Official standards required to produce our compost
Under a permit from the Environment Agency we take organic waste products such as green garden waste (trees, grass clippings etc.), fruit & vegetable waste, straw, stable waste paper & card… basically anything of organic make up that is not covered by the ABPR (Animal By-Product) Regulations - which include meat, fish, dairy products and any other cooked food wastes. This is then turned into a nutrient rich soil improver (compost) for use in agriculture, horticulture, landscaping or gardening, professional or amateur.
On arrival the material is checked for excess contamination- (plastic, metal, excessive odours or liquids etc.).
If found, the load will be rejected and sent for re-sorting or disposal at a suitable site elsewhere.
The accepted loads are then weighed on our state of the art weighbridge and deposited in the correct area of the site.
The mix of materials are then shredded and blended to get the correct moisture levels (approx 55% moisture) and carbon & nitrogen ratio ( approx 30:1) to ensure odour levels are kept to a minimum and to encourage good microbial activity. The material is then formed into windrows – approx 50mtrs long, 6mtrs wide & 3mtrs high. Over a period of at least 8 weeks the windrows will be turned a minimum of 4 times, twice during the first 2 weeks, as this will introduce crucial air and oxygen needed in the early stages to stop them going anaerobic and odouress. The temperatures are checked daily and must be kept between 55 & 80 degrees to ensure the material is fully sterilised and sanitised by the end of the 8 weeks. The pathogens are sterilised at the higher temperatures of the process but as the temperature changes the species of microbes change too, between mesospheric (lower temps) and thermophilic (higher temps). Most of these will die as it changes and become part of the material that is being broken down. As the easily broken down material is used up, the temperatures will stabilise and start to mature.
The material is then screened down to size and to remove any contamination that may have passed through. Any oversized material is re-composted.
Here we screen to 25mm for bulk agricultural use, 10mm for horticulture, soft landscaping/gardening use and 4mm for potting/turf dressing.
It is then ready to be used, though it will still hold some heat (this can be effective if used in agriculture), but if it is left to mature over a matter of months it will cool down as microbial activity slows down.
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