Teaching units

Compost factory
The Compost Factory introduces pupils into the recycling of biodegradable wastes. They learn how to make compost out of kitchen wastes and use them as fertilizer to grow tomatoes and other crop plants. They gather knowledge on the importance of earthworms in the natural cycle. The experiments also allow to demonstrate the difference between biodegradable and non-degradable wastes to children. They can observe what is happening to a plastic bottle that has been thrown on a forest so.
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From fish to tomato
Conventional aquacultures discharge high concentrations of nutrients into the environment, due to fish excrements and fish food residues in the effluent. From fish to tomato presents a polyculture system that combines aquaculture with vegetable or fruit production. In this so-called aquaponic-technique water and nutrients are recycled. The aquaculture effluent runs through planted beds where it is cleaned by the combined action of plants and bacteria. The cleaned water then flows back into the fish tanks. Thus, waste is converted into useful biomass, such as lettuce, strawberries or tomatoes.
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Secrets of rivers
The experiments in the teaching unit Secrets of rivers explain different processes of ecoremediation to sensitize pupils to the importance of river ecosystems. The teaching material provides teachers with ideas for excursions and experiments to let pupils experience different aspects of a river ecosystem and show them the relevance of the self-purification capacity of rivers.
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Cleaning water with plants
Constructed wetlands provide simple and ecological ways to recycle greywater and wastewater. The cleaned water can be used for irrigating home gardens or flushing toilets. The teaching unit Cleaning water with plants provides insights into principles of eco-engineering and gives pupils the opportunity for hands-on experience by constructing their own wetland model.
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