| 摘要 |
Animal and poultry blood from slaughter houses and poultryprocessing plants is efficiently dried without loss or destruction of the desirable protein and amino acids content thereof and without creating pollution problems. In one embodiment, the raw blood is ground to break up gelatin-like globules, and masses of impurities such as hair, feathers, hide and the like, has the plasma coagulated at low temperatures, is next finely comminuted to form a free-flowing slurry and is then deposited onto the descending side of the top of a heated drier drum and formed into a film by one or more spreader rolls. In another embodiment, the raw blood is comminuted in a high speed hammer mill, screened, and fed to the drier drum, coagulated on top of the drum and formed into a film by the spreader rolls. The film is rapidly dried and scraped from the ascending side of the drum in the form of a dried sheet which can then either be flaked or pulverized to provide a high grade blood meal product. Liquid dripping from the drier drum is recirculated back to the drum in advance of the layer deposited from the main feed. Vapors above the drying cylinder are scrubbed before being released to the atmosphere and represent the only effluents from the process.
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