Glanbia Fresh Pork Limited IPPC Review Documentation 9260n 00024 December 2005 Attachment NO' El (including E.l .A, E.l .B) Emissions to Atmosphere Doc. Nr. B9260-N-R-01-B For inspection purposes only. Consent of copyright owner required for any other use. EPA Export 25-07-2013:18:08:04
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Attachment NO' El - Environmental Protection Agency, … NO, Particulates CO The results of the air dispersion modelling exercise were compared with the Air Quality Standards Regulations,
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Glanbia Fresh Pork Limited 9260n00024 IPPC Review Documentation December ZOO5
E.l.A Provide a summary of the emission points, together with maps and / or drawings and supporting documentation.
Background
The boiler, main and minor point emissions to atmosphere £torn Glanbia are as follows:
J New Boiler Stack, A1-2; J Original Boiler Stack, A1 - 1 ; J Odour Control Unit Stack, A2-I; J Vent from Blood Storage Tank, and
J General Extract
Tables E.l (i) - (ii) inclusive have been completed in the application form detailing all point emissions to
atmosphere.
Supporting Drawings:
Drawings E. I. I(A) Emissions to Atmospl~ere depicts the locations of the boiler and main emission points at the
facility. Drawings A953 Proposed Elevations of Boiler Stack and E.l.I(B) Odozir Control unit at Waste Water
Treatment Plant identify the elevations and the relevant roof heights of the boiler and odour control unit stacks.
Boiler Emissions to Atmosphere (Combustion Gases):
There are currently two boilers on-site. The boilers are used for the generation of process hot water
requirements. The new boiler, boiler A1-2 was installed and commissioned in 2004 while the original boiler,
A1 - 1 has been in operation since 199 1. It should be noted that only one boiler will be operated at a time with the
original boiler (A1-1) hnctioning as a standby. The boiler output of Al-1 is 3,500 kglhour and the output of the
new boiler (Al-2) is 6,800 kglhour with a rated thermal'input (nett) of 4.8 MW.
A 1 -2 - Main Boiler
Boiler A1-2 is a Cochran thermax stream boiler. A1-2 is located at approximately 3 m from Al-l (which is
located in the boiler house), grid reference 263373E, 233567N. Boiler A1-2 runs on light fie1 oil and the boiler stack has a diameter of 560rnm and is 15 m above ground. The boiler has a steam output.of 6,800 kglhr and.
produces 650 rng /~m3 ofNOx and operates at a temperature of 254 "C.
S.I. 394 of 2004:
With regard to Schedule I of S.I. 394 of 2004, the following listed substances are emitted fi-om the boiler stacks
a vicinity and provide adequate abatement measures if required. Potential odour sources were identified from a
site visit and were agreed by the Agency. These odour sources were used to construct the bases of the modelling
assessments. Odour rates/fluxes were calculated from site specific olfactometric data.
Bord na M6na installed a MdnaShell odour abatement system (emission point grid reference 263294E,
233497N) to minimise odours and reduce total sulphur compounds. It was commissioned in the summer of
2004. The unit is located adjacent to the balance tank in the waste water treatment plant. The odour control unit
extracts air from the headspace of the covered balance tank and the headspace of the covered dewatered sludge
holding tank. This air stream is sent through a calcareous shell media to minimise contaminants prior to release
through a stack. A detailed specification of this unit is included hereunder:
Process Description
Bio-oxidation of TRS compounds as a result of a combination of physical and bio-chemical processes:
1. Adsorption and absorption of the contaminants onto the packing and into the surrounding aqueous phase; and
2. Enhanced biological degradation of the sulphide compounds by micro-organisms particular to the M6naShell system and neutralisation of the microbial by-products by the unique nature of the packing.
Description of Specialised Filter Media
The shell media employed is selected and graded according to: Size, Shape, Calcium carbonate concentration and Density.
The shape of the media is ideal for highly efficient mass transfer of contaminants. In addition a large particle size is selected (typically 30mm-70mm) which gives an extremely low backpressure across the bed. The filter media is packed randomly and performs the following functions:
1. Acts as a carrier substrate for micro-organisms 2. Provides a supplementary nourishment for micro-organisms 3. Supports humidity stores 4. Provides adsorption surface for odorous 'components 5. Maintains Optimum pH. ,
Due to background odours from irrigation water, these usually account for 50-100 odm3 at the outlet.
BAT Guidance Limits
After abatement, the odour produced at the waste water treatment plant is within the BAT Guidance Notes
limits. The BAT Guidance Limit for odour is set at 5 0uE/m3 as a 98 percentile of hourly average concentration
at the nearest odour sensitive receptor. However, the dispersion modelling completed has produced an odour
abatement system that was designed and commissioned to achieve an odour contribution of 3 O E U / ~ ~ as a 98
percentile at the nearest odour sensitive receptor. Therefore all odour emissions from the odour control unit,
A2-1 are within the BAT Guidance Limits of 5 0u/m3.
Minor Emissions
General Extract
The general extract removes air from the slaughtering, evisceration and deboning areas, the emissions from which are considered as insignificant.
E.l.B Fugitive and Potential Emissions
Fugitive and Potential Emissions
Sources and Control of Fugitive Emissions
Leaks from Valves, Pumps Seals and Flanges
Valve seals, pump seals and flanges are included in the scheduled maintenance and inspection programme - refrigeration systems.
Dust Emissionsfiom Solids Stored in the Open
No dusts are stored in the open
Loading and Unloading Operations
Slight particulate emissions may also occur during offloading of animals, and movement of vehicles within the
site.
Cleaning Operations
Slight emissions of particulates and water vapour may occur during cleaning of the yard.
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Glanbia Fresh Pork Limited 9260n00024 IPPC Review Documentation December 2005
Emissionsfrom the Waste Water Treatment Plant
Emissions from the waste water treatment plant are predominantly water vapour. Odour emissions from the
balancing tank and the sludge dewatered holding tank are controlled by the odour abatement system as specified
above.
Control of Nuisance 08-Site
As part of the preparatory works conducted by Bord na M6na Environmental Limited an odour monitoring
survey was carried out on 1.5'~ and 22nd August 2003 and included all the sources considered to be or have the
potential to be significant from an odour perspective. This list was approved by the Agency and included the
following sources;
Potential sources of odour include:
Lairage;
Sump;
Return fi-om Sludge PressIClarifier Sump;
Sludge Return Tank;
Dewatered Sludge Holding Tank;
Sludge Dewatering Building;
DAF Plant;
Balancing Tank;
Aeration Tank;
Gravity Settling Sludge Thickening Tank;
Blood Tank; and
Singe Stack.
Analysis of both the results and the odour emission rates for each of the sources was undertaken and inficated
that abatement for some of the odour sources was required. The Dewatered Sludge Holding Tank was
determined to be the largest potential on-site source of odour. From previous experience, Glanbia personnel
indicated that the Balance Tank was also a significant potential source of oclour. As a precautionary measure,
the odour control unit was installed and commissioned on-site to be-capable to extract the headspace air from
both the Dewatered Sludge Holding Tank, the Balance Tank and from the Sludge Dewatering Building.
The remainder of the list of potential sources as outlined above were not considered significant sources of odour
having regard to significant impact beyond the site boundary. Odour from these locations is anticipated to be
immediately localised to the source and not to present a significant contribution to odour levels detected beyond
the site boundary.
Council Directive 199911 3 E C
With regard to hgitive and potential emissions, there are no activities conducted on-site listed in the Schedule of
Council Directive 199911 3EC.
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1. READ THIS M W I N G IN CONJUNCTlON ml ALL OTHER RELEVANT I DRAWINGS & SPECIFICATIONS. 2. E.G.PETIIT MUST BE INFORMED IMMU)IATELY OF ANY DISCREPANCIES
BETWEEN DRAWINGS/CONTRACT DOCUMENlS AND SilE CONDmONS PRIOR TO COMMENCEMENT OF WORKS.
3. AU DIMDUSIONS ARE IN M I W M m E S UNLESS NOTED OTHERWISE. *, A l l LEVELS ARE IN METRES UNLESS NOTED OTHERWISE
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