Course in modular fly larvae treatment: rearing and composting


Foto: Evgheni Ermolaev

Date: 14/3-2018, 9 ‚Äď 16
Location: Campus Ultuna (Biosfären och Flugväxthuset), Uppsala
Price: 5000 SEK/person

Under this one-day course the course delegates will be presented with a general introduction to fly larvae treatment, including both the fly rearing and composting steps. We will present the theory behind the different steps of the module based fly larvae treatment and practical exercises on handling of larvae, pupae and flies.  The course will be given in English.

Bachelor thesis presentation: Greenhouse gas emissions from fly larvae composting


Foto: Viktoria Wiklicky

Frida Erlöv will present her Bachelor thesis about Greenhouse gas emissions from fly larvae composting on 22 February at 2 pm in Ekoln. Håkan Jönsson is the examinor. The presentation will be held in Swedish.


Black soldier fly (Hermetia illucens) composting have proven to be very effective in degradation of organic waste products, while generating valuable products, such as animal feed and organic fertilizers or biofuels. Treatment with black soldier fly larvae has thereby a potential to contribute to a more environmental friendly and economically viable management of biological waste fractions. The aim of this study was to measure greenhouse gas emissions from black soldier fly composting and to compare these with emissions from thermophilic aerobic composting. Gas emissions from three different black soldier fly larvae composts were measured: one with only larvae and two in which specific fly larvae bacteria were added as well as the larvae. In addition, various parameters (pH, bulk density, compost maturity, total solids, organic content and total-N) were measured, to get a better understanding concerning present processes.

Professor Håkan Jönsson for the Water Prize


Photo: Julio Gonzales/SLU¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† On March 14th, Professor H√•kan J√∂nsson will be awarded the Water Prize by F√∂reningen Vatten (Society Water).¬†“Never during my 10 years in the board of F√∂reningen Vatten have we received so many heavy nominations for a certain person. Most universities, organizations and individuals in the industry have shown strong support for this prize winner“, writes Marta Ahlquist-Juhl√©n, the chairman of F√∂reningen Vatten. Among others, Prof. J√∂nsson has actively worked to close the cycle between cities and rural areas for 25 years, and his research has made a great impression. Most well-known is his commitment to upstream solutions in wastewater systems and his work on recycling plant nutrients from wastewater to arable land.

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, Bj√∂rn Vinner√•s, 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.

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 thanks. 

The Future of Sanitation Education


At a symposium hosted by the Kretsloppsteknik group, Dr. Mariska Ronteltap of the IHE Delft Institute for Water Capacity Building presented her perspective on what the future of sanitation education could look like.¬†Why is it important to build capacity in the WASH sector? How can we do it through innovative teaching methods? How can¬†MOOCs, Online Learning, Professional Diploma Programs, Active Learning, etc. towards sanitation education? Learn about this and the one-year Masters Programme¬†in Sanitation being developed by IHE in Dr. Ronteltap’s presentation.¬†

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.

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 here. 

Emerging solutions to the water challenges of an urbanizing world


How do we tackle the unprecedented increase in nutrient emissions in the world? How much nitrogen is emitted by agriculture and wastewater treatment? In her presentation at SLU, Professor Tove Larsen from EAWAG, Switzerland analyses the current wastewater treatment situation in various regions in the world. She suggests urine source separation can be part of the solution to address global nutrient emissions. To know more about this and other aspects such as the Blue Diversion Toilet and the Eawag water hub, check out Prof. Larsen’s presentation.

Improving wastewater treatment plants for increased nutrient recovery


Dr. David Gustavsson, Research Leader at Sweden Water Research loves centralized wastewater treatment plants! He starts his presentation saying…‚ÄúI really love these plants‚ÄĚ. At a symposium filled with people discussing the possibility of taking sanitation off the grid, that’s quite a statement to make. Jokingly, he further comments, ‚Äú....should I leave now?‚ÄĚ. How good are centralized WWTPs in removing unwanted substances? In nutrient removal and recovery? Is there a case to be made for the co-existence or indeed, the integration of urine diversion with the operation of such plants? How will WWTP operations be affected with increased urine diversion at source?

Click here to access Dr. Gustavsson’s presentation¬†to find out more and let us know what you think!