Kategoriarkiv: Kretslopp

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

BONUS RETURN annual meeting and regional learning event in Helsinki

English version below.

Doktorand Solveig Johannesdottir och forskare Jennifer McConville deltog i det årliga mötet för projektet BONUS RETURN I Helsingfors 28-29 maj. De två interna dagarna avslutades med en dag för externa deltagare för kunskapsutbyte och diskussioner kring cirkulär ekonomi den 30e maj. Dagen startades med en presentation om RETURN projektet, följt av presentationer av Akko Karlsson (Kalmar Regional Council), Marcus Svedberg (Senior advisor, Stockholm Sustainable Finance Centre), Eija Hagelberg (Project Director, JÄRKI project, Baltic Sea Action Group) och Marc Klaus (Director, Race For The Baltic). Därefter hölls en paneldiskussion kring ämnet “Hur kan vi möjliggöra cirkulära innovationer för att starta hållbara förändringar i Östersjöregionen?”. Under eftermiddagen fick deltagarna sedan delta i diskussioner i mindre grupper kring ämnena risker och fördelar med cirkulär ekonomi, sociala dimensioner, hur entreprenörskap kan påverka omställningen till cirkulär ekonomi och nätverk för cirkulära innovationer. För mer information om projektet, se bonusreturn.com och kolla in #bonusreturn på Twitter.The BONUS RETURN partners in Helsinki, the 28th of May. PC: SEI 

Fortsätt läsa BONUS RETURN annual meeting and regional learning event in Helsinki

Join Run4Life@IFAT / The virtuous circle of integrated nutrient recovery in Munich on May 17th

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. 

Fortsätt läsa Join Run4Life@IFAT / The virtuous circle of integrated nutrient recovery in Munich on May 17th

Presentation vid mottagandet av Vattenpriset 18-03-14

I samband med att Håkan Jönsson, professor vid Forskargruppen för kretsloppsteknik mottog 2018 års vattenpris från Föreningen Vatten höll han en presentation om sin forskning och sin vision om framtidens kretsloppsanpassade avloppssystem när dess näring återförs som bra gödsel för odling av mat istället för att övergöda vatten.          Bilderna tillsammans med förklaringar finns här                                                                Bilderna från presentationen finns härFöreningen Vattens ordförande Marta Juhlén delar ut 2018 års Vattenpris till Håkan Jönsson. Foto: Ingrid Mossberg                                                                                                                                                     Fortsätt läsa Presentation vid mottagandet av Vattenpriset 18-03-14

The 2018 Water Prize ceremony in Stockholm

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

Fortsätt läsa The 2018 Water Prize ceremony in Stockholm

SPANS project work in Uganda

There is a lot going in the SPANS project in Uganda right now.

We have started demonstration units of nutrient-recovery treatment technologies for fecal sludge at the Luibgi wastewater treatment plant in Kampala. Two MSc students from Luleå University of Technology are currently operating demonstration units for treatment with lime and urea.  The students are collecting and analyzing samples to determine if the technologies are functioning properly with regard to reduction of public and environmental health risks. They are also doing interviews with workers at the wastewater treatment plant and other stakeholders to understand the levels of acceptance and feasibility of implementing such technologies within the existing management structures. Soon two students from Makerere University will be starting a demonstration unit with Black Soldier Fly composting at the wastewater treatment plant.

Fortsätt läsa SPANS project work in Uganda

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

Lessons learnt towards sustainable resource loops, and remaining challenges

On 25th October, the kretsloppsteknik research group hosted a farewell symposium in honor of Professor Håkan Jönsson. At SLU, Prof. Jönsson has been leading research and education on the topic of nutrient recycling from wastewater and food waste since 1993, when the topic was first introduced at the department of energy and technology. It was under his lead, the research group kretsloppsteknik (environmental engineering) was established.

In his farewell presentation Prof. Jönsson explored many topics such as composting, source-separation of wastewater, urine diversion and recycling, systems analysis and environmental impact assessment of urine diversion, etc. Click here to access the presentation which recaps the work, research and contributions of Prof. Jönsson to various subject areas over the years.

Prof. Jönsson closed the symposium with further remarks and a vote of thanksPost published by Prithvi Simha


Source separation: the future for efficient resource recovery

What is ‘New Sanitation’ according to Professor Grietje Zeeman from Wageningen University in the Netherlands? How has the practical experience been so far with the upflow anaerobic sludge blanket (UASB) reactor for blackwater treatment and bio-flocculation of greywater? Can micropollutants be mitigated through composting of anaerobic sludge? Are heavy metals from wastewater really a problem in agriculture? Interested in learning more about how these technologies have been applied at full scale in Sneek, Venlo, Wageningen and The Hague? Click here to access Professor Zeeman’s presentation.Post published by Prithvi Simha

Sustainable technologies to meet the future needs for sanitation

Is it possible to reduce the water footprint of a city to 1/10th of its current value without sacrificing any comfort? What does circular economy mean for sanitation systems? How important is phosphorous for food production? How can source separation systems improve nutrient cycling in the environment? Can we produce biodiesel from algae grown in urine? Professor Petter Jenssen from the Norwegian University of Life Sciences explores these questions and many more in his presentation which can be accessed herePost published by Prithvi Simha