Technology
Closing the Loop
We provide modular sanitation solutions, with a focus on technologies for the recovery of nutrients and water from human excreta and grey water.
Our first product, the Nutrient Harvester, is an on-site treatment technology that transforms urine into a concentrated fertilizer. It can be operated with urinals or urine-separating toilets, and it complements existing sanitation technologies for feces, greywater or mixed wastewater. Unlike the time consuming installationion of conventional wastewater treatment solutions, we provide a prefabricated, standardised unit that only needs to be connected to a socket.
Treatment Goals
Removal of pathogens and unwanted chemical substances
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Recovery of nutrients (Nitrogen, Phosphorus, Potassium) and water
Prevention of environment pollution and
Prevention of waste production
To fulfill these treatment goals, the urine undergoes a four-stage process:
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By stabilising the liquid, pathogens are inactivated and a conversion of urea into ammonia is inhibited. This prevents the loss of the nutrient as well as the production of odours caused by volatile ammonia and organic degradation products.
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In an optional step, micro-pollutants such as drug residues can be removed from the urine.
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In the last stage, the solution is concentrated by evaporating 95% of the water content to produce a nutrient rich (NPK) fertilizer product.