The total amount of bio-waste produced annually in the EU by the food and beverage value chains is estimated at 37 Mtons. The possibility to use insects for the valorization of byproducts from these chains may represent a sustainable and valuable solution. This study aimed to analize the development parameters and the lipid content of black soldier fly (Hermetia illucens, Stratiomyidae) prepupae reared on byproducts obtained from different food chains. The substrates used for this experiment were: beer brewery byproducts, tomato skins and seeds, spent ground coffee, grape stalks and marcs, bread dough, cow milk whey and fish-waste material. H. illucens larvae were reared on each substrate within glass containers at 28 ± 0.5 °C and 98% relative humidity. Biological parameters such as larval weight, prepupae weight and development time were recorded. Obtained prepupae were frozen before fractionation and chemical characterization. Lipid extraction was carried out using the Folch method, adjusted for the specific samples. The total lipid content was calculated and the quantitative characterization of the fatty acid profile was performed through GC-FID analysis. The best larval performance was obtained when specimens were reared on byproducts from beer, tomato and cheese food chains. The different substrate composition was reflected in the lipid profile of H. illucens larvae. In particular, the saturated to unsaturated fatty acid ratio showed marked changes according to the substrate. The high content and type of lipids, together with the proteins and chitin extracted from the prepupae represent high-value biobased products that might be used in the feed/food industry as well as for the development of innovative biomaterials for different technological purposes. These results suggest that mass rearing of H. illucens larvae, especially on some of the tested byproducts, may be exploited for an alternative employment of the food/beverage bio-waste.
Evaluation of biological parameters and the lipid profile of black soldier fly (Hermetia illucens, Stratiomyidae) reared on byproducts from different food chains / Maistrello, L.; Hadj Saadoun, J.; Montevecchi, G.; Bortolini, S.; Macavei, L. I.. - (2018), pp. 89-89. (Intervento presentato al convegno XI th European Congress of Entomology tenutosi a Napoli nel July 2-6 2018).
Evaluation of biological parameters and the lipid profile of black soldier fly (Hermetia illucens, Stratiomyidae) reared on byproducts from different food chains
Maistrello L.;Montevecchi G.;Macavei L. I.
2018
Abstract
The total amount of bio-waste produced annually in the EU by the food and beverage value chains is estimated at 37 Mtons. The possibility to use insects for the valorization of byproducts from these chains may represent a sustainable and valuable solution. This study aimed to analize the development parameters and the lipid content of black soldier fly (Hermetia illucens, Stratiomyidae) prepupae reared on byproducts obtained from different food chains. The substrates used for this experiment were: beer brewery byproducts, tomato skins and seeds, spent ground coffee, grape stalks and marcs, bread dough, cow milk whey and fish-waste material. H. illucens larvae were reared on each substrate within glass containers at 28 ± 0.5 °C and 98% relative humidity. Biological parameters such as larval weight, prepupae weight and development time were recorded. Obtained prepupae were frozen before fractionation and chemical characterization. Lipid extraction was carried out using the Folch method, adjusted for the specific samples. The total lipid content was calculated and the quantitative characterization of the fatty acid profile was performed through GC-FID analysis. The best larval performance was obtained when specimens were reared on byproducts from beer, tomato and cheese food chains. The different substrate composition was reflected in the lipid profile of H. illucens larvae. In particular, the saturated to unsaturated fatty acid ratio showed marked changes according to the substrate. The high content and type of lipids, together with the proteins and chitin extracted from the prepupae represent high-value biobased products that might be used in the feed/food industry as well as for the development of innovative biomaterials for different technological purposes. These results suggest that mass rearing of H. illucens larvae, especially on some of the tested byproducts, may be exploited for an alternative employment of the food/beverage bio-waste.
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