Terra Boga Project

Nature knows no waste! In the Botanic Garden, a central nature protection facility, untold amounts of biological waste are produced every year and these were conventionally disposed of to date. Closing the material cycles in the Gardens is the aim of the TerraBoGa cooperation project. With the financial support of the European Union and the Federal State of Berlin, the biological waste is being examined with respect to recycling it and, in accordance with the Garden’s needs, is being prepared using methods that were originally developed by the Incas from the Amazon Region of Brazil.

Terra Preta Sanitation (TPS) evaluated in the framework of the interdisciplinary research project Terra BoGa at the Botanic Garden in Berlin. It manages the organic resources and nutrients from the garden and from a public toilet facility according to the principles of closed loop recycling economy as effective and efficient as possible and to address also energy aspects related to organic waste occurring in the botanic garden in Berlin. The liquid phase is led through a so-called ‘charcoal nutrients activator’. An opening at the top of the chamber facilitates the removal and exchange of the barrel with pre-fermentedsolids and the charcoal loaded with nutrients. The Bio-Char is produced by means of pyrolysis in a so-called ‘carbonizer’ from wood-chips, which are waste products from plants growing in the botanic garden. The occurring heat, a byproduct from the pyrolysis process, is used for district heating on neighbourhood level within the botanic garden.

Resources and processes
Input: Wastewater (from toilets) , green wastes, bio waste
Output:
Solids and nutrients in the TPS system, pre-fermented in the barrel, bio char – energy for heat, clean water treatment, Terra Preta
Preventing 60 tonnes of biological waste a year
Promoting an understanding between people and nature, particularly in urban agglomerations (urban farming)
Partners
  • Botanischer Garten,
  • HATI GmbH,
  • FU AG Geökologie
  • Focus
    bio-waste, nutrients recovery
  • Date
    2010-2015
  • Industry
    Agriculture, Energy, Food
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