Black soldier fly larvae represents a promising alternative ingredient for animal feed, but post-production processing can affect their quality. Feed withdrawal periods used to evacuate fecal matter from the gastrointestinal tract, reducing the microbial load, and killing methods are variable and poorly documented. This project aims to optimize the and killing methods of larvae to maximize product quality. Indeed, a prolonged FWP and an inappropriate killing method could alter larvae composition and ML. The gastrointestinal evacuation time of BSF larvae fed on coloured Gainesville diet was determined by following frass excretion every 12 h for 108 h. Then, FWP impact on the proximate composition and ML was measured daily over four days. Finally, the effects on the chemical composition, ML and colour of 10 killing methods were compared, i.e., blanching (B = 40 s), desiccation (D = 60 °C, 30 min), freezing (F20 = − 20 °C, 1 h; F40 = − 40 °C, 1 h; N = liquid nitrogen, 40 s), high hydrostatic pressure (HHP = 3 min, 600 MPa), grinding (G = 2 min) and asphyxiation (CO2 = 120 h; N2 = 144 h ; vacuum conditioning, V = 120 h). Although, the median GET was 72 h, a 96 h FWP did not reduce larvae ML. Certain killing methods affected the pH (B, asphyxiation), total moisture (B, asphyxiation and D), ash (B), lipid content (asphyxiation) and lipid oxidation (B, asphyxiation and D), as well as the colour stability during freeze-drying. FWP were ineffective in reducing the ML. Blanching appeared as the most appropriate method since it minimizes lipid oxidation, reduces ML and total moisture (78.1 ± 1.0%). Our studies propose a standardize protocol to kill BSF that meet the Canadian regulatory requirements of the insect production and processing industry. Various Methods - Dry Rendering and Wet Rendering

Cooking boiler consists of specifically designed rotor and paddles. Boiler gets a smooth start up with a counter measure against heavy loads from a reductor with a two way rotating engine and ‘V’ shaped pulley which is tied to its rigid coupling output. Cooking boiler is used for cooking these animal by-products: *Meat, offal and bone mixtures *Poultry animals’ feathers *Internal organs *Blood Cooker’s body is designed with a steam jacket. The rotor has a rotatory steam valve attached. The nozzle emits steam into the rotor itself. The rotor is supported by heavy duty bearings from both sides and the rotor mill prevents leakage with the adjustable gasket. 10 Bars of steam jacketing and 5 Bars of body pressure is applied. Steam jacket, intake and exit vents are all welded into the shell plate. All the steam and condensation armatures, as well as the gauges and surface coating on the boilers and the heat insulation are thoroughly tested and the boilers are delivered after their quality is assured.

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