Quality Compost

Research has been conducted to continue to develop the market for quality composts.  This includes an assessment of the current compost stability test methods for production. 

Compost stability: Impact and assessment

The British Standards Institution Publically Available Specification 100 (BSI PAS 100) for composted materials was first introduced in 2002, when the majority of composting sites were processing green waste in open windrow systems. Since then a shift in the type of compost feedstocks as well as processing conditions has been observed. The use of in-vessel composting technologies (IVC) has increased significantly in the UK as processing food waste has become more common. Factors such as feedstock type, specific operating (or process) conditions of the in-vessel stage, as well as the subsequent stabilisation and maturation stages, may influence the effectiveness of the composting process, and hence the stability of the end product. This industry shift raises the question as to whether the current UK compost stability test method (ORG0020), as well as the compost stability limit prescribed by PAS 100, are still meaningful.

Click on the links on the right to read the report and accompanying literature review.