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Recovery and techno-functionality of flours and proteins from two edible insect species: Meal worm ( Tenebrio molitor ) and black soldier fly ( Hermetia illucens ) larvae

2016; Elsevier BV; Volume: 2; Issue: 12 Linguagem: Inglês

10.1016/j.heliyon.2016.e00218

2405-8440

Sara Bußler, Birgit A. Rumpold, Elisabeth Jander, Harshadrai M. Rawel, Oliver Schlüter,

Insect and Arachnid Ecology and Behavior

Depending on the species, edible insects are highly nutritious and thus represent a noteworthy alternative food and feed source. The current work investigates the protein extractability and techno-functionality of insect flour fractions recovered from Tenebrio molitor and Hermetia illucens. T. molitor and H. illucens flours contained about 20% crude fat and 60% and 36 % crude protein, respectively. Defatting reduced the crude fat content to 2.8% (T. molitor) and 8.8% (H. illucens) and increased the crude protein content to 68% and 47%, respectively. To isolate proteins from the flours, protein solubility was optimized by varying the pH, the ionic strength, and the extraction temperature of the solvent. All products and by-products accumulated in the protein production process were characterized by composition, selected techno-functional properties, protein solubility, composition and structure as well as their microbial load.