Kretsloppsteknik – Page 55 – Blog from the Environmental Engineering Research Group at SLU

New Publication on removal of per- and polyfluoroalkyl substances in onsite wastewater treatment

Published 23 January, 2019
By Prithvi Simha

In this study, we investigated the potential of biochar filters as a replacement or complement for sand filters for removal of per- and polyfluoroalkyl substances from wastewater in onsite sewage facilities. In a 22-weeks experiment, concentrations, removal and adsorption of nine perfluoroalkyl carboxylates (PFCAs; C3- 11) and three perfluoroalkane sulfonates (PFSAs; C4, 6, 8) and one perfluorooctanesulfonamide (FOSA; C8) were investigated in four treatments: biochar with active, biochar with inactive biofilm, biochar without biofilm and sand with active biofilm. We found that biochar with no biofilm achieved higher removal efficiency (90-99%) and the adsorption capacity (73 -168 ng g-1 ) for C7-C11 PFCAs, C6, C8 PFSAs and FOSA, than the other biochar and sand treatments. For all biochar treatments, shorter-chain PFASs were more resistant to removal than longer-chain PFASs.

Nduhiu Gitahi, doktor i filosofi

Published 9 January, 2019
By Lovisa Lindberg

Vi gratulerar Nduhiu Johnson Gitahi till doktorexamen i filosofi för sitt avhandlingsarbete: Isolering, serotyp och molekylär karakterisering av enteriska patogener för validering av Peepoo sanering längs hanteringskedjan i Kibera, Nairobi Kenya.

Nduhiu Gitahi, Doctor of Philosophy

Published 9 January, 2019
By Prithvi Simha

We congratulate Mr Nduhiu Johnson Gitahi to the degree Doctor of Philosophy achieved for his thesis work: Isolation, serotyping & molecular characterization of enteric pathogens for validation of Peepoo sanitization along handling chain at Kibera, Nairobi Kenya.

Två nya praktikanter för urinsorteringsprojektet

Published 19 December, 2018
By Lovisa Lindberg

Den senaste tillökningen i Kretsloppsteknik är två praktikanter, Chinmoy Deb och Anooj Ramanathan, som kommer hela vägen från Indien för att arbeta med urinsortering för sin kandidatexamen. Under deras kandidatexamen har både Chinmoy och Anooj forskat på sanitet, arbetat med näringsåtervinning samt borttagning av farmaceutiska rester från mänsklig urin. Ett stort intresse för sanitets- och hygienteknologier har tagit dem till vår grupp på SLU för en 3-månaders lång praktik som började i december. Under praktikperioden kommer de att vara involverade i pågående projekt relaterade till processmodellering, intensifiering och optimering.

Two new interns for the urine drying project

Published 19 December, 2018
By Prithvi Simha

The latest additions to Kretsloppsteknik are two interns, Chinmoy Deb and Anooj Ramanathan, coming all the way from India to work on urine drying for their bachelor’s thesis. During their bachelors program, both Chinmoy and Anooj have been doing research on sanitation, working with nutrient recovery as well as removal of pharmaceutical residues from human urine. A keen interest in sanitation and hygiene technologies brings them to our group at SLU for a 3-months long internship that began in December. Over the course of the internship, they will be involved in ongoing projects related to process modelling, intensification, and optimization.

Water & Wastewater Speciality in the Journal Frontiers in Environmental Science

Published 16 December, 2018
By Prithvi Simha

A new section about water and wastewater has been launched as a speciality section in the journal, Frontiers in Environmental Science. Björn Vinnerås together with the co-chief editor, Prof. Paolo Perona and the members of the editorial board welcome contributions to the journal. We aim at publishing pioneering, high-quality research in key areas of integrated and sustainable water and wastewater resources management. These include, for instance, uses and processes involving surface- and groundwater bodies, engineering techniques with a focus on upstream work, virtual water networks, innovative water and wastewater treatment solutions in humid, semiarid and arid regions, analytical and numerical modelling as well as the use of innovative algorithms devoted to the analysis of big-datasets. For more information see the following blog post: https://blog.frontiersin.org/2018/12/12/making-waves-paolo-perona-and-bjorn-vinneras-lead-new-water-related-section-in-frontiers-in-environmental-science/ Or directly at the home of the section, available at this link

Insects fed on waste as fish feed

Published 12 December, 2018
By Prithvi Simha

As part of the result of the Vinnova financed project Five tonnes of fishes in different dishes that aims at producing fish reared exclusively on Swedish produced feed, fish reared on insect based protein were tested and evaluated against fish reared on conventional fish feed. The protein in the test feed comprised of a 1:1 mixture of pea and insect protein. The insects (black soldier fly larvae) were fed stale bread. In total, 25 kg of rainbow trout in this first trial. To the joy of all, the fish fed with insects tasted really well, which suggest that it is feasible that insect can be a part of sustainable Swedish fish feed in the future.

Nature awareness champions competition participants visit

Published 7 December, 2018
By Evgheni Ermolaev

Participants of the “Naturvetarmästarna” competition in knowledge in natural sciences from 9th grade of Rosendalsgymnasiet visited our group at the Fly Larvae Composting Laboratory.
Björn Vinnerås, leader of the Environmental Engineering group, is introducing our vision and different directions of our research to the visitors. Photo: Evgheni Ermolaev.

The vision is to develop and evaluate technological solutions for safe and sustainable nutrient recycling from waste and wastewater to agriculture in a circular system.

The demonstration included two of several systems that the group is developing: organic waste management using black soldier fly larvae composting and sustainable fertilizer production through urine drying. Both system designs and components were presented and sparked multiple questions and discussions with the engaged pupils.

Working with K-12 pupils is a part of the ongoing group effort to introduce sustainable environmental engineering approaches to society and help in the effort of Sweden reaching the UN Sustainable Development Goals.

Contact
Evgheni Ermolaev

Developing a serious game for resource recovery

Published 5 December, 2018
By Prithvi Simha

In the project “Gamification of Sanitation Planning”, we are developing a serious game to support sanitation planning and increase the recovery of nutrients from waste flows. This fall we have had a series of workshops focusing on developing the game concept. The target group for the game is politicians and officials in decision-making positions. Other target groups are property owners, community-based organizations, students and other officials involved in sanitation planning. The aim of the game is to get the target group to understand what nutrient cycles are and what can be done to facilitate the construction of resource-recovery systems, i.e. how can different groups take responsibility? The game should also be fun to play, engaging, be able to inform about new technologies and lead to increased understanding of other actors’ perspectives. The game itself will be developed in early 2019 and be ready to test with audiences before the summer.

Utveckling av kretsloppspelet pågår

Published 5 December, 2018
By Prithvi Simha

I projektet ” Gamification av sanitetsplanering” håller vi på att utveckla ett serious game för att stödja VA-planering och öka kretslopp. Under hösten har vi haft flera utvecklingsworkshop som ska leda fram till ett spelkoncept. Primärmålgruppen för spelet är politiker och tjänstemän i beslutsfattande ställning. Övriga målgrupper är fastighetsägare, samfälligheter, studenter och tjänstemän inblandade i planläggningen av en VA utbyggnad. Målet med spelet är att få målgruppen att förstå vad kretslopp för växtnäringsämne är och vad man kan göra för att underlätta att ett kretsloppsystem byggs upp, dvs. hur kan olika grupper ta ansvar? Spelet ska också vara kul att spela, engagerande, kunna informera om ny teknik och leda till ökat förståelse av andra aktörers perspektiv. Själva spelet ska utvecklas under början av 2019 och vara färdig för att testa med målgrupper innan sommaren.