environmental impact statement kilmainhamwood compost facility ...

5361- Kilmainhamwood Compost Facility Extension- EIS
The 12-40mm fraction (seed compost) produced by the screening process is moved to the beginning of
the process where it is mixed with incoming feedstock to adjust the porosity, moisture content and C:N
ratio of the blended mix. The plus 40mm fraction primarily comprises of plastic film and other large
contaminants and is hence stored for dispatch from the facility to a licensed facility for
recovery/disposal.
It is proposed that approximately 8,280 tonnes per annum of finished product and approximately 1,625
tonnes per annum of residual waste will be generated by the extended and intensified Kilmainhamwood
facility. Given that the process proposed for the additional feedstock is the same as the existing
process, it is reasonable that the mass balance for the extended and intensified facility is based on the
mass balance for the existing facility.
Process losses are due to a combination of reductions in dry matter content and moisture content. The
microbial activity in the process consumes carbon, as an energy source, and releases carbon dioxide
and heat. The heat generated results in the evaporation of moisture within the feedstock. In summary,
the process losses are represented in terms of carbon dioxide and water vapour emissions at the
biofilter. Process losses in excess of 60% are typical of a well managed in-vessel composting process.
A flow diagram of the process at Kilmainhamwood Compost is provided below. On the basis of the data
compiled for the existing process, losses have been approximated for the treatment of 40,000 tonnes
per annum and are included in the flow diagram below.
For inspection purposes only.
Consent of copyright owner required for any other use.
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EPA Export 01-06-2010:03:55:51