environmental impact statement kilmainhamwood compost facility ...

5361- Kilmainhamwood Compost Facility Extension- EIS
Process Flow Diagram for Kilmainhamwood Compost Facility
Recirculation
of Oversize
Materials
The incoming feedstock, derived from commercial and domestic biowaste, will contain sufficient
moisture to sustain the composting process. As a result, water usage is only required for the washing of
trailers, equipment and floors. Water for washing will be utilised from the rainwater storage tank, the
composting process will not place any demand on the onsite borehole. The facility building is fully
bunded and therefore all waters from washing activities are contained and incorporated back into the
composting process. The proposed extensions to the facility building will also be fully bunded. There
will be no wash water or leachate transported out of the facility for treatment.
2.5.5 Composting Process Parameters
Incoming Feedstock
(40,000 tpa)
Composting
Process
Screening of
Materials
ABP Treatment
Finished Compost
Material (8,280 tpa)
For inspection purposes only.
Consent of copyright owner required for any other use.
Important parameters which affect the composting process are temperature, moisture, oxygen,
substrate availability and C:N ratio.
Temperature
Micro-organism activity during composting releases large amounts of energy in the form of heat.
Temperature can vary from ambient temperature to greater than 70 o C. As temperature is the controlled
variable, effective monitoring is necessary. Temperature is monitored by means of temperature probes
and the automated process control system with feedback to a computerised system in the facility
manager’s office. Temperatures are maintained during the initial composting phase at 60 o C so that the
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Moisture Losses
(19,057 tpa)
Dry Matter Losses
(11,038 tpa)
Residual Fraction
(1,625 tpa)
EPA Export 01-06-2010:03:55:51