As sales have increased in recent years, enhancing production processes and quality has emerged as a significant challenge for the cricket industry. In this study, we investigated the impact of supplementing feed with black soldier fly larvae (BSFL) on the yield, nutritional characteristics, and protein digestibility of Acheta domesticus. In addition, the bioactivity of house cricket proteins was compared. The results demonstrated that incorporating BSFL into feed improved the yield and nutritional characteristics of house cricket, such as crude protein levels and total phenolic content. Alterations in amino acid and fatty acid profiles also enhanced their nutritional value. In addition, 5% BSFL and 10% BSFL were more readily digested, and the protein hydrolysate of the groups fed BSFL demonstrated stronger antioxidant activity. The findings of this study can offer valuable insights into house cricket farming, protein processing, and the development of new food products.

This research emphasizes the application of ultrafine grinding technologies to optimize the extraction process of chitin from house crickets (Acheta domesticus), aiming to establish a more sustainable and efficient production method. This study evaluates the extraction efficiency of two advanced ultrafine grinding techniques: (1) fluidized bed jet milling (FBJM) and (2) graded impact milling (GIM), alongside a traditional hand sieving method. A comprehensive analysis of the chemical composition of the extracted chitin was performed, measuring critical parameters such as moisture content, residual ash, and protein levels, while also assessing its physicochemical properties. The results demonstrate that the implementation of ultrafine grinding methods significantly enhances both the yield and purity of chitin, while also reducing raw material consumption. This highlights the potential of house crickets as a sustainable source of biomaterials. The findings provide essential theoretical insights and practical guidance for the future development and application of chitin derived from insects.