Blog from the Environmental Engineering Research Group at SLU
The partnership between the Environmental Engineering Group at SLU and Dr. Ivã Guidini Lopes from the Aquaculture Center of Unesp (São Paulo, Brazil) resulted in a second publication, entitled “Reduction of bacteria in relation to feeding regimes when treating aquaculture waste in fly larvae composting”, recently published in Frontiers in Microbiology, as part of the research topic “Microbial dynamics during industrial rearing and processing of insects”.
David Jonsson har arbetat med utveckling av en biopolymer från BSF-larvprotein och har nu avslutat sitt arbete. Gå med i hans examensarbete för examensarbete i bioteknik för att få veta mer.
David Jonsson has been working on development of a biopolymer from BSF larvae protein and now he has concluded his work. Join his Master Thesis presentation for degree project in biotechnology to find out more.
Evgheni Ermolaev from Environmental Engineering group answers a reader’s question in an article in Forskning & Framsteg.
Read the whole article (in Swedish, use google translate) at Forskning & Framsteg
Contact: Evgheni Ermolaev
Our latest publication on BSFL composting entitled Process efficiency and ventilation requirement in black soldier fly larvae composting of substrates with high water content has been recently published in Science of the Total Environment. In this study we investigated the impact on increasing substrate water content on the process efficiency in black soldier fly larvae composting. We used the gathered data to make a model predicting the required ventilation for achieving a residue dry enough to allow for dry separation of larvae from treatment residue at the end of the composting. In contrast to what other studies have found, we fund that it is possible to BSFL compost substrates with water content 80 – 90 % and dry separate the larvae from the residue. For substrates with water content >90% it was more difficult, as the process efficiency decreased greatly, while the ventilation requirement increased.
ProCivitas private school for grade 10-12 is a small school with students in the science program and the social science program. The school provide the students with lectures about research once every month, called the lecture of the month, with different themes. This month, the theme was sustainable systems and Lovisa Lindberg from the group went there to talk about fly larvae composting but also Maria Westerholm from a different department at SLU went there to talk about biogas research.
The aim of the project is to evaluate how simple the system can be and how fast the process goes. The students are driving this experiment with aim to produce feed protein that can be used for chicken or fish production. The substrate is the canteen leftovers that would otherwise become food waste. The project at the school is a part of an EU collaboration project ”Envising” with focus on sustainability.
Follow the link to check out the larvae:
A paper was published in the Journal of Cleaner Production as a result of the partnership established between the Environmental Engineering Research Group at SLU and the PhD candidate Ivã Guidini Lopes, a researcher from São Paulo, Brazil. This paper addresses the management of waste generated in aquaculture enterprises (fish carcasses) by larvae of the black soldier fly (BSF, Hermetia illucens).
Earlier this week, a few members of Kretsloppsteknik hosted a group of SIDA’s International Training Programme participants in Uppsala. NIRAS on behalf of SIDA implements a number of International Training Programmes. Kretsloppsteknik is involved as part of this program through NIRAS with focus on participants from both Asian and African countries. During these visits, we teach, present, and do technology demonstration through field visits talking about safe nutrient recycling, source-separating sanitation systems, management of organic wastes, socio-technical systems analysis, etc.
In this seminar, moderated by Alejandro Jiménez of the Stockholm International Water Institute, different aspects of employment in the sanitation sector are discussed. Rémi Kaupp from WaterAid tells us about the findings presented in a new WHO report on the Health, Safety and Dignity of Sanitation Workers. Martin Mawajje from the University of KwaZulu-Natal (South Africa) describe how the emptying services in informal settlements can be formalised using a case from Kampala, Uganda as example. Daniel Ddiba, from the Stockholm Environment Institute tells us about a tool they have developed called REWAMP that can estimate and compare the circular economy potential of sanitation derived products from different sanitation technologies. The last presenter is Cecilia Lalander from our group that gives an example on how black soldier fly larvae treatment can be implemented by a sanitation entrepreneur.
