A new project update about our new project in Göttingen, Germany. After signing the contract of the European-wide tender last June, the reconstruction of the new tunnel composting installation in Göttingen has begun.
The almost complete destruction of the old facility during the devastating fire in August 2016, was used by Göttingen Entsorgungsbetrieben (GEB) as an opportunity to build a new, state-of-the-art bioenergy center. These last few months have consisted choosing a design, planning, obtaining corresponding permits and tendering for the required services. Now that this work has been completed, GEB is ready to begin construction.
The newly constructed tunnel composting facility with upstream batch fermentation, can process up to 22,500 tons of biowaste and green waste per year, which includes 5,500 tonnes of biowaste from the former district of Osterode / Harz. The commercial Operations Manager, Dirk Brandenburg, is rightly proud of the municipal cooperation that he has achieved: “Another trend-setting piece of the mosaic in trusting inter-municipal cooperation.”
“At full capacity, the facility will produce about 1.6 million cubic meters of biogas and 7,500 tons of quality compost annually,” explains the technical manager, Maren Reimann. “Assuming that a bathtub holds 150 liters, the amount of compost will be 111,100 filled bathtubs,” she says.
The biogas produced at the facility will be used in part for the electricity and heat requirements of the bioenergy center while the remainder will be fed via micro gas to the also GEB-owned wastewater treatment plant (ARA) for electricity generation. Both the BEZ and the ARA are largely energy self-sufficient with the surplus of electricity fed back into the grid. The total amount of electricity generated from the biogas corresponds to the average consumption of 1,200 private households. The annual CO2 savings achieved by this method amounts to 3,240 tonnes, which is as much as 18 million driven car km.
Depending on the delivery conditions for the finished compost, treatment costs of approx. EUR 85 per tonne of biowaste is expected to be processed.
“The process will yield a marketable high quality of compost”, said the BEZ department head, Jörg Bittner. “The quality-assured compost is suitable for use in accordance with specifications of organic farming.” The customers include local farmers of the city of Göttingen as well as companies in the region of southern Lower Saxony. For the distribution of compost to private citizens, a separate depot will be set up to close the nutrient cycles in the Göttingen private gardens again directly.
The building exterior will also have a visible “green appeal”. The green facades and wood panelling on the administration building will be designed with the environment in mind such that people feel close to nature. The facility will also include an education center on the 20,000 m2 area of the BEZ. GED will be able to provide visitor groups with an oveview of plant processes from input to composting to biogas production without interrupting operations via visitor path on the roof.
For more information about Göttingen Entsorgungsbetrieben (GEB) please visit www.geb-goetingen.de
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