Journalartikel

Jahr der Veröffentlichung: 2019

Seiten: 2469-2481

Zeitschrift: Communications in Soil Science and Plant Analysis

Bandnummer: 50

Heftnummer: 19

ISSN: 0010-3624

eISSN: 1532-2416

DOI Link: https://doi.org/10.1080/00103624.2019.1667373

Verlag: Taylor and Francis Group

Abstract: 
Phosphorus (P) recycling from sewage sludge for agricultural needs has to meet requirements for agricultural implementation, such as short and long-term P-plant-availability under field conditions. Field experiments often bring no evaluable results, because agricultural soils got a high potential of P-supply even if they are classified as low in P-supply according to the CAL extraction method. The present study presents a possible way to investigate the P-plant-availability of P-recycling-fertilizers under field-like conditions. The plant experiments are firstly performed in small Mitscherlich pots in growth chambers and subsequently in containers with a high soil volume of 170 kg under greenhouse conditions, in which plants can grow until ripening. The tested P-recycling-fertilizers were produced from sewage sludge in a large-scale thermal process. It was a two-step treatment process performed with a pyrolysis of sewage sludge at 550 degrees C (SSC-550) and a subsequent thermochemical post-treatment at 950 degrees C with Na2SO4 (SSA-Na) and HCl + Na2SO4 (SSA-HCl/Na) as additives. The results show, that the P-recycling-products from pyrolysis got an adequate long-term but a 65% lower short-term P-plant-availability compared to triple-superphosphate. SSA-Na and SSA-HCl/Na show both a high short and long-term P-plant-availability comparable to triple-superphosphate. This can be explained by their highly plant-available P-compound CaNaPO4.

Harvard-Zitierstil: Steckenmesser, D., Vogel, C. and Steffens, D. (2019) Medium-scale Plant Experiment of Sewage Sludge-based Phosphorus Fertilizers from Large-scale Thermal Processing, Communications in Soil Science and Plant Analysis, 50(19), pp. 2469-2481. https://doi.org/10.1080/00103624.2019.1667373

APA-Zitierstil: Steckenmesser, D., Vogel, C., & Steffens, D. (2019). Medium-scale Plant Experiment of Sewage Sludge-based Phosphorus Fertilizers from Large-scale Thermal Processing. Communications in Soil Science and Plant Analysis. 50(19), 2469-2481. https://doi.org/10.1080/00103624.2019.1667373