Abstract Hermetia illucens L., commonly known as the black soldier fly (BSF), is an exemplary group of insects known for waste decomposition, and its maggots can be utilized as a protein source for livestock, poultry, and fish applications. The propagation of BSF maggots is relatively straightforward and can be cultivated on a large scale, contingent upon the type of feed provided. Chitin, present in the outer layer of BSF maggots, can act as an anti-nutrient, diminishing its benefits as a protein feed. This research aimed to evaluate maggot development based on the optimal harvesting time to achieve the lowest chitin content along with other proximate elements (nutrients) of significance. A quantity of 10 grams of BSF eggs was cultivated in a waste medium comprising tofu dregs and fruit and vegetable wastes. Harvesting was performed on 14, 16, 18, and 20-day. Proximate analysis results indicate that the 18th day was the optimum time for harvesting BSF maggots, just before reaching maturity, exhibiting the lowest chitin content and the highest protein levels. The findings of this study will serve as a reference for pre-treatment to reduce chitin content in BSF maggots before in vivo testing on broiler chickens.
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