loolaboo combines sanitary comfort with the Terra Preta Sanitation method.
This universal, modern toilet design has been created for global use in most diverse countries. It allows for use both when sitting or squatting to ensure cultural acceptance around the world. The toilet functions with a minimum amount of water rendering access to water and sewerage systems unnecessary. Production, installation and service of the toilet are very affordable.
Inside the toilet is a storage tank for collecting the feces. The capacity is large enough to serve a family of four for a week. Before the first use a lactic-acid-bacteria-sugar solution is added to the storage tank. These bacteria prevent unpleasant smells from arising and sanitize the storage compartment.
To support the process of lactic-acid-fermentation, the toilet´s tank may be kept air-tight by a sliding gate-valve. A pressure spray nozzle is used to cleanse the bowl and can also be used for anal cleansing as is common for half of the world’s population.
Once a week a pump truck empties the tank from outside the house. Through an opening in the wall, the toilet´s storage tank is accessible from the building’s exterior. The service provider also refills the tank with new lactic-acid-bacteria-sugar solution. The truck then transports the waste material to a composting facility for further processing.
The toilet system works for isolated houses, row-houses, small settlements and multi-story living complexes.
Design by triften design studio · hamburg
Terra Preta Sanitation solves two problems that plague many developing countries: poor soils and a lack of sanitation. Any way of creating better compost – and well-structured, humus-rich soils – is important for food security, resistance to soil erosion, increased water retention in humus rich soil and the growth of local economies. Terra Preta Sanitation is an optimal way towards comfortable and cost efficient systems.
Terra preta was originally practiced by pre-Columbian Indians in the Amazonian region (in what is today Brazil) over 1,000 years ago. These ancient people created “black“ soils, known as terra preta in Portuguese. The soils are a mix of charcoal, composted excreta and various other bio-wastes, and they are highly fertile, porous and absorptive.
The modern Terra Preta Sanitation method, developed at the Hamburg University of Technology, is based on the knowledge of the ancient Amazonian civilization. Human excreta and other bio-wastes are transformed into pathogen-free, nutrient-rich humus full of organic matter.
This new sanitation method combines two natural biological treatment processes. First there is the lactic-acid fermentation in the toilet´s storage tank during the collection of the feces. It is combined with vermin-humification of the lacto-fermented matter in a central compost site. There, the waste is emptied into a basin that is partially filled with woodchips and charcoal to achieve dry conditions for composting. After a hot period of a week worms are added to the mixture.
Nutrient-rich humus is produced after approximately three months – this highly fertile humus is called Terra Preta (black soil). To be safe and to get rid of any remaining micro pollutants, this soil should not be applied to food crops for at least the first ten years following production. After a decade, even food plants can be fertilized with this rich, valuable humus.
This new sanitation system can improve enormous areas of land especially when used in reforestation applications. With these spongy humus soils, water and food security can be improved, flooding and drought can be avoided and over the long-term climate change can be counteracted. Terra Preta Sanitation ensures a more efficient, safe and more sustainable linkage between ecological human waste management and ecological agriculture.
Terra Preta Sanitation has been developed by:
Institute of Wastewater Management and
Univ.-Prof. Dr.-Ing. Ralf Otterpohl
TUHH Hamburg University of Technology, Germany.
Website Terra Preta Sanitation
c/o Hamburg University of Technology B-2
Eissendorfer Str. 42
21073 Hamburg, Germany
Univ. Prof. Dr.-Ing. Ralf Otterpohl
Dr.-Ing. Joachim Behrendt