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Sammanfattning

Biowaste treatment using the larvae of the black soldier fly (BSFL) continues to gain attention due to its ability to process a wide range of biodegradable waste sources and convert them into valuable products. Process efficiency depends on the substrate, with single-source vegetable waste generally yielding lower waste-to-biomass conversion efficiency (BCE) compared to multi-source blends. Enzyme addition can improve efficiency; however, enzymatic degradation releases water, resulting in a residue with a higher moisture content. This could be balanced by adding drier substrates, like insect frass. This study evaluated the impact of enzymes and/or frass additions to cucumber plant residuals on the process efficiency of BSFL composting, assessed in terms of BCE, material reduction, larval yield and the feasibility of dry sieving larvae. The study evaluated the most effective enzyme concentration for process and dry sieving efficiency, along with the impact of frass addition and varying larval and substrate densities. Adding both enzymes and frass was the only treatment that resulted in a significant increase in BCE, material reduction and larval yield compared to the control. The combination of enzymes and frass better facilitated the harvesting process in comparison to adding frass alone. In one treatment, where only half the substrate was added and a plastic foam cover was used, the harvesting process was simplified and the process efficiency increased; however, the larval yield did not differ from the control. The incorporation of enzymes and frass requires validation on an industrial scale to determine their suitability for treatments with BSFL composting.

Nyckelord

Biological treatment; Hermetia illucens; Enzyme hydrolysis; Lignocellulose; Co-treatment; Cellulase; Pectinase

Publicerad i

Utgivare: ELSEVIER SCI LTD

SLU författare

UKÄ forskningsämne

Annan miljöbioteknik

Publikationens identifierare

  • DOI: https://doi.org/10.1016/j.jece.2025.118061

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/144049