10.18453/rosdok_id00002094 Vogel, Telse Telse Vogel http://d-nb.info/gnd/1161756868 Universität Rostock 2018 624 Structural and Environmental Engineering 570 Life science 2018 en http://purl.uni-rostock.de/rosdok/id00002094 urn:nbn:de:gbv:28-diss2018-0088-7 Currently, new processes for recycling P from wastewater streams were developed during the last years. In one incubation experiment, two pot experiments and one two-year field experiment the P fertilizing effect of struvite, one solar dried sewage sludge, one untreated (ut) sewage sludge ash (SSA) and five different treated SSAs were analyzed in comparison to a commercial P fertilizer. The results illustrated that these recycled products are promising renewable P fertilizers, whereby struvite is suited best due to its low contamination level and its high P bioavailability.