| Project type: | mechanical waste treatment plant (MA) |
| Location: | Meißner-Weidenhausen, Hessen, Germany |
| Operator: | Umweltdienste Bohn GmbH |
| Capacityt: | (250,000 Mg/a) 685 t/d Household waste, bulky waste and commercial waste |
| Focus: | Generation of individual secondary fuels (SBS) |
CUSTOMER
Umweltdienste Bohn GmbH operates several of it´s own sorting, processing and power plant facilities in Germany, which recover recyclable materials and process residual materials into products from which valuable energy is recovered.
The various processing plants produce various types of secondary raw materials and quality-assured alternative and substitute fuels for a wide range of thermal recycling processes, from the cement industry to coal-fired power plants and SRF power plants.
REQUIREMENTS
Umweltdienste Bohn GmbH intended to build a waste treatment plant for the production of secondary fuel as an upstream facility for it´s own power plant (circulating fluidised bed) in Witzenhausen.
At the Weidenhausen plant, bulky-, commercial- and household waste from municipal waste collection was expected to be processed.
The initial waste volume of 120,000 Mg/a was intended to be doubled after only a few months of operation. This required a change in the operating permit. The approval for the increase in throughput capacity was granted in autumn 2009.
IMPLEMENTATION
Immediately after the order was placed with Waste Tec, the engineering planning as well as the resulting approval planning after coordination with the customer were prepared and submitted to the authorities.
After the successful granting of the building permit, Waste Tec prepare the tender documents for all trades.
Orders were placed to the individual subsuppliers by Umweltdienste Bohn GmbH. Waste Tec GmbH was responsible for site management and engineering support in the areas of mechanical, ventilation and electrical engineering up to commissioning of the complete plant technology.
Unmittelbar nach der Auftragserteilung an Waste Tec wurde die ingenieurtechnische Planung sowie die nach Abstimmung mit dem Kunden daraus resultierende Genehmigungsplanung erstellt und bei den Behörden eingereicht.
Nach erfolgreicher Erteilung der Baugenehmigung erfolgte die Zusammenstellung der Ausschreibungsunterlagen für sämtliche Gewerke durch Waste Tec.
Die Auftragserteilung an die einzelnen Unterlieferanten erfolgte durch die Fa. Umweltdienste Bohn GmbH. Die Bauleitung sowie die ingenieurtechnische Unterstützung in den Bereichen Maschinen-, Lüftungs- und Elektrotechnik bis hin zur Inbetriebnahme der kompletten Anlagentechnik lagen im Verantwortungsbereich der Waste Tec GmbH.
WASTE TREATMENT - THE PROCESS
Up to 685 Mg per day of bulky-, commercial- and household waste is fed into the waste treatment process by wheel loader after receipt in a delivery bunker.
The waste treatment starts with a pre-shredding of the waste. The waste is then fed into the processing hall via a belt conveyor system.
In the first step, the waste is separated into a “coarse”, a “medium” and a “fine” fraction, and in further steps, the medium fraction is separated into a heavy and a light fraction.
The separated oversize grain is fed back to the pre-shredder or can be re-shredded directly after the Fe separation.
The metals separated in the mechanical treatment process are fed into the material recycling process.
The following output fractions are produced:
- Refuse-derived fuel, high calorific value approx. 15%.
- Refuse-derived fuel, medium calorific approx. 45%
- Fines approx. 25%
- Heavy fraction approx. 10%.
- Fe-/NF fractions approx. 5%
The generated materials are temporarily stored in a closed loading hall in separate flat bunkers. The subsequent loading is carried out by wheel loader directly onto waiting trucks or into containers.
Waste Pre-Preparation
Waste Re-Preparation 01
Waste Re-Preparation 02
Waste Re-Preparation 03
