Edible insects are receiving attention as a protein source in the food and feed sector. However, successful commercialisation requires mass production matched with appropriate processing and storage techniques. The quality of dried and pulverised black soldier fly larvae stored in woven polypropylene (PP) sacks, polyethylene (PE) bags and plastic containers with screw lid (PL) in ambient and refrigerated environments was monitored over six months. Chemical indicators (oxidation, fatty acid profile), microbiological parameters (total viable counts, yeast and moulds, Enterobacteriaceae, presumptive coliforms, Salmonella) and colour change were examined. Temperature and relative humidity of the storage environments were monitored. In the ambient environment (temperature: 23.6±2.7 °C; relative humidity: 57.6±7.0%), chemical deterioration progressed 1.5 and 1.2 times faster in PP and PE, respectively, compared to PL. Refrigeration (temperature: 5.4±1.1 °C; relative humidity: 97±5.7%) exacerbated spoilage in the PP due to permeation of moisture through the woven strands, but slowed chemical deterioration by factors of 3.3 (PL) and 2.8 (PE). Likewise, based on the average counts of Enterobacteriaceae and yeast and moulds, microbiological deterioration progressed 2.1 and 1.4 times faster in the PP and PE, respectively, while refrigeration retarded build-up of microbial loads by factors of 1.3-9.6. The presence of Salmonella spp. in the experimental product indicates that due attention must be given to adequacy of processing and handling procedures for dried black soldier fly meal.

中文翻译：

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半加工黑士兵蝇幼虫粉的化学和微生物质量在储存过程中的变化

食用昆虫作为食品和饲料领域的蛋白质来源正受到关注。但是，成功的商业化需要大规模生产以及适当的加工和存储技术。在六个月内，对储存在机织聚丙烯（PP）麻袋，聚乙烯（PE）袋和带螺旋盖（PL）的塑料容器中的干燥粉状黑士兵蝇幼虫的质量进行了监测。化学指示剂（氧化，脂肪酸谱），微生物学参数（总活菌计数，酵母和霉菌，肠杆菌科，推定大肠菌群，沙门氏菌）和颜色变化进行了检查。监视存储环境的温度和相对湿度。在周围环境中（温度：23.6±2.7°C；相对湿度：57.6±7.0％），PP和PE的化学降解速度分别是PL的1.5和1.2倍。冷藏（温度：5.4±1.1°C；相对湿度：97±5.7％）由于水分渗透到编织股中而加剧了PP的变质，但减缓了3.3（PL）和2.8（PE）引起的化学降解。同样，根据肠杆菌科细菌，酵母菌和霉菌的平均数量，PP和PE的微生物降解速度分别快2.1倍和1.4倍，而冷藏则使微生物负荷的增长减慢了1.3-9.6倍。存在的沙门氏菌属。在实验产品中的标记表明必须适当注意干燥的黑士兵果蝇粉的加工和处理程序。