Regenerative Energie
Sewage sludge is a suitable resource for phosphorus. Because of the presence of harmful substances, particularly heavy metals, the application to agricultural land is seen more and more critically and is already partially banned. The aim is therefore to treat sewage sludge in a way that harmful substances are eliminated and nutrients, particularly phosphorus, can be recovered.
The recovered phosphorus has to be suitable as a potential fertiliser. It has to have a low concentration of heavy metals and a good accessibility for plants, which means, that phosphorus has to be present in its soluble form.
At the moment there is no efficient recovery procedure on a large scale available, which offers a high recovery potential, an elimination of harmful substances and a product with a good uptake by plants.
In order to feed the world population sufficiently, the (limited) farmland needs to be fertilised, among others with the essential nutrient phosphorus. Natural resources of phosphorus are not in short supply as yet, but limited. Therefore it would be useful to close the phosphorus cycle by recovering phosphorus, and sewage sludge is a suitable resource for it.
Several recovery processes from sewage sludge have been developed, but so far none of them could be operated economically on a large scale.
In the following section we will give a vague estimate about the time frame, in which a recovery of phosphorus from sewage sludge might become economically efficient.
| Copyright: | © Thomé-Kozmiensky Verlag GmbH |
| Quelle: | Waste Management, Volume 3 (Oktober 2012) |
| Seiten: | 8 |
| Preis: | € 0,00 |
| Autor: | Dr.-Ing. Jutta Ansorg Dipl.-Ing. Thomas Vollmeier |
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Hochlauf der Wasserstoffwirtschaft
© Lexxion Verlagsgesellschaft mbH (8/2024)
Überblick über und Diskussion der Maßnahmen zum beschleunigten Ausbau
der Wasserstoffinfrastruktur in Deutschland
Die innerstaatliche Umsetzung des Pariser Klimaschutzübereinkommens
- ein Rechtsvergleich
© Lexxion Verlagsgesellschaft mbH (8/2024)
Like all public international law treaties, the Paris Climate Accords rely on national law for their implementation. The success of the agreement therefore depends, to a large extent, on the stepstaken or not taken by national governments and legislators as well as on the instruments and mechanisms chosen for this task. Against this background, the present article compares different approaches to the implementation of the Paris Agreement, using court decisions as a means to assess their (legal) effectiveness.
Klimaschutzrecht und Erzeugung erneuerbarer Energien in der Schweiz
© Lexxion Verlagsgesellschaft mbH (8/2024)
Verschachtelte Gesetzgebung unter politischer Ungewissheit