Urine drying from Sanitation360:Semi-finalists at the FAMAE Water Challenge


This year, members of the Kretsloppsteknik group at SLU started Sanitation360, a startup company which aims to commercialise the urine dehydration technology being developed at SLU. As Sanitation360, we participated in the FAMAE Water Challenge (“Precious Water!”) where the goal was to design a simple and innovative product or service to preserve water, make it cleaner & accessible to everyone. Sanitation360’s innovative urine dehydrating toilet was selected amongst the Semi-finalists of the competition, finishing among the TOP 100 of more than 3,000 candidates from 120 countries. According to the Jury, our “disruptive phosphorous-capture toilet convinced the team and the Jury”.

FAMAE is an independent family foundation that supports innovation in the field of environnement. The foundation organizes every year an International Challenge to help inventors to create simple and innovative solutions that can substantially improve our daily lives, while significantly alleviating environmental footprints.

Agricultural field trials on dehydrated urine – “Granurin”


Between December 2018 and February 2019, we installed and used eight family-scale urine dehydrator prototypes in Uppsala. At the end of this period, we managed to produce 40 kg of dry fertiliser (which our collegues in France call “granurin”) with a nitrogen content of 10%. We thus managed to dry nearly 500 L of urine, which is what an average person urinates in a year. This fertiliser is now being applied and tested as part of the AGROCAPI project, where the intent is to ‘study the agronomic valorization of products resulting from urine source separation’. The trials are being carried out in France by Tristan Martin and colleagues at the Institut National de la Recherche Agronomique (INRA).

Cllick to read more about the AGROCAPI project

Kretsloppsteknik at Uppsala city library to discuss our current water-borne sanitation system


Next week, Annika Nordin and Cecilia Lalander, Researchers at Kretsloppsteknik will be at the Uppsala City Library to discuss why our current water-borne sanitation system is not as good as many might think. They will present what we believe will be the future sanitation solutions, which in a better and more efficient way safeguard and manage the resources in our sewers.

Urine drying research featured in Finnish media


Within the MORTTI project, our group’s urine drying technology is being piloted at Pori Brigade’s military training site in Finland. Earlier this week, as part of an organised media day event, members of our group Caroline Karlsson and Prithvi Simha alongwith MORTTI project partners interacted with several local and national media outlets. Click below to read what the media thought of this visit and our toilet system.

YLE: On TV The soldier’s piss improves the world – dry urine is a good fertilizer & In Print https://yle.fi/uutiset/3-10730337

Maaseudun Tulevaisuus: The Defense Forces are trying to recover urine as fertilizer – In the Pori Brigade exercise area there is a Biomaja field toilet

Helsingin Sanomat: In Säkylä, the nutrients of the urine are preserved, with the aim of making urine fertilizer

Satakunnan Kansa: Converting soldiers’ urine into dry fertilizer powder – a Swedish invention that can come into play at festivals in the future

Verkkouutiset: The recycling of the officers’ urine is being tested

Länsi-Suomi: Army is testing a pilot toilet in Säkylä

ContactPrithvi Simha

Recycling urine from soldiers as dry fertiliser: Pori Brigade, Finnish Defence Forces


On the 8th of April, the MORTTI project partners organised a media day for our project in Finland that has been operational since the first week of March. This 3-month pilot stabilises and dries human urine collected from soldiers, to be safely recycled as a dry powder fertiliser. The project pilots the urine drying technology developed by our research group at SLU. Representing Kretsloppsteknik at this event were Caroline Karlsson and Prithvi Simha.

Master’s thesis project: identifying logistics for new sanitation systems products


Proposed Title: Identifying effective transport systems and logistics for new sanitation systems that produce fertilisers from human wastes.

Credits: 30 credits; Level: Advanced
Subject: Technology or Environmental Science
Start: As soon as possible

Background: In the sanitation sector, there is growing recognition that we urgently need to change the way we handle, treat, and recycle human wastes in our environment. At the Swedish University of Agricultural Sciences (SLU), the environmental engineering research group has developed the ‘urine dehydrator’, an exciting new technology that converts liquid human urine into a hygienic, commercial-quality, dry fertiliser. The technology involves two steps, (a) using a urine-diverting toilet at home, to separately collect urine without the faeces; and (b) drying the urine within an alkaline substrate that placed is placed in the urine dehydrator.

Student project: Simulation model to support sanitation planning game – nutrient recovery


We are looking for a motivated and enthusiastic student to assist in developing a computer model that simulates the impacts of different technology choices for management of wastewater flows. The model will be incorporated into a serious game that we are developing to guide sanitation planners and decision-makers. The game is a multi-stakeholder, spatial planning game for municipal sanitation which focuses on resource recovery. It will allow for a visual representation of what technologies can be used and what resources can be recovered from sanitation facilities.

The urine drying pilot is operational


After a week in the city of Tampere in Finland, our team over there finished integrating a urine drying bed into the Biomaja toilet. The entire toilet is on a trailer, making it portable and houses a dry urinal and a urine diverting dry toilet. The urine treatment is done by alkaline dehydration, a technology developed by our research group and which we have been pursuing for several years now. The urine treatment unit requires an area of just 0.75 m2 and has a capacity of processing 30 L urine/day into a dry, nutrient-rich fertiliser.

On the 4th of March, members of our group that travelled to Finland, along with partners from the MORTTI project transported the integrated toilet 100 km west of Tampere. The toilet is now very much operational, and is intended to be used for a period of at least 3 months.