10.04.2019
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Wim Debeuckelaere, European Commission (EC) DG Environment, has providedan update of the EC Joint Research Centre (JRC) ?SafeManure? study,which aims to define criteria for allowing certain nitrogen fertilisers derived (wholly or partly) from manure to be not treated as "processed manure? under the Nitrates Directive.The study will include analysis and comparative testing of differentfertilisers recovered from nutrients (identified to date: 86 materials from 7 sites in Italy, 11 in the Netherlands and 1 in Denmark, coveringraw manure, solid/liquid fractions, digestate, reverse osmosis/mineralconcentrates and nitrogen salts recovered from stripping). A review ofexisting literature has identified (to date) less than 20 relevantstudies or reports, noting in particular a lack of data concerning thecomposition of processed manure products, nitrogen release kinetics,environmental and health issues and a lack of experimental evidencecomparing nitrogen leaching or plant fertiliser effectiveness ofrecycled nutrient products to mineral fertilisers. In particular,comparative trials are lacking for recovered nitrogen salts andstruvite. The project planning anticipates biogeochemical modelling and pot trials in Spring 2019, field tests in Spring andAutumn 2019 and a draft report and stakeholder workshop and 2019/early 2020.
The full list of studies already submitted to and analysed by JRC is at www.phosphorusplatform.eu/regulatory.
Source: European Sustainable Phosphorus Platform (ESPP)