Characterisation of recycled fertilisers from dry toilet contents - analysis of nutrients, hygiene and harmful substances

In the context of the project zirkulierBAR (Intermunicipal acceptance for sustainable value added from separately collected sanitary streams – from linear sanitation to circular nutrient recycling), a total of 11 composts were subjected to analysis in accordance with the specifications set forth in DIN SPEC 91421:2020-12. The objective was to ascertain the quality of recycling products derived from dry toilets for utilisation in horticulture. The analysis encompassed an assessment of the nutrient content, hygiene parameters and pollutants present, including heavy metals, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), perfluorinated tensides (PFTs) and pharmaceutical residues. In order to identify potential discrepancies between laboratories, the composts were subjected to parallel analysis by two different project participants with regard to standard parameters, nutrient content, trace elements and heavy metals. The analysis of hygiene parameters and pollutants was conducted by external laboratories.
It should be noted that the data set does not include information regarding the composting process.
The goal of the data set is to expand the database on composts containing human faeces, thereby providing a basis for classifying the recycling route and promoting acceptance of circular use in order to preserve nutrients.

在zirkulierBAR项目（关于分别收集卫生流中可持续增值的跨市认可——从线性卫生到循环营养回收）的背景下，共计11种堆肥按照DIN SPEC 91421:2020-12所规定的规范进行了分析。该项目旨在确认干式厕所回收产品在园艺应用中的质量。分析内容涵盖了营养成分、卫生参数以及重金属、多环芳烃（PAHs）、多氯联苯（PCBs）、全氟辛基磺酸盐（PFTs）和药物残留等污染物的评估。为了识别实验室之间可能存在的差异，参与项目的两位不同成员对标准参数、营养成分、微量元素和重金属进行了并行分析。卫生参数和污染物的分析则由外部实验室执行。需要注意的是，该数据集未包含关于堆肥化过程的信息。数据集的目标是扩展包含人粪的堆肥数据库，从而为分类回收路线和促进循环使用以保留营养提供依据。