Regenerative Energie
Waste-to-Energy plants using grate-based systems have gained world-wide acceptance as the preferred method for the sustainable treatment of household waste (MSW). The inert ash Content in the waste and the solids formed in the gas phase are discharged, together with added additives, as solid and fl uid residues.Bottom ash produced during thermal waste treatment accounts for the largest mass flow of residues at approx.
200 - 250 kg per Mg of combusted waste. It comprisesash particles (sintered, melted), incompletely burned substances (TOC approx. 1 % by weight),metals (ferrous and non-ferrous) in various forms as well as materials such as glass, ceramicsand stones. Fly ash has the form of particles in the flue gas flow (boiler ash, fi lter ash). Residues that accumulate after additives have been added are referred to as flue gas cleaning residues.Approximately 12.5 kg of fly ash are produced per Mg of combusted waste. Fly ash contains heavy metals (such as cadmium, lead and zinc) and organic compounds (e.g. PCDD/F). Moderngrate-based systems with a reverse-acting grate ensure that high fuel bed temperatures, coupled with sufficient residence time, effective waste bed mixing and an adequate supply of air and oxygen, are achieved during combustion. The sintering and melting processes that also take place in the fuel bed in conventional operation permit binding of residues recirculated together with the waste and the safe destruction of organic substances.
| Copyright: | © Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben |
| Quelle: | Depotech 2014 (November 2014) |
| Seiten: | 1 |
| Preis: | € 0,00 |
| Autor: | Dr.-Ing. Ralf Koralewska |
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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