Kategoriarkiv: Urintorkning

New publication on the drying of ion-exchanged human urine

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

Full-scale urine drying trials at SLU

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

Implementing Urine Drying technology in Durban, South Africa

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

Fortsätt läsa Implementing Urine Drying technology in Durban, South Africa

The Future in Sanitation is off the grid!

How much water do each of us use every day? Can future sanitation systems and off-the-grid houses be designed so as to minimize energy and water consumption? Where does wastewater management fit into the waste hierarchy/pyramid? In his presentation, Björn Vinnerås, Associate Professor at SLU shares with us his vision of future housing: a future where there is ‘no need for network connections, neither electricity nor water, and nor wastewater’.

Click here to access the presentation.Post published by Prithvi Simha

Licentiate Seminar: Jenna Senecal

Jenna Senecal, Doctoral Candidate at the Environmental Engineering Unit, Department of Energy and Technology will defend her licentiate thesis entitled, Urea stabilisation and dehydration for urine-diverting toilets: System and hygiene evaluation.

When?: 24 October 2017 at 09:00
Where?: Lecture Room S, Ulls hus, Swedish University of Agricultural Sciences, Uppsala

For further information, get in touch with Jenna Senecal at the Department of Energy and Technology, P.O. Box 7032, SE-750 07 Uppsala, Sweden. E-mail: jenna.senecal@slu.se

Abstract

Fortsätt läsa Licentiate Seminar: Jenna Senecal

Torrt gödselmedel från urin

English version below.
Att säga ”vi är vad vi äter” är bara en del av sanningen. Vad vi utsöndrar vad vi äter är den andra delen av sanningen när det gäller växtnäringsämnen. Mänsklig avföring innehåller samma kväve, fosfor och kalium (N-P-K) som vi finner i gödningsmedel som används för att producera den mat som vi sedan äter (Winker et al., 2009). Mänsklig avföring ses oftast som ett oönskat avfall världen över, vilket skapar humanitära och miljömässiga problem (Baum et al., 2013). För att ersätta näringsämnena som tagits bort med skörden från fälten tillverkas gödningsmedel i industriella processer som bidrar till miljöförändringar på global nivå (Rockström et al., 2009). Återvinning av mänsklig avföring tillbaka till lantbruket skulle minska det nuvarande beroendet av gödselmedel från fossila källor (Ramírez & Worrell, 2006).

Återföringen skulle dessutom förbättra avkastningen i t.ex. Afrika söder om Sahara, där gödselanvändningen är låg (FAO, 2015) och skydda marina ekosystem i Östersjön genom att begränsa flödet av överskott av näringsämnen till ytvatten (Rockström et al., 2009).
Fortsätt läsa Torrt gödselmedel från urin