ISWA Soils Project

Soils are an endangered ecosystem globally and there is currently great interest in reducing erosion and improving the organic matter content of soils.

ISWA's Soils Project aims at ‘quantifying the benefit of organic matter in compost and digestate when applied to soils’ takes a lead in providing robust evidence base to link waste management and soil enhancement/improvement.

The project reports summarize current knowledge about the fate of recycled carbon in soils, in particular, its sequestration and effects on soils by talking about key areas of the world where threats to soils are severe and could benefit from organic matter inputs.

These reports will also provide a tool for waste planners/managers and farmers, summarising how composting and anaerobic digestion can be used in different country situations, and how quality assured products can be usefully applied to soils.

To download the reports, click on the links in the Reports section below.


The launch of the reports has been accompanied by a set of corresponding webinars.

Global Assessment of Municipal Organic Waste

The first in the webinar series took place on the 6th May, 2020 and presented the first of the 4 reports investigating the benefits of compost and anaerobic digestate on soil. Discussions also focused on policy and the important link between waste management and soil/agriculture. The webinar extended the boundaries of typical waste management discussions by including agriculture and land management.


If you missed it, you can watch the recording below.




Benefits of Compost and Anaerobic Digestate

The second webinar of the series took place on June 10th 2020 and was presented by the Chair and Vice-Chair of ISWA's Working Group on Biological Treatment of Waste (WGBTW) respectively Marco Ricci-Jürgensen and Jane Gilbert.


If you missed it, you can watch the recording below.





Global Assessment of Municipal Organic Waste


Benefits of Compost and Anaerobic Digestate


Summary of the State of Soils in Five Countries