Decentralised sanitation technologies based on source separation of toilet waste have attracted a lot of research attention – the social sustainability of these technologies, not so much. To attempt to fill this gap, members of the Kretsloppsteknik group collaborated with researchers at VIT University, to explore what food consumers in India think of urine recycling. The results were recently published in the journal Water Research, where a survey of 1252 consumers at the VIT University campus revealed: 68% stated human urine should not be disposed but recycled, 55% considered it as fertiliser, but only 44% would consume food grown using it. Fortsätt läsa New publication: Will Indian consumers eat urine-fertilised food?
Close to midsummer, Björn Vinnerås was in Delft teaching students from the new MSc program in Sanitation at the UN-IHE. The lectures were in the module of “Sanitation Technology” talking about pathogens and hygienisation technologies. Lectures ended up discussing four case studies on how to manage a recycling sanitation system without spreading any diseases. A really inspiring group of students eager to learn and discuss this topic. They will be a good resource in the future of on-site sanitation and reuse of plant nutrients. The new MSc program in Sanitation at UN-IHE, Delft PC: Shirish Singh
Värdarna för ettårsmötet var Helsingborgs VA-organisation NSVA, som bland annat presenterade de spännande planerna för explateringen av det nya området H+ i centrala Helsingborg, inklusive visionerna för ett uthålligare avloppssystem med Recolab. Det var ett givande möte med tillbakablickar på projektets första år samt planeringen av kommande år när vi bland annat skall förbereda odlingsförsök med de olika avloppsbaserade gödselmedlen som produceras inom projektet. SLU representanter Björn Vinnerås & Annika Nordin.
In a recent study published in Water Research, members of the Kretsloppsteknik group investigated the possibility of alkalising human urine by anion-exchange and dehydrating urine into a dry fertiliser powder.Fresh urine was passed through an ion-exchanger, stabilised by alkalisation (pH >10), added to an alkaline media (wood ash/alkalised biochar) and dehydrated
Simha, P., Senecal, J., Nordin, A., Lalander, C., Vinnerås, B., 2018. Alkaline dehydration of anion–exchanged human urine: Volume reduction, nutrient recovery and process optimisation, Water Research. In Press. doi: 10.1016/j.watres.2018.06.001. Fortsätt läsa New publication on the drying of ion-exchanged human urine
This week, the Environmental Engineering group at SLU starts its full-scale urine drying experiments. The group has designed and built 6 household-scale urine drying prototypes for the experiments. Over the coming months, every day, these units will be drying 24 litres of urine. The biggest challenge so far has been to collect enough daily fresh urine to feed the prototypes. We thank all those who have donated urine so far, and hope that these donating keep coming. Your donations can potentially help revolutionise sanitation!
Urine donation points at toilets across the Department of Energy & Technology, SLU; PhD Candidate Prithvi Simha eager to get the experiments started in our Hygiene Lab Fortsätt läsa Full-scale urine drying trials at SLU
The H2020 Run4Life project is organising a Stakeholder Engagement Workshop as a side event at the IFAT trade fair in Munich, on May 17th. Everyone with an interest in nutrient recovery is invited to take part in this inspiring event. The programme includes a wide variety of speakers ensuring that it will be a very interesting morning. Please visit http://run4life-project.eu/run4life-ifat to have a look at the programme, and register your attendance.
Prithvi Simha, Jenna Senecal, and Björn Vinnerås just returned after spending a week in Durban, South Africa. We travelled there to present our novel sanitation technology called alkaline urine dehydration to several potential collaborators, and to see if the technology could fit into the local context. We met with sanitation experts from the Pollution Research Group at the University of KwaZulu-Natal, the eThekwini Municipality, and Envirosan (a toilet manufacturer based in Durban). The trip was extremely fruitful with a positive response from all experts about our technology. We even brought back with us two new urine-diverting toilets to test our system with (thank you Envirosan!). Our next step will be to return to Durban with a pilot-scale urine drying system that the Pollution Research Group will test at their research facility. Following this, drying units will also be tested in people’s homes at the eThekwini municipality. A big thank you to Chris Buckley for co-ordinating the trip & to the NJ Committee on Global Affairs for the financial assistance.SLU EnviroSan Loot; PC: Chris Buckley
Björn Vinnerås deltog i detta möte på ETHs kursgård Monte Verita i Ascona i södra delen av Schweiz. Platsen var en av de mer bildsköna mötesplatser man kan tänka sig med palmer i förgrunden och snöklädda berg i bakgrunden. Utsikten från konferenscentret Monte Verita. PC: Björn Vinnerås
Fokus Deltagarna i mötet var 35 internationella experter omkring decentraliserad sanitet. Fokus för diskussionerna var framtidens enskilda avlopp med ett specifikt fokus på lokala lösningar. Bernhard Truffer, EAWAG presenterar skillnaden i kostnad mellan centralicerade och decentraliserade system i relation till antalet användare i Schweiz. PC: Max Maurer
In a very recent study published in Science of the Total Environment, Sahar Dalahmeh, a researcher at the Environmental Engineering Unit and her co-workers investigated concentrations and partitioning of 26 per- and polyfluoroalkyl substances (PFASs) in wastewater, surface water, soil and crop plants (yam, maize and sugarcane) in Nakivubo wetland and Lake Victoria at Kampala, Uganda.Location of the study area at Kampala, Uganda, and the sampling sites
Professor Håkan Jonsson received the 2018 Water Prize from Föreningen Vatten yesterday (14.03.2018) for his work on nutrient recycling. Many congratulations to him from all of us at the kretsloppsteknik research group at SLU!
Marta Ahlquist-Juhlén from Föreningen vatten delivering the Vatten-priset to Professor Håkan Jönsson; PC – Magnus Berglund