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Use of pre-treatments and substrate blending to enhance process efficiency in black soldier fly larvae composting of food industry waste

Isibika, Alice (2022). Use of pre-treatments and substrate blending to enhance process efficiency in black soldier fly larvae composting of food industry waste. Diss. (sammanfattning/summary) Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880
ISBN 978-91-7760-935-3
eISBN 978-91-7760-936-0
[Doctoral thesis]

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Abstract

Black soldier fly larvae (BSFL) composting is a biowaste treatment that converts biomass into valuable animal protein and fertiliser, but low protein content and complex molecules (e.g. fibre) in substrate reduce BSFL composting efficiency. This thesis evaluated the impact of using pre-treatments and blending substrates on BSFL process efficiency. The feasibility of using BSFL composting to treat available food industry waste streams in Tanzania and physical-chemical characteristics of these wastes were also assessed.
The pre-treatments tested were biological, chemical, heat-based, biochemical and combinations of these, while blending involved mixing banana and orange peels with fish waste. All pre-treatments except heating and all substrate blends improved BSFL conversion efficiency in composting. The conversion efficiency was reduced by high concentrations of tannins, phenols, carbohydrates, fibre and fat, but increased by high protein and nitrogen concentrations.
The available food industry waste from single companies in Tanzania, in quantities of ~100,000-1,000,000 kg y-1, was not sufficiently nutritionally balanced as a standalone feedstock for BSFL composting. However, with pre-treatment and substrate blending, BSFL composting could be successfully implemented to valorise biowaste streams in cities in low and middle-income countries such as Tanzania and other similar settings globally.

Authors/Creators:Isibika, Alice
Title:Use of pre-treatments and substrate blending to enhance process efficiency in black soldier fly larvae composting of food industry waste
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2022
Number:2022:30
Number of Pages:114
Publisher:Swedish University of Agricultural Sciences
ISBN for printed version:978-91-7760-935-3
ISBN for electronic version:978-91-7760-936-0
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Article category:Other scientific
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 207 Environmental Engineering > Other Environmental Engineering
Keywords:Hermetia, Trichoderma, Rhizopus, bacteria, heat, chemical, enzyme
URN:NBN:urn:nbn:se:slu:epsilon-p-117110
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-117110
ID Code:27933
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Energy and Technology
Deposited By: SLUpub Connector
Deposited On:18 May 2022 11:26
Metadata Last Modified:31 May 2022 23:31

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