Lalander, Cecilia and Ermolaev, Evgheni and Wiklicky, Viktoria and Vinnerås, Björn
(2020).
Process efficiency and ventilation requirement in black soldier fly larvae composting of substrates with high water content.
Science of the Total Environment. 729
, 138968
[Journal article]
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Abstract
In order to transition from a linear to a circular economy in the organic waste management sector, more of the elements in waste need to be recycled. Use of black soldier fly (Hermetia illucens L.; Diptera: Stratiomyidae) larvae (BSFL) for organic waste treatment has potential to harvest more complex molecules than conventional methods. Many organic waste substrates have high water content (>80%), but the impact on BSFL treatment efficiency of substrate water contents >80% is not known. This study evaluated the impact of high water content food waste on BSFL composting efficiency in terms of waste-to-biomass conversion ratio, material reduction, larval survival and the ventilation required for enabling dry separation of larvae from residue. In total, six water contents ranging from 76% to 97.5% were evaluated in two experimental trials. It was found that increasing water content reduced biomass conversion ratio and survival rate of the larvae, from 33.4% of volatile solids (VS) and 97.2% survival in 76% water to 17.5% of VS and 19.3% survival in 97.5% water. Furthermore, we found that the ventilation requirement for achieving dry separation of larvae from residue could be modelled by estimating the amount of water that would need to be removed, taking into account the water bound in the larvae, and knowing the specifics of the ventilation set-up of the modelled system. The findings could have implications on the waste management sector interested in implementing BSFL treatment, as the findings demonstrate that it is possible to treat wet substrates (such as fruit and vegetable wastes) without any pre-treatment other than grinding and attain an adequately dry residue for enabling dry separation of the larvae from the residue. (C) 2020 The Authors. Published by Elsevier B.V.
Authors/Creators: | Lalander, Cecilia and Ermolaev, Evgheni and Wiklicky, Viktoria and Vinnerås, Björn | ||||||
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Title: | Process efficiency and ventilation requirement in black soldier fly larvae composting of substrates with high water content | ||||||
Year of publishing : | 2020 | ||||||
Volume: | 729 | ||||||
Article number: | 138968 | ||||||
Number of Pages: | 8 | ||||||
Publisher: | ELSEVIER | ||||||
ISSN: | 0048-9697 | ||||||
Language: | English | ||||||
Publication Type: | Journal article | ||||||
Article category: | Scientific peer reviewed | ||||||
Version: | Published version | ||||||
Copyright: | Creative Commons: Attribution 4.0 | ||||||
Full Text Status: | Public | ||||||
Subjects: | (A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507) | ||||||
Keywords: | Animal feed, Biodegradable waste, Circular economy, Eco-technologies, Hermetia illucens, Nutrient recycling | ||||||
URN:NBN: | urn:nbn:se:slu:epsilon-p-108296 | ||||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108296 | ||||||
Additional ID: |
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ID Code: | 18734 | ||||||
Faculty: | NJ - Fakulteten för naturresurser och jordbruksvetenskap | ||||||
Department: | (NL, NJ) > Dept. of Energy and Technology | ||||||
Deposited By: | SLUpub Connector | ||||||
Deposited On: | 25 Nov 2020 09:23 | ||||||
Metadata Last Modified: | 15 Jan 2021 19:25 |
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