Kretsloppsteknik – Page 45 – Blog from the Environmental Engineering Research Group at SLU

Kretsloppstekniks Cecilia Lalander ska hålla sin docentföreläsning!

Published 18 September, 2019
By Prithvi Simha

Datum: 30/9 – 2019 | Tid: 10:30 | Plats: Lärosal L, Ulls hus, Ultuna campus

Är biologiskt nedbrytbart avfall ett problem eller en resurs? Vissa hävdar att det är en resurs som kan tas till vara bättre, men varför görs det inte? Hur skulle en bättre hantering kunna se ut? Om dessa frågor låter intressanta, kom och lyssna på Cecilias docenföreläsning. Nedan finns en engelsk sammanfattning av föreläsningen, som kommer att hållas på engelska. Mer info om alla docentföreläsningar som hålls på Ultuna nu hittas här: https://www.slu.se/ew-kalender/2019/9/docentforelasningar-vid-nj-fakulteten/

Cecilia Lalander from our group is about to give her Docent Lecture!

Published 18 September, 2019
By Prithvi Simha

Date: 30/9 – 2019 | Time: 10:30 | Location: Room L, Main University building (Ulls hus), Ultuna campus

Is biodegradable waste a problem or a resource? Some claim it’s a resource that can be managed in a much more efficient way, but how come it isn’t? How could a more efficient management look like? If you find these questions interesting, come and listen to Cecilia’s lecture. A summary of the lecture, that will be given in English, can be found below.

More info on all Docent lectures given at Ultuna this time can be found here: https://www.slu.se/en/ew-calendar/2019/9/docent-lectures-at-the-nj-faculty/

Moisture content affects greenhouse gas emissions from thermophilic food waste composting

Published 18 September, 2019
By Evgheni Ermolaev

The effects of moisture on thermophilic composting process are investigated in the latest paper published in the Journal of Cleaner Production: https://doi.org/10.1016/j.jclepro.2019.118165

It is known that too wet active composts can cause excessive methane (CH₄) emissions, but there is no consensus on how much and what exactly the rate of this change is with changing moisture.

Modeling large-scale Eskilstuna pilot fly larvae composting system

Published 18 September, 2019
By Evgheni Ermolaev

Black soldier fly larvae growth in the food waste. Photo Erik Dahlquist

A study “Model selection for waste conversion efficiency and energy demands in a pilot for large-scale larvae treatment” was presented at the 60th International Conference of Scandinavian Simulation Society, SIMS 2019, in Västerås, Sweden.

The study evaluated some technical aspects associated with larvae growth, ventilation and drying demands in a pilot sized black soldier fly treatment system treating segregated household food waste and discussed models to describe the treatment process and its energy efficiency.

Greenhouse gas emissions from small-scale fly larvae composting

Published 18 September, 2019
By Evgheni Ermolaev

Frida Erlöv taking a gas sample. Photo: Evgheni Ermolaev

A new paper evaluating the greenhouse gas (GHG) emissions from small-scale fly larvae composting is published. The full paper is available here: https://doi.org/10.1016/j.wasman.2019.07.011

The aim of the study was to evaluate GHG and ammonia (NH₃) emissions from fly larvae composting treatment of food waste and the effects of pre-treatment and seeding of the food waste substrate with BSF larvae-associated bacteria on the efficiency and rate of the fly larvae composting process.

Chinmoy Deb går med i urinsorteringsprojektet

Published 17 September, 2019
By Lovisa Lindberg

Vår tidigare praktikant, Chinmoy Deb från Indien, som kom till SLU förra året för sitt kandidatarbete om urinsortering, har framgångsrikt fått sin kandidatexamen i kemiteknik. För närvarande har Chinmoy startat sitt masterprogram i ”Jord, vatten och miljö” på SLU och har rekryterats som medlem i vår grupp. Under sitt kandidatprogram, i Indien, har han arbetat med urin för att ta bort näringsämnen och läkemedel. Med en angelägenhet om att koppla samman saniteten, hygien och jordbruk har han anslutit sig till gruppen för att fortsätta sin forskning om återvinning av växtnära näringsämnen med hjälp av urinsorteringsteknik.

Chinmoy Deb joins the Urine Drying Project

Published 17 September, 2019
By Prithvi Simha

Our former intern, Chinmoy Deb from India, who came to SLU last year for his Bachelor’s thesis on Urine Drying, has successfully received his Bachelor’s degree in Chemical Engineering. Currently, Chinmoy has started his Master’s program in “Soil, Water and Environment” at SLU and has been recruited as a member of our group. During his bachelors’ program, back in India, he had worked with urine for nutrient and pharmaceutical removal. With a keen to connect the nexus of sanitation, hygiene and agriculture, he has joined the group to continue his research on the recovery of plant essential nutrients by means of urine drying technology.

A pilot multi-module biochar filter was built and is running in a household in Gamla Uppsala

Published 16 September, 2019
By Prithvi Simha

A demonstration household biochar filter has been built and is now running in a household in Gamla Uppsala to treat wastewater from a single household of 5 person. The filter has a unique design in which the biochar is used as a filter material in a multi module cabinet staked biochar of different properties to remove different types of pollutants including organics and micro pollutants. During the upcoming period, the quality of the wastewater will be analysed for different parameters (COD, Tot-N, Tot-P and other pollutants). For more information, please contact Sahar Dalahmeh (Sahar.Dalahmeh@slu.se)

New project: development of analytical methods for extraction, identification & quantification of microplastics in sewage sludge

Published 16 September, 2019
By Prithvi Simha

With a generous financial support from eight wastewater treatment utilities in Sweden as well as from Svenskt vatten (via VA-kluster Mälardalen), Sahar Dalahmeh started a research project focusing on development of analytical method for extraction, identification and quantification of microplastics in sewage sludge. Different extraction protocols (acids, base and enzymatic extraction will be tested and optimised). Also, different identification methods will be investigated, not the least these using µ-FTIR for chemical imaging. All the equipment needed for development the method are in place including state of the art Cary 660 IR spectroscopes coupled to 620 Cary FTIR microscope (Agilent Technologies) for micro imaging and chemical scanning microscope. The projects runs during 2019-2021. For more information, please contact Sahar Dalahmeh (Sahar.Dalahmeh@slu.se)

Interest of Swedish Wastewater organisations to learn about pharmaceutical fate during sewage sludge post treatment storage & reclaimed water recycling in agriculture

Published 16 September, 2019
By Prithvi Simha

Fate of pharmaceuticals during sewage sludge storage and composting and Use of reclaimed water in agriculture: Potential, technologies, implementation, regulations and other aspects, were among the topics presented in Annual Intranet workshop VA- kluster Mäladalen 22-23^rd of august 2019. Sahar Dalahmeh hold the lectures and very active discussion followed the presentations. For more information, please contact Sahar Dalahmeh (Sahar.Dalahmeh@slu.se)