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Process efficiency and greenhouse gas emissions in black soldier fly larvae composting of fruit and vegetable waste with and without pre-treatment

Lindberg, Lovisa and Ermolaev, Evgheni and Vinnerås, Björn and Lalander, Cecilia (2022). Process efficiency and greenhouse gas emissions in black soldier fly larvae composting of fruit and vegetable waste with and without pre-treatment. Journal of Cleaner Production. 338 , 130552
[Research article]

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Abstract

One technology that implements circular economy principles is black soldier fly larvae (BSFL) composting. To assess the environmental impact of BSFL technology, more data on emissions of greenhouse gases (GHG) and ammonia are needed. This study investigated process efficiency and GHG emissions from BSFL composting of orange peels and a mix of broccoli and cauliflower trimmings, with and without pre-treatment. Two weeks of substrate pre-treatment with ammonia or fungi (Trichoderma reesei) were investigated, and direct emissions of GHG and ammonia from the process were evaluated. Process efficiency was evaluated by waste-to-biomass conversion efficiency (BCE) and material reduction. In BSFL composting of trimmings, BCE was not significantly improved by pre-treatment, However, larval volatile solids (VS) load in the fungi pre-treated treatment was very low, likely contributing to low BCE. BCE was low (6%) in the peel control and even lower in the pre treatments, indicating that this substrate is unsuitable for BSFL composting. Material reduction was largest for trimmings (84%) and peels (60%) pre-treated with fungi. Emissions of methane (CH4) and nitrous oxide (N2O), expressed in CO2-eq, were very low (0.04-1.57 g/kg initial wet weight (ww)) compared with direct CO2 emissions (47-147 g/kg initial ww). Fungi pre-treatment appeared to make the trimmings more available to the larvae, while also drying out the substrate and removing a large proportion of available VS. Thus fungi pretreatment could be used to increase waste treatment capacity. Ammonia pre-treatment reduced emissions of CH4 and N2O without affecting overall BCE, but significantly increased NH3 emissions.

Authors/Creators:Lindberg, Lovisa and Ermolaev, Evgheni and Vinnerås, Björn and Lalander, Cecilia
Title:Process efficiency and greenhouse gas emissions in black soldier fly larvae composting of fruit and vegetable waste with and without pre-treatment
Series Name/Journal:Journal of Cleaner Production
Year of publishing :2022
Volume:338
Article number:130552
Number of Pages:10
Publisher:ELSEVIER SCI LTD
ISSN:0959-6526
Language:English
Publication Type:Research 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 > 2 Engineering and Technology > 209 Industrial Biotechnology > Bioenergy
Keywords:Ammonia pre-treatment, Biological treatment, Hermetia illucens, Pre-treatment, Plant-based waste, Trichoderma reesei
URN:NBN:urn:nbn:se:slu:epsilon-p-116848
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116848
Additional ID:
Type of IDID
DOI10.1016/j.jclepro.2022.130552
Web of Science (WoS)000772999300003
ID Code:27698
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Energy and Technology
Deposited By: SLUpub Connector
Deposited On:05 May 2022 07:25
Metadata Last Modified:05 May 2022 07:31

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