoring 4.3 Emissions to water 4.4 Waste 4.5 Emissions to air 4.6 Descriptions of techniques 10

11 Key features of the BAT conclusions A total of 23 BAT conclusions set for the whole chemical industry 2 BAT conclusions on EMS, 4 on monitoring, 6 on emissions to water, 2 on waste, and 9 on emissions to air Horizontal topics covered: environmental management systems, odour, noise Several BAT-AELs for emissions to water No BAT-AELs for emissions to air 11

12 Key features of the BAT-AELs for emissions to water Cover the whole chemical industry Sum parameters: TOC/COD, TSS, AOX Metals: Cu, Cr, Ni, Zn Nutrients: TN/N inorg, TP Expressed as yearly averages of 24-h composite samples Apply when a certain annual pollutant load is exceeded General BAT-AEL ranges for TOC/COD and TN/N inorg, which are complemented by additional wider ranges that apply under certain conditions (e.g. abatement efficiency, good performance of biological treatment) Specific exceptions for a few production processes in the case of TOC/COD, TSS, AOX, and metals Some more generic exceptions for TN/N inorg and metals 12

13 Degree of consensus High degree of consensus Five split views accepted and recorded in Chapter 6 13

14 Comments of the IED Article 13 forum on the Final Draft TOTAL Considered consensual Considered consensual subject to certain amendments Considered as representing the views of certain members MS (AT, BE, BG, CZ, DE, DK, NL, PT, SE, UK), CEFIC, EEB

15 Issues proposed for discussion (1/2) BAT 5. BAT is to periodically monitor diffuse VOC emissions to air from relevant sources by using all of the techniques given below. I. sniffing methods ( ); II. optical gas imaging techniques; III. calculation of emissions For installations where large amounts of VOCs are handled, the three techniques are complementary. The screening and quantification of emissions from the installation by periodic campaigns with optical absorptionbased techniques, such as Differential absorption light detection and ranging (DIAL) or Solar occultation flux (SOF), is a useful complementary technique to the techniques I to III. Applicability AT (#22), PT (#24), CEFIC (#25): Replace by 'any' or 'one or a combination' DK (#23): Delete CEFIC (#25): Replace by 'may be' The applicability might be restricted depending on the nature, scale and complexity of the installation. 15

16 Issues proposed for discussion (2/2) Table 4.3: BAT-AELs for direct discharges to a receiving water body (AOX and metals) Parameter Zinc (expressed as Zn) BAT-AEL (yearly average) µg/l ( 3 )( 4 )( 5 ) Conditions The BAT-AEL applies if the emission exceeds 30 kg/yr. CZ (#35), DE (#36), CEFIC (#37): Add a footnote to the BAT-AEL for zinc (Zn) in Table 4.3: 'This BAT-AEL may not apply when the main pollutant load originates from the production of viscose fibres.' 16

17 Rewording of BAT 5 (1/2) BAT 5. BAT is to periodically monitor diffuse VOC emissions to air from relevant sources by using all an appropriate combination of the techniques I-III given below, or, where large amounts of VOCs are handled, all of the techniques I-III. I. sniffing methods ( ); II. optical gas imaging techniques; III. calculation of emissions based on emission factors, periodically validated by measurements (e.g. once every two years). For installations where large amounts of VOCs are handled, the three techniques are complementary. 17

18 ( / ) Rewording of BAT 5 (2/2) Where large amounts of VOCs are handled, the screening and quantification of emissions from the installation by periodic campaigns with optical absorption-based techniques, such as Differential absorption light detection and ranging (DIAL) or Solar occultation flux (SOF), is a useful complementary technique to the techniques I to III. Description See Section Applicability The applicability might be restricted depending on the nature, scale and complexity of the installation. 18