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Cowbridge Compost
The Process
At Cowbridge Compost we use the in-vessel method of compost production.

1) Waste is delivered onto site by collection vehicles. Our own weighbridge ensures the correct recording of all loads delivered. The recorded waste is transported to our sorting area and inspected for contaminants which are removed and recycled in the correct manner. The load vehicle is then cleaned and returned to the weighbridge for sign out.

2) The waste is front loaded into the shredder and mixed together with pre-shredded green waste. Until such time when there is enough to fill one bunker, this material is held in the holding area. When ready, each full bunker is allocated a batch number under the Defra regulations.

3) When the waste is 'in bunker' a temperature probe is inserted into the waste (each of these probes has its own serial number and position in the bunker). Four temperature probes are inserted into each bunker's contents, two short and two long. Every day the the results from the probes are read remotely and plotted on graphs, which are recorded on paper and electronically for future referral and any anomalies are investigated and corrected.


The waste is moved from one bunker to the next in line every four days. It is moved down the line to bunker nine where the 1st stage of composting is completed. During this process all Defra regulations are strictly adhered to. As each bunker is loaded, a plastic barrier is fixed on the front of each bunker to stop cross contamination.

5) From the in-vessel building the compost will be windrowed. The batches will be marked with wooden stakes and the windrows will be turned once the compost is in this area where it remains for 50 days undergoing regular EA temperature testing. All data will be available for EA checks.

6) The last process is that of maturing the compost for use on the Estate under the release requirement to farm land by Defra or bulk bagging off site. This is done in windrows. There will be batch markers on the windrows to have a complete record of movement of waste and compost on site for EA and Defra.
Association for Organics Recycling
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