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Waste Treatment Process

waste facility treatment plant

Waste Treatment Process


The facility uses state-of-the-art equipment and processes which enable operators to manage the composting process through the tracking of batches through the entire composing process for traceability. This facility provides McBreen Environmental with a secure and ethical outlet for the liquid waste it collects which enables us to continue our journey to sustainability while also contributing to the circular economy. Without this facility, the target for reduction in waste volumes going to landfill could not be achieved.

Waste Treatment Process

High-Quality Material

The key waste activity which is carried out at the McBreen Composting Facility is the dewatering and composting of biosolids from waste materials with the result a product a high-quality compost material. This process is brought about by the biological decomposition of organic/ material under controlled conditions. Due to the nature of McBreen Environmental’s waste processing activities, 99.99% of the waste generated from our business activities is recovered via discharge to sewer and composting process.

Waste Screening machine close up

Waste Treatment Process

Overview of the Key Process


Waste tankers arrive at facility (waste acceptance)

Tankers of waste material are weighed, tested and inspected upon arrival at the facility.

recycling water graphic

Dewatering of Sludge – Sludge Processing Facility

The dewatering process involves the separating of the liquid from the solids from the waste for separate treatment/disposal.

Warehouse graphic

Temporary storage of stock in preparation

The waste is unloaded into one of two over ground waste Storage tanks. The materials are then batch blended to ensure the appropriate moisture content for screening.

composting graphic

Primary composting in Bays

Each compost batch is maintained within a tunnel for 1 to 2 weeks before being transferred to the next tunnel. All air is directed through the aeration system to the Biofilter prior to its release not the local environment. All data is recorded continuously using a SCADA system.

soil graphic

Turning and primary composting in Bays

Compost is moved from one tunnel to another until it has reached a minimum temperature of 40 degrees (monitored by temperature probes).

magnifying glass on soil graphic


Each batch is removed from a tunnel and screened using a trommel. The separated oversize fraction is transferred back to the Wallow Bay and reused as structure material in the composting process.

digger on dirt graphic

Maturation and storage of the final product

The screened compost batch is transferred into Tunnel No. 4 (or No. 5 depending on availability) and held for up to 21 days. After 21 days the batch is tested, and batch remains within the tunnel until the test results confirm the batch meets appropriate specifications.

water storage tanker

All wastewater will be stored in a holding tank before being pumped to the main

Once QA checks are completed the compost is transferred offsite to the pre agreed end destination. Treated water is transferred to the outdoor Balance Tank and fed by gravity feed to the Irish Water sewer.