| 摘要 |
The invention relates to a process for recovery of meal of high protein quality and oil from fish. To obtain a high protein quality in fish meal, one or both of the conditions of short process time and low temperature are essential factors. In the process according to the invention, the heating of the fish mass is carried out in any conventional way, and oil is separated from the heated fish mass by means of a centrifuge provided with a separate outlet for separated oil phase. The new and characterizing feature of the invention is that the stick water and sludge discharged from the centrifuge are fed together to an evaporation unit where the mixture of sludge and stick water is fed through one or several indirectly heated tubes, the internal walls of which are continuously cleaned by means of a scraping device and the outlet of which is connected to a separation space for steam and evaporated product. Finally, the evaporated product is dried in any known way. |
