VERA Test protocol Air cleaning systems

Transcription

1 VERA Test protocol Air cleaning systems Revised protocol Version 2 International VERA Committee for Air cleaners: Roland Melse, Anders Feilberg, Ewald Grimm, Jochen Hahne, Michael Jorgen Hansen, Nico Ogink, Volker Siemers

2 Aim Evaluation of air cleaning technology performance under specific, predetermined criteria and the appropriate quality assurance procedures Specification of VERA test procedures: Responsibilities of the involved test partners Essential measurement parameters for demonstrating emissions, test conditions and operational stability sampling, measurement and analysis methods additional, optional parameters requirements for contents and format of test report Balance between costs and achieved quality of verification results 2

3 History of air cleaning protocol 19/02/2015 Bonn: Decision of IVB to revise all VERA test protocols 14-15/12/2015, Cloppenburg: 1 st revision meeting 2008 First Draft and several meetings 12-13/10/2016, Braunschweig 2nd revision meeting 30/03/2017 Hanover: Bioaerosol Workshop 03/04/2009, Utrecht Stakeholder meeting 19/04/2017, Hanover: Laboratory meeting 17/09/2010 Version 1 published 20/04/2017, Hanover: Follow up IVC meeting 26/10/2017, Hanover: Stakeholder meeting 3

4 VERA experts air cleaning Denmark: Germany: Anders Feilberg, Aarhus University Michael Jørgen Hansen, Aarhus University Ewald Grimm, KTBL Jochen Hahne, Thünen Institute Volker Siemers, DLG The Netherlands: Roland Melse, WUR Nico Ogink, WUR Bioaerosol experts: - Marcus Clauss, Thünen Institute, DE - Udo Jäckel, BAUA, DE - Albert Winkel, WUR, NL - Inge Wouters, University of Utrecht, NL

5 What has been changed? 5

6 Structure Increase readability and logical structure, alignment with ISO standards High level structure (= equal in all revised VERA test protocols), some parts have been moved some new sections headers have been added more precise phrasing, tables restructured General requirements moved to General VERA Guidelines (GVG) Definition of VERA bodies Qualification of test organisations, Test processes Verification processes 6

7 The revised protocol contents No. 1-5 Scope / Abbreviations / Definitions No. 6 System description No. 7 Requirements for the actual test process Recommended pre-test, Test design: two farm locations, Sampling/ measurement strategy No. 8 Requirements for test report format, system description, data processing etc. No. 9 Bibliography Annexes - more details on: Design and operational parameters electronic monitoring nitrogen balance Agronomic recommendations Animal welfare and the air cleaning system Contents of a user manual template for a test plan Example of a contract 7

8 System description range of application: animal category and housing system; Working principle (incl. illustrations and/or diagrams of the system) dimensioning of the system (e.g. volume of packing, surface area, air loading rate per m²); components including type (e.g. material and characteristics), technical and functional description, and arrangement; essential design and operational parameters (ranges) for proper function (Annex A) key parameters to be electronically or manually logged for monitoring (Annex B); input materials needed and wastes produced; User manual (EN 82079) Detailed instructions on operation, service, maintenance and monitoring Potential risks on animal welfare, occupational health and safety, external environment Predicted durability of the system and its components Warranty provisions A list of reference units, if available.

9 Design description (example Annex A) System description Suitability (single stage trickling filter) (pig production: ammonia, particulate matter and odour reduction), slurrybased/littered system, ventilation system) Total system Unit Data Additional information Kind and weight of animals kg x Maximum animal places (AP) - x Maximum air flow (air velocity) m³/h (m/s) x Dwell time s x (total system) Specific water consumption / discharge m³/(ap year) x Maximum total pressure drop Pa x Specific acid, alkali, additive consumption m³/(ap year) x (96 % sulfuric acid) Packing Unit Data sheet Length/width/height m x Specific surface area m 2 /m 3 x Max. surface load m³/(m² h) x Max. volume load m³/(m³ h) x Sprinkling (density) m³/h (m³/(m² h)) x Volume water basin m³ x ph range - min - max Max. conductivity ms/cm x Droplet VERA eliminator Stakeholder Meeting Air cleaners Unit Hanover Data sheet

10 Electronic monitoring (informative Annex B) Parameter unit DE (depending on region) (X = obligatory) Biofilter Trickling filters, scrubbers and multistage operations Air flow m³/h X X Total pressure drop Pa X X X Total cumulative fresh water m³ X X consumption Total cumulative power kwh X X X consumption Running time of time X X sprinkling/irrigation pumps NL DK Requirements in DK will be specified by the local authority and may include some of the listed parameters Total cumulative water discharge m³ X X ph-value - X X Electric conductivity ms/cm X X Raw gas temperature C X X Outside temperature C X X Clean gas temperature C X

11 Sampling general Sampling period Test location A 8 consecutive weeks summer conditions 8 consecutive weeks winter conditions. For tests in broilers: 2 batches, with measurements for 4 weeks at the end of eachbatch Aim is to test minimum and maximum conditions Test location B Identical to location A. Summer conditions: Ventilation rate for the animal house must be > 80% of the maximum dimensioned ventilation rate per animal for at least 3 h per day for 50% of all the measurement days within the 8 weeks testing period Winter conditions: Ventilation rate for the animal house shall be low and below 30 % of maximum ventilation rate per animal for at least 3 h per day for 50% of all the measurement days within the 8 weeks testing period. For partial air cleaning and for poultry production individual sampling conditions for that specific case have to be defined in the test plan. A minimum of two month interval in between the summer and winter measurements is required. Sampling points Simultaneous sampling of inlet and outlet air. Identical to location A.

12 Ammonia Test location A: o 24 hours continuous sampling once a week during each of the two 8 week periods. o For N balance: 2 week continuous NH 3 measurement within each of the two 8 week periods in times with highest loads. Test location B: o Identical to location A but measurements on only 4 days during the 8 weeks winter period and 6 days during the 8 weeks summer period. o Measurement days equally spread over the 8 weeks period. o In broilers: at least one sampling during the last week of the production cycle. Gas detection tubes: generally not allowed (only for indicative measurements). For N balance: online measurements The measurement method shall be the same for inlet and outlet air

13 N balance 2 weeks for biofilters: 4 weeks) online gas (NH 3, NO X, N 2 O) and volumetric flow measurements (gas and liquid). Water analyses (test location A): During the 2 week continuous NH 3 measurements. NOx and N 2 O: not necessary for acid scrubbers. For multistage scrubber systems only the total N balance is required and not for the individual steps. The step of biofiltering with organic filling material should not be included in the balancing

14 Odour Minimum number and distribution of sampling days: o Test location A: Weekly with 2 sets of samples per day. o Test location B: 4 days during the 8 weeks winter period and 6 days during the 8 weeks summer period. Sampling days equally spread over the 8 weeks period with at least one sampling during the first week and one sampling during the last week. Sampling between 9 am and 4 pm, Minimum 30 minutes, Cross section of air outlets Sampling equipment and time: according to the EN Odour characteristics (optional) Olfactometry according to EN Parameters to be measured during the measurement days: air volume flow (simultaneously und continuously with a measurement frequency < 5 min) Temperature humidity (before & after the air cleaner) must be >90 % in clean gas to prove proper function of system. ph of discharged water (at least once a week).

15 Dust Only on Test location A required. Measurement of PM2.5 is optional. Minimum number and distribution of sampling days for Total dust and PM10: two sets of samples in each of the 8-weeks-periods. Sampling days should be in different weeks. isokinetic sampling or the air speed below 2 m/s. Sampling time shall be adjusted to provide detectable mass of particles. As a guideline: between 30 min and 24 hours. For short measurements, sampling shall be between 9 am and 4 pm Each sampling day use at least two sets of samples either consecutive or in parallel. Sampling location: based on air velocity and homogeneity Gravimetric methods (EN 13284, EN 12341, EN 481, VDI 2066 Blatt 1 to Blatt 7 and Blatt 10)

16 Operational stability Operational stability of the air cleaning system must be sufficient as it is a verification item Verified by Electronic logging of relevant parameters Water analyses once a week with ph electric conductivity, NH 4 -N, NO 2 -N and NO 3 -N (within 8 week periods).

17 Test conditions - parameters Mandatory: Ventilation rate Number of animals animal occupation rate: %. Temperature, relative humidity Pressure loss Consumption of energy, chemicals Discharge liquid (amount, ph, conductivity, NH3, NO2, NO3) Management (Empting of pits, cleaning, dunging, feeding) Optional: Noise NH 3 at animal level CO 2 CH 4 H 2 S Biological systems: NOx, N 2 0

18 Test report Requirements on test report: Emission reduction: working principle Housing and management system, test sites Conformity of measurement methods to test protocol Calculation and statistical methods Plausibility of measurements, measurement uncertainty, calibration of instruments Deviations from test protocol allowed if well documented: Protocol: ammonia, odour and dust emissions required No expected effect (both reduction or increase in emissions), measurements not needed

19 Thanks for your attention. Any questions? Roland W. Melse, PhD Wageningen University & Research, Netherlands - Phone: