Regenerative Energie
With the fast economic development and urbanization tendency, the municipal solid waste (MSW) generation increases dramatically in China. The amount of MSW collection reached 155.09×106 tons in 2004 from 67.67 ×106 tons in 1990 (National Bureau of Statistics of China, 2005). Traditionally the disposal method is landfilling or dumping unsafely in some suburbs or rural areas, whose storage amounts to more than 6 billion tons and results in more than 200 cities surrounding with MSW. Just in the year of 2005, the amount of MSW dumped unsafely in the whole country amounted to 75.26×106tons as reported by China Construction Department (China Construction Department, 2006). Lots of land has been occupied and water and soil were polluted. To dispose MSW has become a serious social problem in China. (Session A9: Waste recycling (I))
Fresh municipal solid wastes (MSW) and aged MSW including MSW from landfills and dumpsite have been characterized and compared by their components, moisture content and lower heat value (LHV) in order to recycle and dispose them properly. Firstly the characterizing experiments were performed and the results showed that generally the fresh MSW are of high moisture contents and their LHV is below 6500kJ/kg; and when 40% of plastics were separated, their LHV is less than 5000kJ/kg. Combustibles in aged MSW were easily to be separated and their LHV is higher than 11000kJ/kg as just separated. Analysis of aged MSW of different years’ old showed that as MSW became older the moisture and paper contents decreased. No leachate produced from aged MSW during the analysis and separation process. For both fresh MSW and aged MSW the main contributor to LHV is plastics. Secondly a simple separating system consisting of a roller screen and a winnower is used to separate plastics from fresh MSW and aged MSW, and the quality of plastics were compared by their physical parameters after made into pellets; the results showed that plastics from fresh MSW can be recycled as raw material for secondary product; while plastics separated from aged MSW are of lower quality and only suitable to be recycled as fuel material. Finally different recycling methods were suggested for fresh and aged MSWs based on their characteristics.
| Copyright: | © IWWG International Waste Working Group |
| Quelle: | General Session A (Oktober 2007) |
| Seiten: | 10 |
| Preis: | € 10,00 |
| Autor: | Yanji Li D. Chen W. Cui |
| Diesen Fachartikel kaufen... (nach Kauf erscheint Ihr Warenkorb oben links) | |
| Artikel weiterempfehlen | |
| Artikel nach Login kommentieren | |
carboliq® - Direktverölung gemischter Kunststoffabfälle
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (4/2025)
Die Forderung nach Klimaneutralität dominiert die globale Diskussion über die Zukunft der Industriegesellschaft. Damit einher geht auch die Frage, wie der
Umgang mit Kunststoffen in Zukunft erfolgen wird.
Nutzungskonflikt zwischen Carbon-Capture-Anlagen und Fernwärme?
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (4/2025)
Die EEW Energy from Waste GmbH (EEW) hat sich das Ziel gesetzt, bis 2045 klimaneutral zu werden. Mit 17 Standorten verfügt EEW über eine Verbrennungskapazität von ca. 5 Millionen Tonnen Abfall pro Jahr.
Abfall- und Kreislaufwirtschaft in Deutschland im internationalen Vergleich - Spitzenplatz oder nur noch Mittelmaß?
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (4/2025)
Neben der Umstellung der künftigen Energieversorgung auf ein zu 100 % erneuerbares Energiesystem ist die Abfall- und Kreislaufwirtschaft die zweite zentrale Säule im Rahmen der globalen Transformation in eine klimaneutrale Wirtschaft und Gesellschaft.