Regenerative Energie
Until 1960, almost all of the waste in Kathmandu was organic and became recycled by processing it to compost. Traditionally the waste generated in households was sold directly to the farmers or it was placed in so called ‘saagas’ (‘saa’ means compost and ‘gaa’ means pit).
These 'saagas' were located between the houses. Today, the ‘saagas’ have vanished and the composition of solid waste has changed because of the introduction of new materials e.g. plastics, paper, and glass (UNEP, 2001). This development started with the introduction of the water closet in Kathmandu (around 1960) when all faeces came into the rivers without any treatment. As rivers were polluted the peoples attitude towards the formerly holy rivers and the environment changed. Since that time most people dump their waste on the streets, in public places or in the rivers (Zimbelmann, 2006). This development culminates in the fact that the city government nowadays officially runs dumping sites in the rivers flood plains. Another indicator for the direction of Kathmandu's organic waste management development is the sharp increase in the use of chemical fertilisers. This also indicates that the practice of recycling waste and faeces to produce organic fertiliser has disappeared and most people and farmers are using chemical fertilisers instead (UNEP, 2001). This disastrous situation led already in the 1980s to some research projects related to waste management and organic waste management. At that time a comprehensive GTZ (German Technical Cooperation) project was indicated in the Kathmandu valley. The project clearly showed that a large scale composting plant would make sense and that the people would use compost as well as pay for it. It was possible to produce compost of a good quality by only having a simple manual sorting.
| Copyright: | © European Compost Network ECN e.V. |
| Quelle: | Orbit 2008 (Oktober 2008) |
| Seiten: | 8 |
| Preis: | € 0,00 |
| Autor: | Dipl. Ing. Christian Springer Prof. Dr. Ing. habil. Werner Bidlingmaier |
| Artikel nach Login kostenfrei anzeigen | |
| Artikel weiterempfehlen | |
| Artikel nach Login kommentieren | |
Europäische Rechtsvorgaben und Auswirkungen auf die Bioabfallwirtschaft in Deutschland
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (11/2025)
Bioabfälle machen 34 % der Siedlungsabfälle aus und bilden damit die größte Abfallfraktion im Siedlungsabfall in der EU. Rund 40 Millionen Tonnen Bioabfälle werden jährlich in der EU getrennt gesammelt und in ca. 4.500 Kompostierungs- und Vergärungsanlagen behandelt.
Vom Gärrest zum hochwertigen Gärprodukt - eine Einführung
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (11/2025)
Auch mittel- bis langfristig steht zu erwarten, dass die Kaskade aus anaerober und aerober Behandlung Standard für die Biogutbehandlung sein wird.
Die Mischung macht‘s - Der Gärrestmischer in der Praxis
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (11/2025)
Zur Nachbehandlung von Gärrest aus Bio- und Restabfall entwickelte Eggersmann den Gärrestmischer, der aus Gärresten und Zuschlagstoffen homogene, gut belüftbare Mischungen erzeugt. Damit wird den besonderen Anforderungen der Gärreste mit hohem Wassergehalt begegnet und eine effiziente Kompostierung ermöglicht.