Alternative Processing Strategies for Verge and Clippings to Contribute to the Climate Goals

A study on how alternative processing strategies contribute to the climate goals set by the Dutch government

Verge and ditch clippings are a biomass released during the mowing maintenance carried out by the water boards in the Netherlands to ensure the functioning of the water system. The clippings are currently composted or left on the banks of watercourses; however, this does not align with the climate goals of the Dutch government to reduce CO2 emissions and create a circular economy. This study aims to collect data on verge and ditch clippings, identify alternative processing strategies for clippings, and determine how these strategies contribute to the climate goals set by the Dutch government.

To gather data on verge and ditch clippings and alternative processing strategies, a literature review was carried out first. Hereafter, three alternative processing strategies were selected to determine their contribution to climate goals. An analysis was carried out through a literature review and interviews with field experts. Accordingly, CO2 emissions were calculated for the end products and the corresponding currently applied product. The results demonstrate that the clippings released through mowing are a high-quality product that can replace less sustainable and/or fossil-based products. However, the current regulations do not yet allow this to be executed without a permit.

The study presents that there are at least fourteen alternative processing strategies for clippings that can be applied. In addition, the result of the analysis of three selected strategies indicates that by applying these processing strategies, the water boards could contribute to a considerable reduction in CO2 emissions and the creation of a circular economy. Based on that, it is recommended that water boards start applying alternative processing strategies for clippings. In addition, it is recommended that the Dutch government review its laws and regulations concerning the reuse and processing of green waste streams and adjust the policy to make reusing and recycling clippings more accessible. Further research is needed to address the technical and practical feasibility of alternative processing strategies for clippings. Moreover, further research is required to determine which alternative processing strategy for clippings contributes most to the climate goals.