A burner arrangement is provided. The liner includes an upper portion of uniform cross-sectional configuration conforming to the cross-sectional configuration of the sleeve and a lower portion of downwardly and inwardly tapering configuration terminating in a bottom liner opening positioned proximate the pallet discharge port. The light is provided to the light source output through an optical fiber from a light box which includes electronic filtering and shutter operations. A liquid-tight seal prevents bodily fluids from contaminating the actuator cartridge and this enables the actuator cartridge to be removed from the extraction cartridge and to be reused.