environmental impact statement kilmainhamwood compost facility ...

5361- Kilmainhamwood Compost Facility Extension- EIS
Chemical scrubbing and biofiltration were deemed to be the most feasible combination of technologies
as detailed in the Alternatives section (Section 3.3).
Chemical scrubbing of an air stream is a technique widely used in many industries to remove both solid
and gaseous contaminants. The technique is essentially one of mass transfer by absorption when the
air contaminants are brought into intimate contact with a liquid solvent in which they have a high
solubility. The consumables used in the scrubbing process are water and sulphuric acid. The molecular
formula of the acid used is H2SO4. The scrubber unit will include a bunded tank for the storage of
sulphuric acid.
The existing facility is certified to International Standards for Environmental (ISO14001), Health and
Safety (OHSAS 18001) and quality (ISO9001) and operates an Integrated Management System (IMS).
In regard to the proposed scrubber unit, all safety and environmental aspects will be incorporated into
the Integrated Management System.
The by-product generated by the scrubbing process is ammonium sulphate in solution. This by-product
is regarded as a soil fertiliser (ammonium sulphate) and will be added to the composting feedstock. The
ammonium sulphate will compliment the nutrient value of the finished compost. This soil fertiliser will be
stored in a secure tank for application under controls which will be detailed in the Integrated
Management System (IMS).
The proposed inclusion of an acid scrubber combined with changes already undertaken by Thorntons
Recycling (enclosing of existing composting bays) to optimise volumes of process air requiring
treatment at the Kilmainhamwood Compost Facility are in line with Best Available Techniques (BAT) in
the industry and will ensure that the odour concentration at sensitive receptors is lower than the
accepted odour impact criterion for such facilities.
For inspection purposes only.
Consent of copyright owner required for any other use.
Proposed Agricultural Grade Compost
The existing facility is licensed to produce Class 1 compost, Class 2 compost and stabilised biowaste in
accordance with the existing waste licence (W0195-01) and its associated Technical Amendment A.
In addition to Class 1 compost, Class 2 compost and stabilised biowaste, it is proposed that the
intensified and extended Kilmainhamwood Compost facility will also be permitted to produce agricultural
grade compost as detailed in Section 2.5.8 of this EIS.
Proposed Ancillary Works
Other works required to integrate the proposed extensions to the facility buildings and the proposed
facility administration building into the existing facility will include:
� Extension to surface water drainage network
� Foul water drainage network from proposed facility administration building to the existing waste
water treatment plant
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