Phosphorrückgewinnung aus Klärschlammaschen – Ergebnisse aus dem EU-Projekt SUSAN

Adam, Christian; Peplinski, B.; Kley, Gerd; Kratz, Sylvia; Schick, Judith; Schnug, Ewald

doi:10.1007/s00506-008-0152-3

Cited by 11 publications

(8 citation statements)

References 6 publications

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“…The objective of these projects was to identify promising techniques and products for future developments. Similar projects are supported by the EU (e.g., "SUSAN" [11] or 'P-REX' [12]) or by other institutions like Fachagentur für Nachwachsende Rohstoffe (FNR, [13]).…”

Section: Introduction and Outlinementioning

confidence: 99%

“…The drawback is the increased concentration of heavy metals. A technique for reducing the heavy metal concentration was developed in the SUSAN project (Sustainable and Safe Re-use of Municipal Sewage Sludge for Nutrient Recovery [11]). The SSA are reheated in a rotary kiln to about 800-1000 • C together with a chlorine donator (CaCl 2 or MgCl 2 ).…”

Section: Introduction and Outlinementioning

confidence: 99%

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Fertilizer Effect of Phosphorus Recycling Products

Römer

Steingrobe

2018

Sustainability

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Between 2004 and 2011 the German Government funded 17 different projects to develop techniques of phosphorus recycling from wastewater, sewage sludges, and sewage sludge ashes. Several procedures had been tested, such as precipitation, adsorption, crystallization, nano-filtration, electro-dialysis, wet oxidation, pyrolysis, ion exchange, or bioleaching. From these techniques, 32 recycling products were tested by five different institutes for their agronomic efficiency, that is, their plant availability, mainly in pot experiments. This manuscript summarizes and compares these results to evaluate the suitability of different technical approaches to recycle P from wastes into applicable fertilizers. In total, 17 products of recycled sewage sludge ashes (SSA), one meat and bone meal ash, one sinter product of meat and bone meal, one cupola furnace slag, nine Ca phosphates from crystallization or from precipitation, Seaborne-Ca-phosphates, Seaborne-Mg-phosphate, and 3 different struvites were tested in comparison to controls with water soluble P, that is, either single super phosphate (SSP) or triple super phosphate (TSP). Sandy and loamy soils (pH: 4.7-6.8; CAL-P: 33-49 ppm) were used. The dominant test plant was maize. Phosphorus uptake from fertilizer was calculated by the P content of fertilized plants minus P content of unfertilized plants. Calculated uptake from all products was set in relation to uptake from water soluble P fertilizers (SSP or TSP) as a reference value (=100%). The following results were found: (1) plants took up less than 25% P in 65% of all SSA (15 products); (2) 6 products (26%) resulted in P uptake of 25 and 50% relatively to water soluble P. Only one Mg-P product resulted in an uptake of 67%. With cupola furnace slag, 24% P uptake was reached on sandy soil and nearly the same value as TSP on loamy soil. The uptake results of Ca phosphates were between 0 and 50%. Mg-P products from precipitation processes consistently showed a better P supply in relation to comparable CaP compounds. With struvite the same P uptake as for water soluble P was reached. The fertilizer effect of the tested P recycling products can clearly be differentiated: TSP = struvite > Mg-P = sinter-P > CaP , cupola-slag > thermally treated sewage sludge ashes > meat-and-bone meal ash = Fe-P.

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Section: Introduction and Outlinementioning

confidence: 99%

Section: Introduction and Outlinementioning

confidence: 99%

Fertilizer Effect of Phosphorus Recycling Products

Römer

Steingrobe

2018

Sustainability

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“…The main target was to get rid of heavy metals and increase P availability, but at the same time it was assumed that all organic contamination would be destroyed in the process as well (Adam et al 2008;Prinzhorn 2005). Theoretically, at temperatures above 800°C, all organic compounds remaining after the first sludge incineration process would be transformed to CO 2 and a clean ash product rich in plant-available nutrients should arise.…”

Section: Evaluation Of Technical Procedures To Remove Organic Contamimentioning

confidence: 99%

Organic Xenobiotics

Bloem¹,

Kratz²

2016

Phosphorus in Agriculture: 100 % Zero

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As well as fertilizer benefits, reutilization of phosphor (P) from secondary sources and recycling materials such as sewage sludge, farmyard manures, composts, biogas residues or meat and bone meal products on agricultural soils bears the great risk of contaminating farm sites with organic xenobiotics. Contamination of groundwater, surface and drinking water as well as of aquatic sediments and soils with pharmaceuticals has been reported (Hamscher et al.

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“…But xenobiotica and heavy metal impacts to agricultural soils must be strictly avoided (Rahmann et al 2009;Arthurson 2009). New technologies have been developed to produce P-rich sewage sludge or ashes containing low amounts of heavy metals (Adam et al 2008;Nowak et al 2010). Nevertheless, due to their different origins and processing, their P availability differs widely (Römer 2013) and agriculture has to care not to be used as depository of industrial waste with no or only low P availability.…”

Section: Suitable Fertilizers Must Be Discussedmentioning

confidence: 99%

Phosphorus—The Predicament of Organic Farming

Paulsen

Köpke

Oberson

et al. 2016

Phosphorus in Agriculture: 100 % Zero

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Today on many sites organic farming might neglect phosphorus (P) fertilization due to soil reserves build up by P fertilization of former farming systems. Additionally organic farming has restricted itself to the use of non-solubilised rock phosphate as mineral fertilizer source that only has limited plant availability on agricultural soils with adequate pH. Also recycling of P from the food chain back to organic agriculture is not consequently realised. These predicaments of organic farming endanger its future sustainability. The article gives an overview on the state of knowledge of the use of topsoil and subsoil P reserves by plants in organic production, on possibilities to activate them by biological measures for direct use by plants and for their redistribution on farms. As in legislation phosphate rock is defined as prevailing mineral fertilizer source for organic farming, a detailed view is given on the use of its P in dependence of plant variety. Also attempts to improve its fertilizer value by mixtures with organic matter are reviewed. It is obvious that plant roots and soil organisms can activate P from the soil and keep it in biological turnover. This is a promising concept to use soil reserves, but quantification of time-spans offering sufficient P supply just by this approach is not possible. Therefore, while promoting root density, root penetration and biological activity in soils, site specific analyses of plant available P in soil, analyses of field and farm P-budgets as well as of plants P supply are necessary to decide on P-fertilization. Soluble P sources, preferably from recycling processes, should be developed for future fertilization demands of organic farming.

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Phosphorrückgewinnung aus Klärschlammaschen – Ergebnisse aus dem EU-Projekt SUSAN

Cited by 11 publications

References 6 publications

Fertilizer Effect of Phosphorus Recycling Products

Fertilizer Effect of Phosphorus Recycling Products

Organic Xenobiotics

Phosphorus—The Predicament of Organic Farming

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