New Publication on drying human urine using different alkaline media & temperatures

Published

In a study recently published in Science of the Total Environment, we present results from a study that investigated drying of fresh source-separated human urine in five different alkaline media (pH > 11) at elevated temperatures (50 and 60 °C) with minimal loss of urea, urine’s principal nitrogen compound. We found that it was possible to concentrate urine 48 times, yielding dry end-products with high fertiliser value: approximately, 10% N, 1% P, and 4% K. We monitored the physicochemical properties and the composition of various dehydration media to provide useful insights into their suitability for dehydrating urine. We demonstrated that it is possible to recover >90% nitrogen when treating fresh urine by alkaline dehydration by inhibiting the enzymatic hydrolysis of urea at elevated pH and minimising the chemical hydrolysis of urea with high urine dehydration rates.

Ida Helgegren – Doktorandpresentation den 19 maj

Published

Ida Helgegren, en doktorand pĂ„ Chalmers som har handletts av bland annat Jennifer McConville frĂ„n vĂ„ran forskningsgrupp, kommer att hĂ„lla en presentation om sin doktorsavhandling den 19 maj. Titeln Ă€r “Understanding the Roles of Stakeholders in the Water and Sanitation Sector- Implementation and Operation of Water Supply and Sanitation Systems in the Kanata metropolitan region, Bolivia“.

NĂ€r? 2020-05-19, kl.10.00

Vart? ZoomlÀnk till onlinepresentation: https://chalmers.zoom.us/j/65601700581

LĂ€nk till avhandling: https://research.chalmers.se/publication/516557

Opponent: Klaas Schwartz, IHE Delft Institute for Water Education, The Netherlands

Online doktorandpresentation med Claudia Cossio den 4 juni

Published

Claudia Cossio, som har varit samledd av Jennifer McConville frĂ„n vĂ„r forskargrupp presenterar sin doktorsavhandling den 4 juni. Avhandlingen heter “En resa mot hĂ„llbara smĂ„ avloppsreningssystem i lĂ„g- och lĂ€gre – medelinkomstlĂ€nder“, dĂ€r hennes fokus har varit pĂ„ Bolivia.

Var: https://chalmers.zoom.us/j/68990184473

LĂ€nk till doktorsavhandlingen: https://research.chalmers.se/publication/516714/file/516714_Fulltext.pdf

Opponent: docent Miller Alonso Camargo-Valero, School of Civil Engineering, University of Leeds, UK

Online public PhD defence of Claudia Cossio on June 4

Published

Claudia Cossio, who has been co-supervised by Jennifer McConville from our research group will present her PhD thesis on the 4th of June. The thesis is titled “A Journey towards Sustainable Small Wastewater Treatment Systems in Low and Lower–Middle Income Countries” and her focus has been on Bolivia.

Where: https://chalmers.zoom.us/j/68990184473

Link to thesis: https://research.chalmers.se/publication/516714/file/516714_Fulltext.pdf

Opponent: Associate Professor Miller Alonso Camargo-Valero, School of Civil Engineering, University of Leeds, UK

Ida Helgegren – PhD Defense on 19th May

Published

Ida Helgegren, a PhD student at Chalmers who has been co-supervised by Jennifer McConville from our research group will present her thesis on 19th May. Her thesis title is “Understanding the Roles of Stakeholders in the Water and Sanitation Sector- Implementation and Operation of Water Supply and Sanitation Systems in the Kanata metropolitan region, Bolivia“.

When? 2020-05-19 at 10:00

Where? Zoom link to on-line defense: https://chalmers.zoom.us/j/65601700581

Link to thesis: https://research.chalmers.se/publication/516557

Opponent: Klaas Schwartz, IHE Delft Institute for Water Education, The Netherlands

Examensarbete – UtvĂ€rdering av vatten och avloppslösningar för GlimĂ„kra Ekoby

Published

I GlimĂ„kra, Östra Göinge planeras en ekoby för vilken byalaget, GlimĂ„kra Utveckling Ă€r huvudman. GlimĂ„kra Utveckling vill ha hjĂ€lp med att utvĂ€rdera olika systemlösningar för vatten och avlopp dĂ„ de önskar att Ă€ven denna aspekt av boendet skall vara miljömĂ€ssigt optimerad. Examensarbetet kommer att utvĂ€rdera olika lösningar frĂ„n konventionellt kommunalt VA till miljömĂ€ssigt optimerade lösningar, t.ex. sorterande system med Ă„terförsel av nĂ€ring och vatten.

Uppdraget för examensarbetet Àr att föreslÄ och jÀmföra nÄgra olika systemlösningar för Vatten och avlopp för GlimÄkra Ekoby som hÀlsa, recipientskydd, resurshushÄllning, ekonomi, anvÀndaraspekter, organisation och teknisk funktion. Byalaget GlimÄkra Utveckling Àr öppna för olika VA-lösningar och ser gÀrna att Àven dagvatten inkluderas i analysen. Under vÄren 2020 gör konsultföretaget Water Revival Systems (WRS) en preliminÀr utvÀrdering av nÄgra lÀmpliga förslag vilka kan komma att ingÄ i system analyserade i examensarbetet.

Föredraget att examensarbetet utförs HT2021

Kontakt: Annika Nordin
annika.c.nordin@slu.se
070-550941

Debattartikel om klimatsmart produktion och ökad sjÀlvförsörjning med avloppsgödsel publicerad pÄ Landlantbruk.se

Published

I artikeln diskuterar en grupp forskare inom Àmnena kretsloppsteknik, hÄllbara livsmedelssystem, bioenergisystem och miljömikrobiologi vid SLU om potentialen att anvÀnda nÀringsÀmnen i avloppsprodukter att ersÀtta konstgödsel och sluta livsmedelssystemets kretslopp.

Fotograf: MÄrten Svensson

Comparing treatment options for nutrient-recovery from fecal sludge

Published

The latest publication from our project in Uganda is on-line. We present a multi-criteria assessment method for planning and decision-making related to options for recovering nutrients from fecal sludge. We apply the method to the case of Kampala, Uganda. However, we start with a broad list of potential technologies and there are quite a few references for more information on these technologies – so the method and data should be interesting for other people interested in options for nutrient-recovery.

Read the full paper here: McConville, J. R., Kvarnström, E., Nordin, A. C., Jönsson, H., & Niwagaba, C. B. (2020). Structured Approach for Comparison of Treatment Options for Nutrient-recovery from Fecal Sludge. Frontiers in Environmental Science, 8, 36.

JÀmförelse av behandlingsalternativ för nÀringsÄtervinning frÄn avföringsslam

Published

The latest publication from our project in Uganda is on-line. We present a multi-criteria assessment method for planning and decision-making related to options for recovering nutrients from fecal sludge. We apply the method to the case of Kampala, Uganda. However, we start with a broad list of potential technologies and there are quite a few references for more information on these technologies – so the method and data should be interesting for other people interested in options for nutrient-recovery.

Den senaste publikationen frĂ„n vĂ„rt projekt i Uganda Ă€r online. Vi presenterar en metod för bedömning av flera kriterier för planering och beslutsfattande relaterad till alternativ för utvinning av nĂ€ringsĂ€mnen frĂ„n avföringsslam. Vi tillĂ€mpar metoden pĂ„ fallet i Kampala, Uganda. Men vi börjar med en bred lista med potentiella tekniker och det finns en hel del referenser för mer information om dessa teknologier – sĂ„ metoden och data borde vara intressanta för andra som Ă€r intresserade av alternativ för nĂ€ringsĂ„tervinning.

LÀs hela artikeln hÀr: McConville, J. R., Kvarnström, E., Nordin, A. C., Jönsson, H., & Niwagaba, C. B. (2020). Structured Approach for Comparison of Treatment Options for Nutrient-recovery from Fecal Sludge. Frontiers in Environmental Science, 8, 36.

Luis successfully defended his PhD thesis!

Published

Luis Fernando Perez Mercado successfully defended his thesis “Farm-based technologies for management of risks from irrigation with wastewater-polluted sources in Cochabamba, Bolivia” on April 16.

Link to thesis: https://pub.epsilon.slu.se/16783/1/perez_mercado_l_200324.pdf

A totally new concept with having the evaluation performed over link. All was working well and the defence was a success!

Pictures from defence: https://photos.app.goo.gl/vHkR5kvaSPQv1xcp9